HP 70908A, Руководство по обслуживанию

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T est 21. LO Input Amplitude Range
The purpose of this test is to verify the ability of the DUT to maintain leveled 1st LO power
with minimum power at 1st LO IN over an LO frequency range of 3 to 6.6 GHz.
This test is dependent upon the repair , replacement, or adjustment of the A1 leveling amplier ,
A2 LO multiplier , and/or the A13 ALC/bias.
1. Connect the equipment as shown in the test setup illustration for this procedure .
2. Set the mainframe line switch to ON.
3. Load and run T est 21. LO Input Amplitude Range . Refer to Chapter 2 for information about
running the software .
When performing this verication test, the DUT frequency is band 2L0. The microwave source
rst provides the DUT 1st LO IN with 3 GHz, 8 dBm, and then 3 GHz, 0110 dBm. The 1st LO
unleveled detector must rst indicate leveled power , and then unleveled power .
After verication of the unleveled detector , the microwave source steps the 1st LO IN from
3 GHz to 6.6 GHz at 20 MHz steps at a power level 1.2 dBm. The test veries leveled power at
each step .
8-46 Module V erication T ests