[time-nuts] HP 5071A second life

[Matus Michael]

Thank you very much. I was too stupid to try the obvious way!

Michael

 

> -----Original Message-----
> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf 
> Of Tom Van Baak
> Sent: Thursday, June 30, 2016 4:06 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] HP 5071A second life
> 
> From the front panel: Top -> Clock -> Set -> Display:ON
> The same menu page also allows you to set the HH:MM:SS time.
> This can be done within a few seconds of power up, regardless 
> if the CBT is warming up, dead, or alive.
> The amber attention LED will remain lit, but a dead CBT 
> should not affect the red LED time display.
> 
> /tvb
> 
> ----- Original Message ----- 
> From: "Matus Michael" <Michael.Matus at bev.gv.at>
> To: <time-nuts at febo.com>
> Sent: Thursday, June 30, 2016 5:51 AM
> Subject: [time-nuts] HP 5071A second life
> 
> 
> >I have an old HP 5071 Cs-standard here on my desk. The oven 
> of the (second) tube has lost its Cs completely so the 
> instrument is no longer working. Since the electronic is 
> quite old we acquired a complete new 5071A (now from Symmetricom).
> > 
> > I tried to "reactivate" the HP as a fancy desktop clock 
> without success. Tried different commands on the serial bus 
> but was not able to switch off the fatal error states (which 
> is ok for the proper use). It is not possible to set Time and 
> Date, nor perform a synchronisation. The display just stays 
> dark. Also the reference oscillator is driven to one end 
> causing a horrible frequency stability.
> > 
> > Does somebody know a procedure to override the error states 
> so that the display works with a depleted CBT by programming? 
> I do not want to modify the hardware. And to state it 
> explicitly: I do not need a actual time/frequency standard 
> just a mockup for my desk.
> > 
> > Michael
> > 
> > Dr. Michael Matus
> > -------------------------------------------------------------
> > BEV - Bundesamt fuer Eich- und Vermessungswesen
> > Leiter des Referates Dimensionelle Groessen, Frequenz, Zeit
> > (Head of Section, Dimensional Quantities, Frequency, Time)
> > Tel. +43 1 21110-6540, Fax +43 1 21110-996000
> > 1160 Wien, Arltgasse 35, Austria
> > michael.matus at bev.gv.at
> > www.bev.gv.at
> > -------------------------------------------------------------
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