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-rw-r--r--HP8596E_take_data.m217
1 files changed, 217 insertions, 0 deletions
diff --git a/HP8596E_take_data.m b/HP8596E_take_data.m
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+function spectrum_analyzer = HP8596E_take_data(varargin)
+% This script reads data from E440a spectrum analyzer and saves it to a file
+% HP8596E_take_data( data_save_flag, data_plot_flag, channels_to_grab_flag, data_save_path, data_file_prefix )
+% channels_to_grab_flag - is boolean array with true/false for the particular channel
+% for example channels_to_grab_flag = [ false true true ] will grab only traces 2 and 3
+%
+% This file closely follows E4440a_take_data.m so look there for updates
+%
+% Eugeniy E. Mikhailov eemikh@wm.edu
+% Gleb Romanov gromanov@hellok.org
+% 8/12/2015 linux friendly and use of lab file utils
+
+%% some sane defaults
+nVarargs = length(varargin);
+if (nVarargs > 5 )
+ error ('wrong number of arguments');
+end
+if (nVarargs < 5 )
+ data_file_prefix = 'S';
+else
+ data_file_prefix = varargin{5};
+end
+if (nVarargs < 4 )
+ data_path = 'Z:\qol_comp_data\data\';
+ % do not worry it will convert Z: to proper path in linux
+else
+ data_path = varargin{4};
+end
+if (nVarargs < 3 )
+ channels_to_grab_flag = [ true, true, true]; % grab all channels
+else
+ channels_to_grab_flag = varargin{3};
+end
+if (nVarargs < 2 )
+ data_plot_flag = true; % Default to plot Data
+else
+ data_plot_flag = varargin{2};
+end
+if (nVarargs < 1 )
+ data_save_flag = true; % Default to save data
+else
+ data_save_flag = varargin{1};
+end
+
+
+%% Windows computer parameters
+if ispc
+ % Define instrument parameters
+ board_index = 0;
+ gpib_address = 18;
+ bufSize = 100000;
+
+ %% Find and initialize instrument
+ obj1 = instrfind('Type', 'gpib', 'BoardIndex', board_index, 'PrimaryAddress', gpib_address, 'Tag', '');
+ % alternatively
+ % obj1 = instrfind('Type', 'visa-gpib', 'RsrcName', 'GPIB0::21::INSTR', 'Tag', '');
+
+ % Create the GPIB object if it does not exist
+ % otherwise use the object that was found.
+ if isempty(obj1)
+ obj1 = gpib('NI', board_index, gpib_address);
+ else
+ fclose(obj1);
+ obj1 = obj1(1);
+ end
+
+ % Adjust the buffers so the traces fit.
+ % Do this before fopen(obj1);
+ obj1.InputBufferSize = bufSize;
+ obj1.OutputBufferSize = bufSize;
+
+ %% Connect to instrument object, obj1.
+ fopen(obj1);
+end
+
+%% Unix specific parameters
+if isunix
+ obj1=lgpib('HP8596E');
+end
+
+disp('--------------------')
+disp(horzcat('Connected to ',query(obj1, 'ID?')));
+
+% Communicating with instrument object, obj1.
+%
+% You can send commands using:
+% fprintf(obj1, '_command_');
+%
+% Or read stuff using:
+% _data_ = query(obj1, '_command_');
+disp('Reading data...');
+
+% We want our data in dB
+fwrite(obj1, 'O3');
+
+Npoints = 401; % FIXME: learn how to get it from Spectrum Analyzer
+tr1 = NaN(Npoints,1); % refill traces with NaN
+tr2 = NaN(Npoints,1);
+tr3 = NaN(Npoints,1);
+
+
+% Read traces
+if channels_to_grab_flag(1);
+ tr1_string = query(obj1, 'TRA?');
+ tr1 = sscanf(tr1_string, '%f,');
+end
+if channels_to_grab_flag(2);
+ tr2_string = query(obj1, 'TRB?');
+ tr2 = sscanf(tr2_string, '%f,');
+end
+
+
+if channels_to_grab_flag(3);
+ tr3_string = query(obj1, 'TRC?');
+ tr3 = sscanf(tr3_string, '%f,');
+end
+
+% Read various stuff
+device_string = query(obj1, 'ID?');
+freq_start_string = query(obj1, 'FA?');
+freq_stop_string = query(obj1, 'FB?');
+freq_center_string = query(obj1, 'CF?');
+freq_span_string = query(obj1, 'SP?');
+amplitude_units_string = query(obj1, 'AUNITS?');
+attenuation_string = query(obj1, 'AT?');
+ref_level_string = query(obj1, 'RL?');
+log_scale_string = query(obj1, 'LG?');
+rbw_string = query(obj1, 'RB?');
+vbw_string = query(obj1, 'VB?');
+sweep_time_string = query(obj1, 'ST?');
+
+%% Disconnect from instrument object, obj1.
