Icom IC-705, IC-7300 and IC-9700 Waterfall Setup for Weak Signals

Discussion in 'Amateur Radio News' started by VK7HH, Oct 8, 2020.

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  1. K7GYB

    K7GYB XML Subscriber QRZ Page

    Hi. My insight to your question is that the REF in Menu "2" does not degrade or attenuate the received signal. The REF only affects the Spectrum Scope display and not the received signal coming into your station through your antenna. Using RF gain directly has an effect on your RX which can be beneficial when trying to remove QRN. 73.
    M1WML and AD5RX like this.
  2. K9GLS

    K9GLS Ham Member QRZ Page

    REF doesn't change the sensitivity like the RF gain would. I think of REF as just changing the view and nothing else. Here is an good video on that and I'm sure there are 1000's of videos on it:
    W9WQA and AD5RX like this.
  3. PD0IFI

    PD0IFI Ham Member QRZ Page

    reference does only set visable display ... not actual noise floor...
    AD5RX likes this.
  4. KO4HHY

    KO4HHY Ham Member QRZ Page

    Very nice setup, Thank you. I'm slow getting anything correctly, I would like to change the waterfall part of the scope to look like the video, with blue, yellow/orange and red, but the top where the signal strength is I like it as factory, filled and blue, that is the way I have it in SDRuno, I will have to look the video multiple times until I get it correctly.
  5. KK9W

    KK9W Ham Member QRZ Page

    I like it! Thanks for the video.
  6. EA6VY

    EA6VY XML Subscriber QRZ Page

    ThanX for such good tips !!
  7. VK7HH

    VK7HH Ham Member QRZ Page

    Thanks for the comments. Glad that it's helped some here.
  8. PA0MHS

    PA0MHS XML Subscriber QRZ Page

    As long as the entire receive chain remains within its dynamic range (no overload and RF noise higher than noise floor of RX) it makes no difference.
    Reading all responses to this video makes me realize a two things:
    • Many hams don't read manuals
    • Many hams seem to fear playing with their radios and change settings to see what they accomplish.
    W8LGZ likes this.
  9. WA1KPD

    WA1KPD XML Subscriber QRZ Page

    Excellent, thank you very much for both videos!
  10. BH4LLP

    BH4LLP Ham Member QRZ Page

    ThanX for such good tips !!

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