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See Matt's page of information here: ePixHR Beam Test DAQ

BLD Reception

The LCLS2 DAQ release has tools analogous to the LCLS1 DAQ for debugging BLD reception issues.  The application in the LCLS2 DAQ release can be run as

(ps-4.5.16) bash-4.2$ xcasttest -i eno1 -a 239.255.25.0 -p 10148 -r
Using interface eno1 (172.21.156.23)
dst[0] : efff1900.10148
Joined efff1900 on if ac159c17
received from 172.27.28.14:31111
Packets  117.98  Pkts:  Bytes   26.43 kB
Packets  119.98  Pkts:  Bytes   26.87 kB
Packets  119.98  Pkts:  Bytes   26.87 kB

The application should be run on a DRP node like drp-neh-cmp002.  Address 239.255.25.0 is SXR EBEAM and port 10148 is the standard port for NC BLD sources.  The addresses for other BLD sources is found in the table below.

Note that the EBEAM BLD is a concatenation of several data sources.  As such, there may be problems with one of the sources that contributes.  That is evident in the "damageMask" field of the EBEAM BLD.  This can be seen in AMI or for extreme experts in the raw dump of the multicast reception (argument -d of xcasttest).
A common problem in the EBEAM BLD source is that the L3Energy calculation often fails after the accelerator changes beam energy and does not update their internal alarm limits to the calculation.

BLD Data Formats

(from Matt Weaver)

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