I recently got a Uniden BC75XLT scanner and a Diamond RH77CA antenna. I have been trying to listen to amateur radio satellites, but I have had no success. I always to listen to the downlink frequency at the right time, I have tried increasing and decreasing the frequency by 10 MHz, and I turned off the squelch, but I still hear almost nothing. I think I can hear very faint voices when I point the scanner in the right direction. I have been doing this on a small college campus, and I once tried going to the second floor balcony of a building there, but I still wasn't able to hear much from up there. Any advice on how to receive a clear signal?