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- If the buffer for the Configure dgram (in /usr/lib/systemd/system/tdetsim.service) is specified to be larger, it wins. Otherwise it’s the Pebble buffer size. The Pebble buffer size is derived from the tdetsim.service cfgSize, unless it’s overridden by the pebbleBufSize kwarg to the drp executable
XPM
xpm numbering
amc1 on left, amc0 on right
ports count 0-6 from right to left, matching labelling on xpm
LEFTMOST PORT IS UNUSED (labelled 7 on panel)
in fee, xpm0 was lowest slot (above switch), xpm1 one up
pyxpm 2 is fee (currently the master), 4 is hutch, 3 unused
epics numbering of xpm 0 2 1
Resetting
The timing system should come back up. If not, use a machine with afs (psdev01, pslab03?)
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'amcc_dump_bsi --all shm-tst-lab2-atca02/2' (from psdev) will tell you if the slot 2 xpm (XPM:2) ethernet link is up.
Light Levels
Can check light levels going into the xpm by looking at EPICS variables like this:
| Code Block |
|---|
(ps-4.1.2) tmo-daq:scripts> pvget DAQ:NEH:XPM:0:SFPSTATUS
DAQ:NEH:XPM:0:SFPSTATUS 2021-01-13 14:36:15.450
LossOfSignal ModuleAbsent TxPower RxPower
0 0 6.5535 6.5535
1 0 0.5701 0.0001
0 0 0.5883 0.7572
0 0 0.5746 0.5679
0 0 0.8134 0.738
0 0 0.6844 0.88
0 0 0.5942 0.4925
0 0 0.5218 0.7779
1 0 0.608 0.0001
0 0 0.5419 0.3033
1 0 0.6652 0.0001
0 0 0.5177 0.8751
1 1 0 0
0 0 0.7723 0.201 |
XPM Timing Links Not Locking
If XPM links don't lock, here are some past causes:
- check that transceivers (especially QSFP, which can be difficult) are fully plugged in.
- for opal detectors:
- use devGui to toggle between LCLS1/LCLS2 timing (Matt has added this to the opal config script, but to the part that executes at startup time)
- hit TxPhyReset in the devGui (this should now be done in the opal drp executable)
- for timing system detectors: run "kcuSim -s -d /dev/datadev_1", this should also be done when one runs a drp process on the drp node (to initialize the timing registers). the drp executable in this case doesn't need any transitions.
- hit Tx/Rx reset on xpmpva gui (AMC tabs).
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