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rINSTCONTROL/@MyTds/MyTds.m
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MyTds.m
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% Class for controlling 2-channel Tektronix TDS scopes.
classdef MyTds < MyTekScope
properties (Constant = true)
point_no = 2500 % number of points is fixed for this device
end
methods (Access = public)
function this = MyTds(varargin)
this@MyTekScope(varargin{:});
this.channel_no = 2;
this.knob_list = lower({'HORZSCALE', 'VERTSCALE1', ...
'VERTSCALE2'});
% 5e3 is the maximum trace size of TDS2022
%(2500 point of 2-byte integers)
this.Comm.InputBufferSize = 1e4; % byte
createCommandList(this);
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
sc = this.time_scale*2;
elseif nturns==1
sc = this.time_scale/2;
else
return
end
writeString(this, ...
sprintf('HORizontal:MAIn:SCAle %i',sc));
case {'VERTSCALE1', 'VERTSCALE2'}
% vertical scale is changed
n_ch = sscanf(upper(knob), 'VERTSCALE%i');
tag = sprintf('scale%i', n_ch);
if nturns==-1
sc = this.(tag)*2;
elseif nturns==1
sc = this.(tag)/2;
else
return
end
writeString(this, sprintf('CH%i:SCAle %i',n_ch,sc));
end
end
end
methods (Access = protected)
function createCommandList(this)
addCommand(this, 'channel', ':DATa:SOUrce', ...
'format', 'CH%i', ...
'info', 'Channel from which the data is transferred', ...
'value_list', {1, 2});
addCommand(this, 'time_scale', ':HORizontal:MAIn:SCAle', ...
'format', '%e', ...
'info', 'Time scale (s/div)');
% Trigger level
addCommand(this, 'trig_lev', ':TRIGger:MAIn:LEVel', ...
'format', '%e', ...
'info', '(V)');
addCommand(this, 'trig_slope', ':TRIGger:MAIn:EDGE:SLOpe', ...
'format', '%s', ...
'value_list', {'RISe', 'FALL'});
addCommand(this, 'trig_source', ':TRIGger:MAIn:EDGE:SOUrce',...
'format', '%s', ...
'value_list', {'CH1', 'CH2', 'EXT', 'EXT5', 'EXT10', ...
'AC LINE'});
addCommand(this, 'trig_mode', ':TRIGger:MAIn:MODe', ...
'format', '%s', ...
'value_list', {'AUTO','NORMal'});
addCommand(this, 'acq_state', ':ACQuire:STATE', ...
'format', '%b', ...
'info', 'State of data acquisition by the scope');
% Parametric commands
for i = 1:this.channel_no
i_str = num2str(i);
addCommand(this,...
['cpl',i_str], [':CH',i_str,':COUP'], ...
'format', '%s', ...
'info', 'Channel coupling: AC, DC or GND', ...
'value_list', {'DC', 'AC', 'GND'});
addCommand(this,...
['scale',i_str], [':CH',i_str,':SCAle'], ...
'format', '%e',...
'info', 'Channel y scale (V/div)');
addCommand(this,...
['enable',i_str],[':SEL:CH',i_str], ...
'format', '%b', ...
'info', 'Channel enabled');
end
end
end
end
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