[time-nuts] HG 414A Rubidium

[Bob Camp]

Hi

Not available for purchase in the US. That's no fun, think of the bidding war we all could have gotten into ...

Bob


On Mar 25, 2011, at 5:06 AM, Heinzmann, Stefan (ALC NetworX GmbH) wrote:

> Ebay 180632718950
> 
> Is it this one?
> 
> Cheers
> Stefan
> 
> -----Ursprüngliche Nachricht-----
> Von: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] Im Auftrag von Magnus Danielson
> Gesendet: Freitag, 25. März 2011 00:31
> An: Discussion of precise time and frequency measurement
> Betreff: [time-nuts] HG 414A Rubidium
> 
> Fellow time-nuts,
> 
> Today a new box entered the lab, a Götting KG HG 414A. This is not of 
> German origin, but is in fact a Soviet/Russian TSCH1-78. I've got SN 052 
> made in 1992, but the manual seems to be written in 1986.
> 
> Manuals is some form of copy method I just can't recall right now, but 
> stencil looks possible.
> 
> Mine comes with complete electrical and mechanical drawings, calibration 
> manual with nice stamps . All that in russian. There is also some 
> manuals translated into german which helps me a lot in the basic get 
> started operation, even if my german is close to non-existent.
> 
> It is in good shape, even if a quick look at the waveforms shows that 
> some improvement can be achieved. It locks and operates relatively well 
> straight out of the box.
> 
> So, what does it do?
> 
> It has a Rubidium reference in it. A 5 MHz OCXO which synthesize into 90 
> MHz and 5,31746 MHz which then is mixed in the cavity to 6,83468254 GHz 
> with a 86,8 Hz phase-modulation for resonance sweep.
> 
> It has a lock-indicator on the front and also a trimmer for OCXO 
> adjustment with indicators of direction to turn.
> 
> With that in hand, it generates 10 MHz, 5 MHz, 1 MHz and 100 kHz sine 
> outputs.
> 
> It further takes a 5 MHz input and measures it's frequency over one 
> second with 1E-11 resolution or over 10 or 100 s with 1E-12 resolution.
> It shows 7 digit numbers. It essentially mix down to 500 Hz, 50 Hz or 5 
> Hz and measures. Works nicely.
> 
> It can also measure time-differences, and thus relates to the time it 
> has. It is fairly easy to set up the time of day in HH MM SS and it 
> looks like you can take a PPS and time-align it to it. Then you can 
> measure that time-difference. It also has a delayed output which is 
> programmable in 100 ns steps.
> 
> So, this box is a bit of everything, but a rather nice one.
> 
> The DC connector is unknown to me, but the AC is a standard IEC one, so 
> that took no time to hook up.
> 
> It will take some time to fully understand it, but who said it would be 
> easy?
> 
> I need to brush up my russian and german... ah well.
> 
> I use a TADD-2 for wave-cleanup, but it only achieves it partly.
> 
> Cheers,
> Magnus
> 
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