Help w/Trunk Scanning!

Help w/Trunk Scanning!

Post by Ralph Kotos » Sat, 02 Oct 1993 01:12:36

I've had an old RS PRO-2021 scanner for awhile.  Due to its limited
frequency coverage, never had an opportunity to scan trunk systems.
Well, I broke down and purchased a PRO-43.  I really like it, though
its 46Mhz reception is much worse than the 2021.  Anyway, I programmed
my new scanner with the Denver Police 800Mhz trunk system frequencies.
While the scanner picks them up, this whole thing is frustrating.

Since I'm new to trunks, I was wondering if anybody could answer
the following:

        1)  How do you follow a conversation as the frequencies seem
            to change with each key up?

        2)  How do you avoid those obnoxious tones (kind of sounds like
            modem connections only harsher)?  These seem to skip
            around also.

Automatic scanning for trunked systems seems to be difficult at best.
I liked being able to turn it on in the background and wait for
something to happen.  Can't seem to do that here.  

Any help would be greatly appreciated!

R

--
Ralph Kotoski                          Hewlett-Packard PSO
Senior Technical Consultant            Neely Sales Region
Performance Specialist                 24 Inverness Place East


                                  :^)

DISCLAIMER:

Speaking for me, myself and I.  And, we are not speaking for HP!

 
 
 

Help w/Trunk Scanning!

Post by My name is. » Sat, 02 Oct 1993 23:45:13



>Since I'm new to trunks, I was wondering if anybody could answer
>the following:

>    1)  How do you follow a conversation as the frequencies seem
>        to change with each key up?

Well it works best to only scan the 5,10,15,20,or 25 channels that make up
your system. Don't have delay set. If it is a busy system you will probably
need to hit the scan button to find the correct repeater if there are
multiple conversations going on

Quote:

>        2)  How do you avoid those obnoxious tones (kind of sounds like
>        modem connections only harsher)?  These seem to skip
>        around also.

The data channel usual moves every n hours. Some systems move every 12 hours
some every 6 and others 24. Just lock it out and forget about it. When it moves
just lock it out and unlock the previous one. The reason it moves is so that
one repeater doesn't run constantly for months.

Hope this helps.

The other option is contact the PS agency and see if they will program a
compatible radio for you. Of course you have to be willing to spend
the $2000.00+ dollars for one.

Don

 
 
 

Help w/Trunk Scanning!

Post by Gordon Berl » Sun, 03 Oct 1993 02:40:04

        Just as an addendum to Dean's reply, be aware that some radio  
dealers will program the radio like that, only they will not allow you to  
transmit on it.  Sort of turns it into a job specific, very expensive  
scanner, and also keeps you out of trouble by not being able to transmit.

Gordon Berlin

Allegheny College
Meadville, PA

 
 
 

Help w/Trunk Scanning!

Post by Matt Rober » Sun, 03 Oct 1993 05:15:08

I'm thinking of moving up in the world of scanning and was wondering
if those of you out there, that know the phone numbers to some of the
electronics warehouses, could post or e-mail me some phone numbers to
get catalogs from various warehouses.

Also if anyone out there knows how I could get a hold of a Gall's
catalog please post that as well.

Thanks,

Matt


 
 
 

Help w/Trunk Scanning!

Post by Vance Strickla » Sun, 03 Oct 1993 00:37:04

Quote:>   Since I'm new to trunks, I was wondering if anybody could answer
>   the following:
>       2)  How do you avoid those obnoxious tones (kind of sounds like
>           modem connections only harsher)?  These seem to skip
>           around also.

Actually, there is a company called Comsec Associates, Inc. that has a device
that supposedly eliminates the tones that are used on the Ericsson/GE trunked
radio systems.  (Don't know if that is what the agency your listening to has or
not.  I think there are at least 3 major players for trunked radio systems.)

Anyway, the device is called an SA-78E and it basically knows the tones used on
that trunk system and when it "hears" them it mutes the reciever so the scanner
can scan again.  It can get caught apparently if it comes in in the middle of
the set of tones, however it will supposedly recognize them in around 200
milliseconds and then continue on again.  From what I've heard they've got
versions for the PRO-2005 and PRO-2006 scanners currently and are working on
the mods to work with other scanners.

