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 v4.2.18 | SmartSDR v4.2.18 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.

FreeDV - bandwidth settings

Tom Porada
Tom Porada Member ✭✭
in Third-Party Software

I realized while using FreeDV that the actual signal within the 3K DIGU/DIGL bandwidth runs from 700 to 2300 hz.

On the transmit side (with a Profile) I set a lo cut of 700hz and a hi cut of 2300hz as shown below.

image.png

On the receive side I used a memory channel for 40M DIGL at 7.177 Mhz with a RX Filter Low of -2300hz and an RX Filter High of -700hz. Using this on the receive side cuts down on a lot of background noise.

I'm currently playing around with settings to better understand what works as I am new to FreeDV.

I am not sure this is good practice, but it works.

Other thoughts??

Tom W4IEE

Comments

  • AA0KM
    AA0KM Member ✭✭
    edited May 18

    Using the waveform on a raspberry pi for flex usage it cuts TX filter to 750 to 2250 automatically on the FlexRadio.

    RX filter on most radios just cut the RX filter low as you need to and it may or may not help.

    Current wave form transmits 1.125-kHz bandwidth soon to go down to 860-hz on the V2 RADE.

    TX Frequency width and RX audio width/height :)- not the same thing.

    750hz to 2250khz TX Microphone

    Also the FreeDV narrows the width anyway.

    https://github.com/drowe67/freedv-gui/blob/master/USER_MANUAL.md

    Flat audio in also no EQ.

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