Torun (Tr) Station Report
(TOG, Bologna, September 22nd, 2008)
Brief Report of Recent EVN Sessions Problems
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In the March 2008 session our observations suffered from frequent
(on scale of a minute) fringe
phase jumps. The problem was diagnosed only after session to be due to
malfunction of a 1pps amplifier between the formatter and the maser.
The entire 5cm part of the session was not observed due to a failure
of resolver in one of the azimuth drives.
The June session passed without any major problem.
Our 'Friend of FS', Greg Hrynek has left us on 31 July 2008. His VLBI duties
since May 2008 were assumed by dr Magdalena Kunert-Bajraszewska.
Changes/Upgrades Made to Hardware/Software
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A considerable progress has been achieved towards 10 Gb/s throughput
capability of our e-VLBI equipment. There is a 10 Gb/s switch (HP ProCurve 6410cl;
EXPReS funded) with transceivers HP 10GbE-ER in port 1 and HP 10GbE-SR in port 2.
The Mk5A recorder has now Intel PRO/10GbE network card with the ixgb ver. 1.0.126
driver.
FS 9.9.2 and Mark5A 2005y147d11h versions have been used in both sessions.
This past summer a new module has been built for distribution of frequencies
(1 MHz, 10 MHz, 20 MHz) and timing pulses (1 second, 10 seconds, 1 minute)
throughout the station. It already delivers 1pps signal to
the VLBI terminal (in place of the old connection using the amplifier that
caused phase jumps earlier, in the Session 1).
The station has participated in all regular, testing and demonstration
experiments organized by JIVE. Very recently (during August and September 2008
e-VLBI tests) the above mentioned new 10 Gb/s devices were checked to send data
properly to JIVE at typical rates of about 1 Gb/s.
Kaz Borkowski, Magda Kunert-Bajraszewska & Genek Pazderski