[Halld-tracking-hw] HVB - FINAL VERSION - and fADC

[Gerard Visser]

Hi Curtis,
	I believe that the full scale input of the ADC125 corresponds to about 0.5V 
(differential, on the double-terminated cable) at the ASIC output. Of course, 
since there is intentionally some shaping this has to be interpreted with a bit 
of care. [But the shaping is pretty similar to that of the old shaper board + 
Struck ADC.]
	I can set up and measure this for us again to reconfirm the value. I'll try to 
do so before the meeting wednesday.

	- Gerard

p.s. A re-measurement of the linearity of the GAS-II/cable/ADC125 is probably 
also a good idea, though I may not be able to do that by wednesday. It's of 
course really the linearity plot which will tell us if the ADC125 range is well 
matched to the GAS-II/cable. (Others are encouraged to measure it too...)

On 4/11/2011 9:54 PM, Curtis A. Meyer wrote:
.... Does the input of the FADC-125 match the 0V to 0.5V output of the
> ASIC, or
> is it something else?
>
> Curtis