Racal Instruments 3156B, Руководство пользователя

Страница: 250 / 385

3156B User Manual
Programming Reference 5-98 Racal Instrument © 2005
Ri3156b_set(query)_sweep_marker
Description
This function programs marker frequency position. Sweep marker can be placed in between the start and the
stop frequencies. The marker pulse is output from the SYNC output connector. It can also be place on one of
the TTLTrg0-7 lines using the appropriate ri3156B_set_TTLTRG_n_output_state () function.
Channel Dependency: Independent
C Syntax
ViStatus ri3156b_set_sweep_marker (ViSession instrHandle, ViReal64 markerFrequency)
ViStatus ri3156b_query_sweep_marker (ViSession instrHandle, ViReal64 * markerFrequency)
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.
markerFrequency
ViReal64
Programs the sweep marker frequency parameter.
Valid range: Within the sweep start and stop frequencies
Default: (Stop freq - Start freq) / 2
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.