[ao16aprs] Re: AO16/LU19/IO26 Renewed TRAKNET Interest

["Tim Cunningham" <tim_cunningham@mindspring.com>]

Only gateway stations need to receive the downlink.  The downlink
from AO-16 is 1200 baud PSK (Phase Shift Keying).  This requires
a special PSK TNC along with a radio that is capable of using the
LSB (Lower Sideband SSB mode) on the downlink.

Manchester FM on the uplink is an easy modification to most any
TNC compatible.

The downlink is a very different story.  Mobile stations will not need
a downlink as they will only be transmitting an uplink signal.


73's,

Tim - N8DEU


-----Original Message-----
From: Schayk A.H. van <A.H.Schayk@arcadis.nl>
To: TAPR AO-16 APRS Special Interest Group <ao16aprs@lists.tapr.org>
Date: Thursday, August 26, 1999 8:35 AM
Subject: [ao16aprs] Re: AO16/LU19/IO26 Renewed TRAKNET Interest


>I've read something in bob's original proposel about xor'ing the txd with
>the txclock i guess this is a manchester tnc
>but what about the downlink wat will we need for that?
>
>> -----Oorspronkelijk bericht-----
>> Van: dpfister [SMTP:dpfister@kc.net]
>> Verzonden: donderdag 26 augustus 1999 15:28
>> Aan: TAPR AO-16 APRS Special Interest Group
>> Onderwerp: [ao16aprs] Re: AO16/LU19/IO26 Renewed TRAKNET Interest
>>
>>
>> > > This last weekend I attended the ARRL KS State Convention in Salina,
>> KS. The
>> > > A0-27 demo was one of the 'neat' activities I attended. How would
this
>> compare
>> > > to using A0-27?
>> >
>> > Uplink power/antenna/radio should be the same.  But you need the
>> manchester TNC..
>> >
>>
>> What is the manchester TNC?
>>
>> > >
>> > > I am going to Jamaica next month for my daughter's wedding. I was
>> wandering
>> > > about taking some kind of APRS with me, this would be about the only
>> way (that I
>> > > know of) to get back into the USA network. With the luggage limits in
>> mind, what
>> > > would I have to take to get to the network? Since I am a tech+ HF is
>> pretty much
>> > > out. A bird in the sky is about all that is left isn't it?
>> >
>> > Yes, but it is not usable until we have permanent downlink stations...
>> > but we must begin somewhere...
>> >
>>
>> Ok sounds like a plan to me. I have to start at the beginning. What is
the
>> $3
>> mod and manchester TNC?
>>
>>
>
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