RadioReference on Facebook   RadioReference on Twitter   RadioReference Blog
 

Go Back   The RadioReference.com Forums > Scanners, Receivers and Related Equipment Forums > Uniden Forums > Uniden Thread Archives


Uniden Thread Archives - A depository of archived threads from the original Uniden forum.

 
 
LinkBack Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 01-23-2010, 11:33 PM
davef3138's Avatar
Member
  Audio Feed Provider
Audio Feed Provider
 
Join Date: Feb 2005
Location: Central Minnesota
Posts: 207
Default LTR scan speed on 396XT

I've noticed on my 396XT that when scanning Motorola systems, if there's no control channel signal present the radio will fly past the site/systems quite quickly. With LTR systems however, it will "dwell" on each system for about a second whether there's a signal present or not. (yes, the system hold time is set to 0)

Just curious why the behavior is different? It would seem logical that the scanner could skip over the LCNs with no signal present, slowing down to decode when it heard something.
Sponsored links
  #2 (permalink)  
Old 01-24-2010, 7:38 AM
Wiki Admin Emeritus
  Amateur Radio Operator
Amateur Radio
 
Join Date: Jul 2002
Location: Bowie, Md.
Posts: 21,174
Default

My first thought would be did you change the delay time on the system to zeros as well? 73 Mike
__________________
co-author, HF Digital Decoding
HF Forum moderator, RadioReference
Friends don't let friends buy Scancat Lite Plus!
  #3 (permalink)  
Old 01-24-2010, 9:41 AM
DaveIN's Avatar
Founders Curmudgen
  RadioReference Database Admininstrator
Database Admin
Amateur Radio Operator
Amateur Radio
 
Join Date: Jan 2003
Location: West Michigan
Posts: 6,636
Default

It would need time to check the LTR home channels for data, so it checks each LCN for a data burst one time, then moves on to the next programmed system. As Mike pointed out the delay could be extended by the system delay setting.
  #4 (permalink)  
Old 01-26-2010, 9:15 PM
davef3138's Avatar
Member
  Audio Feed Provider
Audio Feed Provider
 
Join Date: Feb 2005
Location: Central Minnesota
Posts: 207
Default

System delay is set to 0 seconds, site hold time is also 0 seconds.

>It would need time to check the LTR home channels for data, so it checks each LCN for a data burst one >time, then moves on to the next programmed system. As Mike pointed out the delay could be extended by >the system delay setting.

I don't think it's waiting for a data burst...the data bursts occur every 10 seconds, but the "dwell" time is a consistent second or so. If I create a "bogus" LTR system with 8 LCNs, it dwells on it for the same amount of time as a fake (or real) LTR system with only 2 LCNs set up.

Maybe it checks the LCNs for a carrier multiple times within that ~ 1 second time, instead of checking them just once and moving on to the next system (which would take a fraction of a second)?
  #5 (permalink)  
Old 01-26-2010, 9:17 PM
davef3138's Avatar
Member
  Audio Feed Provider
Audio Feed Provider
 
Join Date: Feb 2005
Location: Central Minnesota
Posts: 207
Default

For what it's worth, my old 246T also behaves the same way.
Sponsored links
  #6 (permalink)  
Old 01-27-2010, 8:44 AM
kc0net's Avatar
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Jun 2004
Location: Bloomington, Minnesota
Posts: 108
Default Ltr

I found that my radio was doing the same thing, then i realized that the squelch was open.
Try adjusting the squelch, but often on digital signals you need keep it open.
Frank
  #7 (permalink)  
Old 01-28-2010, 10:40 AM
davef3138's Avatar
Member
  Audio Feed Provider
Audio Feed Provider
 
Join Date: Feb 2005
Location: Central Minnesota
Posts: 207
Default

I've got the squelch on the 396XT set to "2", which keeps it closed on VHF & UHF conventional, non-PL/DPL channels.

I'll try cranking the squelch to the max (15) to see if that changes the behavior at all.
  #8 (permalink)  
Old 01-28-2010, 9:53 PM
davef3138's Avatar
Member
  Audio Feed Provider
Audio Feed Provider
 
Join Date: Feb 2005
Location: Central Minnesota
Posts: 207
Default

Tight squelch setting makes no difference. I'm assuming it's the way the radios are engineered to decode LTR systems...
 

Tags
396xt, ltr, scan, speed, uniden

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 9:55 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