1
Introduction
2
N432A User’s Guide
LXI Class-C Compliant N432A
The N432A is a single- channel, average RF power measurement meter that
supports thermistor sensors. The N432A has the capability to measure and
display average power, RF bridge voltages (V
RF0
and V
RF1
), compensation
bridge voltages (V
COMP0
and V
COMP1
), V
0
, and V
1
. It is also provided with
a set of features such as zeroing and a built- in self- test.
The N432A basic configuration consists of two key sections; bridge and
meter logic. When a compatible thermistor sensor is connected to the
N432A, the RF and compensation bridge circuits are formed in the bridge
section. V
RF
, which is the voltage at the top of the RF bridge, is responsive
to both input RF power and ambient temperature changes. On the other
hand, V
COMP
, which is the voltage at the top of the compensation bridge,
is responsive only to ambient temperature changes. The V
RF
and V
COMP
values are used in calculating the RF power. Meanwhile, the meter logic
section processes V
RF
and V
COMP
to produce a meter current proportional
to RF power.
In general, the N432A is an easy- to- use instrument especially with the
availability of an integrated Web browser that provides a convenient way
to view and modify the instrument network configuration.
Besides the LAN interface, the N432A also supports industry standard
GPIB and USB interfaces for measurement automation.
Developed using LXI technology, the N432A is an LXI Class- C compliant
instrument. LXI, an acronym for LAN eXtension for Instrumentation, is an
instrument standard for devices that use the Ethernet (LAN) as their
primary communication interface.
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