Attenuation Setting; Alarming And Supervision; Functional Description Of The Alarming-Interface; Output-Contact Configuration - Andrew MP2003B User Manual

10.4.

Attenuation Setting

The attenuation can be set by means of a rotary
switch. Use a small screwdriver to turn the switch
carefully to the position for the required attenuation.
The label below the rotary switch shows the possible
positions and the corresponding values of the
attenuation.
Rotary switch for attenuation setting
When auto setup is selected, the MR2003 will
automatically set its gain to maximize its performance.
The DL gain will be set in a way to operate the
repeater at its maximum output power but not
exceeding the ALC limit. The UL gain will be set to the
value of the DL path.
If the level of the Node B signal increases, the
MR2003 will decrease the gain in DL and UL
automatically, however, the MR2003 will increase the
gain again in timely intervals of 24 hours if the level of
the Node B signal decreases.

11. Alarming and Supervision

11.1. Functional Description of the Alarming-
Interface
For alarming and supervision the MR2003 is provided
with an alarming interface represented by two LEDs
and output contacts:
LED 1 LED 2
M0041AFM.doc
Output connector
LED 1 LED 2
LEDs and output contacts
LED1: This three-colour
equipment status information:
off : no power feed
green : normal operation condition
orange: hardware alarm (out of defined
power-window) or LO does not lock
red : temperature of repeater too high
LED2: This one-colour
information about the ALC-status (Automatic
Level Control)
off : normal operation condition
red : ALC-Alarm, ALC active
11.2.

Output-Contact Configuration

6 GND
Output1
(TTL level)
5 Heartbeat
Hardware-
Output2 1
Alarm – C
(Optocoupler
Hardware-
output)
3
Alarm – E
Output3
2 ALC-Alarm – C
(Optocoupler
4 ALC-Alarm – E
output)
Output-contact configuration
LED provides visual
LED provides visual
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