RadioReference on Facebook   RadioReference on Twitter   RadioReference Blog
 

Go Back   The RadioReference.com Forums > Scanners, Receivers and Related Equipment Forums > GRE Scanners


GRE Scanners - A forum for the discussion of all GRE branded scanning radios and receivers. Whistler branded scanners belong in the Whistler forum.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 01-31-2018, 6:47 AM
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Jul 2008
Location: Beautiful Southern IL
Posts: 19
Default GRE 600 and P25 Conv Channels?

I have an old GRE 600 I am trying to program with Win 500 software. I tried to load some P25 conventional channels into the radio with Win 500 and Radio Reference. They were listed as P25 on RR but when I loaded them into the radio they were FM. There is a modulation drop down in Win 500 but it does not list P25.

Can I somehow change these conventional channels to P25 or does the GRE 600 not support Conv P25?
Reply With Quote
Sponsored links
  #2 (permalink)  
Old 01-31-2018, 8:12 AM
DaveNF2G's Avatar
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Jan 2001
Location: Rensselaer, NY
Posts: 8,734
Default

The PSR600 will apply the P25 decoder when it receives a P25 signal on an FM channel.
__________________
David T. Stark
NF2G WQMY980 KYR7128
ARRL VE & Registered Licensing Instructor
Reply With Quote
  #3 (permalink)  
Old 01-31-2018, 8:29 AM
Member
  Amateur Radio Operator
Amateur Radio
 
Join Date: Mar 2005
Location: Gilcrest, CO
Posts: 1,046
Default

Yes, each conventional TGRP can be set to P25. The choices available in the scanner itself are as follows: None, CTCSS, DCS, P25, and Search.

The Win500 Software should include all the available options the scanner offers? I use a different software.

Shawn
Reply With Quote
  #4 (permalink)  
Old 01-31-2018, 9:30 AM
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Jul 2008
Location: Beautiful Southern IL
Posts: 19
Default

NF2G:
This is good info. Thanks
Reply With Quote
  #5 (permalink)  
Old 01-31-2018, 9:31 AM
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Jul 2008
Location: Beautiful Southern IL
Posts: 19
Default

Quote:
Originally Posted by ScannerSK View Post
Yes, each conventional TGRP can be set to P25. The choices available in the scanner itself are as follows: None, CTCSS, DCS, P25, and Search.
Shawn
There is no TGRP as they are conventional channels.
Reply With Quote
Sponsored links
  #6 (permalink)  
Old 01-31-2018, 2:47 PM
Member
  Amateur Radio Operator
Amateur Radio
 
Join Date: Aug 2003
Location: Peoria, AZ.
Posts: 3,263
Default

I have a PSR 500. Once you program the frequency, you then program the squelch as ScannerSK mentioned. If "None", "P25", or "Search", the radio will automatically decode a P25 signal.

John
Peoria
Reply With Quote
  #7 (permalink)  
Old 01-31-2018, 4:04 PM
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Jul 2008
Location: Beautiful Southern IL
Posts: 19
Default

Quote:
Originally Posted by KB7MIB View Post
I have a PSR 500. Once you program the frequency, you then program the squelch as ScannerSK mentioned. If "None", "P25", or "Search", the radio will automatically decode a P25 signal.

John
Peoria
I am using WIN500 software for programming. I got a bunch of conventional P25 freqs downloaded from RR thru WIN500. Win500 made the modulation mode as FM but put the squelch setting as NAC. I checked the drop down box for squelch in WIN500 and P25 is not an option. It has NONE, CTCSS,DCS,NAC,multiple.

I am not sure what NAC is but understand the other selections.
Reply With Quote
  #8 (permalink)  
Old 01-31-2018, 4:31 PM
UPMan's Avatar
Uniden Representative
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Apr 2004
Location: Arlington, TX
Posts: 11,935
Default

NAC is the P25 equivalent of CTCSS/DCS.
__________________
Uniden Product Ninja
Who is UpMan and why doesn't he answer my email/phone call?
Personal Blog
For better help, tell us specifically what you are trying to scan.
Reply With Quote
  #9 (permalink)  
Old 01-31-2018, 6:08 PM
Member
  Premium Subscriber
Premium Subscriber
 
Join Date: Feb 2009
Location: Cleveland, Ohio
Posts: 1,705
Default WIN500

Quote:
Originally Posted by Xbullworker View Post
I am using WIN500 software for programming. I got a bunch of conventional P25 freqs downloaded from RR thru WIN500. Win500 made the modulation mode as FM but put the squelch setting as NAC. I checked the drop down box for squelch in WIN500 and P25 is not an option. It has NONE, CTCSS,DCS,NAC,multiple.

I am not sure what NAC is but understand the other selections.
Just use the default settings: For Mod (modulation) the setting is Auto and for Squelch the setting is Search.

The scanner will automatically decode the P25 (CAI) audio.
__________________
Bud
Pro-34/Pro-97/PSR-500/BCD436HP/TRX-1
Reply With Quote
  #10 (permalink)  
Old 01-31-2018, 8:42 PM
Member
  Amateur Radio Operator
Amateur Radio
 
Join Date: Aug 2003
Location: Peoria, AZ.
Posts: 3,263
Default

Sorry, my mistake. Under squelch, you want to select NAC, not P25.

