Re: [amsat-bb] AO-51 question

["Freeman P. Pascal IV" <pascal@xxxxxxxxxx>]

Andrew,

The data channel normally operates at 9600bps up/down (sometimes 
38400bps down).  At this data rate you will not hear anything other than 
what sounds like radio noise or static.  I have noticed I can hear a 
slight ringing when the signal is strong and lots of data is being 
transfered.  I suspect it's due to the interaction with the filters on 
my TS-2000X.

You can tell when the data channel is active by looking at your 
S-meter.  When active, AO-51 will push my S-meter to S9+40 (with my mast 
mounted preamps).  If you are tuning by hand then tune for maximum 
signal level.

-Freeman, N5FPP

Andrew Harris wrote:

>Hello, 
>
>   I was listening to the AO-51 pass (at about 15:30 UTC) today.  I
>could hear voice traffic, but when I would switch to the data
>frequency, I didn't really hear anything at all.  Am I supposed to be
>able to hear "modem-like" noises on the data channel?  I am using an
>HT with an Arrow antenna (pointing it by hand).  I don't have a preamp
>or anything.  To do data with the Arrow antenna, does one need a
>preamp?
>
>   Also, I'm using the TH-D7a.  I know I can't do full satellite data
>with it, but i thought I should be able to see received data...
>
>   Has anyone tried data with a similar setup?
>
>thanks,
>-andrew
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