User Manual

ADCP-75-158 • Preliminary Issue A • June 2003 • Section 4: Operation

Page 4-2

1.2 Readiness Check

Before starting the turn-up process, inspect the complete Digivance system to verify that all

components of the system are ready to be powered-up. This will ensure that no units of the

system will be damaged during turn-up and that all existing systems will continue to function

properly.

1.2.1 Host Unit Installation Checks

Complete the following checks at the HU prior to starting the turn-up process:

1. Verify that the ON/OFF switch on the HU is in the OFF position (press O).

2. At the fuse panel, install a 3 Amp GMT fuse in the circuit that supplies DC power to the HU.

3. Using a DC voltmeter, verify that the DC voltage level at the HU power terminals is

between

± 21 to ± 60 VDC power (nominal ± 24 or ± 48 VDC). The DC power provided to

the HU can be either polarity.

4. Verify that all electrical and optical connections have been completed and that all optical

fibers, coaxial cables, and wires are properly routed and secured.

1.2.2 Remote Unit Installation Checks

Complete the following checks at the RU prior to starting the turn-up process:

1. Verify that the ON/OFF switch on the STM is in the OFF position (press O).

2. Verify that the MUTE/NORM/RESET switch on the LPA in the MUTE position.

3. At the AC breaker box, close the circuit breaker for the circuit that supplies AC power to

the RU.

4. Using an AC voltmeter, verify that the AC voltage level at the AC outlet is between 110

and 120 VAC (for 120 VAC powered systems) or between 220 and 240 VAC (for 240 VAC

powered systems).

5. Verify that all electrical and optical connections have been completed and that all optical

fibers, coaxial cables, and wires are properly routed and secured.

2 TURN-UP SYSTEM AND VERIFY OPERATION

The process of turning-up the system and verifying operation involves powering up the various

system components, verifying that the LED indicators show normal operation, setting the site

number and name, adjusting the RF signal levels, and adjusting the path delay.