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Rx A and rx B

GM7PBB
GM7PBB Member ✭✭
Hi. I have a 6700, now when I put an RX antenna to port "RX-A in" it works fine, good signal etc but if I change the same RX antenna to port "RX-B in" and select RX-B the received signal is very low and just hear from it. very odd.

Thanks
John GM7PBB

Answers

  • KD0RC
    KD0RC Broomfield, COMember, Super Elmer Moderator

    Hi John, do you have the RF Gain, Audio Gain and AGC-T set the same in B as you have in A?

  • GM7PBB
    GM7PBB Member ✭✭
    Hi Ken. Yes I made sure both were set the same, if I turn the rf gain up to +40 on the RX B I get a low signal but nothing like RX A is. its as if RX B is deaf, even the transverter port woks perfect.

    Thanks.
  • GM7PBB
    GM7PBB Member ✭✭
    I meant Len :-)
  • KD0RC
    KD0RC Broomfield, COMember, Super Elmer Moderator

    Hi John, No worries, I get Ken, Glen, Ben... 😀

    It sounds like a problem with the radio. I would submit a helpdesk ticket.

  • Karl
    Karl Member ✭✭

    What was the outcome of this issue ??

    It would be good to know and great knowledge for the Forum and others to see.

    Thanks

    Karl.

  • Butch
    Butch Member ✭✭✭
    edited January 23

    John - I'm not sure if this has a bearing on your question, but if you have your internal ATU engaged this might answer your question. Take a look at the Flex 6700 block diagram on page 40 of the Flex-6000 Hardware Reference Manual This diagram shows the common switch connection on the RX A Out switch routing back make a connection before the ATU, in other words the RXA connection runs through the ATU. Now follow the connection from the RX B Out common switch and you'll notice it does not go through the ATU, but rather goes directly to the ANT2 Relay.

    If your internal ATU is engaged perhaps this is why you are noticing lower signal on RX B. (Of course if your internal ATU in in the bypass mode, there shouldn't be a difference.)

    Butch, KF4HR

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