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Publication No. 980935 Rev. A
3152B User Manual
EADS North America Test and Services
Programming Reference 5-77
RAMP
Discrete
Selects the ramp shape as the modulating waveform.
ARB
Discrete
Selects an arbitrary waveform as the modulating shape.
The waveform must be designed and downloaded to
the FM arbitrary modulation waveform memory before
one can use this option. Information on how to create
and download arbitrary FM waveforms is given later in
this chapter.
Response
The 3152B returns SIN, TRI, SQU, RAMP, or ARB depending on the selected function shape setting.
FM:FREQuency <fm_freq>(?)
HS Syntax: 0076A<float>(?)
Description
This command sets the modulating wave frequency for the built-in standard modulating waveform library.
Parameters
Name
Range
Type
Default
Description
<fm_freq>
10e-3 to
350e3
Numeric
10e3
Programs the frequency of the modulating waveform in
units of Hz. The frequency of the built-in standard
modulating waveform only is affected.
Response
The 3152B returns the current modulating waveform frequency value. The returned value will be in scientific
notation (for example: 100mHz would be returned as 100e-3).
FM:FREQuency:RASTer <arb_fm_freq>(?)
HS Syntax: 0077A<float>(?)
Description
This command sets the sample clock frequency for the arbitrary modulation waveform. Arbitrary modulation
waveforms must be created with an external utility and downloaded to the arbitrary FM waveform memory
before this function can be used.
Parameters
Name
Range
Type
Default
Description
<arb_fm_freq>
1 to 2.5e6 Numeric
1e6
Programs the sample clock frequency of the arbitrary
modulating waveform in units of S/s.
Response
The 3152B returns the current sample clock of the arbitrary modulation waveform. The returned value will be
in scientific notation (for example: 100mHz would be returned as 100e-3).
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