Easy to sharply filter the input passband etc...
For example a 1MHz section of 23cm band at 1249MHz as the 'input' and another 1MHz section at 1304MHz as the 'output'.
Users could use an sdr to monitor the output and tune to signals as they come in, or just use pre-defined channels withing the 1MHz section.
An on-site beacon could be transmitted at 333Ks just like QO-100 does.
A LOT less hardware involved!!
Licencing it would be a whole new thing as I've not even heard of anything like this mentioned before now...
Is this a possibility for the future?
I think we should work up a proposal and as BATC Spectrum forum rep and also ETCC TV manager, I'd be happy to take it through "the system" and see where we get to.
First thing to determine would be what band to operate on - I guess it could even be cross band - and suggest we would start with a small deployment from an average site before putting it at a real repeater site.
70cms is probably not the band of choice due to the primary user who may not want their signals repeated.
23cms is a possibility but I wouldn't want to encourage people to invest too much time and money in anything below 1300 MHz.
13cms and 3.4 could be possible...
I'm sure BATC would support any development as it is something that pushes the hobby forward.
Noel - G8GTZ
Receiving and locking onto incoming signals is not an issue now with longmynd but re-muxing them is not going to be a straightforward task, although a totally viable option.
Having it purely a bent pipe was the main interest due to lowest cost and power consumption - A single raspberry pi and a pluto for example.
A bit of GNURadio trickery will get things going quickly.
I think later this year I'll have a go at building a system (probably try both bent pipe and re-muxing TS) and try some tests from my QTH and see how it goes, should be fun!