Hi John.
No decodes here from your audio recording, either. And the reception was crystal clear.
Did set the data speed menu option to 9600? I don't know if the 1200 setting would work with AO-91's DUV data or not; I use an SDR, so my RX audio is already "in" the computer and connected to FoxTelem via VB Audio cable.
Also, I have been using the following USB audio adapter for data audio in/out with success in case you need a device for your computer that can accomodate "line" level audio input:
https://www.amazon.com/Griffin-Technology-iMic-original-Adapter/dp/B003Y5D77...
73!
-Scott, K4KDR
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On Sun, Nov 19, 2017 at 2:16 PM, John Brier johnbrier@gmail.com wrote:
Oh interesting. I didn't consider that. I will see if I can hook the radio into my laptop directly, or try another recorder, though my other recorder does 44.1 KHz only, not 48 KHz like the manual says is ideal.
Thanks Paul.
73, John Brier KG4AKV
On Sun, Nov 19, 2017 at 2:11 PM, Paul Stoetzer n8hm@arrl.net wrote:
Seems likely that some sort of audio filtering is going on in your
recorder.
73,
Paul, N8HM
On Sun, Nov 19, 2017 at 2:07 PM, John Brier johnbrier@gmail.com wrote:
I made a cable to tap the 9600 data pin off my Kenwood and I'm trying to decode telemetry from AO-91.
I am having trouble getting a continuously clean reception, so I don't expect frames, which I'm not getting, but parts of the reception are fine and yet FoxTelem still shows a low S/R of 1.2, 1.5 at best. I am wondering if there is still some filtering going on. I notice the peaks of the "bits" are not flat like they are supposed to be according to the manual:
I am recording the audio off the radio into a Zoom H1 at 48,000 KHz
16bit wav.
Maybe I should try hooking the radio directly up to a computer into
FoxTelem.
Here is my recording:
1743_UTC_-_AO-91_-_FM05_-_KG4AKV_just_transmissions.wav?dl=0
Ideas?
73, John Brier KG4AKV