3156B User Manual
Programming Reference 5-100
Racal Instrument © 2005
Default: 1
sweepDirection
ViInt16
Programs the sweep direction parameter.
Valid range: 0,1
0 – selects sweep UP
1 – selects sweep DOWN
Default: 0
markerFrequency
ViReal64
Programs the sweep marker frequency parameter.
Valid range: Within the sweep start and stop frequencies
Default: (Stop freq - Start freq) / 2
Ri3156b_set(query)_FM_carrier_freq
Description
Sets the frequency for the FM carrier waveform. Carrier waveform is sinusoidal.
Channel Dependency: Common
C Syntax
ViStatus ri3156b_set_FM_carrier_freq (ViSession instrHandle, ViReal64 FMcarrierFrequency)
ViStatus ri3156b_query_FM_carrier_freq (ViSession instrHandle, ViReal64 * FMcarrierFrequency)
Parameters
Name
Variable
Type
Description
instrHandle
ViSession
The Instrument Handle is used to identify the unique
session or communication channel between the driver
and the instrument. If more than one instrument of the
model type is used, this will be used to differentiate
between them. Note that the initialize function may be
used to associate multiple instrument handles with a
single instrument.
FMcarrierFrequency
ViReal64
Programs the FM carrier frequency.
Valid Range: 0.01 to 25e6
Default Value: 1e6
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