[App_rpt-users] What is a PGCM

Jim Duuuude telesistant at hotmail.com
Thu May 24 12:22:55 EDT 2012



For sure its not on the website. There just has been WAAAYYY too many things to do and take care of for
preparation for the Dayton trip, and there now is WAAAAYYY too many things to take care of that were waiting
for us to get back from Dayton. 

If you want one, send email to Mark (micro-node). He will be happy to sell you one.

Jim

Date: Thu, 24 May 2012 12:16:26 -0400
From: kb2faf at arrl.net
To: app_rpt-users at ohnosec.org
Subject: Re: [App_rpt-users] What is a PGCM


  
    
  
  
    Very cool.  Just what I am looking for...although it doesn't look
    like the PCGM has made it on the web site for sale yet...at least I
    couldn't fine it.

    

    Chris

    

    KB2FAF

    

    

    

    

    

    

    On 05/24/2012 10:59 AM, Jim Duuuude wrote:
    
      
      
        The PCGM (Programmable Clock Generator Module) is a device used
        for some configurations

        of simulcast with the RTCM. For transmitters that can "swallow"
        a 10 MHz external reference clock source

        (such as the Motorola Quantar, etc), all you need is the output
        of the RTCM driving the direct 

        modulation of the transmitter. For radios that do not have an
        external reference clock source

        (or have one, but not at 10MHz), the PCGM will take the 10Mhz
        reference from the GPSDO (generally

        a Trimble Thunderbolt) and "make" whatever frequency your
        transmitter needs for a reference

        (at least one of 17988 frequencies possible). Transmitters that
        do not have an external reference

        clock input at all generally need to be modified to disconnect
        the normal internal reference oscillator

        and make provisions to allow injection of the reference clock
        frequency from the PCGM. 

        

        In addition the PCGM also generates the voltages (3 of them, I
        believe) to run the Trimble

        Thunderbolt, with a single (generally 12 volt) input to the
        PCGM.

        

        These devices are available for sale from the Micro-Node.Com
        site.

        

        There was also a question on the list about the ClockSynth
        project. This was merely an initial prototype

        to prove the base design of the PCGM. There were only 2 boards
        of this type built. They worked and

        demonstrated the validity of the general concept from which the
        PCGM was then based.

        

        Jim WB6NIL

        

        

        
          Date: Sun, 20 May 2012 20:16:34 -0700

          From: baldwin88 at yahoo.com

          To: app_rpt-users at ohnosec.org

          Subject: [App_rpt-users] What is a PGCM

          

          
            
              
                
                  Had a friend who went to Dayton and he saw the
                    Micro Node people with a unit called a PGCM....what
                    is it and what can it do???
                   
                  Frank
                
              
            
          
          

          _______________________________________________
          App_rpt-users mailing list
          App_rpt-users at ohnosec.org
          http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
      
      

      
      

      _______________________________________________
App_rpt-users mailing list
App_rpt-users at ohnosec.org
http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users

    
    

  


_______________________________________________
App_rpt-users mailing list
App_rpt-users at ohnosec.org
http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.allstarlink.org/pipermail/app_rpt-users/attachments/20120524/dfd6b0da/attachment.html>


More information about the App_rpt-users mailing list