[time-nuts] 15Mhz in 10MHz out?

[Mike Millen]

Can you not use the presence of the 15MHz signal to gate the 10MHz?

Mike

On 18/09/2019 17:18, David C. Partridge wrote:
> I already pick off the 10MHz prior to the Altera chip, and that works very
> well.   But that is always present, whereas IIRC the 15MHz is only present
> when the unit is locked.
>
> Hence wanting to convert 15MHz to 10MHz.
>
> D.
>
> -----Original Message-----
> From: time-nuts [mailto:time-nuts-bounces at lists.febo.com] On Behalf Of paul
> swed
> Sent: 18 September 2019 13:11
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] 15Mhz in 10MHz out?
>
> David
> Its been quite a while but either 5 or was it 10 MHz comes from the OCXO.
> There were pictures of the tap off points. So it could be a bit easier for
> you grab that 5 or 10 MHz and run it through the chip to multiply. If 10
> MHz then just filtering as I recall.
> Regards
> Paul.
>
> On Wed, Sep 18, 2019 at 5:12 AM David C. Partridge <
> david.partridge at perdrix.co.uk> wrote:
>
>> Having seen the recent discussion of the NB3N502 and other PLLs for
>> frequency multiplication.  I'm wondering if anyone knows of a similar
>> *small* IC that will convert 15MHz to 10MHz ?
>>
>> Why? My current modifications to the KS24361 output 10Mhz signals
>> regardless
>> of whether the unit has lock.   ISTR that the original 15MHz output was
>> only
>> enabled when the unit had lock.   I'd like to redo the PCB which I put in
>> place of the 15MHz band-pass filter and replace it with one that takes
>> 15Mhz
>> an outputs 10Mhz.
>>
>> Thanks
>> David
>>
>>