Welcome to the FlexRadio Community! Please review the new Community Rules and other important new Community information on the Message Board.
The latest SmartSDR Software:
SmartSDR v4.1.5 | SmartSDR v4.1.5 Release Notes
SmartSDR v3.10.15 | SmartSDR v3.10.15 Release Notes

The latest 4O3A Genius Product Software:
The latest 4O3A Genius Product Software and Firmware
How to Receive Technical Support::
If you are needing assistance with FlexRadio products, please refer to the product documentation or check the Help Center for known solutions. Need technical support from FlexRadio? It's as simple as creating a HelpDesk ticket.

Panadapter RF Pumping

Bob G W1GLV
Bob G W1GLV Member ✭✭
edited June 2020 in SmartSDR for Windows
I've got an interesting thing going on in my panadapter. With or without a slice the RF signal goes up and down continuously at about 3 dB. This more prevalent 20 meter and above bands. 40 meters doesn't seem to be doing it. Does anyone know what could be causing that. It would be interesting to know.

Answers

  • W4EY
    W4EY Member
    edited June 2020
    Suggestion: If you have an external RF Power (Watt) meter between your FLEX and the antenna, see if the FLEX is generating RF. If the FLEX is causing the 3db RF Signal, you should see a slight movement on your external RF meter. If it is not the FLEX, it is possibly your computer generating harmonics from the internal motherboard. I had the same type of this problem with RF signals generated on the Panadapter screen until I added RF Chokes to all my computer and FLEX interface cables.
  • Al K0VM
    Al K0VM Member ✭✭✭
    edited November 2017
    Does it still go up and down with no antenna connected?? It could be a local noise source external to the radio. AL, K0Vm
  • Bob G W1GLV
    Bob G W1GLV Member ✭✭
    edited December 2016
    Installed a bunch of toroids and the problem disappeared. Thanks

Leave a Comment

Rich Text Editor. To edit a paragraph's style, hit tab to get to the paragraph menu. From there you will be able to pick one style. Nothing defaults to paragraph. An inline formatting menu will show up when you select text. Hit tab to get into that menu. Some elements, such as rich link embeds, images, loading indicators, and error messages may get inserted into the editor. You may navigate to these using the arrow keys inside of the editor and delete them with the delete or backspace key.

Comment As ...

Categories