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Interference

PostPosted: Mon May 14, 2018 4:02 pm
by Kazzaw
Hi guys,

Currently running a decoding setup using a SDR however my local area (have recently moved toowoomba) however on tuning into 148.6375 I appear to be picking up dual broadcast/echos (I can see 2 of the same streams probably 1mhz apart in the waterfall) which is causing havoc in PDW. I can get 148.5something perfectly. Any clues?

Re: Interference

PostPosted: Tue May 15, 2018 6:34 am
by dazz1975
Maybe get a directional antenna?

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Re: Interference

PostPosted: Tue May 15, 2018 8:47 am
by Blake
Yeah, the possibility could be that you are in proximity to two towers / transmitters, and are receiving both, at slightly different times / frequencies. You might be too sensitive / omnidirectional. As dazz said, try a directional antenna (like a tv antenna) and point it at one one the towers.

Re: Interference

PostPosted: Tue May 15, 2018 2:31 pm
by Boort8720
I use an old rectangular grid VHF TV antenna, which I have pointed in the general direction of my closest transmitter. I also run a TV Booster as I am quite some distance from the transmitter. Works a treat, 100% decode rate all day, everyday.

Re: Interference

PostPosted: Tue May 15, 2018 4:22 pm
by Kazzaw
Yep seems like its interference from the two close.

I've bumped the freq a little and adjusted my antenna, still getting both but can now decode with less issue

heres what I'm seeing https://drive.google.com/open?id=1d9pNd ... -iooHqMi9K