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specular peaks in trasmission

Rickyfly
Rickyfly Member ✭✭
edited June 2025 in FLEX-8000 Signature Series
Hello to all,
with my flex 8400M software 3.9.18 when I go into transmission in the spectrum I see specular peaks I also tried with a dummy load both in ft8 and in SSB.

Link to picture

https://ibb.co/S4YxFjtg

Best Answer

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

    Those are normal and are not going out on the air. If you check the right side of the waterfall, you can see just how low those signals are and are below -115dB.

    All radios do this. We let you actually see what happens before the coax connector.

    image.png

Answers

  • Rickyfly
    Rickyfly Member ✭✭
    Thank You Mike.
  • Trucker
    Trucker Member ✭✭✭✭

    Mike, wouldn't it be more accurate to say before the filters? That is what I have been told when I questioned the transmit display.

    James

    WD5GWY

  • John KB4DU
    John KB4DU Member ✭✭✭✭

    The receive display is the signal that “leaks" into the receiver from the transmitter before the final filters.

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