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Getting Started
To Downconvert a Signal Below 26.5 GHz
Figure 2-10
Mixer Level Display Diagram
There are two maximum levels to consider. The first is that the input to the
downconverter must not exceed +30 dBm. The second is that the input to the
mixer must not exceed +10 dBm. For Diagram, if the input signal is +25
dBm there must be at least 15 dB of input attenuation.
The optimum level is between –10 dBm and –5 dBm.
Another way to adjust the input attenuation is to trigger a one-time
auto-ranging. This must be done after a signal is connected (see step 3
below).
Step 3 - Connect the cables
1. The signal to be downconverted goes to the input SIGNAL connector.
2. The IF output is taken from the IF output connector.
2-10 HP 70427A/HP 70428A User's Guide
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