[amsat-bb] Question about PL/CTCSS on uplink

Jerry Buxton n0jy at amsat.org
Sat Feb 3 20:12:06 UTC 2018

Kinda problematic with CW?

Jerry Buxton, NØJY

On 2/3/2018 09:45, Philip Jenkins wrote:
> I understand why FM satellites need an PL tone on uplink (to keep out
> land-mobile services, like taxi-cabs, etc), but why is a PL not required
> for the linear sats utilizing the same frequencies? A linear transponder is
> certainly capable of receiving/transmitting an FM signal (albeit not
> successfully demodulating that signal).
> This question came up at a satellite presentation I did, and I had never
> thought about it. ( Moreover, will radios even transmit a PL on SSB/CW
> transmissions?)
> Philip N4HF
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