John
Peoria, AZ
Reply With Quote
  #11 (permalink)  
Old 02-01-2018, 5:36 PM
usswood's Avatar
Member
   
Join Date: Nov 2004
Location: Terre Haute, IN
Posts: 1,119
Default

Quote:
Originally Posted by budevans View Post
Just use the default settings: For Mod (modulation) the setting is Auto and for Squelch the setting is Search.

The scanner will automatically decode the P25 (CAI) audio.
This setup works, but If you know that it is conv P25 then set it as P25 instead of auto... If not it will take the scanner a sec or 2 to open the squelch as P25.. If its mixed audio, P25/FM then auto works best
__________________
usswood
Reply With Quote
  #12 (permalink)  
Old 02-01-2018, 6:11 PM
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Jul 2008
Location: Beautiful Southern IL
Posts: 19
Default

Quote:
Originally Posted by usswood View Post
This setup works, but If you know that it is conv P25 then set it as P25 instead of auto...
This is why I get confused. P25 is NOT an option in the WIN500 software. With conventional channels, the modulation options are: AM,FM,NFM and Auto. NO P25 selection is available.
Reply With Quote
  #13 (permalink)  
Old 02-01-2018, 6:29 PM
usswood's Avatar
Member
   
Join Date: Nov 2004
Location: Terre Haute, IN
Posts: 1,119
Default

Quote:
Originally Posted by Xbullworker View Post
This is why I get confused. P25 is NOT an option in the WIN500 software. With conventional channels, the modulation options are: AM,FM,NFM and Auto. NO P25 selection is available.
do this...sq mode is = P25
then sq NAC = search (if you don't know the exact NAC)

Modulation is either FM/NFM

hope this helps with the confusion
__________________
usswood
Reply With Quote
  #14 (permalink)  
Old 02-01-2018, 8:03 PM
Member
  Premium Subscriber
Premium Subscriber
 
Join Date: Feb 2009
Location: Cleveland, Ohio
Posts: 1,705
Default No P25 settings for Mod or Squelch

Quote:
Originally Posted by Xbullworker View Post
This is why I get confused. P25 is NOT an option in the WIN500 software. With conventional channels, the modulation options are: AM,FM,NFM and Auto. NO P25 selection is available.
At least three members have said the same thing. There is nothing to set in WIN500 for conventional channels/frequencies. P25 encoded digital signals are automatically detected by the GRE PSR600 and PSR500 scanners.

Here's a link if you want more information regarding P25: https://wiki.radioreference.com/index.php/P25_CA

Note: If you still can't receive these channels/frequencies, are you sure they are conventional and not part of Trunk system. What system or group are your trying to receive? City/Town name and location. Where did you find this info in the RR database?
__________________
Bud
Pro-34/Pro-97/PSR-500/BCD436HP/TRX-1

Last edited by budevans; 02-01-2018 at 8:12 PM..
Reply With Quote
  #15 (permalink)  
Old 02-02-2018, 6:46 AM
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Jul 2008
Location: Beautiful Southern IL
Posts: 19
Default

Quote:
Originally Posted by budevans View Post
At least three members have said the same thing. There is nothing to set in WIN500 for conventional channels/frequencies. P25 encoded digital signals are automatically detected by the GRE PSR600 and PSR500 scanners.
True, but 3 other members told me to set the modulation for P25 which can not be done. I have it figured out now, the answer in your quote is correct.
Reply With Quote
  #16 (permalink)  
Old 02-02-2018, 7:03 AM
Member
  Amateur Radio Operator
Amateur Radio
 
Join Date: Mar 2005
Location: Gilcrest, CO
Posts: 1,046
Default

Quote:
Originally Posted by Xbullworker View Post
True, but 3 other members told me to set the modulation for P25 which can not be done.
If the "Squelch Mode" is set to either "Search" or to "None" this will slow down the scanner by the amount of time specified in the "DG Int Prime" setting in the special global settings menu (typically set to 60 which equates to 600 milliseconds per active channel). If it is known for certain that a conventional object is P25 then you will want to set the "Squelch Mode" to "NAC" and the "Squelch Code" to "Search" to prevent slowing the scanner down unnecessarily by forcing the conventional object to search for all types of modulation every time there is activity on that object.

Below (circled in red) is an example of how to set a conventional object (known to be using P25 modulation) to P25 using the Win500 software. What the software calls "NAC" sets the scanner to "P25". I hope this helps.
Attached Images
 

Last edited by ScannerSK; 02-02-2018 at 7:31 AM..
Reply With Quote
  #17 (permalink)  
Old 02-02-2018, 10:48 AM
DaveNF2G's Avatar
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Jan 2001
Location: Rensselaer, NY
Posts: 8,734
Default

ScannerSK has it right (as did a couple of others).

In the GRE scanners, a Squelch Mode of NAC limits the processor to evaluating whether signals carry a Network Access Code, or whether they are P25 digital. The Squelch Code of Search tells the processor to demodulate (send to the speaker) any transmission that has a NAC and display the code on the screen.

The later model Unidens are more explicit, in that they offer first a choice of Analog or Digital "Squelch Mode" and then offer the relevant Search/Decode selections based on that choice.
__________________
David T. Stark
NF2G WQMY980 KYR7128
ARRL VE & Registered Licensing Instructor
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 4:13 PM.


Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
All information here is Copyright 2012 by RadioReference.com LLC and Lindsay C. Blanton III.Ad Management by RedTyger
Copyright 2015 by RadioReference.com LLC Privacy Policy  |  Terms and Conditions