[time-nuts] 5370A

Joseph Gray jgray at zianet.com
Sat Oct 10 09:38:08 UTC 2009

I keep thinking of things instead of going to bed.

In the 5370A manual, the ops verification of the HPIB port requires an
old HP computer and a program on tape. Needless to say, I don't think
I'm going to come across either of these items. So, has anyone managed
to duplicate that test with modern tools? Or, should I not worry about
testing the port if it works at all?

Now I really need to hit the sack. Goodnight (or morning) to all.

Joe Gray

On Sat, Oct 10, 2009 at 3:14 AM, Joseph Gray <jgray at zianet.com> wrote:
> John,
> Trigger levels are set to "Preset" for most steps. In step 18, I
> verified that Preset is 0V and the Level voltage varied from
> aproximately -1.3 to +0.6 volts. The manual specifies "approximately
> -1.3 to +0.5 volts."
> In step 15, the standard deviation was bouncing around between about
> 36-57pS. The manual says that less than 100pS is good.
> Time for bed.
> Joe Gray
> On Sat, Oct 10, 2009 at 2:32 AM, John Miles <jmiles at pop.net> wrote:
>>> Bruce,
>>> Thanks for the tip. I was very careful. Only one board was really
>>> stuck. I left it alone for now.
>>> Just for the heck of it, I did a few more steps in the Chapter 4
>>> Operation Verification. As I said, discounting the bad BNC, step 13
>>> reads aproximately 103.6nS, so I continued.
>>> Steps 14, 15 and 16 are ok.
>>> Step 17 shows 3.6nS (should be < 1nS). Period Compliment shows
>>> -96.3nS. Something very wrong here.
>> What are your trigger levels?  A small departure from 0.00 volts could
>> account for this.
>> Also, what's the standard deviation when measuring its own OCXO?
>> -- john, KE5FX
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