Hi All, On my 9100 I found that Icom filtered out the low frequency tones so it was necessary to use the aux out connector and be in data mode to get the full range of audio to be able to decode DUV.
It looks like Icom took an entirely different approach on the 9700, DUV is still filtered out on the front panel audio, but now aux out audio on the back panel looks to be also filtered and it makes no difference if you are in FM-D nor not, zero decodes on fox telemetry.
The way around this that worked for me was to go into the 9700 connectors menu set USB AF/IF output to IF, set the level to 10% or so and then go make sure that Windows is set for 48000 on the audio port created, then on FoxTelem select the audio port, 48000 and then set IQ for the mode and start it up, you will see two instances of the passband in the lower window, click on the middle of one of them and FoxTelem should be hunting around for a signal, occasionally FoxTelem seems to get confused with the two duplicate passbands in the window, but eventually it picks one and stops hunting.
Captured about 1000 frames so far using this method and it seems to work well.
73 Kevin WA7FWF