Re: Additional data

[Yves Van Haarlem <yvhaarle@ernest.phys.cmu.edu>]

Hi Gerard,

For your information: I used a

KINGS LEMO 1079-1 splitter. Unfortunately a google search did not give me 
the specifications of this splitter.


Cheers,
 	Yves

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On Wed, 18 Jun 2008, Gerard Visser wrote:

> Hi Yves,
> 	Why do you not trigger the ADC readout internally? The Struck ADC 
> certainly has this capability. Isn't it supported by the JLab/CODA setup? It 
> would be really best to avoid splitters etc. on your analog signals. Unless 
> you've verified them by for instance a network analyzer sweep up to at least 
> 100 MHz... Don't trust a homebrew splitter without such a verification, if 
> the signal shape is important.
> 	If the DAQ setup cannot be triggered internally from the ADC, you 
> should nevertheless at least be able to use the ADC's internal trigger 
> features, set for front panel LEMO trigger out, and connect that to the DAQ 
> system trigger interface as per usual (as you would with your cosmic paddle 
> trigger).
>
> 	Gerard
>
> Yves Van Haarlem wrote:
> ...
>> A collimated (0.5~mm) Fe-55 source is placed close to the straw. The
>> signal coming from the straw is preamplified and shaped. After the shaper
>> the signal is split in two, using a passive LEMO splitter. One part goes
>> to a discriminator (it is not a CFD) afterwards it is delayed a bit and
>> triggers the fADC. The other part goes directly to an fADC input.
>> ...
>