Originally Posted by scanman1958
I have only about 8 "sites" programmed in my 396xt for MOSWIN. But I think I am having a conflict with two of them. They are site 309 (madison co) and site 327 (jefferson co). I hope I can explain. I am in St Louis so I really should not be able to pick up site 309 but it's alternate cc is 152.6100 and I am receiving data on that channel (actual data noise but no traffic) It shows up on my screen as site 327 not 309. Jeff co site 327 which I can hear well is using cc 152.6000 and it shows up correctly as site 327.
My question is, "are 152.6000 and 152.6100 close enough to be heard as the same channel on the 396xt, or any scanner?" I didn't think so. But I think I am probably wrong. Anyone with any ideas?
Yes, you will pickup Imperial's CC on 152.610 even though it's true frequency is 152.6000. Scanners in general do not have very tight front ends even when in the so called NFM mode.
What I'd do is remove 152.610 from site 309 in your programming. That way it should still get all of 309 when you are in that area providing they are using the primary control channel which I think they are for that site.
You would lose site 309 if they did switch to the alternate. I've not seen many of the sites switch to the alternate CC's after zone testing was completed. And when I did see a switch to the alternate, it was only for a matter of minutes.
Or maybe a better idea would be to just lockout the entire site 309 when not in range and unlock it when you travel down that way. I've only been able to copy 309 a few times from my location when conditions were very good. And they were using the primary control channel when I was able to copy that site.
That is also a trick if you are getting interference on say 152.600, try programming the sites control channel 5 or 10 kHz above or below the true frequency and you can sometimes get far enough away from an interfereing signal to allow reception. That trick sometimes worked very well for good ole analog signals but not sure how well it works on a P25 signal. The fact that you are decoding Imperial when the scanner is tuned to 152.610 does tell me the trick does still work though.
Then you should have the IF shift feature that you could also play with and see if you can get 152.610 even further away from 152.600 so it would still allow proper reception of 309. Or you could try programming 152.610 as 152.615 and see if it then stops showing site 327. Of course you would need to wait until they used the alternate CC to see if it still decoded correctly.
I'm not postitive the 396XT has the IF Exchange feature like the 996XT does but I think it does. I've never needed to use that feature so I have no idea how far you can tweak the displayed frequency from the true frequency but it may be just enough to stop decoding site 327.
I think for simplicity, I'd just lockout site 309 when not in that area.
I sometimes let my 996 scan ALL MOSWIN sites just to see if conditions are good and I'm getting any distant sites. Sometimes I do pickup sites in Troop I and F's region's from here in St. Louis. I generally lock all out other than the few sites I can get every day with good signals though. A lot of frequencies are duplicated across the state as can be seen if you try and scan all sites.
I find MOSWIN much easier than Starcom but maybe because there is not a lot of MOSWIN use yet. I also lost reception here on almost all Starcom sites other than the Madison County Starcom site. I monitor that site a lot and am always amazed at how many talkgroups do appear on that site.
When you are searching the Weldong Spring and Imperial sites, keep your ears open for Sikeston. I see Sikeston in the clear talkgroups pop up on both those sites pretty often. Much like you are seeing Troop E comms appear on Weldon Spring or Imperial! It's hit and miss but some days I've been blessed and heard most of Sikeston's traffic for an entire day.
I suspect they will tighten that up at some point as that is what the travel talkgroups are really for. You don't really want an officer or dispatcher in Sikeston keying up repeaters across the entire state all day long. I'd think they will start denying access to certain radios or talkgroups so they can only affiliate with the sites they really need.
The other day there was a talkgroup out of Lincoln county that was also being heard all around the KC area. And it appeared to be tactical ops at that.
It's really neat hearing the far away talkgroups but that will bring the system to its knees if a lot of users can key up repeaters across the state. I guess that is all part of the testing phase but it is neat hearing!