[aprssig] slightly OT talking about 9k6

[Brian D Heaton]

Something like this?
http://nwdigitalradio.com/wp-content/uploads/2012/04/UDRCDS.pdf

73-KY9K/Brian

On 5/7/2016 15:45, Ross Whenmouth via aprssig wrote:
> Hi,
>
> I am working on the design for a "Pi-hat" audio card for the Raspberry 
> pi, specifically for amateur radio use (including APRS and 9k6 
> packet). I am targeting ~ 4Hz to ~ 90 kHz audio input bandwidth (DC - 
> 90 kHz output), compatibility with 600 ohm balanced interfaces (and 
> unbalanced interfaces too), low QRM, complete galvanic isolation and 
> good common mode rejection. 
...........