+if ispc
+ % windows needs to close the file
+ fclose(obj1);
+end
+
+% Transpose the vectors
+tr1 = tr1';
+tr2 = tr2';
+tr3 = tr3';
+
+% Create the frequency trace
+freq_start = sscanf(freq_start_string, '%f');
+freq_stop = sscanf(freq_stop_string, '%f');
+freq = linspace(freq_start,freq_stop, Npoints);
+
+% Create spectrum analyzer structure
+spectrum_analyzer.traces=[tr1',tr2', tr3'];
+spectrum_analyzer.freq=freq';
+spectrum_analyzer.RBW=sscanf(rbw_string, '%f');
+spectrum_analyzer.VBW=sscanf(vbw_string, '%f');
+spectrum_analyzer.sweep_time=sscanf(sweep_time_string, '%f');
+
+
+%% Save data to a file
+if (data_save_flag)
+ % Get full path of the file to save
+ save_to_file = qol_get_next_data_file( data_file_prefix, data_path );
+
+ % Write the data to a file
+ %disp(' ');
+ disp(horzcat('Saving data to ',save_to_file));
+ header = { ...
+ horzcat(datestr(clock)) ...
+ , horzcat('Device:', ' ', device_string) ...
+ , horzcat('Frequency center, Hz', ' ', freq_center_string) ...
+ , horzcat('Frequency span, Hz', ' ', freq_span_string) ...
+ , horzcat('Frequency start, Hz', ' ', freq_start_string) ...
+ , horzcat('Frequency stop, Hz', ' ', freq_stop_string) ...
+ , horzcat('Amplitude units ', amplitude_units_string) ...
+ , horzcat('Attenuation ', attenuation_string) ...
+ , horzcat('Reference level ', ref_level_string) ...
+ , horzcat('Log scale ', log_scale_string) ...
+ , horzcat('Resolution bandwidth, Hz', ' ', rbw_string) ...
+ , horzcat('Video bandwidth, Hz', ' ', vbw_string) ...
+ , horzcat('Sweep time, seconds', ' ', sweep_time_string) ...
+ , horzcat('Columns are : freq tr1 tr2 tr3') ...
+ };
+
+ % preparing data in column wise fashion
+ data = [freq; tr1; tr2; tr3];
+ data = data'; % now data is column wise
+ save_table_with_header(save_to_file, data, header, '%');
+end
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+
+if (data_plot_flag)
+ %% Plot raw traces
+ %
+ % Open a window
+ figure111 = figure(111);
+ clf(111);
+ % Create plot
+ plot(freq/1e6, tr1, 'Color', [1 0 0], 'DisplayName', 'Trace 1'); hold on
+ plot(freq/1e6, tr2, 'Color', [0 0 0], 'DisplayName', 'Trace 2');
+ plot(freq/1e6, tr3, 'Color', [0 0 1], 'DisplayName', 'Trace 3'); hold off
+
+ xlabel('Detection frequency, MHz','FontSize',14);
+ ylabel('Noise power, dBm','FontSize',14);
+
+ % Show legend
+ legend('show');
+ grid on;
+end
+
+%drawnow;
+
+%% Finish up and cleanup
+% Close all opened files
+fclose('all');
+
+% Bring focus back to the command window
+%commandwindow;
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