On 1/28/21 12:04 PM, Alan Rich wrote:
for the Fox 1E transponder LO or something other than just the beacon. Is there a detail block diagram available of the transponder that would call out the LO frequency ? (I'm guessing 581.65 MHz if its a single conversion) or any details of the passband filtering? Maybe there is enough LO leakage out the front or back end of the transponder to receive. If there is an AGC/ALC, the TX might be putting out a noise bump that could be seen by the SDR also.
I did not see the linear transponder design or a block diagram in any of the Symposium Proceedings that I have, but someone else on the list might know if this design was ever released as part of the ITAR "data dump" in the Proceedings.
73,
--- Zach N0ZGO