Terminal Server Access for HV Control and DAQ-CPU

General Information

The two mainframes for the high voltage detector bias supply and the terminal access of the frontend CPU are controlled by serial interfaces connected to a terminal server located in room 40/108. One can connect from any terminal by
telnet name-of-the-terminalserver port or take the locally connected ASCII terminal.
Keep both parameters in your mind and don't write them down, since we don't want somebody to fry us. The best way to connect to the terminal server's ports is to telnet to the port first and then to switch on the respective module. Otherwise, the terminal server port is blocked from time to time.

High-Voltage Control

Right now, there are two HV mainframes used for the NaI detector and the HPGe/BGO detectors, resp. The stuffing scheme and recommended settings are listed in the following table:
Detector Serial number Crate Slot Channel Cable HV
HPGe #1 � SY527 06 06.10 1 -4.500 kV
HPGe #2 � SY527 08 08.10 2 +4.500 kV
HPGe #3 � SY527 06 06.11 3 -4.800 kV
HPGe #4 � SY527 08 08.11 4 +5.000 kV
Cluster #1   SY527 09 09.00 29 +4.600 kV
Cluster #2   SY527 09 09.01 30 +4.000 kV
Cluster #3   SY527 09 09.07 31 +1.800 kV
Cluster #4   SY527 09 09.03 32 +4.000 kV
Cluster #5   SY527 09 09.04 33 +4.000 kV
Cluster #6   SY527 09 09.05 34 +4.500 kV
Cluster #7   SY527 09 09.06 35 +4.500 kV
BGO #1 E045 SY527 05 05.00 5 +850 V
BGO #2 293 SY527 05 05.01 6 +850 V
BGO #3 � SY527 05 05.02 7 +850 V
BGO #4 � SY527 05 05.03 8 +850 V
BGO_EDGE   SY527 05 05.04   +950 V
BGO_SIDA   SY527 05 05.05   +950 V
BGO_SIDB   SY527 05 05.06   +950 V
BGO_BACK   SY527 05 05.07   +1000 V
BPM #1   SY127     36  
BPM #2   SY127     37  
BPM #3   SY127     38  
BPM #4   SY127     39  
NaI #1 HV / Booster SY127     10/11 -1500 V / -750 V
NaI #2 HV / Booster SY127     12/13 -1454 V / -750 V
NaI #8 HV / Booster SY127     14/15 -1390 V / -750 V
NaI #4 HV / Booster SY127     16/17 -1527 V / -750 V
NaI #5 HV / Booster SY127     18/19 -1603 V / -750 V
NaI #6 HV / Booster SY127     20/21 -1522 V / -750 V
NaI #7 HV / Booster SY127     27/28 -1500 V / -750 V
Reminder: Each CAEN HV module A734 (BGO HV) needs a terminated input at the LEMO connector labelled "HV EN"!

Hardware Description of the Terminal Server

The terminal servers have a 6-pin RJ-MMJ serial interface which needs a special connecting cable. The wiring scheme is displayed in the picture below:



The connectors of the communication interface on both HV mainframes are Cannon DB25, female. You may find more information about D-SUB connectors here. Both follow the terminal wiring scheme as shown in the middle row.