Peninsula Engineering Solutions RMAS-120 User manual
Corporate Headquarters
1700 North Market Blvd, STE 101
Sacramento, California 95843 USA
Telephone: +1 916-928-6000
Facsimile: +1 916-928-6060
www.peninsulaengineering.com
RMAS-120 Alarm
For Microwave RF Repeater Systems
Operations Manual
550-0782-01
Revision F1
December 2021
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Revision F1, December 2021
© 2001 ~ 2021 Peninsula Engineering Solutions, Inc. All rights reserved.
The materials in this manual, the figures, tables and text, are the property of Peninsula
Engineering Solutions, Inc. Peninsula Engineering Solutions provides this manual to aid its
customers in obtaining product, ordering, installation, testing, maintenance, and application
information for this product. This information is confidential; any unauthorized duplication,
distribution, or electronic transfer of the materials to anyone other than Peninsula Engineering
Solutions authorized staff is forbidden.
By accepting this operations manual from Peninsula Engineering Solutions, you agree to hold, in
strictest confidence, and not to use or to disclose to any person, firm or corporation, without the
express written permission of Peninsula Engineering Solutions, the materials and information
herein. “Confidential Information” means any Peninsula Engineering Solutions proprietary
information, technical data, know-how, product plans, products, services, software, designs,
drawings, hardware configuration information, and tables featured in this manual.
The information contained in this manual is subject to change.
Peninsula Engineering Solutions, Microwave RF Repeater, and
SmartPower
are trademarks of
Peninsula Engineering Solutions, Inc. Other brands and their products are trademarks or
registered trademarks of their respective holders.
Document Change History
REV
DESCRIPTION
DATE
C
Convert from RTI to PESi documentation
October 2001
D
Add UHF Radio Link versions, general update
December 2014
E
Add transmitter only versions, general update
July 2016
F
Add SNMP versions, retire NETio UHF versions
July 2020
F1
Change PESi HQ address details
December 2021
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Website www.PeninsulaEngineering.com Email info@PeninsulaEngineering.com
Product Applications
Provides remote alarm and status monitoring for microwave RF Repeaters.
Compatible with all Peninsula Engineering Solutions microwave RF Repeaters.
Product Features
Provides a total of 31 alarm and monitoring points; 27 digital & 4 analog.
Can monitor general condition and RF output power of up to eight microwave amplifiers.
Has 7 digital inputs and 1 analog input allocated to user designation.
Has real time telemetry of battery plant voltage and cell temperature.
Retrofits with all Peninsula Engineering Solutions microwave Repeaters, except RF-1500 and
RF-2000 Repeaters produced by legacy companiesibefore 1994.
Complete site status is available locally at both the transmitter and receiver for further extension to
other supervisory equipment.
Standard telemetry transmission uses the very microwave signals being repeated.
Standard telemetry automatically combines two AGC (Automatic Gain Control) inputs, via the
diversity receiver interface, while canceling the noise.
Alternative telemetry transmission by out-of-band UHF radio link extends compatibility to all
microwave radio equipment types.
UHF radio links also support Ethernet at the RF repeater and alarm receiver station.
Alarm receivers can be adapted to SNMP over Ethernet.
The standard transmitter consumes only 66 mA at 12 VDC and is solar power compatible.
The receivers employ a wide input voltage power supply (21 VDC to 72 VDC).
The communication protocol is handed by industrial-graded microcontroller hardware on
board.
iCompanies include: Peninsula Engineering Group, Inc.; Peninsula Wireless Communications, Inc.;
and Repeater Technologies, Inc.
