John, Sounds like a good plan! But we probably need a "system" command decision - right?? Is this something project management can buy into, assuming we don't run into serious issues with space or weight? Don't think power would be impacted since the spare unit would be in a power down mode. John B. Stephensen wrote:Since only UV supports the text mode with omnidirectional ground station antennas and this is the only linear transponder that operates over 75% of the orbit, I hope that we can fly two V transmitters and 2 U receivers. Each pair of receivers and transmitters could then connect to their gain and omni antennas via a transfer switch so that there is no single-point failure mode. 73, John KD6OZH ----- Original Message ----- From: "Lyle Johnson" <kk7p@wavecable.com> To: "Bill Ress" <bill@hsmicrowave.com> Cc: "EAGLE" <eagle@amsat.org>; <K3IO@verizon.net> Sent: Tuesday, April 10, 2007 20:00 UTC Subject: [eagle] Re: Eagle 10 MHz ClockHello Bill!In regards to the RF distribution circuitry, I count 8 users of the 10 MHz clock. Help me out here if I missed one.... 1) V Transmitter 2) U Receiver (maybe two?) 3) L Receivers (two) 4) S Transmitter 5) S2 Receiver 6) C Transmitter 7) IHU 8) Spare (for X or K beacon or a "contributing" customer)(9 and 10) - SDX processors 73, Lyle KK7P _______________________________________________ Via the Eagle mailing list courtesy of AMSAT-NA Eagle@amsat.org http://amsat.org/mailman/listinfo/eagle