3 channel added routed

1 files changed, 449 insertions, 259 deletions

diff --git a/PID_servo/PID_servo.sch b/PID_servo/PID_servo.sch
index f9be17c..f23b5af 100644
--- a/PID_servo/PID_servo.sch
+++ b/PID_servo/PID_servo.sch
@@ -937,7 +937,7 @@ part #640456-3</description>
 </classes>
 <parts>
 <part name="INPUT" library="evmik_bnc_sma_connectors" deviceset="CONN-BNC" device="TYPE3HORIZ"/>
-<part name="ERROR/CH1" library="evmik_bnc_sma_connectors" deviceset="CONN-BNC" device="TYPE3HORIZ"/>
+<part name="ERROR/CH2" library="evmik_bnc_sma_connectors" deviceset="CONN-BNC" device="TYPE3HORIZ"/>
 <part name="BUFFER" library="evmik_opamp" deviceset="OPAMP_GENERIC_SIMPLE" device="SOIC8" value="OPA27"/>
 <part name="V_ERROR" library="evmik_opamp" deviceset="OPAMP_GENERIC_SIMPLE" device="SOIC8" value="OPA27"/>
 <part name="INT" library="evmik_opamp" deviceset="OPAMP_GENERIC_SIMPLE" device="SOIC8" value="OPA27"/>
@@ -988,9 +988,9 @@ part #640456-3</description>
 <part name="R9" library="evmik_rcl" deviceset="R1206" device="" value="100k"/>
 <part name="R6" library="evmik_rcl" deviceset="R1206" device="" value="100k"/>
 <part name="R13" library="evmik_rcl" deviceset="R1206" device="" value="100k"/>
-<part name="PI_COMM" library="evmik_opamp" deviceset="OPAMP_GENERIC_SIMPLE" device="SOIC8" value="OPA27"/>
+<part name="CH2_AMP" library="evmik_opamp" deviceset="OPAMP_GENERIC_SIMPLE" device="SOIC8" value="OPA27"/>
 <part name="ERR_INV" library="evmik_opamp" deviceset="OPAMP_GENERIC_SIMPLE" device="SOIC8" value="OPA27"/>
-<part name="SWEEP_AMP" library="evmik_opamp" deviceset="OPAMP_GENERIC_SIMPLE" device="SOIC8" value="OPA27"/>
+<part name="CH3_AMP" library="evmik_opamp" deviceset="OPAMP_GENERIC_SIMPLE" device="SOIC8" value="OPA27"/>
 <part name="OUT_ADD" library="evmik_opamp" deviceset="OPAMP_GENERIC_SIMPLE" device="SOIC8" value="OPA27"/>
 <part name="P+9" library="evmik_supply" deviceset="V+" device=""/>
 <part name="P+10" library="evmik_supply" deviceset="V+" device=""/>
@@ -1002,9 +1002,9 @@ part #640456-3</description>
 <part name="P-12" library="evmik_supply" deviceset="V-" device=""/>
 <part name="P-13" library="evmik_supply" deviceset="V-" device=""/>
 <part name="R14" library="evmik_rcl" deviceset="R1206" device="" value="1k"/>
-<part name="COMMON_GAIN" library="evmik_trimmers" deviceset="OFFBOARD_3PIN" device="" value="10k"/>
+<part name="CH2_GAIN" library="evmik_trimmers" deviceset="OFFBOARD_3PIN" device="" value="10k"/>
 <part name="INV_SW" library="evmik_switches" deviceset="OFF_BOARD" device=""/>
-<part name="SWEEP_GAIN" library="evmik_trimmers" deviceset="OFFBOARD_3PIN" device="" value="10k"/>
+<part name="CH3_GAIN" library="evmik_trimmers" deviceset="OFFBOARD_3PIN" device="" value="10k"/>
 <part name="R15" library="evmik_rcl" deviceset="R1206" device="" value="10k"/>
 <part name="R16" library="evmik_rcl" deviceset="R1206" device="" value="10k"/>
 <part name="R20" library="evmik_rcl" deviceset="R1206" device="" value="0"/>
@@ -1018,7 +1018,7 @@ part #640456-3</description>
 <part name="R17" library="evmik_rcl" deviceset="R1206" device="" value="100k"/>
 <part name="R21" library="evmik_rcl" deviceset="R1206" device="" value="100k"/>
 <part name="R18" library="evmik_rcl" deviceset="R1206" device="" value="100k"/>
-<part name="SWEEP/CH2" library="evmik_bnc_sma_connectors" deviceset="CONN-BNC" device="TYPE3HORIZ"/>
+<part name="SWEEP/CH3" library="evmik_bnc_sma_connectors" deviceset="CONN-BNC" device="TYPE3HORIZ"/>
 <part name="OUTPUT" library="evmik_bnc_sma_connectors" deviceset="CONN-BNC" device="TYPE3HORIZ"/>
 <part name="R22" library="evmik_rcl" deviceset="R1206" device="" value="100k"/>
 <part name="SUPPLY12" library="evmik_supply" deviceset="GND" device=""/>
@@ -1079,9 +1079,9 @@ part #640456-3</description>
 <part name="BST" library="evmik_testpads" deviceset="TP-13" device=""/>
 <part name="BST_INV" library="evmik_testpads" deviceset="TP-13" device=""/>
 <part name="PI" library="evmik_testpads" deviceset="TP-13" device=""/>
-<part name="V_COM" library="evmik_testpads" deviceset="TP-13" device=""/>
+<part name="CH2_OUT" library="evmik_testpads" deviceset="TP-13" device=""/>
 <part name="E_INV" library="evmik_testpads" deviceset="TP-13" device=""/>
-<part name="SWP" library="evmik_testpads" deviceset="TP-13" device=""/>
+<part name="CH3_OUT" library="evmik_testpads" deviceset="TP-13" device=""/>
 <part name="OUT_TP" library="evmik_testpads" deviceset="TP-13" device=""/>
 <part name="V_OFF" library="evmik_testpads" deviceset="TP-13" device=""/>
 <part name="SUPPLY35" library="evmik_supply" deviceset="GND" device=""/>
@@ -1101,7 +1101,7 @@ part #640456-3</description>
 <part name="R31" library="evmik_rcl" deviceset="R1206" device="" value="47k"/>
 <part name="SUPPLY36" library="evmik_supply" deviceset="GND" device=""/>
 <part name="SUPPLY6" library="evmik_supply" deviceset="GND" device=""/>
-<part name="V_MODIN" library="evmik_testpads" deviceset="TP-13" device=""/>
+<part name="CH3_IN" library="evmik_testpads" deviceset="TP-13" device=""/>
 <part name="PI_OUT" library="evmik_connectors_3pin" deviceset="3PIN_SIGNALS" device=""/>
 <part name="SUPPLY39" library="evmik_supply" deviceset="GND" device=""/>
 <part name="PWR1" library="evmik_connectors_3pin" deviceset="3PIN_PWR" device=""/>
@@ -1110,6 +1110,28 @@ part #640456-3</description>
 <part name="R36" library="evmik_rcl" deviceset="R1206" device=""/>
 <part name="R37" library="evmik_rcl" deviceset="R1206" device="" value="0"/>
 <part name="R38" library="evmik_rcl" deviceset="R1206" device="" value="inf"/>
+<part name="CH1_AMP" library="evmik_opamp" deviceset="OPAMP_GENERIC_SIMPLE" device="SOIC8" value="OPA27"/>
+<part name="P+14" library="evmik_supply" deviceset="V+" device=""/>
+<part name="P-14" library="evmik_supply" deviceset="V-" device=""/>
+<part name="R39" library="evmik_rcl" deviceset="R1206" device="" value="1k"/>
+<part name="CH1_GAIN" library="evmik_trimmers" deviceset="OFFBOARD_3PIN" device="" value="10k"/>
+<part name="R40" library="evmik_rcl" deviceset="R1206" device="" value="100k"/>
+<part name="C6" library="evmik_rcl" deviceset="C0805" device="" value="100n"/>
+<part name="C27" library="evmik_rcl" deviceset="C0805" device="" value="100n"/>
+<part name="CH1_OUT" library="evmik_testpads" deviceset="TP-13" device=""/>
+<part name="SUPPLY40" library="evmik_supply" deviceset="GND" device=""/>
+<part name="R41" library="evmik_rcl" deviceset="R1206" device="" value="1k"/>
+<part name="SUPPLY41" library="evmik_supply" deviceset="GND" device=""/>
+<part name="SUPPLY42" library="evmik_supply" deviceset="GND" device=""/>
+<part name="CH1/DITHER_IN" library="evmik_connectors_3pin" deviceset="3PIN_SIGNALS" device=""/>
+<part name="SUPPLY43" library="evmik_supply" deviceset="GND" device=""/>
+<part name="R42" library="evmik_rcl" deviceset="R1206" device="" value="0"/>
+<part name="R43" library="evmik_rcl" deviceset="R1206" device="" value="inf"/>
+<part name="CH1_IN" library="evmik_testpads" deviceset="TP-13" device=""/>
+<part name="CH2_IN" library="evmik_testpads" deviceset="TP-13" device=""/>
+<part name="R44" library="evmik_rcl" deviceset="R1206" device="" value="inf"/>
+<part name="R45" library="evmik_rcl" deviceset="R1206" device="" value="0"/>
+<part name="SUPPLY44" library="evmik_supply" deviceset="GND" device=""/>
 </parts>
 <sheets>
 <sheet>
@@ -1120,19 +1142,19 @@ R6 should also follow the rule of 10
 with the 10k pot for the proportional gain</text>
 <text x="-109.22" y="162.56" size="10.16" layer="97">PI Servo
 Designed by Owen Wolfe and Eugeniy E. Mikhailov</text>
-<rectangle x1="-66.04" y1="-248.92" x2="208.28" y2="-48.26" layer="98"/>
-<text x="63.5" y="-81.28" size="7.62" layer="97">Summing amplifier with offset</text>
