SDS100/SDS200: Simulcast distortion?

[NS9710]

I have been noticing on my SDS100 that I have been noticing the local P25 Simulcast system has started to lose the signal/distort on transmissions, I use the Remtronix 920S, the system is a 400MHz system, but it doesn’t do it all the time, but I’ll notice it starts to garble the signal with the RSSI at -95 and works all the way up to -115 with increasing garble. Is this just me or is anyone else having this issue? I live within 3 miles of 3 of the simulcast towers.

 

[nessnet]

You problem probably isn't related to simulcast. (The SDS100 can handle multipath interference caused by simulcast fairly well).

If you are indeed within 3 miles of 3 tower sites, and getting up to -115, (quite low signal), it sounds like some sort of RFI is causing problems. Remember, the front end of the SDS100/200 is quite wide and any strong signal anywhere close to the target frequency can de-sense the radio.

Have you purchased and installed the waterfall feature? It will show you graphically if there is some other RF that may be interfering.

 

[NS9710]

Not yet, I’ve been wanting to, I just haven’t gotten around to it.

You problem probably isn't related to simulcast. (The SDS100 can handle multipath interference caused by simulcast fairly well).

If you are indeed within 3 miles of 3 tower sites, and getting up to -115, (quite low signal), it sounds like some sort of RFI is causing problems. Remember, the front end of the SDS100/200 is quite wide and any strong signal anywhere close to the target frequency can de-sense the radio.

Have you purchased and installed the waterfall feature? It will show you graphically if there is some other RF that may be interfering.

 

[ofd8001]

The SDS line of scanners does handle simulcast quite well, but it is not perfect. I'm still getting a wee bit of garble in certain places.

I'd take the scanner away from your home 1/4 mile or so and see if the issue goes away. If it does, then go back home and start eliminating sources of de-sense.

 

[buddrousa]

Have you tried the Attenuator to see what happens