Tracking Type II Sys./ T4Win

[joegen62]

OK. I got T4Win up and running. Now I have a Motorola Type II system that uses the 400 Mhz band. My BC245 is setup to track this system with the default base and offset frequencies bcuz none is listed in the data base. I get traffic on the computer but can not hear it on the scanner. I think the default values are incorrect. So is there a way to to calulate these values from the information in T4Win. I tried using MTrunke32 But It seems to be too complicated and I Can't find a easy tutorial on how to interpret the information.

 

[DaveH]

If the default base/offset/step is 406.000/380/12.5 it will definitely not work on most UHF systems.
Which system are we talking about (refresh my memory...)? T4Win can give the channel numbers which can be used to calculate the parameters, which may be multiple ranges. More details would help.

Dave

 

[joegen62]

The System I'm working on is the Windsor Ford Motorola Type II Smartnet.
As listed in the RR data base The System Freq. Are as follows:

-451.0375
-451.6875 *
-453.0625 Control Ch.
-460.2125 *
-462.9125
-464.8875 *

* Alternate control Ch.

- Connect tone is 76.6 Hz and the System ID is 4820 which is identified in T4Win.

As of Today The Control Ch. Is 464.8875 and my BC245 is set for a base of 451.000
and step freq of 12.5 KHz. With all that in mind The T4Win produces results as follows:

LCN - 27,82,168,381,407,462,548,656,735.
735 being the control channel.

also, the TGID that showed up were:

32,112,176,272,304,336,368,528,592, and 1042 with a few more pouring in every few minutes.

I have tried other base freq on a trial and error with no luck.

Well, thats it, hopefully you can make sense out of this. If I could just get the base freq. I could guess at the offset and at least it would narrow it down a bit.

Anyway If I can't get, it sure was fun trying...

Thaks for anything you can come up with.

 

[SCPD]

-451.0375
-451.6875 *
-453.0625 Control Ch.
-460.2125 *
-462.9125
-464.8875 *

As of Today The Control Ch. Is 464.8875 and my BC245 is set for a base of 451.000
and step freq of 12.5 KHz. With all that in mind The T4Win produces results as follows:

LCN - 27,82,168,381,407,462,548,656,735.
735 being the control channel.

Ignore the LCNs less than 380 for this system.

Try this band plan ...

offset / space / base
380 / 25 khz / 451.0125
540 / 25 khz / 460.0125

-rick

 

[joegen62]

Thanks Rick
Will give it a shot !

 

[joegen62]

Well Finally Got it,

Thanks to rfmobile and all the others.
Two weeks in the making and it ended up being the offset of 451.0125 and 25Khz spacing.
After I tried that They just started pouring in.
I happen to work at Ford so I have identified most of the TGID's
Is it possible to submit the TGID and the Band plan to RR.?

Thanks again ity was fun getting it going.

 

[Joseph11]

Doesn't T4Win not work on UHF systems?

 

[SCPD]

No ... check out Uni Trunker which supports VHF/UHF systems quite well. Eventually these improvements will make their way into T4Win.

-rick

 

[DaveH]

Joe,

Even though T4Win doesn't presently "handle" UHF systems, your running it
on the system provided all the critical info that was needed to figure out the range
parameters. I'd suggest submitting the 2nd set of Rick's parameters to the Database;
it will be needed by others.

Regrettably, I don't think the BC245 can handle multiple system ranges.
You'll only be able to partially track, but obviously enough to ID some
talkgroups. You may see "funny" frequencies in the 455-460MHz show up,
the channels above 460MHz which are using the wrong base/offset/step.

You might want to try the following experiment. Change the base frequency to
456.0125 from 451.0125. See if you can track the frequencies above 460MHz
(but then not the ones below 460MHz). This is a trick that may or may not work.
It may depend which range the control channel is in at the time.

Dave

 

[joegen62]

Your right about that ,The T4Win Software was not much help in the UHF range.
I just had to try a little bit of trial and error. The 245 does not support multiple ranges but my 396t will. I will try the experiment and play around with the base frequencies and see where that goes.
Now does the MTrunker32 software also have issues with the UHF band.?
I tried using the software on the UHF but getting numnbers that show up in the 800 Mhz range
I am in the middle of working on another system so I am going to let this one go for now.
Thanks again

 

[Joseph11]

MTrunker32 works fine with UHF, you just need to configure it properly.