-<rectangle x1="-109.22" y1="-33.02" x2="337.82" y2="121.92" layer="98"/>
+<rectangle x1="-38.1" y1="-396.24" x2="236.22" y2="-101.6" layer="98"/>
+<text x="83.82" y="-121.92" size="7.62" layer="97">Summing amplifier with offset</text>
+<rectangle x1="-109.22" y1="-33.02" x2="342.9" y2="121.92" layer="98"/>
 <rectangle x1="243.84" y1="144.78" x2="337.82" y2="200.66" layer="98"/>
 <text x="251.46" y="187.96" size="7.62" layer="97">Power hookup</text>
 <text x="-101.6" y="106.68" size="7.62" layer="97">PI part</text>
 <text x="-109.22" y="137.16" size="10.16" layer="97">June 2014 v1.0</text>
-<text x="78.74" y="-101.6" size="5.08" layer="97">Install jumpers R35 and R35
-to make 2 channel preamp</text>
+<text x="83.82" y="-139.7" size="5.08" layer="97">Install jumpers R35 and R35
+to make 3 channels preamp</text>
 </plain>
 <instances>
-<instance part="INPUT" gate="." x="-73.66" y="66.04" rot="MR0"/>
-<instance part="ERROR/CH1" gate="." x="60.96" y="5.08"/>
+<instance part="INPUT" gate="." x="-83.82" y="66.04" rot="MR0"/>
+<instance part="ERROR/CH2" gate="." x="60.96" y="5.08"/>
 <instance part="BUFFER" gate="G$1" x="-45.72" y="68.58"/>
 <instance part="V_ERROR" gate="G$1" x="22.86" y="68.58"/>
 <instance part="INT" gate="G$1" x="170.18" y="63.5"/>
@@ -1141,7 +1163,7 @@ to make 2 channel preamp</text>
 <instance part="BOOST_INV" gate="G$1" x="259.08" y="58.42"/>
 <instance part="R1" gate="G$1" x="-17.78" y="71.12"/>
 <instance part="R3" gate="G$1" x="22.86" y="88.9"/>
-<instance part="R2" gate="G$1" x="-15.24" y="15.24"/>
+<instance part="R2" gate="G$1" x="-12.7" y="15.24"/>
 <instance part="V_SET" gate="G$1" x="-33.02" y="15.24"/>
 <instance part="R24" gate="G$1" x="-33.02" y="30.48" rot="R90"/>
 <instance part="R25" gate="G$1" x="-33.02" y="0" rot="R90"/>
@@ -1185,49 +1207,49 @@ to make 2 channel preamp</text>
 <instance part="R9" gate="G$1" x="203.2" y="33.02" rot="R180"/>
 <instance part="R6" gate="G$1" x="254" y="10.16" rot="R180"/>
 <instance part="R13" gate="G$1" x="289.56" y="40.64"/>
-<instance part="PI_COMM" gate="G$1" x="30.48" y="-101.6"/>
+<instance part="CH2_AMP" gate="G$1" x="58.42" y="-248.92"/>
 <instance part="ERR_INV" gate="G$1" x="106.68" y="66.04"/>
-<instance part="SWEEP_AMP" gate="G$1" x="10.16" y="-172.72"/>
-<instance part="OUT_ADD" gate="G$1" x="104.14" y="-162.56"/>
-<instance part="P+9" gate="1" x="27.94" y="-76.2"/>
-<instance part="P+10" gate="1" x="7.62" y="-152.4"/>
+<instance part="CH3_AMP" gate="G$1" x="38.1" y="-320.04"/>
+<instance part="OUT_ADD" gate="G$1" x="132.08" y="-309.88"/>
+<instance part="P+9" gate="1" x="55.88" y="-223.52"/>
+<instance part="P+10" gate="1" x="35.56" y="-299.72"/>
 <instance part="P+11" gate="1" x="104.14" y="81.28"/>
-<instance part="P+12" gate="1" x="101.6" y="-144.78"/>
-<instance part="P-9" gate="1" x="27.94" y="-119.38"/>
+<instance part="P+12" gate="1" x="129.54" y="-292.1"/>
+<instance part="P-9" gate="1" x="55.88" y="-266.7"/>
 <instance part="P-10" gate="1" x="104.14" y="53.34"/>
-<instance part="P-11" gate="1" x="101.6" y="-177.8"/>
-<instance part="P-12" gate="1" x="7.62" y="-187.96"/>
-<instance part="P-13" gate="1" x="48.26" y="-241.3"/>
-<instance part="R14" gate="G$1" x="12.7" y="-99.06"/>
-<instance part="COMMON_GAIN" gate="G$1" x="30.48" y="-63.5" rot="R270"/>
+<instance part="P-11" gate="1" x="129.54" y="-325.12"/>
+<instance part="P-12" gate="1" x="35.56" y="-335.28"/>
+<instance part="P-13" gate="1" x="76.2" y="-388.62"/>
+<instance part="R14" gate="G$1" x="40.64" y="-246.38"/>
+<instance part="CH2_GAIN" gate="G$1" x="58.42" y="-210.82" rot="R270"/>
 <instance part="INV_SW" gate="G$1" x="86.36" y="58.42"/>
-<instance part="SWEEP_GAIN" gate="G$1" x="10.16" y="-144.78" rot="R270"/>
+<instance part="CH3_GAIN" gate="G$1" x="38.1" y="-292.1" rot="R270"/>
 <instance part="R15" gate="G$1" x="88.9" y="68.58"/>
 <instance part="R16" gate="G$1" x="104.14" y="88.9"/>
-<instance part="R20" gate="G$1" x="48.26" y="-231.14" rot="R90"/>
-<instance part="R19" gate="G$1" x="48.26" y="-205.74" rot="R90"/>
-<instance part="OFFSET" gate="G$1" x="48.26" y="-218.44"/>
-<instance part="P+13" gate="1" x="48.26" y="-187.96" rot="MR0"/>
+<instance part="R20" gate="G$1" x="76.2" y="-378.46" rot="R90"/>
+<instance part="R19" gate="G$1" x="76.2" y="-353.06" rot="R90"/>
+<instance part="OFFSET" gate="G$1" x="76.2" y="-365.76"/>
+<instance part="P+13" gate="1" x="76.2" y="-335.28" rot="MR0"/>
 <instance part="SUPPLY9" gate="1" x="81.28" y="22.86"/>
-<instance part="SUPPLY10" gate="1" x="-2.54" y="-193.04"/>
+<instance part="SUPPLY10" gate="1" x="25.4" y="-340.36"/>
 <instance part="SUPPLY11" gate="1" x="297.18" y="0"/>
-<instance part="R23" gate="G$1" x="-12.7" y="-170.18"/>
-<instance part="R17" gate="G$1" x="60.96" y="-101.6"/>
-<instance part="R21" gate="G$1" x="68.58" y="-218.44"/>
-<instance part="R18" gate="G$1" x="50.8" y="-172.72"/>
-<instance part="SWEEP/CH2" gate="." x="-30.48" y="-170.18" rot="MR0"/>
-<instance part="OUTPUT" gate="." x="144.78" y="-157.48"/>
-<instance part="R22" gate="G$1" x="99.06" y="-132.08"/>
-<instance part="SUPPLY12" gate="1" x="-30.48" y="-180.34"/>
-<instance part="SUPPLY13" gate="1" x="144.78" y="-167.64"/>
-<instance part="SUPPLY14" gate="1" x="96.52" y="-185.42"/>
-<instance part="SUPPLY15" gate="1" x="63.5" y="-233.68"/>
-<instance part="C19" gate="G$1" x="63.5" y="-226.06" rot="R90"/>
+<instance part="R23" gate="G$1" x="15.24" y="-317.5"/>
+<instance part="R17" gate="G$1" x="88.9" y="-248.92"/>
+<instance part="R21" gate="G$1" x="101.6" y="-365.76"/>
+<instance part="R18" gate="G$1" x="78.74" y="-320.04"/>
+<instance part="SWEEP/CH3" gate="." x="-2.54" y="-317.5" rot="MR0"/>
+<instance part="OUTPUT" gate="." x="172.72" y="-304.8"/>
+<instance part="R22" gate="G$1" x="129.54" y="-279.4"/>
+<instance part="SUPPLY12" gate="1" x="-2.54" y="-327.66"/>
+<instance part="SUPPLY13" gate="1" x="172.72" y="-314.96"/>
+<instance part="SUPPLY14" gate="1" x="124.46" y="-332.74"/>
+<instance part="SUPPLY15" gate="1" x="91.44" y="-381"/>
+<instance part="C19" gate="G$1" x="91.44" y="-373.38" rot="R90"/>
 <instance part="C25" gate="G$1" x="297.18" y="175.26" rot="R90"/>
 <instance part="C26" gate="G$1" x="297.18" y="162.56" rot="R90"/>
 <instance part="C+" gate="G$1" x="276.86" y="175.26" rot="R90"/>
 <instance part="C-" gate="G$1" x="276.86" y="165.1" rot="R90"/>
-<instance part="SUPPLY16" gate="1" x="-73.66" y="55.88" rot="MR0"/>
+<instance part="SUPPLY16" gate="1" x="-83.82" y="55.88" rot="MR0"/>
 <instance part="C0" gate="G$1" x="-43.18" y="83.82"/>
 <instance part="C2" gate="G$1" x="-45.72" y="55.88" rot="R180"/>
 <instance part="C4" gate="G$1" x="25.4" y="55.88" rot="R180"/>
@@ -1240,14 +1262,14 @@ to make 2 channel preamp</text>
 <instance part="C12" gate="G$1" x="261.62" y="48.26"/>
 <instance part="C13" gate="G$1" x="292.1" y="30.48"/>
 <instance part="C14" gate="G$1" x="292.1" y="2.54"/>
-<instance part="C20" gate="G$1" x="15.24" y="-157.48"/>
-<instance part="C21" gate="G$1" x="15.24" y="-182.88"/>
-<instance part="C15" gate="G$1" x="33.02" y="-83.82"/>
-<instance part="C16" gate="G$1" x="33.02" y="-114.3"/>
+<instance part="C20" gate="G$1" x="43.18" y="-304.8"/>
+<instance part="C21" gate="G$1" x="43.18" y="-330.2"/>
+<instance part="C15" gate="G$1" x="60.96" y="-231.14"/>
+<instance part="C16" gate="G$1" x="60.96" y="-261.62"/>
 <instance part="C18" gate="G$1" x="111.76" y="55.88"/>
 <instance part="C17" gate="G$1" x="111.76" y="78.74"/>
-<instance part="C22" gate="G$1" x="106.68" y="-147.32"/>
-<instance part="C23" gate="G$1" x="106.68" y="-172.72"/>
+<instance part="C22" gate="G$1" x="134.62" y="-294.64"/>
