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ha7ilm / openwebrx

Open source, multi-user SDR receiver software with a web interface
https://sdr.hu/openwebrx
GNU Affero General Public License v3.0
982 stars 464 forks source link

Hearing audio from across the spectrum #46

Open nzradar opened 7 years ago

nzradar commented 7 years ago

I'm using an RTL-SDR v3 dongle in Direct Sampling mode and tuned to an HF frequency. I hear the signal of interest but I also get audio from signals across the band I'm tuned to!

sq2mo commented 7 years ago

Try applying a low-pass filter between the rtl-sdr and your antenna - helps for FM signals appearing on HF bands. Reducing the gain could also help, but since you're using direct sampling you probably won't have this option.