User Manual

ADCP-75-136 • Issue 1 • November 2002
Page 40
© 2002, ADC Telecommunications, Inc.
11. Verify that the HOST PORT LED on the DEU turns green.
12. Place the PORT 1 ON/OFF switch on the DEU in the ON position (press I).
13. Verify that the PORT 1 OK/NOK LED on the DEU turns yellow (for approximately six
seconds) and then green.
14. Verify that the STATUS LED on the DRU connected to PORT 1 turns yellow (for
approximately six seconds) and then green.
15. Repeat the procedure covered in steps 5 through 14 for each of the remaining DHU
optical ports (ports 2 through 6) that is connected to a DEU or a DRU.
16. Reconnect the alarm system and notify alarm system provider that system is operational.
Table 7. Digital Host Unit LED Indicators
INDICATOR COLOR DESCRIPTION
UNIT
LED
Green
Yellow
Red
Off
Indicates when the DHU is normal or faulty.
DHU in normal state, no faults detected.
DHU high temperature fault detected. (see Note)
DHU fault detected (see Note).
AC power off to DHU or DHU internal fault.
PORT 1–6
OK/NOK
LEDs
Green
Yellow
Red
(steady)
Red
(blinking)
Off
Indicates if any connected DEU or DRU is normal or faulty or if the
optical inputs from any connected DEU or DRU are normal or lost.
All connected units in normal state, no faults detected.
High temperature fault detected in connected DEU. (see Note)
Fault detected in a connected DEU or DRU. (see Note)
No reverse path optical signal detected from a connected DEU or DRU or
excessive reverse path errors detected from a connected DEU or DRU.
(see Note)
Port disabled (via front panel switch) or DHU internal fault.
OVERDRIVE
LED
Green
Red
Indicates when the forward path RF input is below or above the
overdrive threshold.
RF input signal level at DHU below overdrive threshold.
RF input signal level at DHU above overdrive threshold.
Note: Detection of any fault will generate an alarm. A high temperature fault will generate a minor
alarm (yellow LED). All other types of faults will generate a major alarm (red LED).