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General Scanning Discussion - For general questions not specific to a model of scanner or general discussion of use of a scanner. Manufacturer specific posts should be directed to the appropriate forums below and location specific posts should go in the appropriate regional forum..

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Old 12-06-2017, 5:30 PM
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Default Why am I getting these out of band signals

My AOR 82090 MK3 (unfortunately, just a stock telescoping antenna) is tuned to 145.8000 Mhz WFM, as I am trying to get ISS SSTV. Nothing yet from the passes, but when I play back the mostly static audio, I pick up a lot of weak signals of what sounds to be FM radio. Sometimes, more than one signal comes in at a time.

Why am I getting this? Could this crap be causing me not to pick up what I want to?

Here is a clip of what I am talking about:


https://soundcloud.com/user-437184959/interference

Thanks
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Old 12-06-2017, 6:18 PM
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I've never tried to pick up ISS but I suspect you need a more directional antenna. The stock antenna is going to give you the next county, if you're lucky. ISS is about 250 miles away. Admittedly, it should be a clear shot, though.

Also, I think they only transmit intermittently.
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Old 12-06-2017, 7:30 PM
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Yes, KK4JUG is correct. The ISS does not transmit SSTV often. I is unlikely you'll hear anything on an inside antenna...........except the FM stations overloading you receiver!
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Old 12-06-2017, 8:24 PM
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It is transmitting now:


https://amsat-uk.org/2017/11/29/slow...space-dec-5-6/
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Old 12-06-2017, 11:21 PM
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Just heard it as well and they were going to.
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Old 12-07-2017, 12:14 AM
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You'll have much better success receiving the ISS if you use a circular polarized antenna, commonly known as an "egg beater" due to the fact that it mostly looks like one. These antennas aid in tracking a satellite or, in this case, the ISS through the sky without using a beam antenna and, to some degree, compensating for the Doppler effect.

Good luck,
Jim - W8LGZ
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Old 12-07-2017, 4:44 AM
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If you didn't notice the interference while listening live it is probably AM detection from the recording cable that pick up local AM stations. Put a ferrit core on the cable. https://www.amazon.com/s/ref=nb_sb_n...ds=ferrit+core

/Ubbe
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Old 12-07-2017, 5:51 PM
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Quote:
Originally Posted by dragon48 View Post
..... is tuned to 145.8000 Mhz WFM
As for monitoring the ISS SSTV, I do just fine with a simple quarter wave ground plane.
But I noticed something you said, you were tuned to 145.800 WFM?
That might be a problem right there, amateur radio does not operate WFM.
If anything just set you radio to FM or NFM (narrow FM) which would probably eliminate your faint FM Station audio.
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