Cable AML OAR02-010 Manual
Cable AML
Installation
and
Maintenance
Manual
Outdoor Active Repeater
Model: OAR02-010
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INSTALLATION AND
MAINTENANCE MANUAL
for
Outdoor Active Repeater
Model: OAR02-010
Cable AML, Inc.
2271 W 205th St STE 101
Torrance, California 90501-1449
USA
TEL (310) 222-5599 or (702) 363-5660
FAX (310) 222-5593
Copyright ©2006 Cable AML, Inc.
www.cableaml.com
IM456213-10 Rev – 20060623
Outdoor Broadband Repeater – Model: OAR02-010
IM456213-10 Rev – i
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Outdoor Broadband Repeater – Model: OAR02-010
IM456213-10 Rev – ii
TABLE OF CONTENTS
Section Page
1.0 INTRODUCTION...................................................................................................... 1
2.0 CIRCUIT DESCRIPTION.......................................................................................... 5
2.1 Low Noise Amplifier and AGC Circuit.............................................................................5
2.2 Power Amplifier..............................................................................................................5
2.3 Monitoring and Diagnostic Circuits.................................................................................6
2.4 Power Supply Circuits....................................................................................................6
3.0 INSTALLATION ....................................................................................................... 9
3.1 Unpacking ......................................................................................................................9
3.2 Input Voltage Requirements...........................................................................................9
3.3 Installation......................................................................................................................9
3.4 Connections ...................................................................................................................9
4.0 OPERATION.......................................................................................................... 12
4.1 Output Level Setting / Antenna Alignment ...................................................................12
4.2 Ambient Conditions......................................................................................................12
4.3 Thermal Sensor Switch................................................................................................12
5.0 MAINTENANCE AND TROUBLESHOOTING....................................................... 14
5.1 Maintenance.................................................................................................................14
5.2 External Troubleshooting .............................................................................................14
5.3 Internal Troubleshooting ..............................................................................................14
6.0 SPECIFICATIONS ................................................................................................. 16
Outdoor Broadband Repeater – Model: OAR02-010
IM456213-10 Rev – iii
LIST OF ILLUSTRATIONS
Figure Page
Figure 1. OAR02-010 Repeater.................................................................................... 2
Figure 2. OAR02-010 System Block Diagram. ........................................................... 3
Figure 3. OAR02-010 Repeater Chassis Layout......................................................... 7
Figure 4. OAR02-010 Mounted To Antenna Pole..................................................... 10
Figure 5. Connector Points On Bottom Panel of Unit............................................. 11
LIST OF TABLES
Figure Page
Table 1. Repeater Diagnostics Using The Cable AML DTB-1 Test Box................. 14
Outdoor Broadband Repeater – Model: OAR02-010
IM456313-05 Rev – 1
1.0 INTRODUCTION
The OAR02-010 repeater is a solid-state broadband multi-channel linear amplifier
designed to operate as an on-frequency repeater in the ITFS/MMDS/OFS frequency band
of 2.5 GHz to 2.686 GHz. The function of the repeater is to amplify a microwave input
signal for re-transmission at the same frequency but at higher power.
The repeater is comprised of a low noise pre-amplifier followed by a power amplifier, the
function of which is to amplify the signal to the maximum level consistent with the C/CTB
(Carrier to Composite Triple Beat) specification.
The per-channel output power of the unit decreases as the number of channels at the
input increases, so as to ensure that the output CTB distortion stays within specification.
This is accomplished by setting the AGC circuit to the correct value.
The power amplifier includes an output RF detector that serves an indicator of the total
average power output of the repeater. This amplifier is protected from failure by
overheating by an external temperature sensor. The sensor circuit automatically switches
off the amplifier input power when the amplifier temperature exceeds 158°F (70°C).
The repeater operates at 120/240 VAC, 50/60 Hz or 60 VAC. The microwave modules
are powered from a 12 volt 8.3 amp power supply.
To facilitate operational monitoring and diagnostics, the repeater has two internal
microwave-to-VHF downconverters, one connected to a sample of the repeater’s input
and to the output. The downconverted input and output signals can be continuously
monitored with a Field Strength Meter or a TV set without interruption of service.
