Summary of Comments from TOF Trigger Review
        -------------------------------------------

In general the reviewers felt that this project is in good shape and saw no
major technical problems.

1. The designers should make a serious effort to include DAQ readout of the
input and output data from the TOTRIB board.  This will make commissioning and 
future debugging much easier. This should include the bunch counter information
in the board header word.  

To implement this, the designers are encouraged to read CDF note 2388
for the specifications on what should be implemented.  Greg Feild
(feild@fnal.gov, 630-840-8422) has agreed to provide help on
implementation within a XILINX design.  

This will require expanding from 16 bit VME databus to a 32 bit
design.  If for some reason the DAQ readout is not feasible. Contact
should be wade with the CDF DAQ group (Frank Chlebana) to ensure that
they are prepared to deal with the planned 16 bit data.

2. A Printed Circuit Board review should be scheduled with Bob DeMaat
(demaat@fnal.gov, 630-840-2188).  Given that the prototypes are likely
to also be the production boards the review should occur before board
fabrication is started.

3. The compatability of the design with the muon Matchbox should be
verified with Eric James prior to fabrication.


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Comments from Individual Committee Members:


From Bob DeMaat:

Hi Peter,

Here are a couple of recommendations resulting from
the TOF Trigger Electronics review.

Since VMEbus readout of the TOTRIB will be implemented
utilizing only the upper 16 bits of the data bus, this
information should probably be run past Frank Chlebana
or Jim Patrick to ensure that there won't be predictable
adverse side effects that result.

When we conduct the TOTRIB PCB review later in October
we should probably also take a look at the Channel Swapper
board.

Bob

------------------------------------------------------------
From Greg Feild:


Hi Peter,

Here's what I remember being interesting or important
from Monaday's TOF review.

Greg

1) Add DAQ readout - Will need L1 pipeline, L2 buffers,
   the relevant TS signals from J2 and all 32 data lines.

   (I'd be happy to lend advice on this.  They should
   start by reading the front-end crate note 2388)

2) They should try to load appropriate pedestal and gain
   corrections such that there is only one trigger threshold
   for all channels for a given MIP or HIP.

3) The ADMEM registers will  have to be loaded according to
   the trigger table and/or calibration database.
   We should give Arnd and co. plenty of lead time/warning.

4) It seems they might have been expecting more functionality
   from PFRED than is available due to sharing constraints, etc.
   I think this was resolved.  We should make sure the muon
   matchbox card can do everything they expect as well!

5) I liked the idea that they might want to design the
   trigger card such that we could switch from a pulse
   height trigger to a timing trigger if that became interesting ...


Overall, I'd say they were in good shape.

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From Carla Grosso-Pilcher:

Hi Peter,

I don't really have more comments beside the ones that were raised at the 
meeting.  I think we can't emphasize enough the importance of having readout 
buffers, both for commissioning and for diagnostics and validation.
One thing that I'm not sure it was mentioned, or I missed it: how many trigger 
bits are they going to use.  We don't have many free bits at the moment.

carla 


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From Terri Shaw:


Hi Peter,
I am attaching a pdf file which describes the changes in the ADMEM
firmware to implement the threshold comparisons for the TOF.

Other than that, I would agree with the main issues brought up during
the review.  It would be a good idea to implement the DAQ buffers using
standard CDF protocol.  And secondly, a thorough review of the PCB
should be done by the PCB Review group before it is manufactured.

Terri

----------------------------------------------------------------------
From David Stuart:


Hi Peter,

We were supposed to send you comments about the TOF trigger review...

My only comment is that the project seems to be well under control.
I asked questions about dynamic range and triggering  flexibility which
were answered satisfactorily. I think that the only recommendation that
came up was to allow readout of the TOTRIB. Beyond the debugging uses
mentioned, I think that is worth doing to allow future use of the bits in
L2 which could be useful at high luminosity.

- David