Figure 1-6. Lo Power Measurement Point For Test Module - HP 85325A Operating And Service Manual

Adjust the LO Power to
the Test Mixer
Figure 1-6
1. Zero the power meter.
2. Measure the LO power output of the test module as shown in Figure 1-6.
LO Power Measurement Point for Test Module
3. The LO power should be between +16 and +17 dBm. If the LO power is
outside this range, you must change the amount of attenuation inside the
test module. This is accomplished by adding or removing attenuators
inside the module.
Use various combinations of the 1, 2, and 4 dB attenuators to adjust the
LO power to the required range.
4. If you have more than one test module, repeat power measurement for
each test channel module as explained above.
Adjustment Procedures
HP 85325A Operating and Service Manual 1-13
Installation