The OAR02-010 transmitter consists of four assemblies (refer to Figure 2):
1. Input LNA and AGC Assembly - Input signal is band passed and fed to a Low
Noise Amplifier (LNA) with an internal microwave pin diode attenuator. It’s
purpose is to minimize the repeater noise figure (and thus obtain the best
Carrier to Noise Ratio) by providing enough gain to compensate for the losses
of circuit elements in front of the power amplifier. The Composite AGC Module
feeds the pin diode in the LNA. The purpose of the AGC is to maintain
constant average output power with varying channel loads or fades. The AGC
is implemented by a feedback loop comprised of an RF detector with an output
voltage proportional to the total average power at the repeater output. This
voltage is amplified in the Composite AGC module and then fed to the voltage
controlled pin attenuator in the LNA.
2. Power Amplifier - Input signal is amplified to a maximum level consistent with
the Carrier to Composite Triple Beat (C/CTB) specification by a state of the art
GaAs FET microwave power amplifier. The power amplifier is protected from
failure due to overheating by an external temperature sensor. The sensor
circuit automatically switches off the amplifier’s input power when the amplifier
temperature exceeds 158°F (70°C).
3. Monitoring and Diagnostic Circuits - The input and output signal can be
monitored via two ‘F’ connectors. The signals are downconverted to VHF thru
two internal downconverters. These VHF signals can then be measured with a
Field Strength Meter or a TV set. Diagnostic DC voltages can also be
continuously monitored via a 15-pin connector on the bottom of the repeater.
Outdoor Broadband Repeater – Model: OAR02-010
IM456313-05 Rev – 2
This connector is designed to interface with the "DTB-1" test box. If a standard
multi-meter is used instead of a committed test box a mating connector is
required. The U.S. Military part number for the required mating connector is
MS3116F14-15S. A commercial part number is (Bendix) PTO6F14-15S.
Contact Cable AML if further help is needed.
4. Power Supply Circuits – 120,240VAC or 60 VAC is applied to a 100 Watt,
auto ranging, AC to DC converter to produce the 12 Volts required by the
repeater circuits.
Complete specifications are listed in Section 6. Details of Installation, Operation, Circuit
Description, and Maintenance & Troubleshooting are described in Sections 2 through 5.
Figure 1. OAR02-010 Repeater.
Outdoor Broadband Repeater – Model: OAR02-010
IM456313-05 Rev – 3
P2
81101-001
65101-001
DIAGNOSTICS
REMOTE MONITOR
AGC
VOLTS
+12VDC
RF OUT
GND
K
D
N
F
L
M
B
C
H
G
RF IN
2500-2686 MHz
-50dBm/ch Nominal
POWER SUPPLY
12VDC @ 8.3 AMPS
BPF
AGC
RF OUT
2500-2686 MHz
31 CHANNELS
11.0 dBm/CH
10 dB
xx
LNA w/ ATTENUATOR
30 dB
XX
40 dB
GND
84311-006
6 dB PAD
431080-01
87158-001
87323-013 87102-210
87103-221
87336-002
POWER AMP
G=55 dB
87103-223 87102-230
84311-040
82003-022
83523-100
82000-005
Set for 15 dB of AGC
+12 VDC
--
POWER SUPPLY
24VDC @ 0.7 AMPS
83501-008
A82009-025
SURGE
PROTECTOR
AC HIGH
AC LOW
AC GND
120 or 240 VAC
3A Slo-Blo
B
C
84030-102
LINE IN
NEUTRAL IN
GND IN
LINE 1 OUT
LINE 2 OUT
NEUTRAL 1 OUT
NEUTRAL 1 OUT
GND OUT
24VDC TO DNC
AND F CONNECTOR
MMDS
DNC
87331-001
PWR
INSERT
87331-101 24VDC
INPUT
MONITOR
222 - 408 MHz
24VDC OUTPUT
MONITOR
222 - 408 MHz
RF
SAMPLE
RF INPUT
FERRITE OUT
+12 VDC TO POWER AMP
32 dB
MMDS
DNC
87331-001
PWR
INSERT
87331-101
THERMOSTAT
83601-005
ECN # REV DATE
SHEET OF
SCALE
DRAWING NO.
DATEAPPROVED BY:
REV.
SIZE
DATEDRAWN BY:
TITLE
COMPANY
CABLE AML, INC. Torrance, California, USA
1 1-
HCK 10-05-05
456213-10
OAR02-010 BLOCK DIAGRAM
-- --
Figure 2. OAR02-010 System Block Diagram.
Outdoor Broadband Repeater – Model: OAR02-010
IM456213-10 Rev – 4
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