[time-nuts] Rubidium freq standard - temperature
kb8tq at n1k.org
Fri Dec 1 09:17:28 EST 2017
Back a while ago EG&G decided they needed a new name. The connection of the
company name to various pieces of history was believed to be an issue. Back then
they were actively buying up various companies. When they bought Perkin Elmer,
they decided to use that name for the new company. I used to drive past the (now
empty) Perkin Elmer HQ building on my way to work.
Tracking much of anything down at the company (regardless of the name) is a bit
crazy. You need to go to the division involved with the work and see if they have
the info you are after.
These Rb’s were designed as FRK / M-100 clones back in the 1980’s. Back then,
the idea of serial control was not as pervasive as it is today. They may well have
been redesigned in the 1990’s or even later. If so, the marketing guys didn’t have
much of an advertising budget ….
> On Dec 1, 2017, at 12:54 AM, Jerry Hancock <jerry at hanler.com> wrote:
> Mark, I agree. I tried scoping some pins. I see a few different levels and one pin has what looks like a clock signal with a period of about 4.2ms. Other than that, hard to tell without a manual.
> I know people went so far as to contact Perkin Elmer without luck, I had heard they had acquired EG&G.
> I wouldn’t mind sending one to someone that could do a better test on it. I’ll play around with them if and when I get the TPLL setup working.
>> On Nov 30, 2017, at 9:39 PM, Mark Sims <holrum at hotmail.com> wrote:
>> I doubt that it would be a direct mapping to a 9-pin serial connector. And probably would not be outputting anything unless prompted. It might be useful to scope the pins and see if anything looks like serial data. Even if it has a serial port, without some kind of manual, it is probably useless.
>> If it not RS-232 compatible voltage tolerant and you connect a +/- V RS-232 signal into it you could burn something out.
>>> I opened it up, JT1 has 9 pins. What are the odds? I think I have to hook something up to it and see if there is anything on 2 or 3, no?
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