Bird Technologies 4314B - Manual (Page 15)

3
Chapter 2 Installation
Portability
The Model 4314B is a portable instrument; the housing is not designed for fixed
mounting. A strap is provided for
carrying purposes.
When transporting the Thruline Wattmeter, it is best to insert the original dust
plug, or a Plug-In Element with the arrow pointed down, in the measuring
socket, and secure it with the catch. This will shunt the meter circuit and serve
to protect it by dampening the pointer action during handling or shipping. Also,
set the wattmeter controls to ON and CW modes. In this position, any unneces-
sary battery drain will be avoided. Handle the Plug-In Elements with care at all
times as their calibration could be disturbed if they are dropped.
Connections
The Model 4314B Wattmeter is normally supplied with two Female N type connec-
tors which are of the Bird Quick-Change “QC” design. Other “QC” connectors are
available as listed in the Replacement Parts. See “Replacement Parts” on page 31.
1.
Insert the Model 4314B Thruline Wattmeter in coaxial transmission lines of
50 ohms nominal impedance.
Note: The signal source and load connections can be made to either
side of the wattmeter with no difference in effect. Use a coaxial trans-
mission line fitted with suitable matching RF connectors. If cables of
other than 50 ohms impedance are used, a mismatch will occur which
could cause serious inaccuracies in the readings.
CAUTION
Do not drop the Thruline Wattmeter or its elements or subject them to hard
blows. The microammeter is shock mounted in the wattmeter housing, but its
delicate mechanism may be damaged by severe impact.
WARNING
Exposure to RF power radiation and the possibility of RF shock or burns exists
with some operating conditions. Always be sure to turn off the transmitter
when connecting or disconnecting a wattmeter.
Be sure the 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.