[time-nuts] FE-5680A performance

EB4APL eb4apl at cembreros.jazztel.es
Thu Jan 5 17:54:31 UTC 2012



On 05/01/2012 16:49, David wrote:
> On Thu, 05 Jan 2012 01:44:13 -0800, Hal Murray
> <hmurray at megapathdsl.net>  wrote:
>
>> albertson.chris at gmail.com said:
>>> Have an older Tek 465 scope that is in only "fair" shape and I see nothing
>>> on that pin but milivolt level sine wave of about 60MHz.  I can't set the
>>> scope to show any hint of a PPS ...
>> I do have a 465.  You should be able to see a 1 uSec PPS.
> 60MHz is about a 6nS rise time and is easily fast enough to see it.
>
>> Now turn up the Intensity until you can see the pulse.  It might help to turn
>> down the room lights.
> This is the problem.  With a 1 second repetition rate, the brightness
> is going to be very low.
>
> The old ways of viewing such a low repetition rate signal include
> using a hood or dark room, special CRT phosphors, photographic film,
> MCP (micro channel plate) intensified CRTs, and of course analog
> storage and later digital storage.
>
I agree, I've seen it in a Tek 7623A with the storage on, it is quite 
difficult without it.

Regards,
Ignacio, EB4APL

PD. Just trying to verify this I made some error and let the magic smoke 
leave the unit. It is still smelling ...





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