Bird Technologies 3140 Display - Manual (Page 11)

Introduction
1
Chapter 1 Introduction
The Transmitter Power Monitor (TPM) is the latest broadcast solution
from Bird. Calibrated coupling ports and accurate power measure-
ment combined in the same unit provides for easy use and accurate
readings. The TPM is the first inline power monitor that can be cali-
brated in-line and on site minimizing downtime and optimizing on-air
time. In addition, a simplified interface allows for a high level of
customization and integration.
Purpose and Function
The TPM is used to measure power signals in broadcast systems. It is
used directly in line with the system being tested. It’s output provides
a linear DC voltage output from 0 to 4 volts allowing for a wide variety
of interface options. It’s in-line calibration capability allows for greater
accuracy in a single application (with an accurate power reference) and
its integrated non-directional coupler allows for signal analysis in
minimal space requirements. It is available in 7/8”, 1 5/8”, and 3 1/8”,
50 ohm lines for FM, VHF, and UHF broadcast frequencies.
When combined with a Bird model 3140A4 or 3140A8 Transmit Power
Meter (TPM) display, a complete adjustment system is achieved. The
display supplies a visual indication of Forward and Reflected power
being sampled by the inline TPM. Multiple TPM’s can be selected
(only one per channel setting) to give the operator an overall condition
of the transmitter system.
3140 Panel
TPM7
TPM1