Mvivona at yahoo.com
Sun Oct 9 05:22:29 UTC 2016
I know this has probably been explained before, but help me understand as this has always puzzled me.
For example purposes I'm going to use 1 watt as the theoretical satellite's output and only one ground station on the input.
The way I understand is: If AO-7 (or any other SSB repeater) receives a signal, it keys up the transmitter side and passes the audio through. If AO-7 transmitter is let's say a 1 watt, then a full quieting signal on the input should make the output max out at 1 watt. If the input signal is weak and noisy, then the output might only be 1/2 watt.
Please explain how the repeater's transmitter can put out more than 1 watt (using more power) if the ground station goes well beyond full quieting by uplinking with let's say 500watts.
Thanks in advance for the explanation.
Sent from my iPad
On Oct 8, 2016, at 7:11 PM, Jim Walls <jim at k6ccc.org> wrote:
My first guess would be that because AO-7 is functionally running with no
battery, if one station is running high power, it easily hogs all the power
-------- Original Message --------
> From: "Joe" <nss at mwt.net>
> Sent: Friday, October 7, 2016 7:11 AM
> To: "amsat-bb" <amsat-bb at amsat.org>
> Subject: [amsat-bb] AO-07
> I wonder if anyone has actually done any studies after all these years
> on propagation's through this bird. AO-07
> I find it in the past couple weeks soo interesting on how varied the
> level of signal strengths can be on very similar passes.
> Where one pass, vs another are almost identical, yet one will be full of
> stations, and the next one all I hear is my own CQ.
> BUT... that difference can be all made by just who is actually on the
> BUT.... then take two passes that are almost identical, and ignore all
> the other people, and pay attention to just your own signal, where on
> this pass my sig is soo weak that 90% of the time I'm hearing nothing,
> then next pass that is very similar I am actually moving the S meter the
> signal is sooo strong.
> And in theroy, this is all Line Of Sight communications, the losses from
> one pass vs another should be the same.
> Yes polarity can be an issue, but I cant see it being the reason for the
> whole pass duration.
> Very Interesting!
> Joe WB9SBD
> The Original Rolling Ball Clock
> Idle Tyme
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