Agilent Technologies 85309B, Руководство пользователя

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Service Guide 85309-90082 2-3
LO/IF Distribution Unit Operating Information
85309B 85309B Front Panel Features
85309B Front Panel Features
Figure 2-2 85309B Standard/Option 001/002 Front Panel
Figure 2-3 85309B Option 400/401/402 Front Panel
DETECTOR VOLTAGE Display
The reference mixer has a detector that measures the amount of LO power coming into its LO input. This
voltage is sent to the 85309B where it is displayed in the DETECTOR VOLTAGE display. The voltage is directly
proportional to the amount of LO power.
This display allows you to monitor the amount of LO power going to the reference mixer. It is assumed that
the cable lengths to the reference and test mixers are the same. This ensures that the LO power going to the
test mixer is the same as that going to the reference mixer.
LO POWER ADJUST
This adjustment controls the amount of LO power going to the mixers.
The 85309B and LO source must provide enough power to match the needs of your specific mixers and to
compensate for loss through the LO cable (the cable that goes from the LO source to the 85309B).
“Step 6.
Adjust the LO Power” on page 1-10 explains how to select the proper amount of power.