Re: [time-nuts] HP E1938A question
Thanks Rick, I understand better now.
The turn over label is still on the crystal but not the matching label on
the PCB.
So far I've not been able to get the software to run but will try with
some older versions of Windows and see how it goes with those.
Nigel GM8PZR
In a message dated 24/04/2017 17:28:56 GMT Summer Time,
richard@karlquist.com writes:
The main issue is that the oven will no longer be at the
crystal turnover temperature. If you are using it in
a benign environment, you might not need the extreme
thermal performance enabled by being dead nuts on the
turnover. You still have an oven with thermal gain
in the 100's of thousands.
The test software had the ability to sweep the oven temperature
and allow you to find the turn over. There was some way to
then set the oven to this temperature. I don't know if anyone
currently knows how to make the software do this anymore.
I knew at one time, but have long forgotten.
Rick N6RK
On 4/24/2017 5:41 AM, GandalfG8--- via time-nuts wrote:
I've just received an Ebay purchased E1938A, haven't tested it yet
although
I do have a 14 day return option, but unlike previous purchases of these
the serial number label is missing from the rear of the PCB so I have no
obvious way of knowing if the crystal is matched to the PCB.
Does anybody know if there's any embedded information that can be
accessed
that indicates the serial number of the board, or is there any other way
I
can check if the crystal and PCB are matched?
If not, what issues could I expect from an unmatched crystal and PCB?
Nigel GM8PZR
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
and follow the instructions there.
I know that it will run on Windows 2000. It was originally
written on Windows NT4.
Rick
On 4/24/2017 11:06 PM, GandalfG8@aol.com wrote:
Thanks Rick, I understand better now.
The turn over label is still on the crystal but not the matching label
on the PCB.
So far I've not been able to get the software to run but will try
with some older versions of Windows and see how it goes with those.
Nigel GM8PZR
In a message dated 24/04/2017 17:28:56 GMT Summer Time,
richard@karlquist.com writes:
The main issue is that the oven will no longer be at the
crystal turnover temperature. If you are using it in
a benign environment, you might not need the extreme
thermal performance enabled by being dead nuts on the
turnover. You still have an oven with thermal gain
in the 100's of thousands.
The test software had the ability to sweep the oven temperature
and allow you to find the turn over. There was some way to
then set the oven to this temperature. I don't know if anyone
currently knows how to make the software do this anymore.
I knew at one time, but have long forgotten.
Rick N6RK
On 4/24/2017 5:41 AM, GandalfG8--- via time-nuts wrote:
I've just received an Ebay purchased E1938A, haven't tested it yet
although
I do have a 14 day return option, but unlike previous purchases
of these
the serial number label is missing from the rear of the PCB so I
have no
obvious way of knowing if the crystal is matched to the PCB.
Does anybody know if there's any embedded information that can be
accessed
that indicates the serial number of the board, or is there any
other way I
can check if the crystal and PCB are matched?
If not, what issues could I expect from an unmatched crystal and PCB?
Nigel GM8PZR
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.