[time-nuts] Questionable question about the Lucent RFTGs
Bob Camp
kb8tq at n1k.org
Fri Dec 5 07:08:19 EST 2014
Hi
> On Dec 5, 2014, at 3:11 AM, Hal Murray <hmurray at megapathdsl.net> wrote:
>
>
> bill at iaxs.net said:
>> Aren't these units vintage 2000?
Rumor has it that HP started the project for Lucent *before* the Z3801 came out. Lucent didn’t buy them for a long time. HP decided to chase other customers.
>
> The ROM/PAL stickers on mine say 9905 and 9914.
>
>
> bill at iaxs.net said:
>> The Motorola 68000 CPU was available in 1982
…. and the versions on these boards were quite popular through the 1990’s
>
> When did HP ship their first GPSDO?
>
> Ahh. I have a Z3801A that says:
>
> "COPYRIGHT 1991-1995 MOTOROLA INC.”
So development likely started in the late 1980’s.
> "SFTW P/N # 98-P39972M "
> "SOFTWARE VER # 8 "
> "SOFTWARE REV # 4 "
> "SOFTWARE DATE 13 JUL 1995"
>
> A 68000 seems like a good choice to me. It's probably overkill, but that's a
> whole lot better than running out of CPU and/or the bugs associated with
> trying to squeeze software that doesn't quite fit.
>
> If I had working code, I probably wouldn't rock to boat to save a few
> pennies. How many of them did they ship?
Also consider the need to debug this stuff with the same board as you ship. There is a *lot* of logging and status even in the “customer side” protocols. I’d bet there is even more in in some HP only commands.
Bob
>
>
>
> --
> These are my opinions. I hate spam.
>
>
>
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