[aprssig] ARPS physical layer

[ka7o at ka7o.net]

Check out:

1200 bps FSK full duplex CCITT V.23
Stated in the KPC3+ spec sheet as it's 'modulation'.
http://www.kantronics.com/products/kpc3.html

CCITT is now "ITU" - a google search for ITU V.23 yields:
http://www.itu.int/rec/T-REC-V.23-198811-I/en

That what you're looking for?

73

> I have been scouring the interweb and have so far not found a definitive
> description of the physical layer / air interface of the APRS system. All
> the published info seems to revolve around the Link layer (AX-25) which is
> all well and good, but doesn't let me design a new TNC. Can someone point
> me
> in the direction of a suitable source of information, please?
>
> Many thanks.
>
> Derek Love
> G7ORK
>
>
> Registered Office- Oval Park. Hatfield Road. Langford. Maldon. CM9 6WG
> Registered in England and Wales. Registered No. 02847065. VAT No. 368 6007
> 36
> _______________________________________________
> aprssig mailing list
> aprssig at tapr.org
> https://www.tapr.org/cgi-bin/mailman/listinfo/aprssig
>