Diffusion Instrument Control (TekRSA-Freq-vs-Time) Browse

MyAgilentDso.m
296a0dc38129TekRSA-Freq-vs-Time

MyAgilentDso.m
View Options

			% Class for controlling 4-channel Agilent DSO scopes.
			% Tested with DSO7034A

			classdef MyAgilentDso < MyScpiInstrument & MyDataSource & MyCommCont

			properties (Constant = true)
			channel_no = 4 % number of channels
			end

			methods (Access = public)
			function this = MyAgilentDso(varargin)
			this@MyCommCont(varargin{:});

			% 1.6e7 is the maximum trace size of DSO7034A
			%(8 mln point of 2-byte integers)
			this.Comm.InputBufferSize = 2e7; %byte
			this.Trace.name_x = 'Time';
			this.Trace.name_y = 'Voltage';
			this.Trace.unit_x = 's';
			this.Trace.unit_y = 'V';

			createCommandList(this);
			end

			function readTrace(this)
			this.Comm.ByteOrder = 'littleEndian';

			% Set data format to be signed integer, reversed byte order,
			% 2 bytes per measurement point, read the maximum
			% available number of points
			writeStrings(this, ...
			':WAVeform:BYTeorder LSBFirst', ...
			':WAVeform:FORMat WORD', ...
			':WAVeform:POINts:MODE MAX', ...
			':WAVeform:UNSigned OFF', ...
			':WAVeform:DATA?');

			% Read the trace data
			y_data = int16(binblockread(this.Comm, 'int16'));

			% Read the preamble
			pre_str = queryString(this, ':WAVeform:PREamble?');

			% Drop the end-of-the-string symbol and split
			pre = str2double(split(pre_str(1:end-1), ','));
			step_x = pre(5);
			step_y = pre(8);
			x_zero = pre(6);
			y_zero = pre(9);

			% Calculate the y values
			y = double(y_data)*step_y + y_zero;
			n_points = length(y);

			% Calculate the x axis
			x = linspace(x_zero, x_zero + step_x*(n_points-1), n_points);

			this.Trace.x = x;
			this.Trace.y = y;

			triggerNewData(this);
			end

			function acquireContinuous(this)
			writeString(this, ':RUN');
			end

			function acquireSingle(this)
			writeString(this, ':SINGLe');
			end

			function stopAcquisition(this)
			writeString(this, ':STOP');
			end

			% Emulates the physical knob turning, works with nturns=+-1
			function turnKnob(this, knob, nturns)
			switch upper(knob)
			case 'HORZSCALE'

			% Timebase is changed
			if nturns == -1
			this.time_scale = this.time_scale*2;
			elseif nturns == 1
			this.time_scale = this.time_scale/2;
			else
			return
			end
			case {'VERTSCALE1', 'VERTSCALE2'}

			% Vertical scale is changed
			n_ch = sscanf(upper(knob), 'VERTSCALE%i');
			tag = sprintf('scale%i', n_ch);
			if nturns==-1
			this.(tag) = this.(tag)*2;
			elseif nturns==1
			this.(tag) = this.(tag)/2;
			else
			return
			end
			end
			end
			end

			methods (Access = protected)
			function createCommandList(this)
			addCommand(this, 'channel', ':WAVeform:SOURce', ...
			'format', 'CHAN%i', ...
			'info', 'Channel from which the data is transferred');

			addCommand(this, 'time_scale', ':TIMebase:SCALe',...
			'format', '%e',...
			'info', 'Time scale (s/div)');

			addCommand(this, 'trig_lev', ':TRIGger:LEVel', ...
			'format', '%e');

			% trigger slope - works, but incompatible with Tektronix
			addCommand(this, 'trig_slope', ':TRIGger:SLOpe', ...
			'format', '%s', ...
			'value_list', {'NEGative', 'POSitive', 'EITHer', ...
			'ALTernate'});

			addCommand(this, 'trig_source', ':TRIGger:SOUrce', ...
			'format', '%s', ...
			'value_list', {'CHAN1', 'CHAN2', 'CHAN3', 'CHAN4',...
			'EXT','LINE'});

			% trigger mode
			addCommand(this, 'trig_mode', ':TRIGger:SWEep', ...
			'format', '%s', ...
			'value_list', {'AUTO', 'NORMal'});

			addCommand(this, 'acq_mode', ':ACQuire:TYPE', ...
			'format', '%s', ...
			'info', ['Acquisition mode: normal(sample), ', ...
			'high resolution or average'], ...
			'value_list', {'NORMal', 'AVERage', 'HRESolution', ...
			'PEAK'});

			% Parametric commands
			for i = 1:this.channel_no
			i_str = num2str(i);

			addCommand(this, ...
			['cpl' i_str], [':CHANnel' i_str ':COUPling'], ...
			'format', '%s', ...
			'info', 'Channel coupling: AC, DC or GND', ...
			'value_list', {'AC','DC','GND'});

			addCommand(this, ...
			['imp' i_str], [':CHANnel' i_str ':IMPedance'], ...
			'format', '%s', ...
			'info', 'Channel impedance: 1 MOhm or 50 Ohm', ...
			'value_list', {'FIFty','FIF','ONEMeg','ONEM'});

			addCommand(this,...
			['offset' i_str], [':CHANnel' i_str ':OFFSet'], ...
			'format', '%e', ...
			'info', '(V)');

			addCommand(this,...
			['scale' i_str], [':CHANnel' i_str ':SCAle'], ...
			'format', '%e', ...
			'info', 'Channel y scale (V/div)');

			addCommand(this,...
			['enable' i_str], [':CHANnel' i_str ':DISPlay'], ...
			'format', '%b',...
			'info', 'Channel enabled');
			end
			end
			end
			end

rINSTCONTROL/@MyAgilentDso/MyAgilentDso.m296a0dc38129TekRSA-Freq-vs-Time

MyAgilentDso.mView Options

rINSTCONTROL/@MyAgilentDso/MyAgilentDso.m
296a0dc38129TekRSA-Freq-vs-Time

MyAgilentDso.m
View Options