Racal Instruments 3156B, Руководство пользователя

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3156B User Manual
Racal Instrument © 2005 Programming Reference 5-23
ri3156b_set(query)_amplitude
Description
Sets the amplitude for the presently selected waveform. The active channel is selected from the Set Active
Channel panel. Channel Dependency: Independent
C Syntax
ViStatus ri3156b_set_amplitude (ViSession instrHandle, ViReal64 amplitude)
ViStatus ri3156b_query_amplitude (ViSession instrHandle, ViReal64 * amplitude)
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.
amplitude
ViReal64
Description: Selects the amplitude (Volts peak-to-peak).
Each channel may be programmed separately to have
different amplitude level. Amplitude and offset can be set
independently as long as the following relationship is
observed:
+/-(Vp-p/2 + offset) <= Amplitude Window
Amplitude window is from -5V to +5V into 50 ohms or
double into high impedance
Valid Range: 10e-3 to 10 (V into 50
Ω
)
Default Value: 5
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.