User`s guide

Agilent E6432A Microwave Synthesizer User’s Guide 4-65
HPE6432_GetFlatnessCalData
ViStatus HPE6432_GetFlatnessCalData(ViSession
instrumentHandle,ViInt32 signalPath, ViInt16
*flatnessData);
Purpose
There are six associated functions used to produce output power level
correction values. This function is one of the six associated functions
and is used specify a particular signal path and return the calibration
data for the requested signal path from the VXIplug&play driver’s
internal memory table. The calibration data being retrieved using this
function had to have been previously placed in the VXIplug&play
driver’s internal memory table using the
HPE6432_PutFlatnessCalData() function.
Because output power level can vary over the synthesizer’s frequency
range and attenuator settings, correction values can be produced and
applied to the output power level so that it is essentially “flat”.
Once output power level correction values have been produced and
applied, the synthesizer can be programmed to any frequency from
10 MHz to 20 GHz and attain power level accuracy:
❏❑better than +/– 1.5 dB (over the full attenuator range)
❏❑better than +/– 1.0 dB (at a fixed attenuator setting)
These levels of output power level accuracy allow for all measurement
uncertainties and variations over temperature. The actual
performance achieved with the same power measurement device at a
single temperature and at any frequency (from 10 MHz to 20 GHz)
typically will be less than +/– 0.1 dB.
For complete specifications, refer to “Specifications and
Characteristics” on page 6-1.
Parameter List
instrumentHandle
Variable Type ViSession
This is the ViSession handle that is obtained from the Initialize
function. The instrumentHandle identifies a particular instrument
session.
signalPath
Variable Type ViInt32
This parameter specifies the signal path to be calibrated.