Online telecon notes for July 17, 2002.
Attending:
- Zhigang Wang (UCSC/TKR)
- Connie Houchens (GSFC/ACD)
- Byron Leas (NRL/CAL)
- Curt Brune (SLAC/FSW)
- Mike Huffer (SLAC/ELX)
- Larry Wai (SLAC/I&T-IFCT)
- Selim Tuvi
(SLAC/I&T-Online)
- Ric Claus
(SLAC/I&T-Online), minutes author
- Core Online (Ric and Selim)
- Learned that SCL constraints can’t work in the current
architecture
- Constraints aren’t meant to operate on fields other than the
default field
- Making them work is a big job, according to ICS
- Decided that Python’s usage in test-stands is acceptable
- Realized that Byron’s performance issues are probably due to SCL
RTE’s giving up the CPU to allow other threads to execute, even when
there are no other threads. This
costs on the order of one 60 Hz tick per SCL script line. Spawning the script with real-time
priority (15 and above) solves this. Post meeting note (Selim): I looked into setting the
priority globally and looks like it is not possible, so it needs to be
specified as part of the "execute" command syntax.
- Supplied various TKR support
- Online/Subsystem ICD posted although it’s still not complete
- CAL (Byron)
- Received new temCalRegress from Byron
- ACD (Connie)
- Studied hippo & python
- Worked on some LabVIEW screens for the ACD
- TKR (Zhigang)
- Waiting for Online workstation
- Online will either ship it to him or he will take it with him
when he comes to SLAC for training
- Zhigang to e-mail D. Nelson to coordinate training
- ELX (Mike)
- Bid for new TEM fab went out today
- Expect to have one board ready for loading by the end of next
week
- AEM board no progress due to AFE board work
- AFE board nearly complete, so AEM work should resume soon
- Test-stand 2:
- Power supply assembly:
- Three additional features to those previously reported:
- Physical characteristics (size,
thermal model) will match the flight unit
- Will take 28 volts as input
(requires wall power to 28 VDC converter, also supplied)
- Output voltages will be controllable
to test margins
- Memo to describe these supplies is in progress
- D. Nelson has started work to fabricate these assemblies
- As many will be produced as needed (one per test-stand,
possibly partially populated, as needed)
- LCB work in progress
- Replaces the current one or two LAT-COMM VME cards
- Two versions of this board will be produced
- PMC board for plugging onto the MVME2306 SBC
- cPCI module
- Software interface to test-stand users will not be different
from the LAT-COMM interface
- Performance will be much better than the LAT-COMM solution
- Curt is working on the driver specification
- IFCT (Larry)
- Wants to set up scripts to analyze event data to verify
electronics and detector operation, e.g. is an event containing CAL and
TKR data self consistent
- To develop and test the scripts there are a couple of possible
modes of operation
- Data comes from the hardware
- Inject Monte Carlo data at the SBC or NT level as if it’s
coming from the hardware
- Issue of event format
- Online has raw data format available, but no parsing tools
- Right answer is to use FSW’s filter output format, which is not
yet public
- JJ has ability to generate event data with a Monte Carlo which
may be useful to Larry