[time-nuts] Why a 10MHz sinewave output?

[Magnus Danielson]

On 02/07/2012 08:12 PM, Hal Murray wrote:
>
> lists at rtty.us said:
>> Thank goodness for that inertia. I can still cable up a 100Kcps sine wave
>> standard to run stuff from "long ago". When I run into a box that uses a T1
>> signal for a clock reference - not so easy in the basement.
>
> How much gear is there that uses T1 for a clock input?
>
> Is there any interest in a board/chip/whatever that converts 10 MHz to T1?  A
> clean design using a decimal DDS should fit into a small FPGA, maybe a CPLD.

1,544 MHz is a bit funny, 193*8 kHz. On the other hand, a 1250 sample 
long sample-memory and then toss that through a DAC and the sine can 
then be smoothed.

A 2,048 MHz (256*8 kHz) could do just the same.

If you need a squarewave, then a sine to square converter will produce a 
fairly accurate transition time signal.

Cheers,
Magnus