+<instance part="C23" gate="G$1" x="134.62" y="-320.04"/>
 <instance part="SUPPLY18" gate="1" x="-38.1" y="81.28"/>
 <instance part="SUPPLY19" gate="1" x="-38.1" y="50.8"/>
 <instance part="SUPPLY20" gate="1" x="30.48" y="50.8"/>
@@ -1259,64 +1281,83 @@ to make 2 channel preamp</text>
 <instance part="SUPPLY26" gate="1" x="269.24" y="73.66" rot="R90"/>
 <instance part="SUPPLY27" gate="1" x="119.38" y="78.74" rot="R90"/>
 <instance part="SUPPLY28" gate="1" x="121.92" y="55.88"/>
-<instance part="SUPPLY29" gate="1" x="114.3" y="-147.32"/>
-<instance part="SUPPLY30" gate="1" x="114.3" y="-172.72"/>
+<instance part="SUPPLY29" gate="1" x="142.24" y="-294.64"/>
+<instance part="SUPPLY30" gate="1" x="142.24" y="-320.04"/>
 <instance part="SUPPLY31" gate="1" x="33.02" y="81.28" rot="R90"/>
-<instance part="SUPPLY32" gate="1" x="22.86" y="-185.42"/>
-<instance part="SUPPLY33" gate="1" x="22.86" y="-160.02"/>
+<instance part="SUPPLY32" gate="1" x="50.8" y="-332.74"/>
+<instance part="SUPPLY33" gate="1" x="50.8" y="-307.34"/>
 <instance part="SUPPLY34" gate="1" x="299.72" y="27.94"/>
-<instance part="IN" gate="G$1" x="-60.96" y="68.58"/>
+<instance part="IN" gate="G$1" x="-76.2" y="71.12"/>
 <instance part="BUFF" gate="G$1" x="-27.94" y="71.12"/>
 <instance part="V+" gate="G$1" x="304.8" y="180.34"/>
 <instance part="GND" gate="G$1" x="304.8" y="170.18"/>
 <instance part="V-" gate="G$1" x="304.8" y="157.48"/>
-<instance part="SET_TP" gate="G$1" x="-22.86" y="15.24"/>
+<instance part="SET_TP" gate="G$1" x="-22.86" y="20.32"/>
 <instance part="V_ERR" gate="G$1" x="45.72" y="71.12"/>
 <instance part="V_INT" gate="G$1" x="182.88" y="63.5"/>
 <instance part="BST" gate="G$1" x="233.68" y="60.96"/>
 <instance part="BST_INV" gate="G$1" x="281.94" y="63.5"/>
 <instance part="PI" gate="G$1" x="299.72" y="12.7" rot="R180"/>
-<instance part="V_COM" gate="G$1" x="53.34" y="-99.06"/>
+<instance part="CH2_OUT" gate="G$1" x="81.28" y="-246.38"/>
 <instance part="E_INV" gate="G$1" x="129.54" y="66.04" rot="R180"/>
-<instance part="SWP" gate="G$1" x="35.56" y="-172.72"/>
-<instance part="OUT_TP" gate="G$1" x="127" y="-157.48"/>
-<instance part="V_OFF" gate="G$1" x="55.88" y="-218.44"/>
-<instance part="SUPPLY35" gate="1" x="40.64" y="-88.9"/>
-<instance part="FEEDBACK" gate="G$1" x="73.66" y="-170.18" rot="MR180"/>
+<instance part="CH3_OUT" gate="G$1" x="63.5" y="-320.04"/>
+<instance part="OUT_TP" gate="G$1" x="154.94" y="-304.8"/>
+<instance part="V_OFF" gate="G$1" x="83.82" y="-365.76"/>
+<instance part="SUPPLY35" gate="1" x="68.58" y="-236.22"/>
+<instance part="FEEDBACK" gate="G$1" x="101.6" y="-317.5" rot="MR180"/>
 <instance part="R26" gate="G$1" x="12.7" y="58.42" rot="R90"/>
 <instance part="R27" gate="G$1" x="160.02" y="55.88" rot="R90"/>
 <instance part="R28" gate="G$1" x="208.28" y="53.34" rot="R90"/>
 <instance part="R29" gate="G$1" x="248.92" y="50.8" rot="R90"/>
-<instance part="R30" gate="G$1" x="15.24" y="-111.76" rot="R90"/>
+<instance part="R30" gate="G$1" x="43.18" y="-259.08" rot="R90"/>
 <instance part="R32" gate="G$1" x="81.28" y="38.1" rot="R90"/>
-<instance part="R33" gate="G$1" x="-2.54" y="-182.88" rot="R90"/>
-<instance part="R34" gate="G$1" x="96.52" y="-172.72" rot="R90"/>
+<instance part="R33" gate="G$1" x="25.4" y="-330.2" rot="R90"/>
+<instance part="R34" gate="G$1" x="124.46" y="-320.04" rot="R90"/>
 <instance part="R4" gate="G$1" x="152.4" y="66.04"/>
 <instance part="SUPPLY17" gate="1" x="12.7" y="45.72"/>
-<instance part="SUPPLY37" gate="1" x="15.24" y="-121.92"/>
-<instance part="SUPPLY38" gate="1" x="40.64" y="-121.92"/>
+<instance part="SUPPLY37" gate="1" x="43.18" y="-269.24"/>
+<instance part="SUPPLY38" gate="1" x="68.58" y="-269.24"/>
 <instance part="R31" gate="G$1" x="266.7" y="-2.54" rot="R90"/>
 <instance part="SUPPLY36" gate="1" x="266.7" y="-15.24"/>
 <instance part="SUPPLY6" gate="1" x="187.96" y="22.86"/>
-<instance part="V_MODIN" gate="G$1" x="-20.32" y="-165.1"/>
-<instance part="PI_OUT" gate="G$1" x="-12.7" y="-109.22" rot="R270"/>
-<instance part="SUPPLY39" gate="1" x="-20.32" y="-116.84"/>
+<instance part="CH3_IN" gate="G$1" x="7.62" y="-312.42"/>
+<instance part="PI_OUT" gate="G$1" x="322.58" y="-5.08" rot="R270"/>
+<instance part="SUPPLY39" gate="1" x="320.04" y="-12.7"/>
 <instance part="PWR1" gate="G$1" x="266.7" y="170.18" rot="R90"/>
 <instance part="PWR2" gate="G$1" x="317.5" y="170.18" rot="MR90"/>
-<instance part="R35" gate="G$1" x="76.2" y="-185.42"/>
-<instance part="R36" gate="G$1" x="76.2" y="-157.48"/>
-<instance part="R37" gate="G$1" x="317.5" y="12.7" rot="R180"/>
-<instance part="R38" gate="G$1" x="45.72" y="-5.08" rot="R270"/>
+<instance part="R35" gate="G$1" x="104.14" y="-332.74"/>
+<instance part="R36" gate="G$1" x="104.14" y="-304.8"/>
+<instance part="R37" gate="G$1" x="312.42" y="12.7" rot="R180"/>
+<instance part="R38" gate="G$1" x="116.84" y="-2.54" rot="R270"/>
+<instance part="CH1_AMP" gate="G$1" x="55.88" y="-160.02"/>
+<instance part="P+14" gate="1" x="53.34" y="-134.62"/>
+<instance part="P-14" gate="1" x="53.34" y="-177.8"/>
+<instance part="R39" gate="G$1" x="38.1" y="-157.48"/>
+<instance part="CH1_GAIN" gate="G$1" x="55.88" y="-121.92" rot="R270"/>
+<instance part="R40" gate="G$1" x="86.36" y="-160.02"/>
+<instance part="C6" gate="G$1" x="58.42" y="-142.24"/>
+<instance part="C27" gate="G$1" x="58.42" y="-172.72"/>
+<instance part="CH1_OUT" gate="G$1" x="78.74" y="-157.48"/>
+<instance part="SUPPLY40" gate="1" x="66.04" y="-147.32"/>
+<instance part="R41" gate="G$1" x="40.64" y="-170.18" rot="R90"/>
+<instance part="SUPPLY41" gate="1" x="40.64" y="-180.34"/>
+<instance part="SUPPLY42" gate="1" x="66.04" y="-180.34"/>
+<instance part="CH1/DITHER_IN" gate="G$1" x="-12.7" y="-167.64" rot="MR270"/>
+<instance part="SUPPLY43" gate="1" x="5.08" y="-175.26"/>
+<instance part="R42" gate="G$1" x="-66.04" y="66.04"/>
+<instance part="R43" gate="G$1" x="-73.66" y="50.8" rot="R90"/>
+<instance part="CH1_IN" gate="G$1" x="10.16" y="-152.4"/>
+<instance part="CH2_IN" gate="G$1" x="12.7" y="-238.76"/>
+<instance part="R44" gate="G$1" x="-66.04" y="91.44"/>
+<instance part="R45" gate="G$1" x="-45.72" y="91.44"/>
+<instance part="SUPPLY44" gate="1" x="-73.66" y="88.9" rot="MR0"/>
 </instances>
 <busses>
 </busses>
 <nets>
 <net name="V_ERR" class="0">
 <segment>
-<pinref part="BUFFER" gate="G$1" pin="-IN"/>
-<wire x1="-53.34" y1="71.12" x2="-55.88" y2="71.12" width="0.1524" layer="91"/>
-<wire x1="-55.88" y1="71.12" x2="-55.88" y2="91.44" width="0.1524" layer="91"/>
-<wire x1="-55.88" y1="91.44" x2="-33.02" y2="91.44" width="0.1524" layer="91"/>
+<wire x1="-40.64" y1="91.44" x2="-33.02" y2="91.44" width="0.1524" layer="91"/>
 <wire x1="-33.02" y1="91.44" x2="-33.02" y2="71.12" width="0.1524" layer="91"/>
 <pinref part="BUFFER" gate="G$1" pin="OUT"/>
 <wire x1="-33.02" y1="71.12" x2="-33.02" y2="68.58" width="0.1524" layer="91"/>
@@ -1327,19 +1368,22 @@ to make 2 channel preamp</text>
 <pinref part="BUFF" gate="G$1" pin="TP"/>
 <wire x1="-27.94" y1="71.12" x2="-22.86" y2="71.12" width="0.1524" layer="91"/>
 <junction x="-27.94" y="71.12"/>
+<pinref part="R45" gate="G$1" pin="2"/>
 </segment>
 </net>
 <net name="V_SETT" class="0">
 <segment>
-<pinref part="V_SET" gate="G$1" pin="2"/>
 <pinref part="R2" gate="G$1" pin="1"/>
+<pinref part="V_SET" gate="G$1" pin="2"/>
 <wire x1="-33.02" y1="15.24" x2="-22.86" y2="15.24" width="0.1524" layer="91"/>
-<pinref part="C1" gate="G$1" pin="2"/>
+<pinref part="SET_TP" gate="G$1" pin="TP"/>
 <wire x1="-22.86" y1="15.24" x2="-20.32" y2="15.24" width="0.1524" layer="91"/>
+<wire x1="-20.32" y1="15.24" x2="-17.78" y2="15.24" width="0.1524" layer="91"/>
