[time-nuts] Re: Will a TADD-2 work with 50 MHz input?

[Magnus Danielson]

Hi Jim,

Well, you might be able to push the input-stage to support 50 MHz, but 
not the PIC. However, if you manage to divide by 4 through a break-in, 
you may be in luck.

BTW. Some old reports show that odd division numbers performs worse than 
even division. I can't recall seeing a conclusive analysis on that, but 
I think it lies in how noise folds around, which have been analyzed 
better in the last years.

However, doesn't the TICC support 50 MHz? If so, you could use your 
TADD-2 on the 10 MHz and get your start time-base there to trigger the 
TICC and then use the 50 MHz as stop. If 50 MHz too high, divide down 
until in range, but not much more.

Cheers,
Magnus

On 2024-09-26 02:51, Jim Lux via time-nuts wrote:
> 	
>
>
> I have a 50 MHz oscillator I want to measure, and I have a TICC and a 10 MHz source (to run the TICC) and a good 1pps.  I assume that if I divide the 50 down to 5 (e.g. with the TADD-2) I can do the measurement.  The question is whether the TADD (or some other inexpensive off the shelf thing) can handle that high an input frequency.
> Or, is that pushing the PIC beyond its limits?
>
> Same sort of question for 100 MHz.
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at lists.febo.com
> To unsubscribe send an email to time-nuts-leave at lists.febo.com