Reliability and performance (Jay) (see Presentation)
Triangular bandpasses for some subb. e.g. Noto (DDC 16 MHz); Could there be a DDC problem?
N16M1 Eff no LCP; IF5R always low amp
low power (ca. 1/2) often for some stations (state counts fine though)
need feedback related to potential backend problems
correlate DBBC software/firmware versions in the logs against problems found (put in soon by FS?)
Amplitude calibration
Jb bad as usual, worse than before,
Sh Problem
Good long-term plots showed
POSTOB mechanism still possible?
DBBC2
Gino's presentation
V16 needs latest test version of FS
Problem of 15_2 not seen with latest V16 in last weeks test
Recorders
VDIF fits better with Ethernet output of FiLA10G
New features of new test version of JIVE5ab (see presentation);
multiple FiLA streams now possible local recording only, bookkeeping per sender,
tuning for very high data rate needed. see docu on web
scan_check: problem because of no sync word, no wall clock, degenerate bit-rate - threads, sync word of VLBA would help a little, use extended header to solve the problem?
Irbene slowly getting on-line; eMERLIN slow progress as VLBI has low priority.
eVLBI; limited at 2 Gbps; Kvazar 1 Gb total
Technical Developments
4 Gbps as ususal: equipment needed
Triggered observations - nothing
New Flexbuff utilities: vbs_ls, vbs_rm, vbs_fs option -6 for Mark6; vbs_ls -lrth; -T option gives sizes for patterns
check performace of vbs_fs on Mark 6! Cache issue in OS, --quick option. touch for trigerring indexing
Graphical tool for mcopy, drag and drop
VGOS tests with 2 DDBC2s and 8 Gbps to 1 Mark 6: Firmware problems in DBBC2, problems with Mark 6
DBBC3 ad
JIVE spiel
Meerkat as VLBI element
jumping jive: Geodesy?
FS (see presentation) 9.11.16 with good changes, additions, and if command
KVN Python FS !!
Leonid: Use numerical weather models to get opacity. Thomas should talk with him.
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