W a t k i n s - J o h n s o n :
T h e
C e l l E x t e n d e r s
Repeaters
R820
4 Watt Cellular Repeater
CDMA,TDMA, AMPS
oles in your digital cellular network
can result in dropped calls, frustrated
subscribers, and lost revenue. Solve your
network coverage problems quickly and
easily with Watkins-Johnson's R820 cellular
repeater. The "over the air" repeater extends
base station coverage to shadow areas
caused by hills, large buildings, and other
structures that can obstruct cellular signals.
WJ repeaters can also be used as an efficient
and low cost alternative to base stations in
areas where coverage is more critical than
additional capacity. The R820 has a multi-
carrier high power output at a fraction of
the cost of a base station.
WJ R820 repeaters are band selective, so
they only amplify and extend coverage of
your frequencies. Small and easy to install,
the R820 repeater is designed for one person
installation. The WindowsTM compatible
software and remote interface allows control
of the gain and monitoring of the alarms.
The unit is housed in a rugged and weather
resilient NEMA4 enclosure.
s
Low Cost Base Station Alternative
s
Extends Cellular Coverage
s
High Output Power
s
Easy Installation
s
Low Cost
WJ W I R E L E S S C O M M U N I C ATI O N S P R O D U CTS
1-800-WJ1-4401
FAX: 650-813-2447
e-mail: wireless.info@wj.com
Windows is a registered trademark of Microsoft Corporation.
H
The Communications Edge
TM
Repeatr R820 Cellular DS 12/17/99 4:10 PM Page 1
R820
4 Watt Cellular Repeater
CDMA, TDMA, AMPS
W a t k i n s - J o h n s o n :
T h e
C e l l E x t e n d e r s
Repeaters
14.40
3.75
3.57
3.43
4X .188
8.40
15.90
ACCESS PANEL FOR AC/DC
CONTROL CONNECTIONS
2X CONDUIT FEED THRU
PIN 1
ALL DIMENSIONS IN INCHES
Specifications
Frequency Range
Amps band A or B
Output Power
4 Watts
Noise Figure
5 dB Typical @ max gain, 6 dB Typical @ min gain
Gain Range
55 dB to 85 dB
Gain Steps
2 dB
Signal Delay
5 sec.
RF Connectors
Type N
Power supply
110/220 VAC 50/60 Hz or +24 VDC Battery backup available
Alarms & Status
Synthesizers, Amplifiers, Power Amplifiers, Power Supply, Temperature,
Gain, Output power
Interface
RS-232 and modem
Control
Gain
Cooling
Convection
Temperature
Operating: -40 to +50 C Storage: -40 to +85 C
Weight
55 lbs
Weather Resistance
NEMA 4 rated, IP65
W A T K I N S - J O H N S O N C O M P A N Y
3 3 3 3 H i l l v i e w A v e n u e
P a l o A l t o , C A 9 4 3 0 4 - 12 2 3
O U T L I N E D R A W I N G
The Communications Edge
TM
Repeatr R820 Cellular DS 12/17/99 4:10 PM Page 2
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