[AMSAT-BB] Re: MIR-SAT 1 Digipeater open for the WE

On 10/15/21 11:34, Jean Marc Momple wrote:

The MIR-SAT 1 digipeater has been open for the WE in spite not yet tested.

It is a bent tube at 9k6 GMSK, whatever in - same out, uplink 145.9875 MHz and downlink 436.925MHz.

I am confused, Jean Marc: The term "bent tube" or "bent pipe" is usually reserved for satellites which do no demodulation of the uplink and re-modulation of the downlink signal. They simple translate a passband of frequencies.

Does the satellite demodulate GMSK and then modulate GMSK on the downlink, or is it a true "bent pipe" (or linear translator)?

Thank you,

--- Zach N0ZGO