+<wire x1="-22.86" y1="20.32" x2="-22.86" y2="15.24" width="0.1524" layer="91"/>
+<junction x="-22.86" y="15.24"/>
+<pinref part="C1" gate="G$1" pin="2"/>
 <wire x1="-20.32" y1="12.7" x2="-20.32" y2="15.24" width="0.1524" layer="91"/>
 <junction x="-20.32" y="15.24"/>
-<pinref part="SET_TP" gate="G$1" pin="TP"/>
-<junction x="-22.86" y="15.24"/>
 </segment>
 </net>
 <net name="N$9" class="0">
@@ -1351,7 +1395,7 @@ to make 2 channel preamp</text>
 <pinref part="R3" gate="G$1" pin="1"/>
 <wire x1="15.24" y1="88.9" x2="17.78" y2="88.9" width="0.1524" layer="91"/>
 <pinref part="R2" gate="G$1" pin="2"/>
-<wire x1="-10.16" y1="15.24" x2="-5.08" y2="15.24" width="0.1524" layer="91"/>
+<wire x1="-7.62" y1="15.24" x2="-5.08" y2="15.24" width="0.1524" layer="91"/>
 <wire x1="-5.08" y1="15.24" x2="-5.08" y2="71.12" width="0.1524" layer="91"/>
 <pinref part="R1" gate="G$1" pin="2"/>
 <wire x1="-12.7" y1="71.12" x2="-5.08" y2="71.12" width="0.1524" layer="91"/>
@@ -1438,12 +1482,12 @@ to make 2 channel preamp</text>
 </segment>
 <segment>
 <pinref part="P+9" gate="1" pin="V+"/>
-<pinref part="PI_COMM" gate="G$1" pin="V+"/>
-<wire x1="27.94" y1="-78.74" x2="27.94" y2="-83.82" width="0.1524" layer="91"/>
+<pinref part="CH2_AMP" gate="G$1" pin="V+"/>
+<wire x1="55.88" y1="-226.06" x2="55.88" y2="-231.14" width="0.1524" layer="91"/>
 <pinref part="C15" gate="G$1" pin="1"/>
-<wire x1="27.94" y1="-83.82" x2="27.94" y2="-93.98" width="0.1524" layer="91"/>
-<wire x1="27.94" y1="-83.82" x2="30.48" y2="-83.82" width="0.1524" layer="91"/>
-<junction x="27.94" y="-83.82"/>
+<wire x1="55.88" y1="-231.14" x2="55.88" y2="-241.3" width="0.1524" layer="91"/>
+<wire x1="55.88" y1="-231.14" x2="58.42" y2="-231.14" width="0.1524" layer="91"/>
+<junction x="55.88" y="-231.14"/>
 </segment>
 <segment>
 <pinref part="P+11" gate="1" pin="V+"/>
@@ -1454,26 +1498,35 @@ to make 2 channel preamp</text>
 <junction x="104.14" y="78.74"/>
 </segment>
 <segment>
-<pinref part="SWEEP_AMP" gate="G$1" pin="V+"/>
+<pinref part="CH3_AMP" gate="G$1" pin="V+"/>
 <pinref part="P+10" gate="1" pin="V+"/>
-<wire x1="7.62" y1="-165.1" x2="7.62" y2="-157.48" width="0.1524" layer="91"/>
+<wire x1="35.56" y1="-312.42" x2="35.56" y2="-304.8" width="0.1524" layer="91"/>
 <pinref part="C20" gate="G$1" pin="1"/>
-<wire x1="7.62" y1="-157.48" x2="7.62" y2="-154.94" width="0.1524" layer="91"/>
-<wire x1="7.62" y1="-157.48" x2="12.7" y2="-157.48" width="0.1524" layer="91"/>
-<junction x="7.62" y="-157.48"/>
+<wire x1="35.56" y1="-304.8" x2="35.56" y2="-302.26" width="0.1524" layer="91"/>
+<wire x1="35.56" y1="-304.8" x2="40.64" y2="-304.8" width="0.1524" layer="91"/>
+<junction x="35.56" y="-304.8"/>
 </segment>
 <segment>
 <pinref part="P+12" gate="1" pin="V+"/>
 <pinref part="OUT_ADD" gate="G$1" pin="V+"/>
-<wire x1="101.6" y1="-147.32" x2="101.6" y2="-154.94" width="0.1524" layer="91"/>
+<wire x1="129.54" y1="-294.64" x2="129.54" y2="-302.26" width="0.1524" layer="91"/>
 <pinref part="C22" gate="G$1" pin="1"/>
-<wire x1="101.6" y1="-147.32" x2="104.14" y2="-147.32" width="0.1524" layer="91"/>
-<junction x="101.6" y="-147.32"/>
+<wire x1="129.54" y1="-294.64" x2="132.08" y2="-294.64" width="0.1524" layer="91"/>
+<junction x="129.54" y="-294.64"/>
 </segment>
 <segment>
 <pinref part="P+13" gate="1" pin="V+"/>
 <pinref part="R19" gate="G$1" pin="2"/>
-<wire x1="48.26" y1="-190.5" x2="48.26" y2="-200.66" width="0.1524" layer="91"/>
+<wire x1="76.2" y1="-337.82" x2="76.2" y2="-347.98" width="0.1524" layer="91"/>
+</segment>
+<segment>
+<pinref part="P+14" gate="1" pin="V+"/>
+<pinref part="CH1_AMP" gate="G$1" pin="V+"/>
+<wire x1="53.34" y1="-137.16" x2="53.34" y2="-142.24" width="0.1524" layer="91"/>
+<pinref part="C6" gate="G$1" pin="1"/>
+<wire x1="53.34" y1="-142.24" x2="53.34" y2="-152.4" width="0.1524" layer="91"/>
+<wire x1="53.34" y1="-142.24" x2="55.88" y2="-142.24" width="0.1524" layer="91"/>
+<junction x="53.34" y="-142.24"/>
 </segment>
 </net>
 <net name="V-" class="0">
@@ -1547,12 +1600,12 @@ to make 2 channel preamp</text>
 <junction x="256.54" y="48.26"/>
 </segment>
 <segment>
-<pinref part="PI_COMM" gate="G$1" pin="V-"/>
+<pinref part="CH2_AMP" gate="G$1" pin="V-"/>
 <pinref part="P-9" gate="1" pin="V-"/>
-<wire x1="27.94" y1="-109.22" x2="27.94" y2="-114.3" width="0.1524" layer="91"/>
-<wire x1="27.94" y1="-114.3" x2="27.94" y2="-116.84" width="0.1524" layer="91"/>
-<wire x1="30.48" y1="-114.3" x2="27.94" y2="-114.3" width="0.1524" layer="91"/>
-<junction x="27.94" y="-114.3"/>
+<wire x1="55.88" y1="-256.54" x2="55.88" y2="-261.62" width="0.1524" layer="91"/>
+<wire x1="55.88" y1="-261.62" x2="55.88" y2="-264.16" width="0.1524" layer="91"/>
+<wire x1="58.42" y1="-261.62" x2="55.88" y2="-261.62" width="0.1524" layer="91"/>
+<junction x="55.88" y="-261.62"/>
 <pinref part="C16" gate="G$1" pin="1"/>
 </segment>
 <segment>
@@ -1564,27 +1617,27 @@ to make 2 channel preamp</text>
 <junction x="104.14" y="55.88"/>
 </segment>
 <segment>
-<pinref part="SWEEP_AMP" gate="G$1" pin="V-"/>
+<pinref part="CH3_AMP" gate="G$1" pin="V-"/>
 <pinref part="P-12" gate="1" pin="V-"/>
-<wire x1="7.62" y1="-180.34" x2="7.62" y2="-182.88" width="0.1524" layer="91"/>
+<wire x1="35.56" y1="-327.66" x2="35.56" y2="-330.2" width="0.1524" layer="91"/>
 <pinref part="C21" gate="G$1" pin="1"/>
-<wire x1="7.62" y1="-182.88" x2="7.62" y2="-185.42" width="0.1524" layer="91"/>
-<wire x1="7.62" y1="-182.88" x2="12.7" y2="-182.88" width="0.1524" layer="91"/>
-<junction x="7.62" y="-182.88"/>
+<wire x1="35.56" y1="-330.2" x2="35.56" y2="-332.74" width="0.1524" layer="91"/>
+<wire x1="35.56" y1="-330.2" x2="40.64" y2="-330.2" width="0.1524" layer="91"/>
+<junction x="35.56" y="-330.2"/>
 </segment>
 <segment>
 <pinref part="OUT_ADD" gate="G$1" pin="V-"/>
 <pinref part="P-11" gate="1" pin="V-"/>
-<wire x1="101.6" y1="-170.18" x2="101.6" y2="-172.72" width="0.1524" layer="91"/>
+<wire x1="129.54" y1="-317.5" x2="129.54" y2="-320.04" width="0.1524" layer="91"/>
 <pinref part="C23" gate="G$1" pin="1"/>
-<wire x1="101.6" y1="-172.72" x2="101.6" y2="-175.26" width="0.1524" layer="91"/>
-<wire x1="101.6" y1="-172.72" x2="104.14" y2="-172.72" width="0.1524" layer="91"/>
-<junction x="101.6" y="-172.72"/>
+<wire x1="129.54" y1="-320.04" x2="129.54" y2="-322.58" width="0.1524" layer="91"/>
+<wire x1="129.54" y1="-320.04" x2="132.08" y2="-320.04" width="0.1524" layer="91"/>
+<junction x="129.54" y="-320.04"/>
 </segment>
 <segment>
 <pinref part="R20" gate="G$1" pin="1"/>
 <pinref part="P-13" gate="1" pin="V-"/>
-<wire x1="48.26" y1="-236.22" x2="48.26" y2="-238.76" width="0.1524" layer="91"/>
+<wire x1="76.2" y1="-383.54" x2="76.2" y2="-386.08" width="0.1524" layer="91"/>
 </segment>
 <segment>
 <pinref part="BUFFER" gate="G$1" pin="V-"/>
@@ -1594,6 +1647,15 @@ to make 2 channel preamp</text>
 <wire x1="-48.26" y1="55.88" x2="-48.26" y2="50.8" width="0.1524" layer="91"/>
 <junction x="-48.26" y="55.88"/>
 </segment>
+<segment>
+<pinref part="CH1_AMP" gate="G$1" pin="V-"/>
+<pinref part="P-14" gate="1" pin="V-"/>
+<wire x1="53.34" y1="-167.64" x2="53.34" y2="-172.72" width="0.1524" layer="91"/>
+<wire x1="53.34" y1="-172.72" x2="53.34" y2="-175.26" width="0.1524" layer="91"/>
+<wire x1="55.88" y1="-172.72" x2="53.34" y2="-172.72" width="0.1524" layer="91"/>
+<junction x="53.34" y="-172.72"/>
+<pinref part="C27" gate="G$1" pin="1"/>
+</segment>
 </net>
 <net name="R5" class="0">
 <segment>
@@ -1619,7 +1681,7 @@ to make 2 channel preamp</text>
 </segment>
 <segment>
 <pinref part="SUPPLY4" gate="1" pin="GND"/>
-<pinref part="ERROR/CH1" gate="." pin="SHIELD1"/>
+<pinref part="ERROR/CH2" gate="." pin="SHIELD1"/>
 <wire x1="60.96" y1="-5.08" x2="60.96" y2="0" width="0.1524" layer="91"/>
