12713020-002-2 Revision D – April 2004 SSU-2000 User’s Guide 85
Installing the SSU-2000
Normal System Indications During Turn-Up
SSU-2000 Main Shelf
To power up the SSU-2000 main shelf, insert the two fuses into the fuse slots on the
rear panel of the SSU-2000 main chassis (see Figure 2-13).
SDU-2000 Expansion Shelf
The SDU-2000 expansion shelf is not equipped with a Power switch. Power to the
SDU-2000 is controlled by two external power supplies that provide -48/60 vDC to
the SDU-2000 main chassis (A-BUS and B-BUS) at connectors J101 and J102. To
power-up the shelf, turn the power on to both power supplies.
Normal System Indications During Turn-Up
This section describes the procedures for bringing the SSU-2000 on-line after
completion of the system installation. After completion of the turn-up procedures,
complete the commissioning tests in Chapter 4, Commissioning to ensure that the
shelf is functioning properly.
As the shelf powers up and begins normal operation, the LEDs on the front of each
of the installed modules go through a sequence as follows:
Stratum 2E Clock Module – The POWER LED turns green and stays green when
the fuses are installed in the Main chassis. The STATUS LED blinks green and
amber for approximately 10 to 15 seconds and then stays green. The WARMUP
LED turns amber for approximately 30 seconds to 5 minutes; it then turns off and
the ACQUIRE LED turns green. The ACQUIRE LED stays green for 10 to 15
minutes until the module locks onto a signal, then the LED turns off. The
SELECTED LED turns green on the selected clock module after the ACQUIRE
LED on the clock module turns green. The LOCKED LED then turns green and
stays green.
Stratum 3E Clock Module – The POWER LED turns green when power is applied
to the unit and stays green. STATUS LED blinks green and amber for
approximately 10 to 15 seconds and then stays green. The WARMUP LED turns
amber for 30 seconds to approximately 20 minutes, then it turns off and the
ACQUIRE LED turns green. The ACQUIRE LED stays green until the module
locks onto a signal (10 to 15 minutes); then the LED extinguishes. The
SELECTED LED turns green on the selected clock module after the ACQUIRE
LED turns green. The LOCKED LED turns green and stays green.
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