Chapter 1 - Introduction
This publication refers to the Wattcher RF Monitor/Alarm models 3126A, 3127A, and 3128A.
The differences between models are listed in the specifications. All models will generally be
referred as a Wattcher Unit throughout this manual.
The information in this instruction book pertains to all models except noted differences referred
to in the text.
The Bird Wattcher RF Monitor/Alarm—when installed with a dual port Thruline Line Section
and two elements—is designed for the protection and monitoring of radio frequency transmission
systems. The line section is selected to be compatible with the RF coaxial line used in the
transmission system. The elements are selected by the user to cover the desired power levels and
frequency ranges.
Purpose and Function
Abnormal loading conditions cause the transmitter to quickly shutdown, a user selectable audible
alarm to sound, and an alarm LED to flash.
Remote access is available for resetting audible and visual alarms. Fail-safe or non fail-safe modes
are user selectable and the reflected power trip level is adjustable. Operating Instructions in
Chapter 4 detail these features.
Figure 1
Outline Drawing
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