Ebay 180632718950 Is it this one?
Cheers Stefan -----Ursprüngliche Nachricht----- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@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 _______________________________________________ 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. _______________________________________________ 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.