From 7e8bf3dc9f0162ac1e30d6e57315937ff70506d5 Mon Sep 17 00:00:00 2001
From: "Eugeniy E. Mikhailov" <evgmik@gmail.com>
Date: Sun, 2 Jan 2022 21:12:23 -0500
Subject: added measurements of magnetic control voltage response

---
 examples/lock_eit.py | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/examples/lock_eit.py b/examples/lock_eit.py
index 8742db3..08522c5 100644
--- a/examples/lock_eit.py
+++ b/examples/lock_eit.py
@@ -233,6 +233,64 @@ async def main():
 
     lockin_slope= await calibratingLockin()
 
+    async def responseToChangeOfBfieldControlVoltage():
+        apparatus.state = f'Calibrating lockin response to change of Bfield control voltage, {rfPout} dBm'
+        logger.info(apparatus.state)
+        update_webpage(apparatus=apparatus)
+        ai['pid'].setEnable(True)
+        ai['pid'].reset()
+        apparatus.gui_log.setTraces( initLog() )
+        dV = 0.01
+        ai['lockin'].AuxOut1=dV
+        apparatus.getBCurrent(); # this automatically logs value to TSDB
+
+        # initial lock
+        ai['pid'].setEnable(True)
+        ai['pid'].reset()
+        res = await asyncio.gather(
+                feedbackLoop(apparatus, nsteps=20)
+                )
+
+        # this is for the money lock
+        res = await asyncio.gather(
+                feedbackLoop(apparatus, nsteps=30)
+                )
+
+        fr0 = ai['rfgen'].getFreqFixed()
+        apparatus.getBCurrent(); # this automatically logs value to TSDB
+
+        # this is for the money lock
+        ai['lockin'].AuxOut1=0
+        ai['pid'].setEnable(True)
+        ai['pid'].reset()
+        res = await asyncio.gather(
+                feedbackLoop(apparatus, nsteps=30)
+                )
+        fr1 = ai['rfgen'].getFreqFixed()
+
+        log   = apparatus.gui_log.traces
+        trE=log.getTrace('error')
+
+        df = fr0 - fr1
+        slope = df/dV
+
+        logger.info(f'df = {df}')
+        logger.info(f'response to magnetic control voltage = {slope} Hz/V')
+
+        apparatus.getBCurrent(); # this automatically logs value to TSDB
+
+        # relock to default state
+        ai['lockin'].AuxOut1=0
+        ai['pid'].setEnable(True)
+        ai['pid'].reset()
+        res = await asyncio.gather(
+                feedbackLoop(apparatus, nsteps=20)
+                )
+
+        return slope
+
+    B_response= await responseToChangeOfBfieldControlVoltage()
+
     logger.info('========= Long term lock ===========')
     apparatus.gui_log.setTraces( initLog() )
     apparatus.gui_log.traces.config['tags']['lockin_slope']=float(lockin_slope)
-- 
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