Welcome to the FlexRadio Community! Please review the new Community Rules and other important new Community information on the Message Board.
Need the latest SmartSDR or 4O3A Genius Product Software?
SmartSDR v3.9.19 and the SmartSDR v3.9.19 Release Notes
SmartSDR v2.12.1 and the SmartSDR v2.12.1 Release Notes
The latest 4O3A Genius Product Software and Firmware
SmartSDR v3.9.19 and the SmartSDR v3.9.19 Release Notes
SmartSDR v2.12.1 and the SmartSDR v2.12.1 Release Notes
The latest 4O3A Genius Product Software and Firmware
If you are having a problem, 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.
Need technical support from FlexRadio? It's as simple as Creating a HelpDesk ticket.
HF D-STAR anomaly
Options

Bob KN4HH
Member ✭✭
I just installed ThumbDV on my Flex 6500 and am having some difficulties. I followed instructions for installing SmartSDR for D-STAR and the D-STAR waveform. Flex recognizes the ThumbDV, can put it in D-STAR mode and I can decode headers from every station received. However, when I key up the transmitter, the D-STAR waveform appears. As soon as I modulate, the waveform disappears and only a carrier remains. If I unkey the transmitter and rekey, the waveform appears for a few ms and disappears. If I uninstall the waveform, unplug the ThumbDV, plug it back in the Flex, restart SmartSDR, and restart SmartSDR for D-STAR, I can restore the transmit waveform until I modulate and then it disappears. I have yet to decode any voice transmissions (I am aware of the high signal required for successful voice decode). I have done this reset routine many times with always the same result. I have even switched USB ports on the Flex with no difference.
Many thanks for any suggestions
73, Bob, KN4HH
Many thanks for any suggestions
73, Bob, KN4HH
1
Comments
-
Hi Bob,
The D-Star demodulation issue has been going on for several months now. It doesn't matter how strong the signal is the D-Star waveform won't decode the audio, but will decode the headers. I believe Flex is aware of the issue. I have been waiting for the fix too.
I also have a UHF transverter connected to the Flex that sits a few feet away listening to a DV-Mega D-Star hotspot. In D-Star mode I hear an occasional burp from the decoder audio then nothing and can decode the headers just fine. I suspect there must be an issue in the D-star waveform. In my opinion this should be an easy fix.0
Leave a Comment
Categories
- All Categories
- 328 Community Topics
- 2.1K New Ideas
- 594 The Flea Market
- 7.8K Software
- 6.2K SmartSDR for Windows
- 168 SmartSDR for Maestro and M models
- 396 SmartSDR for Mac
- 260 SmartSDR for iOS
- 246 SmartSDR CAT
- 179 DAX
- 369 SmartSDR API
- 9.1K Radios and Accessories
- 15 Aurora
- 161 FLEX-8000 Signature Series
- 7.1K FLEX-6000 Signature Series
- 909 Maestro
- 51 FlexControl
- 854 FLEX Series (Legacy) Radios
- 873 Genius Products
- 446 Power Genius XL Amplifier
- 312 Tuner Genius XL
- 115 Antenna Genius
- 278 Shack Infrastructure
- 196 Networking
- 439 Remote Operation (SmartLink)
- 135 Contesting
- 723 Peripherals & Station Integration
- 136 Amateur Radio Interests
- 943 Third-Party Software