 </segment>
 <segment>
@@ -1654,12 +1716,12 @@ to make 2 channel preamp</text>
 <segment>
 <pinref part="OUTPUT" gate="." pin="SHIELD1"/>
 <pinref part="SUPPLY13" gate="1" pin="GND"/>
-<wire x1="144.78" y1="-162.56" x2="144.78" y2="-167.64" width="0.1524" layer="91"/>
+<wire x1="172.72" y1="-309.88" x2="172.72" y2="-314.96" width="0.1524" layer="91"/>
 </segment>
 <segment>
 <pinref part="C19" gate="G$1" pin="1"/>
 <pinref part="SUPPLY15" gate="1" pin="GND"/>
-<wire x1="63.5" y1="-228.6" x2="63.5" y2="-233.68" width="0.1524" layer="91"/>
+<wire x1="91.44" y1="-375.92" x2="91.44" y2="-381" width="0.1524" layer="91"/>
 </segment>
 <segment>
 <pinref part="C0" gate="G$1" pin="2"/>
@@ -1727,12 +1789,12 @@ to make 2 channel preamp</text>
 <segment>
 <pinref part="C23" gate="G$1" pin="2"/>
 <pinref part="SUPPLY30" gate="1" pin="GND"/>
-<wire x1="109.22" y1="-172.72" x2="114.3" y2="-172.72" width="0.1524" layer="91"/>
+<wire x1="137.16" y1="-320.04" x2="142.24" y2="-320.04" width="0.1524" layer="91"/>
 </segment>
 <segment>
 <pinref part="C22" gate="G$1" pin="2"/>
 <pinref part="SUPPLY29" gate="1" pin="GND"/>
-<wire x1="109.22" y1="-147.32" x2="114.3" y2="-147.32" width="0.1524" layer="91"/>
+<wire x1="137.16" y1="-294.64" x2="142.24" y2="-294.64" width="0.1524" layer="91"/>
 </segment>
 <segment>
 <pinref part="C3" gate="G$1" pin="2"/>
@@ -1748,30 +1810,30 @@ to make 2 channel preamp</text>
 <segment>
 <pinref part="C20" gate="G$1" pin="2"/>
 <pinref part="SUPPLY33" gate="1" pin="GND"/>
-<wire x1="17.78" y1="-157.48" x2="22.86" y2="-157.48" width="0.1524" layer="91"/>
-<wire x1="22.86" y1="-157.48" x2="22.86" y2="-160.02" width="0.1524" layer="91"/>
+<wire x1="45.72" y1="-304.8" x2="50.8" y2="-304.8" width="0.1524" layer="91"/>
+<wire x1="50.8" y1="-304.8" x2="50.8" y2="-307.34" width="0.1524" layer="91"/>
 </segment>
 <segment>
 <pinref part="C21" gate="G$1" pin="2"/>
 <pinref part="SUPPLY32" gate="1" pin="GND"/>
-<wire x1="17.78" y1="-182.88" x2="22.86" y2="-182.88" width="0.1524" layer="91"/>
-<wire x1="22.86" y1="-182.88" x2="22.86" y2="-185.42" width="0.1524" layer="91"/>
+<wire x1="45.72" y1="-330.2" x2="50.8" y2="-330.2" width="0.1524" layer="91"/>
+<wire x1="50.8" y1="-330.2" x2="50.8" y2="-332.74" width="0.1524" layer="91"/>
 </segment>
 <segment>
 <pinref part="C15" gate="G$1" pin="2"/>
 <pinref part="SUPPLY35" gate="1" pin="GND"/>
-<wire x1="35.56" y1="-83.82" x2="40.64" y2="-83.82" width="0.1524" layer="91"/>
-<wire x1="40.64" y1="-83.82" x2="40.64" y2="-88.9" width="0.1524" layer="91"/>
+<wire x1="63.5" y1="-231.14" x2="68.58" y2="-231.14" width="0.1524" layer="91"/>
+<wire x1="68.58" y1="-231.14" x2="68.58" y2="-236.22" width="0.1524" layer="91"/>
 </segment>
 <segment>
 <pinref part="INPUT" gate="." pin="SHIELD1"/>
 <pinref part="SUPPLY16" gate="1" pin="GND"/>
-<wire x1="-73.66" y1="60.96" x2="-73.66" y2="55.88" width="0.1524" layer="91"/>
+<wire x1="-83.82" y1="60.96" x2="-83.82" y2="55.88" width="0.1524" layer="91"/>
 </segment>
 <segment>
-<pinref part="SWEEP/CH2" gate="." pin="SHIELD1"/>
+<pinref part="SWEEP/CH3" gate="." pin="SHIELD1"/>
 <pinref part="SUPPLY12" gate="1" pin="GND"/>
-<wire x1="-30.48" y1="-175.26" x2="-30.48" y2="-180.34" width="0.1524" layer="91"/>
+<wire x1="-2.54" y1="-322.58" x2="-2.54" y2="-327.66" width="0.1524" layer="91"/>
 </segment>
 <segment>
 <pinref part="R27" gate="G$1" pin="1"/>
@@ -1796,12 +1858,12 @@ to make 2 channel preamp</text>
 <segment>
 <pinref part="R33" gate="G$1" pin="1"/>
 <pinref part="SUPPLY10" gate="1" pin="GND"/>
-<wire x1="-2.54" y1="-187.96" x2="-2.54" y2="-193.04" width="0.1524" layer="91"/>
+<wire x1="25.4" y1="-335.28" x2="25.4" y2="-340.36" width="0.1524" layer="91"/>
 </segment>
 <segment>
 <pinref part="R34" gate="G$1" pin="1"/>
 <pinref part="SUPPLY14" gate="1" pin="GND"/>
-<wire x1="96.52" y1="-177.8" x2="96.52" y2="-185.42" width="0.1524" layer="91"/>
+<wire x1="124.46" y1="-325.12" x2="124.46" y2="-332.74" width="0.1524" layer="91"/>
 </segment>
 <segment>
 <pinref part="R26" gate="G$1" pin="1"/>
@@ -1817,13 +1879,13 @@ to make 2 channel preamp</text>
 <segment>
 <pinref part="R30" gate="G$1" pin="1"/>
 <pinref part="SUPPLY37" gate="1" pin="GND"/>
-<wire x1="15.24" y1="-116.84" x2="15.24" y2="-121.92" width="0.1524" layer="91"/>
+<wire x1="43.18" y1="-264.16" x2="43.18" y2="-269.24" width="0.1524" layer="91"/>
 </segment>
 <segment>
 <pinref part="C16" gate="G$1" pin="2"/>
-<wire x1="35.56" y1="-114.3" x2="40.64" y2="-114.3" width="0.1524" layer="91"/>
+<wire x1="63.5" y1="-261.62" x2="68.58" y2="-261.62" width="0.1524" layer="91"/>
 <pinref part="SUPPLY38" gate="1" pin="GND"/>
-<wire x1="40.64" y1="-114.3" x2="40.64" y2="-121.92" width="0.1524" layer="91"/>
+<wire x1="68.58" y1="-261.62" x2="68.58" y2="-269.24" width="0.1524" layer="91"/>
 </segment>
 <segment>
 <pinref part="SUPPLY36" gate="1" pin="GND"/>
@@ -1838,8 +1900,37 @@ to make 2 channel preamp</text>
 <segment>
 <pinref part="PI_OUT" gate="G$1" pin="2"/>
 <pinref part="SUPPLY39" gate="1" pin="GND"/>
-<wire x1="-12.7" y1="-109.22" x2="-20.32" y2="-109.22" width="0.1524" layer="91"/>
-<wire x1="-20.32" y1="-109.22" x2="-20.32" y2="-116.84" width="0.1524" layer="91"/>
+<wire x1="322.58" y1="-5.08" x2="320.04" y2="-5.08" width="0.1524" layer="91"/>
+<wire x1="320.04" y1="-5.08" x2="320.04" y2="-12.7" width="0.1524" layer="91"/>
+</segment>
+<segment>
+<pinref part="C6" gate="G$1" pin="2"/>
+<pinref part="SUPPLY40" gate="1" pin="GND"/>
+<wire x1="60.96" y1="-142.24" x2="66.04" y2="-142.24" width="0.1524" layer="91"/>
+<wire x1="66.04" y1="-142.24" x2="66.04" y2="-147.32" width="0.1524" layer="91"/>
+</segment>
+<segment>
+<pinref part="R41" gate="G$1" pin="1"/>
+<pinref part="SUPPLY41" gate="1" pin="GND"/>
+<wire x1="40.64" y1="-175.26" x2="40.64" y2="-180.34" width="0.1524" layer="91"/>
+</segment>
+<segment>
+<pinref part="C27" gate="G$1" pin="2"/>
+<wire x1="60.96" y1="-172.72" x2="66.04" y2="-172.72" width="0.1524" layer="91"/>
+<pinref part="SUPPLY42" gate="1" pin="GND"/>
+<wire x1="66.04" y1="-172.72" x2="66.04" y2="-180.34" width="0.1524" layer="91"/>
+</segment>
+<segment>
+<pinref part="CH1/DITHER_IN" gate="G$1" pin="2"/>
+<pinref part="SUPPLY43" gate="1" pin="GND"/>
+<wire x1="-12.7" y1="-167.64" x2="5.08" y2="-167.64" width="0.1524" layer="91"/>
+<wire x1="5.08" y1="-167.64" x2="5.08" y2="-175.26" width="0.1524" layer="91"/>
+</segment>
+<segment>
+<pinref part="SUPPLY44" gate="1" pin="GND"/>
+<wire x1="-73.66" y1="88.9" x2="-73.66" y2="91.44" width="0.1524" layer="91"/>
+<pinref part="R44" gate="G$1" pin="1"/>
+<wire x1="-73.66" y1="91.44" x2="-71.12" y2="91.44" width="0.1524" layer="91"/>
 </segment>
 </net>
 <net name="N$2" class="0">
@@ -1964,36 +2055,36 @@ to make 2 channel preamp</text>
 <pinref part="PI" gate="G$1" pin="TP"/>
 <junction x="299.72" y="12.7"/>
 <pinref part="R37" gate="G$1" pin="2"/>
-<wire x1="312.42" y1="12.7" x2="302.26" y2="12.7" width="0.1524" layer="91"/>
+<wire x1="307.34" y1="12.7" x2="302.26" y2="12.7" width="0.1524" layer="91"/>
 </segment>
 </net>
 <net name="COMMON_GAIN" class="0">
 <segment>
 <pinref part="R14" gate="G$1" pin="2"/>
-<pinref part="PI_COMM" gate="G$1" pin="-IN"/>
-<wire x1="17.78" y1="-99.06" x2="20.32" y2="-99.06" width="0.1524" layer="91"/>
-<wire x1="20.32" y1="-99.06" x2="22.86" y2="-99.06" width="0.1524" layer="91"/>
-<wire x1="20.32" y1="-99.06" x2="20.32" y2="-63.5" width="0.1524" layer="91"/>
-<junction x="20.32" y="-99.06"/>
-<pinref part="COMMON_GAIN" gate="G$1" pin="1"/>
-<wire x1="25.4" y1="-63.5" x2="20.32" y2="-63.5" width="0.1524" layer="91"/>
+<pinref part="CH2_AMP" gate="G$1" pin="-IN"/>
+<wire x1="45.72" y1="-246.38" x2="48.26" y2="-246.38" width="0.1524" layer="91"/>