Info I've got on them is that the SA-78E runs around $29.95 + shipping if you
want to install it yourself.  If you want them to do installation it runs
around $50 + shipping.  The company is
        Comsec Associates, Inc.
        2219 West Olive Ave. #300
        Burbank, CA 91506
        phone (818) 502-0000
        fax   (818) 566-1365

NOTE: I don't have this device, so I don't claim that it works or anything like
that.  Also, I'm not affiliated with the company, etc...  Just passing on what
I've heard.

#include <stddisclaimer.h>
   BCNU,
   Vance Strickland


Computation Center              UUCP: ...!cs.utexas.edu!ut-emx!strick

Phone: (512) 471-3241           THEnet: UTXVMS::STRICK
--
   BCNU,
   Vance Strickland
   "We await with interest the MIME type for sending something useful
    through email, like pizza."
                        - Bud


Computation Center              UUCP: ...!cs.utexas.edu!ut-emx!strick

Phone: (512) 471-3241           THEnet: UTXVMS::STRICK

 
 
 

Help w/Trunk Scanning!

Post by David Sta » Mon, 04 Oct 1993 00:10:02


 > Organization: Plymouth State College - Plymouth, NH.

 > Also if anyone out there knows how I could get a hold of a Gall's
 > catalog please post that as well.

    That's easy.  Call 1-800-477-7766.

    Now, if somebody can tell me how to STOP receiving the Gall's catalog...  
 :-)

 
 
 

Help w/Trunk Scanning!

Post by C. Mark DelSest » Mon, 04 Oct 1993 05:34:44

Okay here are a few scanner company phone numbers:

Metro West  800 - 657 - 1475
Scanner World USA  518 - 436 - 9606
Grove  800 - 438 - 8155

and also
Galls  800 - 477 - 7766

Mark

 
 
 

Help w/Trunk Scanning!

Post by Chris Yod » Fri, 08 Oct 1993 04:01:03


-*>  1)  How do you follow a conversation as the frequencies seem
-*>      to change with each key up?
        You can't unless you buy a GE made scanner for about US$1300.  This is
one of the reasons that Denver went with a ge system, so it WOULD be harder
to listen to.   Some of the Motorola Systems will hop a lot less, and are
much easer to listen to.
-*>
-*>        2)  How do you avoid those obnoxious tones (kind of sounds like
-*>      modem connections only harsher)?  These seem to skip
-*>      around also.
        These are test tones, used to make the system harder to scan.  They
can be turned pff, but Denver doesn't want to, In spite of the fact that
DPD officers have complained about them.  They aren't supposed to leak
through on a GE portable, but they do, and the officers have complained
about their radios farting at them.

Newsgroups: rec.radio.scanner
Subject:
Summary:
Expires:
Sender:
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Distribution:
Organization: Univ. of Colo, Health Sciences Center
Keywords:
Cc:

Newsgroups: rec.radio.scanner
Expires:

Sender:
Followup-To:
Distribution:
Organization: Univ. of Colo, Health Sciences Center
Cc:
Subject: Re: Help w/Trunk Scanning!
Summary:
Keywords:


-*>  1)  How do you follow a conversation as the frequencies seem
-*>      to change with each key up?
        You can't unless you buy a GE made scanner for about US$1300.  This is
one of the reasons that Denver went with a ge system, so it WOULD be harder
to listen to.   Some of the Motorola Systems will hop a lot less, and are
much easer to listen to.
-*>
-*>        2)  How do you avoid those obnoxious tones (kind of sounds like
-*>      modem connections only harsher)?  These seem to skip
-*>      around also.
        These are test tones, used to make the system harder to scan.  They
can be turned pff, but Denver doesn't want to, In spite of the fact that
DPD officers have complained about them.  They aren't supposed to leak
through on a GE portable, but they do, and the officers have complained
about their radios farting at them.

--
This whole politicaly correct thing is a violation of the first amendment,
don't let the greens dictate what you think.  Think for Your Self!!
           --Chris Yoder

 
 
 

Help w/Trunk Scanning!

Post by Ralph Kotos » Thu, 14 Oct 1993 03:42:32

Interesting!  I'm curious how you found out about this.   BTW, thanks to
everyone who responded to my original post both here and via e-mail.
Everything was a great help and now, I can at least listen a little
more effectively.

R

--
Ralph Kotoski                          Hewlett-Packard PSO
Senior Technical Consultant            Neely Sales Region
Performance Specialist                 24 Inverness Place East


                                  :^)

DISCLAIMER:

Speaking for me, myself and I.  And, we are not speaking for HP!