Re: congratulations / clock?

[Fred Gray <fegray@socrates.berkeley.edu>]

On Mon, Jun 16, 2003 at 10:24:36AM -0400, Kevin Lynch wrote:
> 
> >Second: Peter asked me to touch base with you and Rob to confirm again 
> >that you intend to provide a clock for muCap.  Do you need any more 
> >details from me?
> >
> 
> Yes we do.  And yes we do.  We will provide a clock, we just need to 
> know what frequency is needed ... Peter was supposed to get back to us 
> on that a while ago, but he didn't, and we forgot.  Let us know what is 
> needed ...
> 

Hi, Kevin,

I'm cc'ing this to Peter and Steve; hopefully they can correct me if I'm
wrong here, though I think Peter is on vacation now.  The frequencies that
we need are:

To be used for high-precision timing:
- CAEN TDCs: 25 MHz, 50% duty cycle, ECL levels 
  * three of these; can be daisy-chained
- ePC COMET compressors: 50 MHz, 50% duty cycle, NIM levels
  * fanned out by controller module
- g-2 WFDs: 200 MHz sine wave
  * g-2 clock fanout box already being used

Probably not to be used for high-precision timing:
- TDC400s: 5 MHz, 50% duty cycle, ECL levels
  * seven of these; can be daisy-chained
- Struck flash ADCs: internal clock will be fine

Thanks,

-- Fred

-- Fred Gray / Visiting Postdoctoral Researcher                         --
-- Department of Physics / University of California, Berkeley           --
-- fegray@socrates.berkeley.edu / phone 510-642-4057 / fax 510-642-9811 --