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iii Table of Contents
TABLE OF CONTENTS
PRODUCT APPLICATIONS.................................................................................................................................. I
PRODUCT FEATURES........................................................................................................................................ I
1INTRODUCTION AND SYSTEM OVERVIEW ..................................................................................................1
1.1 Using This Manual.......................................................................................................1
1.2 RMAS-120 Alarm System Reference Documents........................................................2
1.3 General Information.....................................................................................................2
1.4 Product Description.....................................................................................................3
1.5 Technical Summary.....................................................................................................5
1.5.1 General....................................................................................................................5
1.5.2 Standard Transmitter...............................................................................................5
1.5.3 SNMP, UHF Radio Extension, Transmitter subsystems, 900 MHz...........................6
1.5.4 Standard Receiver...................................................................................................7
1.5.5 Terminal Microwave Radio Requirements for AM data recovery..............................7
1.6 Ordering Information....................................................................................................8
2TECHNICAL DESCRIPTION....................................................................................................11
2.1 System Description....................................................................................................11
2.2 Standard Transmitter.................................................................................................12
2.3 Alarm Descriptions ....................................................................................................12
2.3.1 Transmitter Alarm LEDs.........................................................................................13
2.3.2 Standard Alarm Data Transmission .......................................................................13
2.4 Standard Receiver.....................................................................................................14
2.4.1 Standard Receiver Telemetry ................................................................................14
2.4.2 Standard Receiver Alarm Outputs .........................................................................16
2.4.3 Sync Loss Alarm....................................................................................................16
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3INSTALLATION INSTRUCTIONS STANDARD EQUIPMENT .........................................................17
3.0 General......................................................................................................................17
3.1 Inspection and Receipt of Unit...................................................................................17
3.2 Standard Receiver Assembly.....................................................................................17
3.2.1 Standard Receiver Connections ............................................................................23
3.3 Standard Transmitter Assembly.................................................................................24
3.3.1 Factory Installed Option.........................................................................................24
3.3.2 Field Installation.....................................................................................................24
3.3.3 Field Adjustments..................................................................................................27
3.3.4 Uncommitted Inputs...............................................................................................27
3.3.5 Waveguide Pressure Switch (Optional)..................................................................28
3.3.6 Battery Temperature Transducer...........................................................................29
3.3.7 RF Low Power Alarm Setting.................................................................................30
3.3.8 Amplifier modulation Setting ..................................................................................31
3.3.9 Opto-Coupler Strapping.........................................................................................33
3.3.10 User Interface....................................................................................................33
4MAINTENANCE AND TROUBLESHOOTING ..............................................................................35
4.1 Routine Maintenance.................................................................................................35
4.2 Troubleshooting.........................................................................................................35
4.2.1 Standard Transmitter Troubleshooting...................................................................35
4.2.2 Standard Receiver Troubleshooting.......................................................................36
4.3 Return Procedure......................................................................................................36
GLOSSARY.................................................................................................................................37
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LIST OF FIGURES
Figure 1.1 Location of the RMAS-120 transmitter in an RF Repeater.........................................4
Figure 2.1 RMAS-120 Standard Transmitter Block Diagram ....................................................12
Figure 2.2 Standard Receiver Block Diagram...........................................................................14
Figure 3.1 RMAS-120 Standard Receiver Module, Front and Back Views ...............................18
Figure 3.2 AGC Connection Diagram.......................................................................................19
Figure 3.3 Standard Receiver Alarm Outputs...........................................................................23
Figure 3.4 Standard Transmitter Assembly..............................................................................25
Figure 3.5 Standard Transmitter Assembly Front View ............................................................26
Figure 3.6 Tandem RF Repeater Configurations......................................................................32
LIST OF TABLES
Table 1, Reference Documents................................................................................................2
Table 1.A Alarm System Assemblies......................................................................................8
Table 1.B Spare Parts and Modules...........................................................................................8
Table 1.C Accessory and Modification Kits ................................................................................9
Table 2.A Alarm Monitoring Points...........................................................................................11
Table 3.A Standard Receiver Temperature Conversion...........................................................19
Table 3.B J1 Pin Number Assignments....................................................................................21
Table 3.C J2 Pin Number Assignments....................................................................................22
Table 3.D Battery Voltage Configuration..................................................................................27
Table 3.E Standard Transmitter Uncommitted Input Position Numbers....................................28
Table 3.F Standard Transmitter Temperature Conversion .......................................................29
Table 3.G RF Low Power Alarm Setting...................................................................................31
Table 3.H Standard Transmitter J2 Pin Number Descriptions ..................................................33
Table 3.I Standard Transmitter J3 Pin Number Descriptions....................................................34
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1 Chapter 1 Introduction and System Overview
1
INTRODUCTION AND SYSTEM OVERVIEW
1.1 Using This Manual
This manual is divided into four chapters. Personnel installing this equipment for
the first time should read each chapter. Personnel already familiar with this
equipment may begin with Chapter 3, Installation Instructions.
