RadioReference on Facebook   RadioReference on Twitter   RadioReference Blog
 

Go Back   The RadioReference.com Forums > Commercial, Professional Radio and Personal Radio > Vertex Standard


Vertex Standard - Discussions regarding Vertex Standard professional and public safety radio equipment.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 05-05-2018, 2:39 AM
Newbie
  Amateur Radio Operator
Amateur Radio
 
Join Date: Apr 2018
Location: Wisconsin
Posts: 3
Exclamation Vertex VXR-7000 UHF OPENS NEARBY RADIOS

As soon as this repeater is powered on all nearby radios that are programmed on the same freq pair there RX lights come on Indiacating receive. The repeater appears to be transmitting some sort of signal without the transmitter being keyed. I checked RF power output from the antenna connector an# there no power output. Everything works great, RX good, TX output good, just this crazy issue????
Reply With Quote
Sponsored links
  #2 (permalink)  
Old 05-05-2018, 8:07 AM
Member
  Amateur Radio Operator
Amateur Radio
 
Join Date: Dec 2011
Location: Shawnee Kansas (Kansas City)
Posts: 1,178
Default

I believe this has been discussed here before. Essentially the TX local oscillator runs all the time instead of only when the transmitter is keyed. Don't remember if there was a solution. Maybe someone else here can provide additional information.
BB
Reply With Quote
  #3 (permalink)  
Old 05-05-2018, 12:06 PM
Newbie
  Amateur Radio Operator
Amateur Radio
 
Join Date: Apr 2018
Location: Wisconsin
Posts: 3
Default

Any help or guidance would be appreciated. I changed out the capacitors in the PA thinking it was a filtering issue. The reply must be correct about running all the time because as soon as I unplugged the transmitter board the condition stopped. I thinking maybe the crystal needs to be replaced???? HELP NEEDED
Reply With Quote
  #4 (permalink)  
Old 05-05-2018, 3:36 PM
cmdrwill's Avatar
Member
   
Join Date: Mar 2005
Location: So Cali
Posts: 2,884
Default

Quote:
Originally Posted by WA0CBW View Post
Essentially the TX local oscillator runs all the time instead of only when the transmitter is keyed. BB
Exactly. Nothing wrong with your repeater. The repeater runs the TX VCO, "transmitter local oscillator", all the time so the transmitter has a fast 'turn on time' . You already have the Tone squelch on your radios you wont hear the TX VCO. And you probably will get the busy indicator, this IS normal for that and many other repeaters.

The TX VCO is a phase lock loop so it does have some 'turn on time' so to eliminate the turn on and lock up time it stays on all the time. The "signal" is not very strong and does not even get to the repeater antenna. So when you and you handheld radio get away from the repeater your radio will not 'hear' the TX VCO.
Reply With Quote
  #5 (permalink)  
Old 05-05-2018, 4:36 PM
Newbie
  Amateur Radio Operator
Amateur Radio
 
Join Date: Apr 2018
Location: Wisconsin
Posts: 3
Default Only This Repeater Does This

I have 5 of these Vertex VXR-7000 UHF Repeaters and I have sold 4 or 5 others and they did not do this. It's a problem because the HT' s are many times within blocks to the repeater and there receive lights are on and then they can't Scan. One person purchased it and soon returned it. I don't blame them because it is an nagging condition.
Reply With Quote
Sponsored links
Reply

Tags
stray rf, transmitting issue, vertex birdie

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 3:28 AM.


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