User's Manual

Table Of Contents

Appendix B: 75-Ohm CATV Cable

InterReach Spectrum Remote Access Unit Installation Guide - Preliminary Update for Issue 3 Page 19

APPENDIX B: 75-OHM CATV CABLE

The 75-Ohm CATV Cable:

• connects the

IFEU to MRAU(s) and the MRAU(s) to the SRAU(s)

• transmits

(FWD) multiband and receives (REV) IF signals

• delivers DC electrical po

wer to the RAUs. The Spectrum IFEU DC voltage output

is +54Vdc nominal. If the IFEU reaches its current limit, a current-limiting

circuit protects it.

• carr

ies configuration and status information

• uses 75

 type-F connectors with captive center pins.

CATV Cable Requirements

Belden CATV cable or equivalent is required (see Figure 2).

• For the RG-6 cable

, use a Belden 1695A Coax.

• For

the RG-11 cable, use a Belden 7732A Coax.

RG-11

Belden 1695A Coax

RG-6

Belden 7732A Coax

NOTE: ADC requires solid copper center conductor CATV cable for proper DC voltage to the RAU and

maximum distances.

Figure 2. Belden 1695A and 7732A Coax Cables

• Use RG-6 or RG-11 CATV cable between the IFEU and MRAU, the typical

lengths of which are listed below.

Cable Type

Minimum Length Maximum Length

Meters Feet Meters Feet

RG-6 0 0 140 459

RG-11 0 0 200 656