This adjustment saves an output file which lists the corrections that were stored in the instrument. The output file is saved at this location:
<drive>:\Program Files (x86)\Agilent TME\PSA\Output\<Model_Serial#>
The bias currents for the A20 Lowband (1st and 2nd mixer) internal amplifiers are adjusted. These are for the 1st mixer LO amplifier and IF amplifier, and for the 2nd mixer LO amplifier. The currents are set by measuring voltage differences across 1 ohm sense resistors. Voltages are monitored on test points on the A13 Front End Driver with a DVM and are adjusted by supplying data to DACs on A13. The test points are accessible via a header on the top of A13, so placing A13 on an extender is not necessary. The instrument cover and top shield must be removed, however.
This adjustment should be performed after replacing the A20 and/or A13 assemblies.
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This adjustment saves an output file which lists the corrections that were stored in the instrument. The output file is saved at this location:
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Test Equipment |
Model Number |
|---|---|
|
Digital Multimeter |
3458A |
|
E4440-60041 |
Bias Adjustment Board |
|
DC Probe |
11002A, 11003A |
