BIRD 4410 Series User Manual

Directional RF Thruline® Wattmeter, Series 4410
7
RF Power Measurements
WARNING
Exposure to RF power radiation and the possibility of RF shock or burns exist
under some operating conditions. Always turn off transmitter when
connecting or disconnecting wattmeter. Be sure transmission line is
terminated into a load or antenna. When a Plug-In Element is removed from
the RF line socket, the line section center conductor is exposed. Do not put
fingers or other objects into the plug-in element socket while RF power is
applied.
RF power measurements are made with plug-in elements inserted. Refer to
Figure 5 .
Figure 5 Measurement Direction
To Load To Transmitter
To Load To Transmitter
Forward Power Measurement
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Forward power is indicated when the arrow on the element points in the
direction of power flow; i.e., from transmitter to load.
Reflected power measurements are made with the element rotated 180° and
the arrow pointing toward the transmitter.
When the power measurements are being made, make sure the element is
rotated fully so that the element’s stop pin rests against the stop on the line
section, either in the forward or reflected position. Also be sure that the lock in
the lower left hand corner of the casting face presses on the shoulder of the
plug-in element to keep it in proper alignment and assure a good contact with
the DC connection and between the lower edge of the element and line section
body.

BIRD 4410 Series Specifications

General

Brand	BIRD
Model	4410 Series
Category	Measuring Instruments
Language	English