[time-nuts] Neat toys on eBay for PN measurement

John Miles jmiles at pop.net
Thu Jul 12 16:28:21 EDT 2007

Only took a few minutes to get the 11729C working.  The attached shot was
taken without quadrature locking, so who knows how accurate it is, but the
proportions look good.

I couldn't get the 11729C's PLL to lock, but I think that's because my
8662A's got a stability problem in FM mode.  I'll have to add an EFC input
for the 8662A next and see how it does then.

John A., did you get yours yet?  Wonder if the third one went to a member of
this list; I didn't recognize the eBay user ID.

-- john, KE5FX

> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
> Behalf Of John Miles
> Sent: Wednesday, July 04, 2007 8:14 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Neat toys on eBay for PN measurement
> ); SAEximRunCond expanded to false
> Errors-To: time-nuts-bounces+jmiles=pop.net+jmiles=pop.net at febo.com
> > Mark Kahrs wrote:
> > Hey, why not buy a 11848A (160117841068) from the same seller?
> > Only 2.6K$!
> > Put that in your PN system...
> I saw that, but (a) the 11729C already did enough damage to the exchequer,
> and (b) I'm not clear on what an 11848A does for you if you don't have the
> 3048A system software.
> I don't believe there is anything in the 11848A box that isn't also in the
> 11729C, and the 11729 has a lot of stuff (like the microwave
> downconverter)
> that is not present in the 11848.  Maybe Rick K. or someone familiar with
> the hardware can speak to that?
> I already have a few hundred bucks in a 35601A (the 11848A equivalent from
> the older 3047A noise-measurement system) that didn't turn out to be very
> practical to mess with, so I'm leery of spending any more money than
> necessary on equipment that can't be used without writing a lot
> of code and
> adding yet more hardware.  One nice thing about the 11729 is that it has
> front-panel buttons that correspond to all of its GPIB features,
> so I don't
> *have* to write any code before I can try it out.
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