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Real-Time I/Q Baseband Generator User’s and Programming Guide
4-59
ESG Family Signal Generators
Programming Commands and Examples
Options UN8 and 202
Programming Commands
Creating a Custom I/Q Modulation
:MEMory:DATA:IQ "<file name>",offsetQ,num states,i0,q0,i1,q1,...
[,diff state,num diff states,diff0,diff1,...]
This command enables you to define and store a custom I/Q file.
"<file name>"
The name under which to store the defined I/Q information
offsetQ
Whether the Q output is delayed by 1/2 symbol from the I output
(ON|OFF|1|0)
num states
Number of symbols (2 through 256)
i0
I value of first symbol (-1 t1)
q0
Q value of first symbol (-1 t1)
diff state
Toggle for differential encoding. (ON|OFF|1|0)
num diff states
The number of differential states (0 through 256)
diff0
Value of first differential state (an integer value from -128 through
+127)
diff1
Value of 2nd differential state (an integer value from -128 through
+127)
Example
The following example creates and stores a two-symbol I/Q file named
testBPSK
that has
offset Q turned on.
:MEM:DATA:IQ "testBPSK",1,2,1,0,0,0
FSK Frequency Deviation
[:SOURce]:RADio:CUSTom:MODulation:FSK[:DEViation] <val><unit>
[:SOURce]:RADio:CUSTom:MODulation:FSK[:DEViation]?
[:SOURce]:RADio:<desired format>:MODulation:FSK[:DEViation] <val><unit>
[:SOURce]:RADio:<desired format>:MODulation:FSK[:DEViation]?
This command selects symmetric FSK frequency deviation; to define an asymmetric or
different convention than the default, see “
Building a Customized FSK Modulation with
Range: 0 Hz is the minimum value; the maximum value depends upon the symbol rate.
*RST value: 400.0 Hz
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