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rINSTCONTROL/@MyRsa/MyRsa.m
215e02b1c16aTekRSA-Freq-vs-Time

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MyRsa.m
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classdef MyRsa < MyInstrument
properties (SetAccess=protected, GetAccess=public)
rbw;
start_freq;
stop_freq;
cent_freq;
span;
average_no;
point_no;
enable_avg;
Trace;
valid_points;
end
properties (Dependent=true)
freq_vec;
end
methods
function this=MyRsa(name,interface, address,varargin)
this@MyInstrument(name, interface, address,varargin{:});
if this.enable_gui; initGui(this); end;
%Valid point numbers for Tektronix 5103 and 5106.
%Depends on the RSA. Remove this in the future.
this.valid_points=[801,2401,4001,10401];
createCommandList(this);
createCommandParser(this);
switch interface
case 'TCPIP'
connectTCPIP(this);
end
%Opens communications
openDevice(this);
%Finds the current status of the device
readStatus(this);
%Initializes the device
initDevice(this);
closeDevice(this);
end
end
methods
function connectTCPIP(this)
buffer = 1000 * 1024;
visa_brand = 'ni';
visa_address_rsa = sprintf('TCPIP0::%s::inst0::INSTR',...
this.address);
this.Device=visa(visa_brand, visa_address_rsa,...
'InputBufferSize', buffer,...
'OutputBufferSize', buffer);
set(this.Device,'InputBufferSize',1e6);
set(this.Device,'Timeout',10);
end
function readProperty(this, varargin)
for i=1:length(varargin)
if ~isprop(this, varargin{i})
error('%s is not a property of the class',varargin{i})
end
%Finds the index of the % sign which indicates where the value
%to be written is supplied
ind=strfind(this.CommandList.(varargin{i}).command,'%');
%Creates the correct read command
read_command=[this.CommandList.(varargin{i}).command(1:(ind-2)),'?'];
%Reads the property from the device and stores it in the
%correct place
this.(varargin{i})=str2double(this.read(read_command));
end
end
function readStatus(this)
readProperty(this,'rbw','cent_freq','span','start_freq',...
'stop_freq','enable_avg');
end
function initGui(this)
set(this.Gui.reinit, 'Callback',...
@(hObject, eventdata) reinitCallback(this, hObject,...
eventdata));
set(this.Gui.point_no, 'Callback',...
@(hObject, eventdata) point_noCallback(this, hObject,...
eventdata));
set(this.Gui.start_freq, 'Callback',...
@(hObject, eventdata) start_freqCallback(this, hObject,...
eventdata));
set(this.Gui.stop_freq, 'Callback',...
@(hObject, eventdata) stop_freqCallback(this, hObject,...
eventdata));
set(this.Gui.cent_freq, 'Callback',...
@(hObject, eventdata) cent_freqCallback(this, hObject,...
eventdata));
set(this.Gui.span, 'Callback',...
@(hObject, eventdata) spanCallback(this, hObject,...
eventdata));
set(this.Gui.rbw, 'Callback',...
@(hObject, eventdata) rbwCallback(this, hObject,...
eventdata));
set(this.Gui.fetch_single, 'Callback',...
@(hObject, eventdata) fetchCallback(this, hObject,...
eventdata));
set(this.Gui.average_no, 'Callback',...
@(hObject, eventdata) average_noCallback(this, hObject,...
eventdata));
set(this.Gui.enable_avg, 'Callback',...
@(hObject, eventdata) enable_avgCallback(this, hObject,...
eventdata));
end
function initDevice(this)
for i=1:this.command_no
if this.CommandList.(this.command_names{i}).write_flag
write(this, ...
sprintf(this.CommandList.(this.command_names{i}).command,...
this.CommandList.(this.command_names{i}).default));
this.(this.command_names{i})=...
this.CommandList.(this.command_names{i}).default;
end
end
end
function reinitCallback(this, hObject, eventdata)
reinitDevice(this);
%Turns off indicator
set(hObject,'Value',0);
end
function reinitDevice(this)
openDevice(this);
readStatus(this);
initDevice(this);
write(this,'INIT:CONT ON');
closeDevice(this);
end
function point_noCallback(this, hObject, eventdata)
value_list=get(hObject,'String');
this.point_no=str2double(value_list{get(hObject,'Value')});
openDevice(this);
writeProperty(this,'point_no',this.point_no);
readStatus(this);
closeDevice(this);
end
function start_freqCallback(this, hObject, eventdata)
this.start_freq=str2double(get(hObject,'String'))*1e6;
openDevice(this);
writeProperty(this,'start_freq',this.start_freq);
readStatus(this);
closeDevice(this);
end
function stop_freqCallback(this, hObject, eventdata)
this.stop_freq=str2double(get(hObject,'String'))*1e6;
openDevice(this);
writeProperty(this,'stop_freq',this.stop_freq);
readStatus(this);
closeDevice(this);
end
function cent_freqCallback(this, hObject, eventdata)
this.cent_freq=str2double(get(hObject,'String'))*1e6;
openDevice(this);
writeProperty(this,'cent_freq',this.cent_freq);
readStatus(this);
closeDevice(this);
end
function spanCallback(this, hObject, eventdata)
this.span=str2double(get(hObject,'String'))*1e6;
openDevice(this);
writeProperty(this,'span',this.span);
readStatus(this)
closeDevice(this);
end
function rbwCallback(this, hObject, eventdata)
this.rbw=str2double(get(hObject,'String'))*1e3;
openDevice(this);
writeProperty(this,'rbw',this.rbw);
closeDevice(this);
end
function average_noCallback(this, hObject, eventdata)
this.average_no=str2double(get(hObject,'String'));
%Writes the average_no to the device only if averaging is
%enabled
openDevice(this);
writeProperty(this,'average_no',this.average_no);
closeDevice(this);
end
function createCommandList(this)
addCommand(this,'average_no','TRAC3:DPSA:AVER:COUN %d',...
