BIRD 43 - Bird 4520 Series Thruline Wattmeters

Model Differences
43
Bird 4520 Series Thruline Wattmeters
The Bird 4520 RF Thruline Wattmeters (models 4521, 4522, 4523,
4525, 4526, 4527) are the same as the Bird 43, except that they are
panel mounted for rack installation. In addition, the Bird 4527 has a
RF sampler. These units are intended for fixed installation, generally
in rack mounts requiring 19” panels.
Installation
y Choose a location allowing easy reading and operation of the unit
and where the cables used will be short and without sharp bends.
y Avoid the use of angles and adapters.
y Make sure all connectors are tightened securely.
y Use four 12-24 screws to fasten the wattmeter panel to the rack.
Operation
The RF sampler on the Bird 4527 provides a low power sample of main
RF signal. This signal is available at the female BNC connector
labeled “RF SAMPLE”. The sampler output may be fed to any RF
signal suitable monitoring device; e.g. a frequency counter, spectrum
analyzer, or oscilloscope.
Bird 4520 Series Replacement Parts List
The mounting panel entry lists the panel styles for each model. Only
parts which are not used on the Bird 43 are listed here.