User's Manual

ADCP-75-187 • Preliminary Issue 1B • November 2005 • Section 3: OPERATION

Page 3-2

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 (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 all electrical and optical connections have been completed and that all optical

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

2. At the AC breaker box, make sure the circuit breaker for the circuit that supplies AC power

to the RU is in the open (off) position.

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.

Note: When connecting the equipment to the supply circuit, be sure to check equipment

nameplate ratings to avoid overloading circuits which may cause damage to over-current

protection devices and supply wiring.

Note: SCS systems that include a dual-band RU are comprised of two systems that operate

and function independently of each other. Each system can be independently turned-up,

tested, and placed into service. The EMS will recognize each system regardless of the

frequency/band and will display the appropriate screens. The frequency/band can be

verified by clicking on the HOST Host tab and on the REMOTE STM tab. The frequency/

band for the selected system will be displayed on the right side of the screen.