Beware of Diplex roll off. We have C-Cor 862 gear and have recently been using 1G stuff for new builds. We have always had our FWD Telemetry at 51 MHz with no issues. However, some of the C-Cor 1GHz gear has roll-off at this frequency. You'll see your fwd telm. level be about 5-10 dB lower at each amp as you sweep but no response issues from 54-1G. By the time you get a few amps out you can't sweep cause it won't find forward telm. We raised the FWD telm. to 53MHz. Works much better here. Just an FYI.
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