User Manual

ADCP-75-158 • Preliminary Issue A • June 2003 • Section 3: Host Unit Installation

Page 3-9

possibly damage the HU receiver. Refer to Section 4, Subsection 2.3, before completing the

forward path connection at the BTS. If the Conditioning Panel or Duplexing Panel is required,

refer to the Digivance 800 and 1900 MHz Interface Panels User Manual (ADCP-75-147) for the

installation procedures. The HU should be mounted as close as possible to the BTS to minimize

cable losses. Use the following procedure to route and connect the forward and reverse path

coaxial cables to the HU:

1. Obtain the required lengths of high performance, flexible, low loss 50-ohm coaxial

communications cable (RG-400 or equivalent) for all coaxial connections.

2. Route the forward and reverse path coaxial cables between the HU and the BTS interface

(per system design plan) and cut to the required length. Allow sufficient slack for dressing

and organizing cables at the HU and for installing an external attenuator in the forward

path link.

3. Terminate each cable with an N-type male connector following the connector supplier’s

recommendations.

4. Connect the forward path cable to the FORWARD RF IN connector on the HU front

panel as shown in Figure 3-8.

Figure 3-8. Forward and Reverse Path Coaxial Cable Connections

5. Connect the reverse path cable to the REVERSE RF OUT connector on the HU front

panel (see Figure 3-8).

6. Dress and secure cables at the HU.

7. Complete all remaining coaxial connections as specified in the system design plan.

Note: Do not connect the forward path cable at the BTS until the composite forward path

RF signal level is measured and the amount of attenuation required is determined.

18655-A

TYPE-N MALE

CONNECTOR

FORWARD RF IN

CONNECTOR

(FORWARD PATH)

REVERSE

RF OUT CONNECTOR

(REVERSE PATH)