When using the 8753C and 85047A on the 6 GHz range with Power Level set at 4 dB or more the setup works fine. If I set the Power Level below 3 dB I get an error message “Caution: No IF Found”. I know the doubler requires a certain minimum power to work but I can't find anything in the manuals telling me the lower limit. Is it normal to get this message at low power output levels?
Minimum Output is approximately +5 dBm when using the doubler. Otherwise, the error message will appear due to insufficient power on the R channel.