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Symptoms / Solutions:
Wave Load Pull setup back to back verification on a through with the Load and Source Tuners initialized gives power gain close to 0 dB as expected. However, verification with Gamma load values other than 50Ω gives wrong power gain values.
To obtain proper receiver measurements using the PNA-X, ensure that the file IFMUXCAL.txt, located in C:\Program Files\Agilent\Network Analyzer is correct (R1 to R4 must be similar). This file contains receiver offsets used for IF calibration. If corrupted, rename it and put all the jumpers in place. With nothing connected to the PNA-X ports, run the application ifcal.exe located in C:\Program Files\Agilent\Network Analyzer\Service\ directory. The PNA-X will generate a new IFMUXCAL.txt file with correct numbers.
An example of a correct IFMUXCAL.txt file appears as follows:
IFMUX CALR15.98313509063050.815871697708853R25.94147855637884-1.1512360736319R35.92475533872457-0.525978706721356R45.90785275611497-2.33257454708033R15.972014352836020.598166088938812R25.969677686278710.364352395744098R35.90222404187080.386678890694407R45.977756132343850.00946239937570624 |
Figure 1 Valid IFMUXCAL file
Additional Information: Additional information on the Wave Load Pull setup can be found in the Wave-based Load Pull Manual in \Focus Microwaves\Load Pull Explorer\Manuals\Applications
Keywords: Wave Load Pull, Back to Back verification, Power gain, IFMUX cal
Last date modified: October 12, 2017
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Pulsed IV Systems
Device Modeling
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