Operation; Tools And Materials; Turn-Up Unit And Verify Operation - ADC DIGIVANCE User Manual

3 OPERATION

This section provides guidelines for turning-up the RIU, verifying that the RIU is operating
properly, setting the forward and reverse path signal levels, and correcting any installation
problems.

3.1 Tools and Materials

The following tools and materials are required in order to complete the procedures in this section:
•
Portable spectrum analyzer or network analyzer
•
Pencil or pen
•
Writing pad

3.2 Turn-Up Unit and Verify Operation

The process of turning-up the RIU and verifying operation involves setting the forward and
reverse path signal levels, turning on the power, verifying that the LED indicator shows normal
operation, and then measuring the forward and reverse path signal levels. Refer to Table 3 for a
detailed description of the ALARM LED indicator.
INDICATOR
ALARM
Use the following procedure to power-up the system:
1. Temporarily disconnect the alarm system or notify the alarm system provider that testing
is in progress.
2. Adjust the forward and reverse path signal levels as specified in sections 3.3 and 3.4.
3. Verify that the donor antenna is properly installed and connected.
Note: To comply with Maximum Permissible Exposure (MPE) requirements, antennas must be
installed to provide at least 20 centimeters (8 inches) of separation from all persons per FCC
47 CFR part 2.1091.
4. Verify that the RIU is connected to the appropriate AC outlet.
5. Place the ON/OFF switch on the RIU in the ON position (press I).
6. Verify that the ALARM LED on the RIU turns green.
7. Check the forward path RF signal level at the DHU RF IN port and verify that the DHU
input signal level is –20 dBm. Re-adjust FWD LEVEL ADJ rotary switches to add or
remove gain if required.
Table 3. Remote Interface Unit LED Indicator
COLOR DESCRIPTION
Indicates if the RIU is normal or if a fault is detected.
Green RIU in normal state, no faults detected.
Yellow High temperature fault detected. (Minor alarm)
Red Over or undercurrent fault on power amplifier detected. (Major alarm)
Off AC power off or RIU internal fault.
ADCP-75-114 • Issue C • June 2001
Page 17
© 2001, ADC Telecommunications, Inc.