Cable, Antenna, Spectrum, Interference,
and P25 / iDEN Modulation Analyzer
From the Industry Leader in Handheld Field
Application Instrumentation – a Multi-Function
Land Mobile Radio Tester
The LMR Master from Anritsu is a single
instrument that combines all of the tools
required to install, maintain, and certify
Land Mobile Radio systems.
Easy-to-Use
In a single, lightweight, handheld, battery-operated package, the LMR
Master combines the functionality of a cable and antenna analyzer, spectrum
analyzer, interference analyzer, power meter, channel scanner, transmitter
analyzer (P25 and iDEN), transmission analyzer for 2-port devices (built-in
RF source), and GPS receiver.
This optimal combination of network test capabilities eases the job of a
technician by eliminating the need for several independent test instruments,
reducing the number of tools the technician must carry and learn to operate.
The LMR Master is a low-cost, easy-to-use, and rugged solution designed
specifically for field based technicians and engineers.
Rugged and Reliable
The Anritsu Handheld S412D is specifically designed for field
environments and can easily withstand the day-to-day punishment of
field use. The analyzer is almost impervious to the bumps and bangs typically
encountered by portable field-based equipment. The battery can be changed
without tools in seconds when necessary to help extend measurement time
in the field.
Transmissive Color Display
The standard transmissive color display is viewable in direct sunlight and at
wide viewing angles.
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The LMR Master is the only instrument you
need for complete LMR system maintenance
and trouble-shooting.
RS-232 Interface
Transfer stored data to and from a personal computer
(PC) via a serial cable for further analysis. Use PC to
automatically control and collect data in the field.
Snap-in field replaceable
battery location
Rugged and Reliable
Chassis Design
Ruggedized, lightweight,
compact, high-impact
housing is designed to
withstand repeated drops
and rough handling. Weather
resistant seals and rubber
membrane keypad protect
unit from dirt and moisture.
TFT Color Display
Standard TFT (640x480)
color display featuring variable
brightness control. Viewable
in direct sunlight.
External DC Power Port
Fun ct io n Keys
Four dedicated function keys
simplify measurement tasks.
and Power Meter Port
GPSSpectrum Analyzer
Soft Keys
Intuitive soft key
menu and user
interface.
Cable and Antenna
Analyzer Port
External Trigger and External
Frequency Reference In
Save and Recall Setup
Save 10 to 13 setups for fast
repeatable testing (mode dependent).
Marker
Six markers for more
comprehensive measurements.
Limit
Create simple pass/fail measurements
with a single limit line, upper
and/or lower mask limit lines.
Save and Recall Display
Up to 300 memory locations.
Alphanumeric data labeling and
automatic time/date stamp simplify
data management.
AM/FM Receiver
with Internal Speaker
Built-in AM/FM demodulator enables testing and
trouble-shooting of wireless communications
systems. An internal speaker and headphone
jack are included.
FunctionBenefits
Cable and Antenna Analyzer Quickly finds small, hard to identify faults before major failures occur.
Spectrum Analyzer Easily locate, identify and record various signals with incredible accuracy.
Power Meter Performs accurate power measurements, reducing holes and interference.
High Accuracy Power MeterPerform accurate RMS power measurements for both CW and modulated signals.
Channel ScannerMeasures frequency, bandwidth and power of multiple transmitted signals.
Transmission Measurement
Interference Analyzer
GPS Receiver Built-in receiver for location information.
P25 Signal Analyzer
P25 Talk-Out Coverage MeasurementsReceived Power and BER (1011 Hz pattern) along with GPS location and time.
iDEN Signal AnalyzerRF and demodulation measurements to monitor iDEN/WiDEN.
Variable Bias TeeEliminates the need for an external power supply when biasing tower mounted amplifier.
Built-in signal source to measure gain or loss of two port devices, as well as tower mounted
amplifier antenna isolation measurements and repeater testing.
Identify and locate interfering signals that cause dropped calls and coverage
problems. Intermittent problems can be identified using spectrograms.
RF measurements, demodulation and BER (1011 Hz pattern) help the technician to quickly check
LMR system performance.
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Cable and Antenna Analysis – Increase
System Uptime
The LMR Master cable and antenna analyzer uses Frequency Domain Reflectometry (FDR) to help technicians and
wireless field engineers detect cable, feedline and antenna system problems before they become costly, time-consuming
system failures. Superior immunity to ambient RF levels, and excellent directivity and source match ensure accurate and
repeatable measurements.
FDR Technique
Frequency Domain Reflectometry (FDR) and Time Domain Reflectometry (TDR) have similar acronyms, and both
techniques are used to test transmission lines. But, that’s where the similarities end. TDRs are not sensitive to RF problems:
the TDR stimulus is a DC pulse, not RF. Thus, TDRs are unable to detect system faults that often lead to system failures.
Additionally, FDR techniques save costly, time-consuming trouble shooting efforts by testing cable feedline and antenna
systems at their proper operating frequency.
Deficient connectors, lightning arrestors, cables, jumpers or antennas can be replaced before call quality is compromised.
Quick, Simple Measurements
LMR Master performs various RF measurements aimed at simplifying cable feedline and antenna system analysis: Return
Loss, SWR, Cable Loss and Distance-to-Fault (DTF). A single softkey selection on the main menu activates the desired
measurement mode.
Return Loss, SWR
Return Loss measures the signal energy that is “reflected” or returned back
to where it came from. VSWR (Voltage Standing Wave Ratio) is another
method to measure the reflections. Return Loss and SWR “system”
measurements ensure conformance to system performance engineering
specifications. Measurements can easily be toggled between the two modes
and can be performed without climbing the tower.
Cable Loss
Cable Loss measures the RF energy that is lost to heat and leakage as
the signal travels down the cable. Insertion loss can be verified prior to
deployment, when you have access to both ends of the cable, or on installed
cables with access to the opposite end.
The S412D LMR Master automatically calculates and displays the average
cable loss so there’s no more guess work or need for complicated calculations
in the field.
Distance-to-Fault
Although a Return Loss test can show users the magnitude of signal
reflections, it can not show the precise location of a fault within the cable
and antenna system. Distance-To-Fault measurements provide the clearest
indication of trouble areas as it shows both the magnitude of the signal
reflection and the location of the signal anomaly.
Distance-To-Fault can easily identify connector transitions, jumpers and
kinks in the cable and antenna system. Return Loss/SWR measurement data
is processed using Fast Fourier Transform and the resulting data indicates
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Return Loss/SWR versus distance.
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.
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.
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 measurement 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, measurement 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.
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