David
Many thanks for your help, I have downloaded all three items, my 58503 is an
A, I had no idea that a B model existed ! Mine has the front panel
display, which is very bright suggesting that it had not been used for very
long periods. The unit was in overall VG condition when I received it (costa
plenty!) , and I have reason to believe it was used as a portable survey
tool. Internally there is a panel to the rear that has a number of SMC
connectors, and just one is used to provide the 1 pps jumper lead to a BNC
at the rear (external) panel. It would be interesting to know what the other
SMC connectors where for ??
Am I to assume that no Service/Technical manual is available ? Mine has the
HP SmartClock Technology sticker on the front panel - what exactly does this
mean ?
Regards
Roy
-----Original Message-----
From: Dr. David Kirkby (Kirkby Microwave Ltd)
Sent: Monday, January 09, 2017 11:42 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] What signals if any are on the unpopulated SMC pads
onthe 58503A motherboard?
On 9 January 2017 at 10:44, Roy Phillips <phill...@btinternet.com> wrote:
I would be grateful for an answer to this question, as I also have a an HP
58503 - is the manual for the instrument available for download ?
Thank you
Roy
I know its a bit unlikely to use SMC in such a case, but I believe there
are some versions of the 58503A which have a clock, and perhaps some
buttons on the front. I would have expected them to be via a multi-way
cable, but maybe not.
There are at least two relevant manuals on Tom's website
http://www.leapsecond.com/museum/hp59551a/097-59551-02-iss-1.pdf
http://www.leapsecond.com/museum/hp58503a/097-58503-08-iss-1.pdf
I also have another one - not sure where I got that from. It might have
been on Tom's site too, but if not, I put a copy here.
http://www.kirkbymicrowave.co.uk/58503B-GPS-disiplined-OCXO-frequency-standard-097-58503-13-iss-1.pdf
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