'default',1,'attributes',{{'numeric'}},'write_flag',true);
addCommand(this, 'rbw','DPSA:BAND:RES %d Hz',...
'default',1e3,'attributes',{{'numeric'}},'write_flag',true);
addCommand(this, 'span', 'DPSA:FREQ:SPAN %d Hz',...
'default',1e6,'attributes',{{'numeric'}},'write_flag',true);
addCommand(this, 'start_freq','DPSA:FREQ:STAR %d Hz',...
'default',1e6,'attributes',{{'numeric'}},'write_flag',true);
addCommand(this, 'stop_freq','DPSA:FREQ:STOP %d Hz',...
'default',2e6,'attributes',{{'numeric'}},'write_flag',true);
addCommand(this, 'cent_freq','DPSA:FREQ:CENT %d Hz',...
'default',1.5e6,'attributes',{{'numeric'}},'write_flag',true);
addCommand(this, 'point_no','DPSA:POIN:COUN P%d',...
'default',10401,'attributes',{{'numeric'}},'write_flag',true);
addCommand(this,'enable_avg','TRAC3:DPSA:COUN:ENABLE %d',...
'default',0,'attributes',{{'numeric'}},'write_flag',true);
end
function fetchCallback(this, hObject, eventdata)
%Fetches the data using the settings given. This function can
%in principle be used in the future to add further fetch
%functionality.
switch get(hObject,'Tag')
case 'fetch_single'
readSingle(this)
end
set(this.Gui.fetch_single,'Value',0);
end
function enable_avgCallback(this, hObject, eventdata)
this.enable_avg=get(hObject,'Value');
openDevice(this)
writeProperty(this,'enable_avg',this.enable_avg);
closeDevice(this);
end
function readSingle(this)
openDevice(this);
readStatus(this);
fwrite(this.Device, 'fetch:dpsa:res:trace3?');
data = binblockread(this.Device,'float');
x=this.freq_vec/1e6;
unit_x='MHz';
name_x='Frequency';
closeDevice(this);
%Calculates the power spectrum from the data, which is in dBm.
%Output is in V^2/Hz
power_spectrum = (10.^(data/10))/this.rbw*50*0.001;
%Trace object is created containing the data and its units
this.Trace=MyTrace('RsaData',x,power_spectrum,'unit_y',...
'$\mathrm{V}^2/\mathrm{Hz}$','name_y','Power','unit_x',...
unit_x,'name_x',name_x);
%Plotting for test purposes - to be removed in the future
figure
this.Trace.plotTrace(gca);
end
end
methods
%Set function for central frequency, changes gui to show central
%frequency in MHz
function set.cent_freq(this, cent_freq)
this.cent_freq=cent_freq;
if this.enable_gui
set(this.Gui.cent_freq,'String',this.cent_freq/1e6);
end
end
%Set function for rbw, changes gui to show rbw in kHz
function set.rbw(this, rbw)
assert(isnumeric(rbw) && rbw>0,'RBW must be a positive double');
this.rbw=rbw;
if this.enable_gui
set(this.Gui.rbw,'String',this.rbw/1e3);
end
end
%Set function for enable_avg, changes gui
function set.enable_avg(this, enable_avg)
assert(isnumeric(enable_avg),...
'Flag for averaging must be a number')
assert(enable_avg==1 || enable_avg==0,...
'Flag for averaging must be 0 or 1')
this.enable_avg=enable_avg;
if this.enable_gui
set(this.Gui.enable_avg,'Value',this.enable_avg)
end
end
%Set function for span, changes gui to show span in MHz
function set.span(this, span)
assert(isnumeric(span) && span>0,...
'Span must be a positive number');
this.span=span;
if this.enable_gui
set(this.Gui.span,'String',this.span/1e6);
end
end
%Set function for start frequency, changes gui to show start
%frequency in MHz
function set.start_freq(this, start_freq)
assert(isnumeric(start_freq),'Start frequency must be a number');
this.start_freq=start_freq;
if this.enable_gui
set(this.Gui.start_freq,'String',this.start_freq/1e6);
end
end
%Set function for stop frequency, changes gui to show stop
%frequency in MHz
function set.stop_freq(this, stop_freq)
assert(isnumeric(stop_freq),...
'Stop frequency must be a number');
this.stop_freq=stop_freq;
if this.enable_gui
set(this.Gui.stop_freq,'String',this.stop_freq/1e6)
end
end
%Set function for average number, also changes GUI
function set.average_no(this, average_no)
assert(isnumeric(average_no),'Number of averages must be a number')
assert(logical(mod(average_no,1))==0 && average_no>0,...
'Number of averages must be a positive integer')
this.average_no=average_no;
if this.enable_gui
set(this.Gui.average_no,'String',this.average_no);
end
end
%Set function for point number, checks it is valid and changes GUI
function set.point_no(this, point_no)
bool=ismember(point_no,this.valid_points);
if bool
this.point_no=point_no;
if this.enable_gui
ind=strcmp(get(this.Gui.point_no,'String'),...
num2str(point_no));
set(this.Gui.point_no,'Value',find(ind));
end
else
error('Invalid number of points chosen for RSA')
end
end
end
methods
%Generates a vector of frequencies between the start and stop
%frequency of length equal to the point number
function freq_vec=get.freq_vec(this)
freq_vec=linspace(this.start_freq,this.stop_freq,...
this.point_no) ;
end
end
end
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