One more nOOb question on trunking

[nyquiljunkie]

I did search for this one but I couldnt find an answer....
So if you have a list of 800 freqs for a trunked system some dept is using, if you just scan them normally (on fm or CT search, or no setting) will you hear anything on those freqs when they are used?

I understand the conversations would be hard to follow but.....
will you pick up the transmission (talking) or would you just hear a lot of "fax-noise" and buzzing noise?

I scanned the 800 range and I get a lot of stops on just "noise"..... buzzing, beeping hissing, fax-type noises....
(dont you love noobie lingo?)

Probably an easier question is are trunked frequeny transmissions on each frequency voice, or scrambled noise the scanner has to convert?

I'm working my way thru the wiki section on trunking so be patient with me.
I'll have to read it a few times before he concept sinks in.

[W4KRR]

Originally Posted by nyquiljunkie

I did search for this one but I couldnt find an answer....
So if you have a list of 800 freqs for a trunked system some dept is using, if you just scan them normally (on fm or CT search, or no setting) will you hear anything on those freqs when they are used?

Yes, you will hear clear voice, assuming the system isn't encrypted.

Originally Posted by nyquiljunkie

I understand the conversations would be hard to follow but.....
will you pick up the transmission (talking) or would you just hear a lot of "fax-noise" and buzzing noise?

Talking. Unless it's a control channel, then you would hear an ideling diesel engine type of noise

Originally Posted by nyquiljunkie

Probably an easier question is are trunked frequeny transmissions on each frequency voice, or scrambled noise the scanner has to convert?

It's clear voice.

Originally Posted by nyquiljunkie

I'm working my way thru the wiki section on trunking so be patient with me.
I'll have to read it a few times before he concept sinks in.

[nyquiljunkie]

Thanks, that does make alot of other things make sense....

You would set the scan for basic FM mode, correct?

ideling diesel engine type of noise, yes I've hear that on a few.

thanks for the input... I appreciate it!

[W4KRR]

Originally Posted by nyquiljunkie

Thanks, that does make alot of other things make sense....

You would set the scan for basic FM mode, correct?

ideling diesel engine type of noise, yes I've hear that on a few.

thanks for the input... I appreciate it!

If you set the scanner's mode to FM, you can receive the transmissions conventionally, but the scanner will not trunk track the conversations. If you want the scanner to trunk track, set the mode to "MO" if it's a Motorola system. (I assume you have a PRO-96 or 97?)

[nyquiljunkie]

I have a 2055, same difference.
I bought a 97 too but it hasnt got here yet.

Between the manual and the easy to read manual and the wiki, I'm pretty screwd on the trunking-programming.
In time I'm sure I will catch on in time.

If I set the mode to MO (assuming that ones list is for a motorola system) on a 97 or a 2055, as I read that wont make the scanner trunk track the conversation.... theres a whole bunch of other stuff it wants, (ID#s and fleet map settings)...
( know the thread is drifting out of this forums scope, but... what can I say? lol)
Just filling a bank with a your local PDs trunking freq list and setting them on MO will allow it to trunktrack the conversation without the fleet map & ID#?

Thats one of my current confusion points reading the manuals, it wants additional data I have no idea as yet how to get. (fleet map group ID#s ect ect)

Unless it will just figure it out on its own set to MO
as I read it isnt that simple.

My small area here has a list of 800 freqs for my town but set to FM, those freqs are silent all the time but for a few of them with noise going on now and then, no voice at all.
I assume, they arent using them yet.

I found them on the page "Display All FCC Licenses in Washington County Pennsylvania" in the data base here.
Not sure why they would have a list of 800's on there, listed "YF" (Public Safety Ntl Plan, 821-824/866-869 MHz, Trunked)

The place has only 3 police cars as far as I know and its a pretty quiet place as far as police traffic goes, its not like the airwaves are choked here with police calls.

Or is everyone everywhere going this trunking route even if they "dont need it" ?

I think I head the local PD break radio silence today a half dozen times at best.

I think I missed some basic point of rebanding/trunking or something.

Time to go back to reading and searching!

[DickH]

Originally Posted by nyquiljunkie

I think I missed some basic point of rebanding/trunking or something.

Here is a simple explanation of trunking you may find easier to understand.

Motorola Trunking:
The object of trunking is to allow many users to share a relatively few frequencies.
A trunking system is controlled by a computer. Information (data) is exchanged between the system radios and the computer on a control channel, sometimes called a data channel. It sounds like a strong buzz.
A large system can have up to 28 freqs., 4 of which may be used as control channels. The control channel may be changed once a day or as often as the programmer decides. Some scanners need only the control channels to track the entire system Just put in the 4 Control Channels.

Each group of users (Fire, Police, etc.) is assigned TALK GROUPS. In a Motorola Type II system, the most common type, TGs are usually in 32 number steps starting with 16 and going up to 65536; 16, 48, 80 --- 4656, 4688, 4720 --- 28944, 28976, etc. System radios can have more than 100 TGs programmed into them.

Use the Talk Group numbers in the DEC column, not in the HEX column.

When a user pushes the talk button on his radio, data is sent to the computer. The computer chooses an unused freq. and sends that data to all the radios using the TG of the originating unit. This all happens in a fraction of a second and it happens EVERY time a radio is used.

EXAMPLE:
Fire Dispatch calling Engine 4 (TG 4528 on 856.7125)
Engine 4 answering Dispatch (TG 4528 on 867.2625)
Respond to 73 Elm Street (TG 4528 on 855.9625)
Engine 4 responding (TG 4528 on 858.4375)

If you have entered TG 4528 into your scanner, it will decode the control channel data and change your scanner freqs. to follow the conversation on TG 4528.

This should get you started, but you should read the manual carefully. You may need to read it several times.

[nyquiljunkie]

I had to read that a few times but I think I am starting to get the idea....
thanks!

on an FCC dataa page like this
http://www.radioreference.com/module...fcc&cs=WQGP762

is there a reference page to explain the column tags?
code and svc I found pages for but whats mob, pag, and emission?

I'm going to subscribe, some of those perks will help alot.

[n2mdk]

These 2 links will help with the Emission type on that page you had linked to was 20K0F9W Which is basically an FM carrier with a combination of digital and analog information.

http://www.ominous-valve.com/emission.txt
http://wireless.fcc.gov/services/ind...trial_business

Those other things I'm not sure of

[DickH]

Originally Posted by nyquiljunkie

... on an FCC dataa page like this
http://www.radioreference.com/module...fcc&cs=WQGP762

That looks like part of the Pennsylvania state-wide system. That is a MA/COM system and can not be monitored by any scanner.
You had better ask about it on the Pennsylvania forum.

[nyquiljunkie]

Gotcha.

Thanks for the input.

That is a MA/COM system and can not be monitored by any scanner YET.

Nothing stays uncracked for long. by the time a system is in full swing its already obsolete.

give it time.
lol

[W4KRR]

Originally Posted by nyquiljunkie

Gotcha.

Thanks for the input.

That is a MA/COM system and can not be monitored by any scanner YET.

Nothing stays uncracked for long. by the time a system is in full swing its already obsolete.

give it time.
lol

Read this thread here for some insight on this.

http://www.radioreference.com/forums...ead.php?t=8408