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APD indicator does never shows active state

Chris de Voogd
Chris de Voogd Member ✭✭
in FLEX-8000 Signature Series

My question is how do I know if APD is working correctly (Flex 8600)

The button shows blue and cal shows green.

The active indicator never shows anything when TX (SSB)

Chris

DJ2NL

Answers

  • Mike-VA3MW
    Mike-VA3MW Administrator, FlexRadio Employee, Community Manager, Super Elmer, Moderator admin

    If you have not, reset the radio and make sure you test on SmartSDR v4.1.5.

  • Chris de Voogd
    Chris de Voogd Member ✭✭

    Mike,

    Thanks, I will try to reset.

    Chris

  • Chris de Voogd
    Chris de Voogd Member ✭✭

    Mike,

    sorry, but no result after complete reset (SSDR v4.1.5)

    Chris

  • Mike-VA3MW
    Mike-VA3MW Administrator, FlexRadio Employee, Community Manager, Super Elmer, Moderator admin

    Answer this:

    • Band
    • PreAmp setting
    • RF Power out
    • Mic Input being used
    • Level Meter — what is is peaking at
    • Mic bandwidth - high and lower pass filter settings

    The preamp setting is critical as it can affect the receiving being used to sample the RF.

    Mike

  • Chris de Voogd
    Chris de Voogd Member ✭✭

    band 40m
    PreAmp ?
    RF power 80W
    Mic. input BAL
    Level Meter 9+
    Mic bandwidth. 50-3000

    I don’t know where to find PreAmp setting

    Chris

  • KD0RC
    KD0RC Member, Super Elmer Moderator

    Hi Chris, the pre-amp is the RF Gain setting in the ANT pull-out on the left side of the SmartSDR screen.

    image.png

    Mike is asking about the MIC level, not the S-meter. The MIC level peak indicator is the little rectangle in the meter, not the long bar that follows it.

    image.png

    Your MIC level should be set so that the peak indicator tops out somewhere under 0 dB. I try to keep mine around -5 dB. The important thing is to keep it out of the red to prevent distortion and splattering.

  • Chris de Voogd
    Chris de Voogd Member ✭✭

    Thanks Len,

    pre-amp (RF gain) is set at 0dB

    Mic level peaks at -5dB

    Chris

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