Software part of the QO-100 satellite terminal. The first geostationary amateur radio transponder (P4-A) on Es’hail-2 is a joint project by the Qatar Satellite Company (Es’hailSat), the Qatar Amateur Radio Society (QARS) and AMSAT Deutschland (AMSAT-DL). https://amsat-dl.org/eshail-2-amsat-phase-4-a/
The whole transverter (terminal) is connected to ICOM-7000 serving as IF on 70cm. PLL is switched between 1966MHz and 51.5(6)MHz for T/R. The latter goes to /2 prescaler end enters LNB PLL ref input as 25.78(3)MHz. A small Arduino controller is connected with ADF board and watches the PTT line.
Schematics diagram:
Dish feed:
