>> Can somebody please explain how the insertion >> loss of a Duplexer is properly measured using a >> HP 8920A (with Spectrum-Analyzer).
> "Jeff DePolo" <j...@...> wrote: > 1. Connect duplexer Tx port to duplex port on 8920. > 2. Connect antenna port on duplexer to antenna port on 8920. I have to think if where you apply the source and sample matters in this example and why. One should be able to apply the Duplex Output Source Signal to the antenna port and sample each outer leg (back to the antenna port). The unconnected leg/port should probably have a termination (load) on it. Might matter more or less maybe depending on where the other half of the Duplexer is tuned. Hmmmmm...? > For example, if you're generating 0 dBm, and the > amplitude at the marker is -2.10 dBm, and you have > 0.5 dB of patch cable loss, the insertion loss > through that leg of the duplexer is 1.6 dB. Another relative comparison is to insert a barrel connector in lieu of the duplexer to get a relative idea of the cable loss (with the barrel in line). s.
