Atec Anritsu-S412D - Manual (Page 5)

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Spectrum Analysis – Anywhere, Anytime
The S412D LMR Master integrated spectrum analysis capability provides the “ultimate” in measurement flexibility for
field environments and applications requiring mobility. With the S412D you can locate, identify, record and solve
communication systems problems quickly and easily, and with incredible accuracy – making it a perfect solution for
conducting field measurements in the 100 kHz to 1.6 GHz frequency range.
Smart Measurements
The LMR Master has dedicated routines for smart measurements of field strength, channel power, occupied bandwidth,
Adjacent Channel Power Ratio (ACPR), Carrier-to-Interference and interference analysis. These are increasingly critical
measurements for today’s wireless communication systems. The simple interface for these complex measurements
significantly reduces test time and increases analyzer usability.
Adjacent Channel Power Ratio
A common transmitter measurement is that of adjacent channel leakage
power. This is the ratio of the amount of leakage power in an adjacent
channel to the total transmitted power in the main channel. This measure-
ment is used to replace the traditional two-tone intermodulation distortion
(IMD) test for system non-linear behavior.
The result of an ACPR measurement can be expressed either as a power
ratio or a power density. In order to calculate the upper and lower adjacent
channel values, the LMR Master allows the adjustment of four parameters to
meet specific measurement needs: main channel center frequency, measure-
ment channel bandwidth, adjacent channel bandwidth and channel spacing.
When an air interface standard and channel are specified in the S412D, all
these values are automatically set to the normal values for that standard.
AM/FM Demodulator
A built-in demodulator for AM, narrowband FM, wideband FM and
single sideband (selectable USB and LSB) allows easy identification
of interfering signals.
Occupied Bandwidth
This measurement calculates the bandwidth containing the total integrated
power occupied in a given signal bandwidth. There are two different methods
of calculation depending on the technique used to modulate the carrier. The
user can specify percent of power or the “x” dB down point, where “x” can
be from 1 dB to 120 dB below the carrier.