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NI PXI-5600 Calibration Procedure 32 ni.com
niTuner_CalSetAttenuation
Function Prototype
long niTuner_CalSetAttenuation
(
unsigned int calHandle,
int refLevel,
int mixLevel
)
Purpose
This function sets the RF signal attenuation to the specified reference and mixer levels.
refLevel must be ≤50 dBm. mixLevel must be ≤0 and ≥(refLevel – 50 dBm). Set the levels
in accordance with the following formula:
(reference level – 50) ≤ mixer level ≤ Min (reference level, 0 dBm) ≤ reference level
Parameters
Name Description
calHandle The calibration session reference
refLevel The desired reference level for the RF input signal
mixLevel The desired mixer level for the RF input signal