Any FSK support on 6400/6600?

thomasmschaefer

The last post I saw on this topic was in February of 2019 so I thought since I’m new here, I would check the state of FSK in September 2020.

Does the Flex 6400 support FSK? Or is it limited to AFSK?

Same question for the 6600.

Thanks,

Tom NY4I

Tim - W4TME

@thomasmschaefer SmartSDR, which runs all FLEX-6000s only supports AFSK.

KD0RC

Hi Tom. I was always a fan of FSK with a traditional radio and a dedicated RTTY/AMTOR/PACTOR box. Ground loops and other gremlins were much less of a problem that way. In today's world with radios like the Flex, no external HW (not even any wiring) is needed so there is no real advantage to using FSK over AFSK. Just run your favorite program and pipe the audio to the radio via DAX. Did you have a specific reason for wanting FSK instead of AFSK?

73,

Len, KD0RC

thomasmschaefer

A friend asked me for some help with setup. FSK is always what we have used. You still need to watch overdriving the audio with AFSK but I agree it is simpler with a Flex.

KD0RC

Yes, excellent point. With FSK, it is just on/off keying. With AFSK, you need to watch the meters to be sure you are not over or under driving.