Try using Narrow FM instead with a bandwidth of 20 or 25 kHz. WFM is typically used for FM Broadcast radio reception and as you have discovered does not work well for packet radio.

de KM1P Joe

________________________________________ From: Derrick Lau via AMSAT-BB amsat-bb@amsat.org Sent: Tuesday, September 19, 2023 5:03 PM To: amsat-bb@amsat.org Subject: [AMSAT-BB] FW: Radioing the ISS using SDR#

Good evening all:

I am trying to listen to packets transmitted from the ISS on 145.825 MHz using both a horizontally and vertically polarized 1m dipole. I use RTL-SDR blog USB SDR device plugged into my Windows 10 laptop running SDR#, AGW Packet Engine, and UISS. I configured my SDR# to use WFM, no shift, filter Hamm-Poisson, bandwidth 600 kHz, order 500, no squelch. I had the output of SDR# sent to my speaker port, which I plugged into the microphone in port of my USB soundcard that AGW Packet Engine was attached to. I also had QTMM packet reader listening to that soundcard too. I did not see any packets come through, which makes no sense as receiving data packets when the ISS passes overhead should be easy, right?

Would you have any idea offhand as to what I did wrong please?

Thanks, Derrick VA3LGT