FE-5650A CPOM anyone with experience with this?

[Cyclotron]

This FE-5650A CPOM does not show up in any documentation I've found. it is out of telecom gear and set to 15Mhz.
https://www.prc68.com/I/FEIFS.shtml

I have attempted many ways to establish a serial or TTL connection with the DS80C323 chip, but nothing ever comes out of Ping 7. 

Does anyone know if there's a trick to talk to this unit or a means to adjust the frequency to 10 MHz?

[testpoint1]

This FE-5650A CPOM does not show up in any documentation I've found. it is out of telecom gear and set to 15Mhz.
https://www.prc68.com/I/FEIFS.shtml

I have attempted many ways to establish a serial or TTL connection with the DS80C323 chip, but nothing ever comes out of Ping 7. 

Does anyone know if there's a trick to talk to this unit or a means to adjust the frequency to 10 MHz?

I have many of this unit, to change the frequency, it is NOT by any serial (TTL or 232, depends the chip) command, it needs to set the jump resistor inside. any way, it is easy, but I never been post here since many seller want to sell it.

[Cyclotron]

I have many of this unit, to change the frequency, it is NOT by any serial (TTL or 232, depends the chip) command, it needs to set the jump resistor inside. any way, it is easy, but I never been post here since many seller want to sell it.

Thank you. I have configured mine to 10 Mhz now. I'm exploring adding the 5 volt regulator so I only need to supply the unit a single 15v power.

[Santi-hr]

Hello,

Is it possible for you to share more details on the conversion to 10MHz?

I recently purchased a unit of the oscillator that the seller swear will be 10MHz but turned out to be exactly as all CPOM, configured to 15MHz by default.

Thank you very much!

[Cyclotron]

What I can tell you from memory is that I had to move at least one resistor on a board. I am searching for my notes but I'm not confident I'll find them.  I will need to find the unit that I modified and maybe I can look at it and recall the procedure.  Sorry, I can't find the notes right now.

[ZloiAndrey]

Hi, Santi-hr!
Here is a picture with the differences.

[Cyclotron]

Hi, Santi-hr!
Here is a picture with the differences.

Thanks! I am heading home today and was going to try to dig mine out to get some pics.  Saved me some work.

I know there's also a way to "talk" or program these units in some cases. Some have the max chips for TTL comms etc. I've been meaning to run some analysis of them but haven't gotten back to that set of projects.

[Santi-hr]

Thank you both! ZloiAndrey for providing the photo so fast and Cyclotron for be willing to reopen the unit after so long!

I also had to solder the RJ414 jumper to get a clean 10MHz sine.

The output now is around 8Vpp. Is this expected? I guess as the resistor divider is removed.
So far, for a short 1 hour test, it is working perfectly. Thanks again!