I have attached a table we made last year showing the cable lengths.
These are based on already installed configuration. Joe has added 7' to
the numbers. This is good since there will be additional length needed
for installing the FDC and CDC. This of course should be revisited for
the final assy.
Cheers,
Tim
Joe Beaufait wrote:
> The longest run calculation done on autocad showed 52 ft, I made the
> test cables 59' or 18 meters. the 3m connectors are difficult and I
> would suggest sending assemblies out for construction.
> the cables I delivered today are not guaranteed.
>
>
> Gerard Visser wrote:
>> Hi Fernando,
>> I'm not sure if you're asking about this - but I don't believe
>> there is any hard constraint from the electronics design that we are
>> approaching yet with 21 m cable lengths. I have a (hastily designed)
>> equalization circuit working with a 21 m cable and it has about 11.7
>> bits of dynamic range and ~7 ns risetime, it should be enough. I
>> don't think we could have 100 m cable, but I think anything less than
>> 25 m is certainly reasonable.
>> To design and test, though, I believe we want to get to more
>> specific planning of the lengths now (or as soon as practical). That
>> was my main point.
>>
>> Gerard
>>
>> Fernando J. Barbosa wrote:
>>> Hi Gerard,
>>>
>>> Yes, we really need to have a table like the one you suggest. It is
>>> especially important to know the maximum lengths given the constraints
>>> on shaping, gain and dynamic range for both the fADC-125 and the ASIC.
>>>
>>> Regards,
>>> Fernando
>
>
>
WORST_CASE_CABLE_LENGTH_CHART.xls