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Pluto 4ms
Posted: Sat Mar 25, 2023 2:48 pm
by M0PAI
Does the pluto PD4 work 4ms symbol rate to use on 23cm repeaters?
Re: Pluto 4ms
Posted: Sat Mar 25, 2023 3:14 pm
by G8GKQ
I have just tested a Portsdown 4 with a USB-connected Pluto, and it will not transmit 4MS H264 FEC 1/2 DVB-S2. It was designed for much narrower signals.
However, to my surprise, it does work with 4MS H264 FEC 1/2 DVB-S. So you should be OK as long as the repeater accepts H264 video.
Dave, G8GKQ
Re: Pluto 4ms
Posted: Sat Mar 25, 2023 3:48 pm
by M0PAI
Thanks Dave,
The repeater I want to try is GB3UD, how do I check if it accepts it or is it just a case of try?
Someone on the FB group mentioned a modulator board for the PD but not sure what that does.
Cheers
Adrian
Re: Pluto 4ms
Posted: Sat Mar 25, 2023 4:08 pm
by G8GKQ
Adrian
Just try!
The Portsdown 2020 would use a Filter-modulator board together with an ADF4351-based local oscialltor to generate 4MS DVB-S signals before the software to drive SDRs such as the Lime and Pluto was widely available. However, you clearly have a Portsdown 4 which is not compatible with the Filter-modulator board.
Dave