[R-1051] R-1051G manual on line

[paul swed]

Dave
Indeed a good question. But then why does the frequency reference module
call the circuit out as a PLL?
Some of the better HP counters do indeed work as follows the internal
reference free runs when no external reference is provided. When a
reference is provided it locks to that reference.
All I am saying is the schematic on the G says something thats not making
sense.

With respects to stacks of r1051s we had I think 4 racks with at least 20
units. It was an ammunition ship no less but had quite a good technology
compliment. Commissioned in 1973 turned to razor blades in 2015.

Regards
Paul
WB8TSL

On Tue, Jul 11, 2017 at 12:59 PM, David Wise <David_Wise at phoenix.com> wrote:

> The synthesizer boards (A12, A13, and A17) contain loops that phase-lock
> to the frequency standard module.
> They do not feed back to it, why would they?  It's the reference for them,
> not the other way around.
>
> Regards,
> Dave Wise
> ________________________________________
> From: r-1051-bounces at mailman.qth.net <r-1051-bounces at mailman.qth.net> on
> behalf of paul swed <paulswedb at gmail.com>
> Sent: Tuesday, July 11, 2017 6:11 AM
> To: R-1051 Discussion Group
> Subject: Re: [R-1051] R-1051G manual on line
>
> [snip]
>
> I did note the G version main oscillator uses a phase lock loop. Unclear
> how that actually works as there was not a feed back to the oscillator. So
> I suspect its actually just an auto sense internal/external circuit for the
> 5 MHz.
> Regards
> Paul.
> WB8TSL
>
>
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