BCD436HP/BCD536HP: P25 adjustments bcd536

ofd8001

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Joined
Feb 6, 2004
Messages
8,097
Location
Louisville, KY
Best reception I got on a simulcast system is when I had a broken antenna cable. . .

I too have many scanners, including SDS models. If I need a new one, it will be an SDS model because I've noticed significant improvement over non-SDS scanners. They are not perfect as there are a small number of hotspots where audio is garbled. However wearing my fire service hat, I have a "real" system radio and it has the occasional issue too.

It doesn't matter whether you start with a high or low number when experimenting. To do it justice, you'll end up trying several - every other one until you get close, then one by one.
 

Ubbe

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Sep 8, 2006
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9,826
Location
Stockholm, Sweden
What you should do are to try and receive just one site as other sites operates on the exact same frequencies and will cause interference. There are different ways of doing that. If a paper clip works then that probably equals to enabling the attenuator setting in the scanner, that can be set only to that site and still have all other systems un-attenuated.

Other ways are to try and block the signal to other sites directions. Maybe using a directional antenna to a site that doesn't have other sites too close to it or in front or behind it, but probably still needs the signal to be attenuates enough to not let other sites dominate too much. An adjustable attenuator are then the best option to use. For a portable scanner you can lay it down and point its antenna at the direction where you want to receive the least amount of signal, or angle down a telescope antenna at the back of a scanner and try to do the same. trying to make one site be considerable more dominant in signal strength than other sites.

If using different threshold values you then can copy and paste the site to get duplicates and set different manual threshold settings to them and switch between sites in site selection mode to check what works best for you. If you copy the whole system and make a new one and set the same quick key number to it so both systems ends up next to each other, you can just turn the selector wheel to continue scan to the next system with that other setting and then turn the other direction to come back to the first system and compare again.

/Ubbe
 

crippledchicken

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Joined
Dec 28, 2004
Messages
978
Location
Butler County MO
You own all of those? Wow! Hey, I have something you don't, pro-2006 with cellular unblocked. Only problem with it is the screen is dark now. When they started trunked systems I got the pro-2050. That is an impressive list.
I had a pro-2006 years ago. I did a lot of the mods to it from the old Bill Cheek book. Wish I still had it.
 
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