+<wire x1="48.26" y1="-246.38" x2="50.8" y2="-246.38" width="0.1524" layer="91"/>
+<wire x1="48.26" y1="-246.38" x2="48.26" y2="-210.82" width="0.1524" layer="91"/>
+<junction x="48.26" y="-246.38"/>
+<pinref part="CH2_GAIN" gate="G$1" pin="1"/>
+<wire x1="53.34" y1="-210.82" x2="48.26" y2="-210.82" width="0.1524" layer="91"/>
 </segment>
 </net>
 <net name="N$21" class="0">
 <segment>
-<pinref part="COMMON_GAIN" gate="G$1" pin="2"/>
-<wire x1="30.48" y1="-63.5" x2="30.48" y2="-68.58" width="0.1524" layer="91"/>
-<wire x1="30.48" y1="-68.58" x2="48.26" y2="-68.58" width="0.1524" layer="91"/>
-<pinref part="PI_COMM" gate="G$1" pin="OUT"/>
-<wire x1="48.26" y1="-68.58" x2="48.26" y2="-101.6" width="0.1524" layer="91"/>
-<wire x1="48.26" y1="-101.6" x2="38.1" y2="-101.6" width="0.1524" layer="91"/>
+<pinref part="CH2_GAIN" gate="G$1" pin="2"/>
+<wire x1="58.42" y1="-210.82" x2="58.42" y2="-215.9" width="0.1524" layer="91"/>
+<wire x1="58.42" y1="-215.9" x2="76.2" y2="-215.9" width="0.1524" layer="91"/>
+<pinref part="CH2_AMP" gate="G$1" pin="OUT"/>
+<wire x1="76.2" y1="-215.9" x2="76.2" y2="-248.92" width="0.1524" layer="91"/>
+<wire x1="76.2" y1="-248.92" x2="66.04" y2="-248.92" width="0.1524" layer="91"/>
 <pinref part="R17" gate="G$1" pin="1"/>
-<wire x1="55.88" y1="-101.6" x2="53.34" y2="-101.6" width="0.1524" layer="91"/>
-<junction x="48.26" y="-101.6"/>
-<pinref part="V_COM" gate="G$1" pin="TP"/>
-<wire x1="53.34" y1="-101.6" x2="48.26" y2="-101.6" width="0.1524" layer="91"/>
-<wire x1="53.34" y1="-99.06" x2="53.34" y2="-101.6" width="0.1524" layer="91"/>
-<junction x="53.34" y="-101.6"/>
+<wire x1="83.82" y1="-248.92" x2="81.28" y2="-248.92" width="0.1524" layer="91"/>
+<junction x="76.2" y="-248.92"/>
+<pinref part="CH2_OUT" gate="G$1" pin="TP"/>
+<wire x1="81.28" y1="-248.92" x2="76.2" y2="-248.92" width="0.1524" layer="91"/>
+<wire x1="81.28" y1="-246.38" x2="81.28" y2="-248.92" width="0.1524" layer="91"/>
+<junction x="81.28" y="-248.92"/>
 </segment>
 </net>
 <net name="N$22" class="0">
@@ -2023,8 +2114,13 @@ to make 2 channel preamp</text>
 <wire x1="137.16" y1="66.04" x2="147.32" y2="66.04" width="0.1524" layer="91"/>
 <pinref part="R4" gate="G$1" pin="1"/>
 <pinref part="P_GAIN" gate="G$1" pin="3"/>
-<wire x1="137.16" y1="15.24" x2="137.16" y2="66.04" width="0.1524" layer="91"/>
+<wire x1="137.16" y1="15.24" x2="137.16" y2="27.94" width="0.1524" layer="91"/>
 <junction x="137.16" y="66.04"/>
+<pinref part="R38" gate="G$1" pin="1"/>
+<wire x1="137.16" y1="27.94" x2="137.16" y2="66.04" width="0.1524" layer="91"/>
+<wire x1="116.84" y1="2.54" x2="116.84" y2="27.94" width="0.1524" layer="91"/>
+<wire x1="116.84" y1="27.94" x2="137.16" y2="27.94" width="0.1524" layer="91"/>
+<junction x="137.16" y="27.94"/>
 </segment>
 </net>
 <net name="N$24" class="0">
@@ -2039,128 +2135,112 @@ to make 2 channel preamp</text>
 <net name="N$27" class="0">
 <segment>
 <pinref part="R23" gate="G$1" pin="2"/>
-<pinref part="SWEEP_AMP" gate="G$1" pin="-IN"/>
-<wire x1="-7.62" y1="-170.18" x2="2.54" y2="-170.18" width="0.1524" layer="91"/>
-<wire x1="2.54" y1="-170.18" x2="0" y2="-170.18" width="0.1524" layer="91"/>
-<wire x1="0" y1="-170.18" x2="0" y2="-144.78" width="0.1524" layer="91"/>
-<junction x="2.54" y="-170.18"/>
-<pinref part="SWEEP_GAIN" gate="G$1" pin="1"/>
-<wire x1="0" y1="-144.78" x2="5.08" y2="-144.78" width="0.1524" layer="91"/>
+<pinref part="CH3_AMP" gate="G$1" pin="-IN"/>
+<wire x1="20.32" y1="-317.5" x2="30.48" y2="-317.5" width="0.1524" layer="91"/>
+<wire x1="30.48" y1="-317.5" x2="27.94" y2="-317.5" width="0.1524" layer="91"/>
+<wire x1="27.94" y1="-317.5" x2="27.94" y2="-292.1" width="0.1524" layer="91"/>
+<junction x="30.48" y="-317.5"/>
+<pinref part="CH3_GAIN" gate="G$1" pin="1"/>
+<wire x1="27.94" y1="-292.1" x2="33.02" y2="-292.1" width="0.1524" layer="91"/>
 </segment>
 </net>
 <net name="C_MOD+" class="0">
 <segment>
-<pinref part="SWEEP_GAIN" gate="G$1" pin="2"/>
-<wire x1="10.16" y1="-144.78" x2="10.16" y2="-147.32" width="0.1524" layer="91"/>
-<wire x1="10.16" y1="-147.32" x2="30.48" y2="-147.32" width="0.1524" layer="91"/>
-<wire x1="30.48" y1="-147.32" x2="30.48" y2="-172.72" width="0.1524" layer="91"/>
-<pinref part="SWEEP_AMP" gate="G$1" pin="OUT"/>
-<wire x1="30.48" y1="-172.72" x2="17.78" y2="-172.72" width="0.1524" layer="91"/>
+<pinref part="CH3_GAIN" gate="G$1" pin="2"/>
+<wire x1="38.1" y1="-292.1" x2="38.1" y2="-294.64" width="0.1524" layer="91"/>
+<wire x1="38.1" y1="-294.64" x2="58.42" y2="-294.64" width="0.1524" layer="91"/>
+<wire x1="58.42" y1="-294.64" x2="58.42" y2="-320.04" width="0.1524" layer="91"/>
+<pinref part="CH3_AMP" gate="G$1" pin="OUT"/>
+<wire x1="58.42" y1="-320.04" x2="45.72" y2="-320.04" width="0.1524" layer="91"/>
 <pinref part="R18" gate="G$1" pin="1"/>
-<wire x1="30.48" y1="-172.72" x2="35.56" y2="-172.72" width="0.1524" layer="91"/>
-<junction x="30.48" y="-172.72"/>
-<pinref part="SWP" gate="G$1" pin="TP"/>
-<wire x1="35.56" y1="-172.72" x2="45.72" y2="-172.72" width="0.1524" layer="91"/>
-<junction x="35.56" y="-172.72"/>
+<wire x1="58.42" y1="-320.04" x2="63.5" y2="-320.04" width="0.1524" layer="91"/>
+<junction x="58.42" y="-320.04"/>
+<pinref part="CH3_OUT" gate="G$1" pin="TP"/>
+<wire x1="63.5" y1="-320.04" x2="73.66" y2="-320.04" width="0.1524" layer="91"/>
+<junction x="63.5" y="-320.04"/>
 </segment>
 </net>
 <net name="OUTPUT_ROFF" class="0">
 <segment>
 <pinref part="R21" gate="G$1" pin="1"/>
-<pinref part="C19" gate="G$1" pin="2"/>
-<wire x1="55.88" y1="-218.44" x2="63.5" y2="-218.44" width="0.1524" layer="91"/>
-<wire x1="63.5" y1="-218.44" x2="63.5" y2="-223.52" width="0.1524" layer="91"/>
-<junction x="63.5" y="-218.44"/>
+<wire x1="83.82" y1="-365.76" x2="91.44" y2="-365.76" width="0.1524" layer="91"/>
 <pinref part="V_OFF" gate="G$1" pin="TP"/>
 <pinref part="OFFSET" gate="G$1" pin="2"/>
-<wire x1="48.26" y1="-218.44" x2="55.88" y2="-218.44" width="0.1524" layer="91"/>
-<junction x="55.88" y="-218.44"/>
-</segment>
-</net>
-<net name="N$31" class="0">
-<segment>
-<pinref part="R21" gate="G$1" pin="2"/>
-<wire x1="73.66" y1="-218.44" x2="86.36" y2="-218.44" width="0.1524" layer="91"/>
-<wire x1="86.36" y1="-218.44" x2="86.36" y2="-170.18" width="0.1524" layer="91"/>
-<pinref part="OUT_ADD" gate="G$1" pin="-IN"/>
-<wire x1="86.36" y1="-170.18" x2="86.36" y2="-160.02" width="0.1524" layer="91"/>
-<wire x1="86.36" y1="-160.02" x2="96.52" y2="-160.02" width="0.1524" layer="91"/>
-<junction x="86.36" y="-160.02"/>
-<pinref part="R22" gate="G$1" pin="1"/>
-<wire x1="93.98" y1="-132.08" x2="86.36" y2="-132.08" width="0.1524" layer="91"/>
-<wire x1="86.36" y1="-132.08" x2="86.36" y2="-160.02" width="0.1524" layer="91"/>
-<pinref part="FEEDBACK" gate="G$1" pin="2"/>
-<wire x1="78.74" y1="-170.18" x2="81.28" y2="-170.18" width="0.1524" layer="91"/>
-<junction x="86.36" y="-170.18"/>
-<pinref part="R36" gate="G$1" pin="2"/>
-<wire x1="81.28" y1="-170.18" x2="86.36" y2="-170.18" width="0.1524" layer="91"/>
-<wire x1="81.28" y1="-157.48" x2="81.28" y2="-170.18" width="0.1524" layer="91"/>
-<junction x="81.28" y="-170.18"/>
-<pinref part="R35" gate="G$1" pin="2"/>
-<wire x1="81.28" y1="-185.42" x2="81.28" y2="-170.18" width="0.1524" layer="91"/>
+<wire x1="91.44" y1="-365.76" x2="96.52" y2="-365.76" width="0.1524" layer="91"/>
+<wire x1="76.2" y1="-365.76" x2="83.82" y2="-365.76" width="0.1524" layer="91"/>
+<junction x="83.82" y="-365.76"/>
+<pinref part="C19" gate="G$1" pin="2"/>
+<wire x1="91.44" y1="-370.84" x2="91.44" y2="-365.76" width="0.1524" layer="91"/>
+<junction x="91.44" y="-365.76"/>
 </segment>
 </net>
 <net name="N$33" class="0">
 <segment>
