SO-67 is in a mode whereby the uplink audio is repeated as long as the transmitter is turned on. If there is no PL on the uplink, repeated audio will be reduced by about 10db compared to rx noise when no satellite is in view. SO-67 is being turned on for 15 minute periods as conditions permit.
If you transmit PL, the repeated audio level will be 10db higher than with no PL, however the PL tone level will also be very high. There is apparently no tone filtering between the receiver and the transmitter. Once you stop transmitting with PL, you will hear rx noise at full deviation. After 2-1/2 seconds or so, the repeated noise/audio level will once again be 10db down. As mentioned in another post, the best way to operate given this configuration is not to use PL and work with the low audio. Since this bird is very strong, low audio is not a big problem. If there are signals with PL, the audio level will jump up 10db so watch your ears. 73, John K8YSE _______________________________________________ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
