Safety pre cau tions. i, Pur pose and func tion. 1, De scrip tion. 1 – Bird Technologies 6156 Manuale d'uso
Pagina 13: Purpose and function, Description, Introduction
Chapter 1
Introduction
Purpose and
Function
This instruction book is intended for use by operators of the
Models 6104, 6154 and 6156 Termaline Wattmeters. These
wattmeters measure RF power under nonradiating condi-
tions. They provide a practically reflectionless, 50 ohm, line
termination for up to 1000 MHz. Refer to the Specifications
section for individual unit specifications.
The Models 6104, 6154, and 6156 Wattmeters are intended
for general field and laboratory use on CW, AM and FM
modulation envelopes.
Description
The Termaline Wattmeter consists of an RF coaxial load, dc
cable, meter, crystal diode, and the housing.
The load is comprised of an RF coaxial load resistor assem-
bly encased in a finned radiator. A voltmeter is mounted to
the radiator. A 3-1/2 foot coaxial cable, RG-58/U, connects
the resistor voltmeter assembly to the meter. The meter is
sealed and shock mounted on its housing.
A crystal diode is furnished with the wattmeter. The diode
is housed in the resistor-voltmeter assembly.
Power input is measured by a four range crystal voltmeter
indicating directly in watts. Flipping the toggle switch de-
termines the scale. Each scale has two ranges which are se-
lected by plugging the crystal diode into the proper socket.
The fully assembled unit is shown in figure 1.
1