[amsat-bb] Re: SSB Operation on the Satellites

Joe nss at mwt.net
Thu Jun 9 07:58:43 PDT 2011

doppler effects both paths, up and down.

so at least if everyone is listening to a 100Hz freq tone at 100 Hz, we 
are all on the same freq.


The Original Rolling Ball Clock
Idle Tyme

On 6/9/2011 9:35 AM, n0jy at lavabit.com wrote:
> OK my brain may be playing tricks, but if you vary only your transmit
> frequency such that you always hear yourself on the same downlink
> frequency, isn't it true that the other station may not necessarily be
> hearing you on the same downlink frequency and is chasing you anyway?
> Your doppler is +5kHz (for example) on the receive, the bird is just about
> to pass overhead of me though so my receive ferquency goes rapidly from
> +2kHz to -5kHz, your transmit tuning has no relation at all to what
> frequency I am listening on.  Then the bird goes past you and you suddenly
> switch down 5kHz, so I have to follow you on my receive.
> Or am I nuts?  (Quite possible, come see where I work and you will
> understand!)
> Jerry
>> I always varied the transmit.
>> This way the person I'm talking to as well as any other listeners are
>> all on the same freq listening.
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