Appendix B: 75-Ohm CATV Cable
Page 20
InterReach Spectrum Remote Access Unit Installation Guide
©
2012
TE
Connectivity
Ltd
TECP-77-222 • Issue
1 • August
2012
A
PPENDIX
B:
75
‐
O
HM
CATV
C
ABLE
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 power 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.
•
carries 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:
TE
Connectivity
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
