[time-nuts] Re: Datum/ET5390-6000 White Wire change for DT102E FW and bodge-wire

[Time-Nuts]

Ok Steve -

Upon re-reading your message, it seems that I misunderstood. It's only that mod you are looking for. My units still seemed to operate correctly after the firmware change. Maybe mine are of such a rev that the mod isn't required. Still interested to hear about if you uncover it.

WRT your experience, I feel your pain. Only from the other side :) (3AM in a Verizon Wireless MTSO with a Sun SPARC laptop... ah, the good old days :)

Cheers!

Paul

June 16, 2023 11:46 AM, "Steve Uckerman via time-nuts" <time-nuts at lists.febo.com> wrote:

> Hi Paul!
> 
> My apologies.. I fat-fingered the title.. Ugh!
> You are correct, I meant the Datum 9390-6000.
> 
> I have the "E" images for DT102/103 (they were sent to me directly from
> Symmetricom back in '09), although this is the OCXO version so only 102 is
> needed.
> I distinctly remember there was a white-wire mod needed which if memory
> serves correctly, had to do with the boot-up of the unit.
> 
> Fun fact.. Back on March 21, 2009, this little ditty of a GPS bug took all
> of our Payload Uplink antennas into the ground at Sirius Radio. I was out
> to dinner with my (now Ex) wife and a group of friends and sat on a curb
> outside of a restaurant for almost 2 hours trying to figure out what had
> happened and how to restore tracking.. We were on the phone with
> Symmetricom immediately and they were just as surprised as we were.
> What a flustercluck. Our firmware fix came overnight delivery right from
> the lab! LOL.
> 
> I did get my 9390 to lock-up (I want to use this for a freq reference on my
> home lab/bench), although it's finicky at startup.
> I'll do a bit more digging and see if I can find the original
> instructions...
> 
> Steve
>