 <pinref part="R22" gate="G$1" pin="2"/>
-<wire x1="104.14" y1="-132.08" x2="119.38" y2="-132.08" width="0.1524" layer="91"/>
-<wire x1="119.38" y1="-132.08" x2="119.38" y2="-157.48" width="0.1524" layer="91"/>
+<wire x1="134.62" y1="-279.4" x2="147.32" y2="-279.4" width="0.1524" layer="91"/>
+<wire x1="147.32" y1="-279.4" x2="147.32" y2="-304.8" width="0.1524" layer="91"/>
 <pinref part="OUT_ADD" gate="G$1" pin="OUT"/>
-<wire x1="119.38" y1="-157.48" x2="119.38" y2="-162.56" width="0.1524" layer="91"/>
-<wire x1="119.38" y1="-162.56" x2="111.76" y2="-162.56" width="0.1524" layer="91"/>
+<wire x1="147.32" y1="-304.8" x2="147.32" y2="-309.88" width="0.1524" layer="91"/>
+<wire x1="147.32" y1="-309.88" x2="139.7" y2="-309.88" width="0.1524" layer="91"/>
 <pinref part="OUTPUT" gate="." pin="CONDUCTOR"/>
-<wire x1="139.7" y1="-157.48" x2="127" y2="-157.48" width="0.1524" layer="91"/>
-<junction x="119.38" y="-157.48"/>
+<wire x1="167.64" y1="-304.8" x2="154.94" y2="-304.8" width="0.1524" layer="91"/>
+<junction x="147.32" y="-304.8"/>
 <pinref part="OUT_TP" gate="G$1" pin="TP"/>
-<wire x1="127" y1="-157.48" x2="119.38" y2="-157.48" width="0.1524" layer="91"/>
-<junction x="127" y="-157.48"/>
+<wire x1="154.94" y1="-304.8" x2="147.32" y2="-304.8" width="0.1524" layer="91"/>
+<junction x="154.94" y="-304.8"/>
 </segment>
 </net>
 <net name="N$3" class="0">
 <segment>
-<pinref part="BUFFER" gate="G$1" pin="+IN"/>
 <pinref part="IN" gate="G$1" pin="TP"/>
-<wire x1="-60.96" y1="66.04" x2="-53.34" y2="66.04" width="0.1524" layer="91"/>
-<wire x1="-60.96" y1="68.58" x2="-60.96" y2="66.04" width="0.1524" layer="91"/>
+<wire x1="-76.2" y1="66.04" x2="-73.66" y2="66.04" width="0.1524" layer="91"/>
+<wire x1="-73.66" y1="66.04" x2="-71.12" y2="66.04" width="0.1524" layer="91"/>
+<wire x1="-76.2" y1="71.12" x2="-76.2" y2="66.04" width="0.1524" layer="91"/>
 <pinref part="INPUT" gate="." pin="CONDUCTOR"/>
-<wire x1="-68.58" y1="66.04" x2="-60.96" y2="66.04" width="0.1524" layer="91"/>
-<junction x="-60.96" y="66.04"/>
+<wire x1="-78.74" y1="66.04" x2="-76.2" y2="66.04" width="0.1524" layer="91"/>
+<junction x="-76.2" y="66.04"/>
+<pinref part="R42" gate="G$1" pin="1"/>
+<pinref part="R43" gate="G$1" pin="2"/>
+<wire x1="-73.66" y1="55.88" x2="-73.66" y2="66.04" width="0.1524" layer="91"/>
+<junction x="-73.66" y="66.04"/>
 </segment>
 </net>
 <net name="N$4" class="0">
 <segment>
 <pinref part="R5" gate="G$1" pin="2"/>
-<pinref part="ERROR/CH1" gate="." pin="CONDUCTOR"/>
+<pinref part="ERROR/CH2" gate="." pin="CONDUCTOR"/>
 <wire x1="45.72" y1="33.02" x2="45.72" y2="5.08" width="0.1524" layer="91"/>
 <wire x1="45.72" y1="5.08" x2="55.88" y2="5.08" width="0.1524" layer="91"/>
-<pinref part="R38" gate="G$1" pin="1"/>
-<wire x1="45.72" y1="0" x2="45.72" y2="5.08" width="0.1524" layer="91"/>
-<junction x="45.72" y="5.08"/>
 </segment>
 </net>
-<net name="N$6" class="0">
+<net name="CH3_IN" class="0">
 <segment>
-<pinref part="SWEEP/CH2" gate="." pin="CONDUCTOR"/>
+<pinref part="SWEEP/CH3" gate="." pin="CONDUCTOR"/>
 <pinref part="R23" gate="G$1" pin="1"/>
-<wire x1="-25.4" y1="-170.18" x2="-20.32" y2="-170.18" width="0.1524" layer="91"/>
-<wire x1="-20.32" y1="-170.18" x2="-17.78" y2="-170.18" width="0.1524" layer="91"/>
-<junction x="-20.32" y="-170.18"/>
-<pinref part="V_MODIN" gate="G$1" pin="TP"/>
-<wire x1="-20.32" y1="-165.1" x2="-20.32" y2="-170.18" width="0.1524" layer="91"/>
+<wire x1="2.54" y1="-317.5" x2="5.08" y2="-317.5" width="0.1524" layer="91"/>
+<wire x1="5.08" y1="-317.5" x2="7.62" y2="-317.5" width="0.1524" layer="91"/>
+<wire x1="7.62" y1="-317.5" x2="10.16" y2="-317.5" width="0.1524" layer="91"/>
+<junction x="7.62" y="-317.5"/>
+<pinref part="CH3_IN" gate="G$1" pin="TP"/>
+<wire x1="7.62" y1="-312.42" x2="7.62" y2="-317.5" width="0.1524" layer="91"/>
+<label x="-7.62" y="-302.26" size="2.54" layer="95" rot="R180" xref="yes"/>
+<wire x1="5.08" y1="-317.5" x2="5.08" y2="-302.26" width="0.1524" layer="91"/>
+<junction x="5.08" y="-317.5"/>
+<wire x1="5.08" y1="-302.26" x2="-7.62" y2="-302.26" width="0.1524" layer="91"/>
 </segment>
 </net>
 <net name="N$12" class="0">
 <segment>
 <pinref part="OFFSET" gate="G$1" pin="3"/>
 <pinref part="R19" gate="G$1" pin="1"/>
-<wire x1="48.26" y1="-213.36" x2="48.26" y2="-210.82" width="0.1524" layer="91"/>
+<wire x1="76.2" y1="-360.68" x2="76.2" y2="-358.14" width="0.1524" layer="91"/>
 </segment>
 </net>
 <net name="N$23" class="0">
 <segment>
 <pinref part="OFFSET" gate="G$1" pin="1"/>
 <pinref part="R20" gate="G$1" pin="2"/>
-<wire x1="48.26" y1="-223.52" x2="48.26" y2="-226.06" width="0.1524" layer="91"/>
+<wire x1="76.2" y1="-370.84" x2="76.2" y2="-373.38" width="0.1524" layer="91"/>
 </segment>
 </net>
 <net name="N$5" class="0">
@@ -2216,48 +2296,48 @@ to make 2 channel preamp</text>
 <net name="N$29" class="0">
 <segment>
 <pinref part="R33" gate="G$1" pin="2"/>
-<pinref part="SWEEP_AMP" gate="G$1" pin="+IN"/>
-<wire x1="-2.54" y1="-177.8" x2="-2.54" y2="-175.26" width="0.1524" layer="91"/>
-<wire x1="-2.54" y1="-175.26" x2="2.54" y2="-175.26" width="0.1524" layer="91"/>
+<pinref part="CH3_AMP" gate="G$1" pin="+IN"/>
+<wire x1="25.4" y1="-325.12" x2="25.4" y2="-322.58" width="0.1524" layer="91"/>
+<wire x1="25.4" y1="-322.58" x2="30.48" y2="-322.58" width="0.1524" layer="91"/>
 </segment>
 </net>
 <net name="N$30" class="0">
 <segment>
 <pinref part="OUT_ADD" gate="G$1" pin="+IN"/>
 <pinref part="R34" gate="G$1" pin="2"/>
-<wire x1="96.52" y1="-165.1" x2="96.52" y2="-167.64" width="0.1524" layer="91"/>
+<wire x1="124.46" y1="-312.42" x2="124.46" y2="-314.96" width="0.1524" layer="91"/>
 </segment>
 </net>
 <net name="N$35" class="0">
 <segment>
-<pinref part="PI_COMM" gate="G$1" pin="+IN"/>
-<wire x1="22.86" y1="-104.14" x2="15.24" y2="-104.14" width="0.1524" layer="91"/>
+<pinref part="CH2_AMP" gate="G$1" pin="+IN"/>
+<wire x1="50.8" y1="-251.46" x2="43.18" y2="-251.46" width="0.1524" layer="91"/>
 <pinref part="R30" gate="G$1" pin="2"/>
-<wire x1="15.24" y1="-104.14" x2="15.24" y2="-106.68" width="0.1524" layer="91"/>
+<wire x1="43.18" y1="-251.46" x2="43.18" y2="-254" width="0.1524" layer="91"/>
 </segment>
 </net>
 <net name="N$10" class="0">
 <segment>
 <pinref part="FEEDBACK" gate="G$1" pin="3"/>
-<wire x1="66.04" y1="-101.6" x2="68.58" y2="-101.6" width="0.1524" layer="91"/>
-<wire x1="68.58" y1="-101.6" x2="68.58" y2="-157.48" width="0.1524" layer="91"/>
+<wire x1="93.98" y1="-248.92" x2="96.52" y2="-248.92" width="0.1524" layer="91"/>
+<wire x1="96.52" y1="-248.92" x2="96.52" y2="-304.8" width="0.1524" layer="91"/>
 <pinref part="R17" gate="G$1" pin="2"/>
 <pinref part="R36" gate="G$1" pin="1"/>
-<wire x1="68.58" y1="-157.48" x2="68.58" y2="-167.64" width="0.1524" layer="91"/>
-<wire x1="71.12" y1="-157.48" x2="68.58" y2="-157.48" width="0.1524" layer="91"/>
-<junction x="68.58" y="-157.48"/>
+<wire x1="96.52" y1="-304.8" x2="96.52" y2="-314.96" width="0.1524" layer="91"/>
+<wire x1="99.06" y1="-304.8" x2="96.52" y2="-304.8" width="0.1524" layer="91"/>
+<junction x="96.52" y="-304.8"/>
 </segment>
 </net>
 <net name="N$8" class="0">
 <segment>
 <pinref part="FEEDBACK" gate="G$1" pin="1"/>
 <pinref part="R18" gate="G$1" pin="2"/>
-<wire x1="55.88" y1="-172.72" x2="60.96" y2="-172.72" width="0.1524" layer="91"/>
+<wire x1="83.82" y1="-320.04" x2="88.9" y2="-320.04" width="0.1524" layer="91"/>
 <pinref part="R35" gate="G$1" pin="1"/>
-<wire x1="60.96" y1="-172.72" x2="68.58" y2="-172.72" width="0.1524" layer="91"/>
-<wire x1="71.12" y1="-185.42" x2="60.96" y2="-185.42" width="0.1524" layer="91"/>
-<wire x1="60.96" y1="-185.42" x2="60.96" y2="-172.72" width="0.1524" layer="91"/>
-<junction x="60.96" y="-172.72"/>
