[time-nuts] PTS synthesizers

EB4APL eb4apl at cembreros.jazztel.es
Thu Feb 9 00:47:33 UTC 2012


I already have the info on the remote interface, taken from the PTS 160 
doc and other sources, I was asking if he was talking about some 
specific gadget.

I also was using at those years some remotely controlled PTS's , did you 
know the JPL MK IV receiver exciter?  I think it was also a 040 but I'm 
not sure, because these changed the phase smoothly but I think that 
there is an option with a DDS to allow such thing.
Unfortunatelly those exciters are now dismantled and I think the doc was 
dumped, anyway I'll have to make a phone call.


On 09/02/2012 1:17, Jim Lux wrote:
> On 2/8/12 3:23 PM, EB4APL wrote:
>> I want to take advantage of the topic just to ask if anybody has any
>> manual or schematics of the PTS 040. I realize that the PTS 160 is close
>> enough, taking in account the different frequency range, and they use
>> almost the same modules but it would be nice to have the right manual.
>> What is about the remote interface? Please, share the info.
> Way back in the 80s, I used a PTS and the remote interface, so I'm 
> going off memory. As I recall, it's basically a BCD parallel thing 
> with a strobe. The general architecture of their synthesizers is a 
> series of decade modules, so the parallel interface just extends that 
> to as many digits as you have modules.
> Settling time to the new frequency is pretty fast (<1 microsecond, I 
> think) but not necessarily phase continuous, and, there can be 
> glitches during the transition (i.e. if one module switches faster 
> than the others).  no fancy-shmancy DDSes back in those days.
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