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SECTION2
DESCRIPTION
2.1.0 DESCRIPTION
The R-2200 and R-2400 are test instruments designed
and manufactured by Motorola to perform the most
commonly used tests on radio communications equip-
ment. Rugged and portable, the Communications Serv-
ice Monitors are designed for technician productivity.
2.2.0 MICROPROCESSOR TECHNOLOGY
The R-2200 and R-2400 Communications Service Moni-
tors use advanced engineering design based upon a
Motorola M-6800 series microprocessor. The units fea-
ture liquid crystal displays (LCD) and a sealed mem-
brane keyboard for easy and accurate entry of data. The
LCD's show exactly what displays and functions are ac-
tive at any time. The displays change as you switch
monitor functions, and prevent you from selecting an
invalid readout.
2.3.0 MULTIPLE FUNCTIONS
The microprocessor design permits a wide variety of
service applications. The R-2200 is capable of perform-
ing tests which require:
Modulation Oscilloscope
"Off-the-Air" PL Counter
Multimode Code Synthesizer
ACIDC Digital Analog Voltmeter
General Purpose Oscilloscope
SINAD Meter
Distortion Meter
RF Wattmeter
as well as the traditional service monitor functions of
SIGNAL GENERATION, FREQUENCY ERROR and
MODULATION measurements.
In addition,
the
R-2400 provides a spectrum analyzer display while
simultaneously monitoring the received signal.
2.4.0 PORTABILITY
Weighing under 30 lbs. (13.6 kg), the unit's form factor is
engineered for ease of carrying. The optional internal
battery allows 1 hour continuous operation. Time is
saved since the technician has to transport less equip-
ment and does not have to take time to unpack, hook-up,
disconnect and repack additional equipment.
2.5.0 DURABILITY
The R-2200 and R-2400 are field environment tough and
meet the shock and vibration portions of EIA specifica-
tion RS152B. The units have been subjected to acceler-
ated life testing, during the design stage, to ensure the
best possible design and reliability. The Mylar covered
keyboard is sealed against moisture, dirt, dust and oil.
2-1
2.6.0 HUMAN ENGINEERING
The R-2200 and R-2400 are human engineered. The
membrane keyboard with audible feedback ensures ac-
curate data entry. Front panel controls are grouped by
function for simple operation. The microprocessor con-
trolled LCDs provide autoranging analog and digital
displays.
2.7.0 AM/FM SIGNAL GENERATOR
The built-in general purpose signal generator provides
continuous coverage of the HF, VHF, and UHF land
mobile spectrum for receiver testing. Many forms of
external and internal modulation can be simultaneously
impressed on the carrier signal for actual composite sig-
nals. The frequency range of the RF signal generator is
from 200KHz to 1 GHz in 100Hz steps. The output of up
to 1 VRMS provides sufficient amplitude to get through
misaligned tuners and receivers and is especially effec-
tive when changing a receiver's frequency. The high
level, calibrated output is available over the entire fre-
quency range of the Communications Service Monitor.
2.8.0 SINAD METERING
A comprehensive check of receiver performance can be
made with a SINAD measurement. The analog meter
bars and digital display of SIN AD appear automatically
whenever that measurement mode is selected. Hook-up
is simple with only two connections required and
measurements can then be accomplished without the
need for a separate signal generator, SINAD meter or
distortion analyzer.
2.9.0 DISTORTION METER
The distortion meter provides receiver or transmitter
audio stage quality measurement without a separate sig-
nal generator or distortion meter. It also provides higher
resolution than an oscilloscope to ensure the radio under
test meets all distortion specifications.
2.10.0 TERMINATED RF POWER MEASUREMENT
RF power is measured when the Communications Ser-
vice Monitor is in the power monitor mode. The built-in
RF load dissipates up to 125 watts. If a higher powered
transmitter should be keyed into the unit or if a lower
power transmitter is keyed into the unit for a prolonged
time threatening overheating of the power measuring
circuitry, the audible alarm sounds and the LCD's dis-
play changes to read "OVER POWER" or ·"OVER
TEMP", thus warning the technician to de-key. The in-
strument is further enhanced by the simultaneous indica-
tion of RF power output, carrier frequency error and
modulation, all at the same time.
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