+<wire x1="88.9" y1="-320.04" x2="96.52" y2="-320.04" width="0.1524" layer="91"/>
+<wire x1="99.06" y1="-332.74" x2="88.9" y2="-332.74" width="0.1524" layer="91"/>
+<wire x1="88.9" y1="-332.74" x2="88.9" y2="-320.04" width="0.1524" layer="91"/>
+<junction x="88.9" y="-320.04"/>
 </segment>
 </net>
 <net name="N$34" class="0">
@@ -2297,25 +2377,135 @@ to make 2 channel preamp</text>
 <wire x1="45.72" y1="43.18" x2="45.72" y2="68.58" width="0.1524" layer="91"/>
 </segment>
 </net>
-<net name="CH1_IN" class="0">
+<net name="CH2_IN" class="0">
 <segment>
 <pinref part="R14" gate="G$1" pin="1"/>
-<wire x1="-20.32" y1="-99.06" x2="7.62" y2="-99.06" width="0.1524" layer="91"/>
-<pinref part="PI_OUT" gate="G$1" pin="1"/>
-<wire x1="-12.7" y1="-106.68" x2="-20.32" y2="-106.68" width="0.1524" layer="91"/>
-<wire x1="-20.32" y1="-106.68" x2="-20.32" y2="-99.06" width="0.1524" layer="91"/>
-<label x="-20.32" y="-99.06" size="1.778" layer="95" rot="R180" xref="yes"/>
+<wire x1="7.62" y1="-246.38" x2="12.7" y2="-246.38" width="0.1524" layer="91"/>
+<label x="7.62" y="-246.38" size="2.54" layer="95" rot="R180" xref="yes"/>
+<pinref part="CH2_IN" gate="G$1" pin="TP"/>
+<wire x1="12.7" y1="-246.38" x2="35.56" y2="-246.38" width="0.1524" layer="91"/>
+<wire x1="12.7" y1="-238.76" x2="12.7" y2="-246.38" width="0.1524" layer="91"/>
+<junction x="12.7" y="-246.38"/>
 </segment>
 <segment>
 <pinref part="R37" gate="G$1" pin="1"/>
-<wire x1="322.58" y1="12.7" x2="327.66" y2="12.7" width="0.1524" layer="91"/>
-<label x="327.66" y="12.7" size="1.778" layer="95" xref="yes"/>
+<wire x1="317.5" y1="12.7" x2="320.04" y2="12.7" width="0.1524" layer="91"/>
+<label x="322.58" y="12.7" size="2.54" layer="95" xref="yes"/>
+<pinref part="PI_OUT" gate="G$1" pin="1"/>
+<wire x1="320.04" y1="12.7" x2="322.58" y2="12.7" width="0.1524" layer="91"/>
+<wire x1="322.58" y1="-2.54" x2="320.04" y2="-2.54" width="0.1524" layer="91"/>
+<wire x1="320.04" y1="12.7" x2="320.04" y2="-2.54" width="0.1524" layer="91"/>
+<junction x="320.04" y="12.7"/>
 </segment>
 <segment>
 <pinref part="R38" gate="G$1" pin="2"/>
-<wire x1="45.72" y1="-10.16" x2="45.72" y2="-15.24" width="0.1524" layer="91"/>
-<wire x1="45.72" y1="-15.24" x2="53.34" y2="-15.24" width="0.1524" layer="91"/>
-<label x="53.34" y="-15.24" size="1.778" layer="95" xref="yes"/>
+<wire x1="116.84" y1="-7.62" x2="116.84" y2="-17.78" width="0.1524" layer="91"/>
+<wire x1="116.84" y1="-17.78" x2="139.7" y2="-17.78" width="0.1524" layer="91"/>
+<label x="139.7" y="-17.78" size="1.778" layer="95" xref="yes"/>
+</segment>
+</net>
+<net name="CH1_GAIN" class="0">
+<segment>
+<pinref part="R39" gate="G$1" pin="2"/>
+<pinref part="CH1_AMP" gate="G$1" pin="-IN"/>
+<wire x1="43.18" y1="-157.48" x2="45.72" y2="-157.48" width="0.1524" layer="91"/>
+<wire x1="45.72" y1="-157.48" x2="48.26" y2="-157.48" width="0.1524" layer="91"/>
+<wire x1="45.72" y1="-157.48" x2="45.72" y2="-121.92" width="0.1524" layer="91"/>
+<junction x="45.72" y="-157.48"/>
+<pinref part="CH1_GAIN" gate="G$1" pin="1"/>
+<wire x1="50.8" y1="-121.92" x2="45.72" y2="-121.92" width="0.1524" layer="91"/>
+</segment>
+</net>
+<net name="N$16" class="0">
+<segment>
+<pinref part="CH1_GAIN" gate="G$1" pin="2"/>
+<wire x1="55.88" y1="-121.92" x2="55.88" y2="-127" width="0.1524" layer="91"/>
+<wire x1="55.88" y1="-127" x2="73.66" y2="-127" width="0.1524" layer="91"/>
+<pinref part="CH1_AMP" gate="G$1" pin="OUT"/>
+<wire x1="73.66" y1="-127" x2="73.66" y2="-160.02" width="0.1524" layer="91"/>
+<wire x1="73.66" y1="-160.02" x2="63.5" y2="-160.02" width="0.1524" layer="91"/>
+<pinref part="R40" gate="G$1" pin="1"/>
+<wire x1="81.28" y1="-160.02" x2="78.74" y2="-160.02" width="0.1524" layer="91"/>
+<junction x="73.66" y="-160.02"/>
+<pinref part="CH1_OUT" gate="G$1" pin="TP"/>
+<wire x1="78.74" y1="-160.02" x2="73.66" y2="-160.02" width="0.1524" layer="91"/>
+<wire x1="78.74" y1="-157.48" x2="78.74" y2="-160.02" width="0.1524" layer="91"/>
+<junction x="78.74" y="-160.02"/>
+</segment>
+</net>
+<net name="N$20" class="0">
+<segment>
+<pinref part="CH1_AMP" gate="G$1" pin="+IN"/>
+<wire x1="48.26" y1="-162.56" x2="40.64" y2="-162.56" width="0.1524" layer="91"/>
+<pinref part="R41" gate="G$1" pin="2"/>
+<wire x1="40.64" y1="-162.56" x2="40.64" y2="-165.1" width="0.1524" layer="91"/>
+</segment>
+</net>
+<net name="CH1_IN" class="0">
+<segment>
+<pinref part="R39" gate="G$1" pin="1"/>
+<wire x1="5.08" y1="-157.48" x2="10.16" y2="-157.48" width="0.1524" layer="91"/>
+<pinref part="CH1/DITHER_IN" gate="G$1" pin="1"/>
+<wire x1="10.16" y1="-157.48" x2="33.02" y2="-157.48" width="0.1524" layer="91"/>
+<wire x1="-12.7" y1="-165.1" x2="5.08" y2="-165.1" width="0.1524" layer="91"/>
+<wire x1="5.08" y1="-165.1" x2="5.08" y2="-157.48" width="0.1524" layer="91"/>
+<label x="5.08" y="-157.48" size="2.54" layer="95" rot="R180" xref="yes"/>
+<pinref part="CH1_IN" gate="G$1" pin="TP"/>
+<wire x1="10.16" y1="-152.4" x2="10.16" y2="-157.48" width="0.1524" layer="91"/>
+<junction x="10.16" y="-157.48"/>
+</segment>
+<segment>
+<pinref part="R43" gate="G$1" pin="1"/>
+<wire x1="-73.66" y1="45.72" x2="-73.66" y2="30.48" width="0.1524" layer="91"/>
+<wire x1="-73.66" y1="30.48" x2="-66.04" y2="30.48" width="0.1524" layer="91"/>
+<label x="-66.04" y="30.48" size="2.54" layer="95" xref="yes"/>
+</segment>
+</net>
+<net name="N$31" class="0">
+<segment>
+<pinref part="OUT_ADD" gate="G$1" pin="-IN"/>
+<wire x1="114.3" y1="-307.34" x2="119.38" y2="-307.34" width="0.1524" layer="91"/>
+<junction x="114.3" y="-307.34"/>
+<wire x1="119.38" y1="-307.34" x2="124.46" y2="-307.34" width="0.1524" layer="91"/>
+<wire x1="114.3" y1="-317.5" x2="114.3" y2="-307.34" width="0.1524" layer="91"/>
+<junction x="114.3" y="-317.5"/>
+<pinref part="FEEDBACK" gate="G$1" pin="2"/>
+<wire x1="106.68" y1="-317.5" x2="109.22" y2="-317.5" width="0.1524" layer="91"/>
+<pinref part="R36" gate="G$1" pin="2"/>
+<wire x1="109.22" y1="-304.8" x2="109.22" y2="-317.5" width="0.1524" layer="91"/>
+<junction x="109.22" y="-317.5"/>
+<pinref part="R35" gate="G$1" pin="2"/>
+<wire x1="109.22" y1="-332.74" x2="109.22" y2="-317.5" width="0.1524" layer="91"/>
+<wire x1="109.22" y1="-317.5" x2="114.3" y2="-317.5" width="0.1524" layer="91"/>
+<wire x1="114.3" y1="-365.76" x2="114.3" y2="-317.5" width="0.1524" layer="91"/>
+<pinref part="R21" gate="G$1" pin="2"/>
+<wire x1="106.68" y1="-365.76" x2="114.3" y2="-365.76" width="0.1524" layer="91"/>
+<pinref part="R40" gate="G$1" pin="2"/>
+<wire x1="91.44" y1="-160.02" x2="114.3" y2="-160.02" width="0.1524" layer="91"/>
+<wire x1="114.3" y1="-160.02" x2="114.3" y2="-307.34" width="0.1524" layer="91"/>
+<wire x1="124.46" y1="-279.4" x2="119.38" y2="-279.4" width="0.1524" layer="91"/>
+<wire x1="119.38" y1="-279.4" x2="119.38" y2="-307.34" width="0.1524" layer="91"/>
+<junction x="119.38" y="-307.34"/>
+<pinref part="R22" gate="G$1" pin="1"/>
+</segment>
+</net>
+<net name="N$32" class="0">
+<segment>
+<pinref part="BUFFER" gate="G$1" pin="+IN"/>
+<wire x1="-60.96" y1="66.04" x2="-53.34" y2="66.04" width="0.1524" layer="91"/>
+<pinref part="R42" gate="G$1" pin="2"/>
+</segment>
+</net>
+<net name="N$37" class="0">
+<segment>
+<pinref part="R45" gate="G$1" pin="1"/>
+<wire x1="-55.88" y1="91.44" x2="-50.8" y2="91.44" width="0.1524" layer="91"/>
+<pinref part="BUFFER" gate="G$1" pin="-IN"/>
+<wire x1="-53.34" y1="71.12" x2="-55.88" y2="71.12" width="0.1524" layer="91"/>
+<wire x1="-55.88" y1="71.12" x2="-55.88" y2="91.44" width="0.1524" layer="91"/>
+<pinref part="R44" gate="G$1" pin="2"/>
+<wire x1="-60.96" y1="91.44" x2="-55.88" y2="91.44" width="0.1524" layer="91"/>
+<junction x="-55.88" y="91.44"/>
 </segment>
 </net>
 </nets>