The Switched LO Distribution Amplifier (SLODA) requires six ALC bias voltages and one gate bias. The voltages for each of these biases are printed on the SLODA label. These voltages can be read with a DVM on the test connector on the Front End Driver, A13J12. The computer sends commands to the PSA to set the appropriate latch and bias DAC, and the DVM is used to verify that the proper bias voltages are present.
This adjustment should be performed after replacing the A21 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 |
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Digital Multimeter |
3458A |
E4440-60041 |
Bias Adjustment Board |
DC Probe |
11002A, 11003A |