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
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@yahoo.com To: app_rpt-users@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@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
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@yahoo.com To: app_rpt-users@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@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
_______________________________________________ App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
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@arrl.net To: app_rpt-users@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@yahoo.com To: app_rpt-users@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@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users _______________________________________________ App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users _______________________________________________ App_rpt-users mailing list App_rpt-users@ohnosec.org http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
I completely understand! Thanks for the info. Chris On 05/24/2012 12:22 PM, Jim Duuuude wrote:
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@arrl.net To: app_rpt-users@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@yahoo.com <mailto:baldwin88@yahoo.com> To: app_rpt-users@ohnosec.org <mailto:app_rpt-users@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@ohnosec.org <mailto:App_rpt-users@ohnosec.org> http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users
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participants (3)
-
Chris Perrine (KB2FAF) -
Fran -
Jim Duuuude