Re: Struck ADC test clock source

[Gerard Visser <gvisser@indiana.edu>]

Hall D Electronics:

Hi Fernando,
	I think this sounds like a good plan. I'm sure that Kim and I will be 
able interact profitably, especially if she will be doing this work in 
P-CAD. We will make it so that all parts are hand-solderable, there's no 
need for leadless IC's except for the oscillator but that is still 
easily hand-solderable.
	I agree that it will take about 4 weeks at best before the users have 
these things in hand. Improving that is not feasible without heavier 
involvement from you or me and this is not a good option right now.
	In the meanwhile, I suggest that any test data taking that relies on 
precise timing from the ADC's be restricted to one 8-channel Struck 
module running from it's internal clock. At least in particular for the 
CDC; the FDC can carry on with the 8082A and passive splitter if that 
happens to work good enough in practice.

	Gerard

Fernando J. Barbosa wrote:
> Hi Gerard,
> 
> I am out with the cold. I have some suggestions regarding the clock circuit.
> 
> I really cannot commit to do any real work on the circuit that you
> provided other than just provide some guidance to Kim once she's doing
> the layout. I am also forwarding your diagram to Kim Shinault
> (kshinaul@jlab.org).
> 
> Interacting with Kim will be easy as you also have PCAD. My suggestion:
> 
> 1. Kim will generate a schematic starting from your diagram and
> interfacing with you for cross-checks.
> 
> 2. Kim will layout the board. I can provide some guidance, if needed.
> 
> 3. Kim will procure the boards and assembly in-house. Perhaps 10 units
> is a good idea for future use. It will be easy to get additional ones
> later, if needed.
> 
> 4. The units will be shipped to you for testing and QA
> 
> As for schedules, I believe this will take over 4 weeks from start to
> delivery to users. Dan, Curtis, Yves and Simon need to plan accordingly.
> 
> Regards,
> Fernando