Racal Instruments 3156B, Руководство пользователя

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3156B User Manual
Programming Reference 5-106 Racal Instrument © 2005
Valid range: 0 to 4
0 – selects sine
1 – selects triangle
2 – selects ramp
3 – selects square
4 – selects arbitrary
Default: 0
FMmarkerFrequency
ViReal64
Programs the FM marker frequency parameter.
Valid range: Within (carrier frequency ± deviation
frequency / 2)
Default: Carrier frequency setting
Return Values
Displays the return status of the function call. If the function was successful, it will return a status of
VI_SUCCESS, otherwise it will return an error code. Passing the error code into the function
"ri3156B_error_message()" will return a string describing the error.
Ri3156b_set(query)_arb_FM_mod_sclk
Description
This programs the modulating wave sample clock frequency. This parameter affects the 3156B when set to
operate in arbitrary FM mode only. The arbitrary FM sample clock frequency parameter does not modify
the sample clock of the arbitrary waveform function. The frequency of the modulating signal can be
determined from the following relationship:
Modulation frequency = FM modulation SCLK / Number of Points in the arbitrary modulating waveform
The modulating waveform can be created by WaveCAD or generated as a data file array using the function
ri3156B_load_arb_FM_mod_data
Channel Dependency: Common
C Syntax
ViStatus ri3156b_set_arb_FM_mod_sclk (ViSession instrHandle, ViReal64 FMArbModulationSCLK)
ViStatus ri3156b_query_arb_FM_mod_sclk (ViSession instrHandle, ViReal64 * FMArbModulationSCLK)