[amsat-bb] Re: protocol for using sats

Trevor . m5aka at yahoo.co.uk
Fri Feb 8 09:47:30 PST 2013

--- On Fri, 8/2/13, Bill Booth <ve3nxk at gmail.com> wrote:
> Its been a while and I need to be refreshed.  When using the sats 
> linear transponders how does the transmit receive work.
> Does the transmit stay on frequency and tune the receiver
> for best receive, or does the receiver stay and transmit
> frequency changes for best receive.  Or do both move if
> your rig supports a satellite mode.

There was a article on that some years ago but I'm lost the URL, anyone know it ? 

The conclusion was keep the receiver frequency steady and tune the transmitter.

> Also I am hearing what I believe is both USB and LSB on the
> birds.  Is one sideband considered to be standard.

USB is the standard for the Downlink. 

The sideband used for the uplink depends on whether it's an Inverting transponder or not. AO-7 Mode A would be USB uplink but AO-7 Mode B would be LSB uplink.

73 Trevor M5AKA

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