[amsat-bb] Re: AMSAT-BB Digest, Vol 5, Issue 117

Alan Kung alankung at public3.bta.net.cn
Sat Mar 13 08:15:35 PST 2010

Hi Bill,

Yes,  "Digital Transponder" means packet function.

Strictly it is not a digital mode transponder on HO-68. It is data store-forward 
transfer over analog FM RF channel. the link layer protocol based on the 
AX.25, and applications layer protocol used PACSAT.

Alan Kung, BA1DU

----- Original Message ----- 
From: "Bill Dzurilla" <billdz.geo at yahoo.com>
To: <amsat-bb at amsat.org>
Sent: Saturday, March 13, 2010 3:29 AM
Subject: [amsat-bb] Re: AMSAT-BB Digest, Vol 5, Issue 117


Thank you very much for your great work with HO-68 and for your effort to solve the voice/packet problem.

I do not entirely follow the schedule, however.  Does "Digital Transponder" mean packet?  Where it says:

> 14 Mar. 2010, Digital Transponder
> ================================
> 16:45...Turn On--Linear Transponder
> India, Africa, Middle East,
> Europe,NA
> 17:30...Turn Off

does that mean digital (packet) or linear (SSB)?  Does it mean that the linear transponder will be active on 14 March and 15 March and that the rest of thw week is digital only?

Please clarify if possible.

73, Bill NZ5N

> Message: 14
> Date: Sat, 13 Mar 2010 00:07:41 +0800
> From: "Alan Kung" <alankung at public3.bta.net.cn>
> Subject: [amsat-bb] HO-68 Schedule - 14-21 Mar 2010
> To: <amsat-bb at amsat.org>
> Message-ID:
> <009201cac1fe$35fc6db0$6c01a8c0 at ba1duoffice>
> Content-Type: text/plain; 
> charset="gb2312"
> Hello all,
> I got a lot of responses about problem of digital mode 
> through HO-68. The main problem is that Packet
> communication 
> is often interrupted by voice. We are trying a new schedule
> in this week, voice and packet operations will be separated
> by the schedule, of course, this just depends on the
> hams'own 
> discipline. If you have any comment and suggestion, please
> let me know.
> 14 Mar. 2010, Digital Transponder
> ================================

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