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Re: R: PCSAT2



>if I understood I have to C PCSAT2...
>On 145.825 while I get the ... response on 435.275 right?

Yes, the TNC on the satelilte has a CONECTED LED.
We use that LED circuit to turn on the 10m 
transponder and key the downllink transponder.
You can connect to the TNC on 145.825 using
either 1200 or 9600 baud.  Once the LED comes ON,
there is nothing else for the packets to do.  Then
you should start transmitting CW or PSK31 on
29.401 MHz +/- doppler... (tune to make sure
you are in the passband.)

And listen on 435.275 +/- FM 10 KHz doppler.
(only tune for best FM carrier)


>... how do I know when the 29.401 is trigged?

You will hear the 435.275 +/- downlink come up full time
in FM carrier, with the noise from the 10m uplink receiver.

>You ... said I can do it also at 1200 or 9600 baud...
>Do I have to do the same way?

Actually, no.  The callsign for the 9600 baud port is
PC2TLM.  So at 9600 baud you would have to
C PC2TLM.  But it is better to use the 1200 baud
port since the signals are more relaible.

de WB4APR, Bob



> -----Messaggio originale-----
> Da: Robert Bruninga [mailto:bruninga@usna.edu] 
> Inviato: domenica 16 luglio 2006 18.18
> A: vimone@alice.it; amsat-bb@amsat.org 
> Oggetto: Re: [amsat-bb] PCSAT2
> 
> >Hi to the list, just a minute ago I heard the PCSAT2.
> >Can anybody tell me how it works?
> >I mean where to TX and where to RX?
> >I've tried to hear on 29.400 but nothing heard.
> 
> The uplink is on 29.401 MHz PSK31 or CW and we hope stations
> with lots of power can try it..
> 
> >I can hear only packets on 70cm 435.275.
> >Sent a connection ( C PCSAT2 ) via the 70 cm but no connection.
> >Where I am missing?
> 
> The packet uplink is the APRS satellite frequency of 145.825
> and the packet downlink is 435.275.  So you should try
> your connection on uplink 145.825 and downlink on 435.275.
> 
> The 29.401 uplink is not on unless triggered.  To trigger
> the 29.401 uplink and 435.275 donlink, you simple
> send a normal 1200 baud AX.25 connnect request
> to PCSAT2 on the 145.825 uplink.  The CONNECTED
> LED in the satellite is what turns on the 10m to 435
> transponder.  ANd it will time out after 1 minute.
> 
> Please experiment.  We only have 1 month left for
> PCSAT2 and we hope someone has enough power to
> get into the 10m uplink (which is very deaf)...
> 
> See the PCSAT2 operations page:
> http://www.ew.usna.edu/~bruninga/pec/pc2ops.html 
> 
> PCSAT2 also responds to 9600 baud digipeating
> and also you can sent the connect request via 9600.
> THis is useful for some grond stations who use 9600
> all the time to monitor the APRS downlink and so this
> way they do not even have to change baudrate
> to trigger the 10m to 435 MHz transponder.
> 
> Bob, WB4APR
> US Naval Academy Satellite Lab
----
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