33Measuring Multiple SignalsResolving Small Signals Hidden by Large SignalsResolving Small Signals Hidden by Large SignalsThis procedure uses narrow resolution bandwidths to resolve two input signals witha frequency separation of 50 kHz and an amplitude difference of 60 dB.Step Action Notes1 Connect two sources to theanalyzer RF INPUT asshown.2 Set up the signal sources. a. Set the frequency of signalgenerator #1 to 300 MHz.b. Set the frequency of the signalgenerator #2 to 300.05 MHz.c. Set signal generator #1 amplitude to−10 dBm.d. Set signal generator #2 amplitude to−54 dBm.This signal is 50 kHz higher infrequency than the first signal.The −54 dBm setting plus−16 dB coupling factor of the86205A results in a signal 60dB below the first signal.3 Select the mode • Press Mode, Spectrum Analyzer.4 Preset the analyzer: • Press Mode Preset.5 Set up the analyzer to viewthe signals.a. Press FREQ Channel, CenterFreq, 300, MHz.b. Press BW, Res BW, 30, kHz.c. Press SPAN X Scale, Span, 500,kHz.
