From: Mike Markowski (tnlgc@uoregon.edu)
Date: Fri Feb 20 2004 - 16:40:37 EET
I have a few simple soundmodem questions that I couldn't
answer using Google, and I haven't yet dug into the code. In
soundmodemconfig (using v0.7) I'm trying to get a better
understanding of the parameters:
txDelay: is this the delay between asserting PTT
and start of data transmission?
(My set up with an ICOM 706 MkIIg didn't work
until increasing txDelay to 400 ms)
txTail: delay from end of transmission till deasserting PTT?
I'm using the default 10 ms and my aprs UI packets are
being received by others.
slot time: this one confuses me. I know what traditional slotted
channels are, but it doesn't make sense that a user
would pick the slot length. So I'm guessing this
is something different. Is the default of 100 ms
reasonable? I used 300 ms for no special reason...
pPersistence: I assume this is used by the CSMA backoff
algorithm. Would I ever want to change the
default of 40?
And on a completely unrelated note, if anyone knows of any packet
frequencies to use on HF or in southeastern Pennsylvania, please let
me know. So far I've only been able to use APRS for testing. The
only other nodes I've found locally are FlexNet BBSes, which I don't
know much about except that they reply to SABM+ connection requests
with RR0+ and next with a long packet my soundmodem never seems to
decode. But maybe that's because my txTail or slot time are poorly
chosen... I still have a lot to figure out.
Thanks! I really appreciate all the great help to beginners from
this list.
Mike AB3AP
-
To unsubscribe from this list: send the line "unsubscribe linux-hams" in
the body of a message to terhi.victor@logonet.com
More majordomo info at http://vger.kernel.org/majordomo-info.html
This archive was generated by hypermail 2b30 : Fri Feb 20 2004 - 16:41:02 EET