I come from the HOPE-1/HO 68 Web site : I read all ON/OFF date/time for the transponder operation Wonderful !! . Why it is not possible for the ISS AMSAT Station . The ISS AMSAT Station is used mainly for ARISS/public relation purpose ( and some time personnal purpose ) . It is a Ham equipement payed by ham subscription and NASA/ESA/AMSAT agreement . In the minimum after programing the stuff ..... Transponder mode is automatc ! If SOME TROUBLE IN THE EQUIPMENT TELL US ! Best 73 for all . Bernard FY1LE