Racal Instruments 3156B, Руководство пользователя

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3156B User Manual
Racal Instrument © 2005 Programming Reference 5-143
ri3156b_set(query)_active_video_pat_number
Description
This selects a video pattern from preloaded library of up to 16k characters. The character will be generated only
if the 3156B was programmed to output video stroke patterns. The pattern is loaded to the instrument using the
ri3156B_load_video_stroke_pattern_data function. The characters are moved about the video screen in
increments set by the ri3156B_set_video_offset_step () function through the range set by the
ri3156B_set_video_offset_range () function. Both channels drive the XY coordinate simultaneously.
Channel Dependency: Common
C Syntax
ViStatus ri3156b_set_active_video_pat_number (ViSession instrHandle, ViInt16 videoStrokePatternNumber)
ViStatus ri3156b_query_active_video_pat_number (ViSession instrHandle, ViInt16 *
videoStrokePatternNumber)
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.
videoStrokePatternNumber
ViInt16
Selects a pre-loaded video pattern number.
Valid Range: 1 to 16374
Default Value: 1
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.