[time-nuts] Symmetricom TimeSource 3000

[Bob kb8tq]

Hi

The 3000’s primary function is to provide accurate T1 clocking for telecom 
use. Depending on the options, it provides a couple or quite a few T1 clock
outputs. It also will provide an IRIG-B and an RS-422 serial time code output. 

All of it’s functions are dependent on it being properly configured. There is software
out there somewhere to let you do this. There also is a manual. Getting it running
involves connecting the right sort of GPS antenna and putting it in self survey
mode. Quick way to see what sort of GPS antenna is to poke the SMA with a 
DVM. The DC voltage on the center conductor will be what the antenna will be 
fed. Best guess is that it’s a 5V antenna. 

Since you are converting GPS related strings into NTP, it’s probably easier / better
to just use a cheap GPS module to drive your NTP server. There’s a lot of stuff
in the 3000 that you will not be using. When it breaks, you have a mess ….

Bob



> On Feb 20, 2021, at 2:41 AM, Jason Rutledge <trashyjason at gmail.com> wrote:
> 
> Hello fellow nuts,
> 
> I have recently added a Symmetricom TimeSource 3000 to my collection of
> gear.
> 
> I was able to locate a manual online and have done some research on what's
> possible with this device. I was hoping to use it as a NTP server for my
> home network.
> 
> I have tried wiresharking the Ethernet port. This yeilds no results. It's
> not chatty in the least bit, which leads me to believe it was not used a
> NTP server.
> 
> I also have tried connecting to the craft port on the front and serial b
> port on the back with a Cisco console cable. 9600 baud N81 gets me nothing.
> Maybe they used a unique serial cable?
> 
> I was lucky enough to get the GPS antenna with the unit. When I power it
> up, I do get a green GPS light, so I believe it's working on some level.
> 
> I need to dig my oscilloscope out of storage and hook it up to the 10MHz
> output.
> 
> Is there some type of software I need to configure this thing?
> 
> If anyone has any info on this unit, please let me know. It was litterally
> sitting by the dumpster. Trying to keep working electronics out of the
> landfill.
> 
> 73's
> 
> KF4TOV
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