[Halld-pid] [New Logentry] TOF PMT TDC response

[Alexander Ostrovidov]

On Monday, March 09, 2015, Fernando J Barbosa wrote:
> Hi Sasha, Beni,
> 
> I took some measurements on a spare splitter which is well matched to 
> the coax cables and there are no reflections. Reflections are possible 
> if the devices (fADC250, Discriminator, Splitter) have been incorrectly 
> assembled.
> 

Thanks, Fernando.So, there were no reflections in your test setup.
But reflections of the actual TOF pulses are real. They are seem on the
scope, in fADC pulse shape, in TDC double hits. Something is causing
them. I guess the only way to resolve this puzzle is to look at the actual
TOF pulses in the hall.

Sasha