Download Chapter 5-Electronics - antares

PBS2.2.004: SCM_REP board (in SCM container)
Schematic of the SCM_REP board
The main specifications of the SCM_REP board are:
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Electrical to optical conversion between SCM_WDM board and each sector for clock
distribution function.
Electrical to optical conversion through the BIDIANT daughter boards plugged on
SCM_REP board.
The UNIV1 function allows monitoring of the Vbias and Vmonitor voltage of each
BIDIANT daugther boards and one temperature sensor.
Inside each SCM container, we have 2 SCM_REP boards in order to drive clock signals for
the 6 sectors of a line.
Interfaces inside SCM are:
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Clock electrical signal goes from SCM_WDM to SCM_CLOCK and SCM_REP (first) and
SCM_REP (second) in serial topology via a PECL twisted pair.
DAQ board for clock signal, reset/enable and slow_control RS485 bus by twisted pairs on
backplane
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SCM_WDM board with twisted pairs PECL ( clock signal) on backplane SCM_BACK.
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POWER_BOX for voltage (+5V and +3.3V) by backplane
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