User's Manual

800MHz & VHF Cell Enhancers
Maintenance Handbook
H/book Number:-50-078001HBKM
Issue No:-
A
Date:-02/09/2004
Page:-
58 of 88
5.11 6dB Power Monitor (07-014002)
5.11.1 Description
The purpose of these couplers is to tap off known portions (usually 3-30dB) of RF signal
from transmission lines, either resistively or by induction, and to combine them, for
example through splitter units for different purposes (alarms/monitoring etc.), whilst
maintaining an accurate 50Ω load to all ports/interfaces throughout the specified frequency
range. They are formally known as directional couplers as they couple power from the RF
mainline in one direction only.
Various constructional techniques are used depending on the specification required. These
include microstrip, stripline, coaxial cable and capacitive types.
5.11.2 Technical Specification
PARAMETER SPECIFICATION
Frequency range: 170 – 2200MHz
Insertion Loss: <0.3dB
Coupling level: -6dB
Rejection: N/A
Weight: <200gms
Connectors: N type, female
operation: -10°C to +60°C Temperature
range:
storage: -20°C to +70°C