Rick Jones wrote:

<snip>
>
>>However, you have given me an idea. It should be possible to
>>generate our own one pulse per second signal from a couple of
>>rubidium oscillators. However, I'm not sure if the Netra T1's have
>>enough serial ports, as one will be used to control the Suns. There
>>are two serial ports are marked "LOM A" and "Serial B". I assume I
>>can can control the machines from one of these and sync to `1 pps
>>signal on the other, but I'm not 100% sure of that.

FWIW, a few more approaches:

1. If you lack sufficient serial ports, use a terminal server on
ethernet (e.g. Remote Annex, very cheap to acquire on eBay
and elsewhere)

2. If GPS isn't possible at one or more sites, use a WWV/WWVB receiver.

3. A more costly option to operate would be a cellular gateway device, again
cheap on eBay, connected to ethernet.

I use a terminal server with a serial-interfaced remote-controlled HF
receiver to hear WWV for a similar purpose here; the audio drives
sound-card line-in and software decodes the timecode. The many additional
serial ports on the terminal server handle other experimental devices.

Michael