The chapters of this manual are organized as follows:
Chapter 1 Introduction and System Overview includes a general product
description, a functional description, technical specifications, and
ordering information.
Chapter 2 Technical Description explains the function and operation of the
RMAS-120.
Chapter 3 Installation Instructions outlines the procedures to install the
standard alarm equipment.
Chapter 4 Maintenance and Troubleshooting outlines the routine checks
required to maintain performance and address problems.
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2 Chapter 1 Introduction and System Overview
1.2 RMAS-120 Alarm System Reference Documents
Table 1, Reference Documents
Document
Application
520-0780-01 TDS RMAS-120 Receiver
Factory Test Data Sheet, Standard Alarm Receiver
520-0781-01 TDS RMAS-120 Transmitter
Factory Test Data Sheet, Standard Alarm Transmitter
520-0782-01 TDS RMAS-120 System
Factory Test Data Sheet, Standard Alarm System.
Stand-alone, not factory installed in RF repeater.
520-0782-2X TDS RMAS-120-2X System
Factory Test Data Sheet, SNMP Alarm System.
550-0782-01 RMAS-120 Operations Manual
This document, Standard Alarm System details
551-0782-21 Install Guide RMAS-120-2X
SNMP UHF radio link installation and setup details
552-0095-01 Orbit ECR 900 Operations Manual
Details on GE MDS Orbit ECR 900 radio transceiver
650-1020-01 RMAS-120 Trouble Shooting Guide
Details on correcting standard equipment problems
EAS-0782-01 RMAS-120 System
Schematic, external connections Std Tx + Std Rx -01
EAS-0782-21 SNMP UHF 1+0
Schematic wiring diagram Std Tx + SNMP UHF -21
EAS-0782-22 SNMP UHF 2+0
Schematic wiring diagram Std Tx + SNMP UHF -22
EAS-0782-23 SNMP UHF 3+0
Schematic wiring diagram Std Tx + SNMP UHF -23
EAS-0782-24 SNMP UHF 4+0
Schematic wiring diagram Std Tx + SNMP UHF -24
EAS-0782-26 SNMP ETH 1+0
Schematic wiring diagram Std Tx + SNMP -26
EAS-0782-27 SNMP ETH 2+0
Schematic wiring diagram Std Tx + SNMP -27
EAS-0782-28 SNMP ETH 3+0
Schematic wiring diagram Std Tx + SNMP -28
EAS-0782-29 SNMP ETH 4+0
Schematic wiring diagram Std Tx + SNMP -29
1.3 General Information
The Peninsula Engineering Solutions Microwave Repeater Monitor and
Alarm System, hereafter referred to as the RMAS-120, allows operators to
remotely monitor the status of Peninsula Engineering Solutions microwave
RF Repeaters. Remote monitoring improves the ability to maintain top
performance, minimize outages, and schedule routine maintenance for
equipment. In addition to alarm monitoring, the RMAS-120 alerts operators of
possible battery power failure several days in advance of the failure. The
RMAS-120 also reports key conditions such as amplifier status, battery voltage,
and temperature, and allows system operators to designate additional alarm
monitor points.
Both the transmitter and receiver modules of the RMAS-120 have LEDs (Light-
Emitting Diodes) for visual alarm indication and contact closures (opto-couplers).
The contact closures allow the operator to connect alarm information into a
standard supervisory system.
Standard RMAS-120 alarm equipment transports telemetry from the RF repeater
site by means of amplitude modulating the microwave carrier being repeated.
The microwave carrier is AM demodulated at the next microwave site by the
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3 Chapter 1 Introduction and System Overview
microwave radio AGC circuit. Recovered signals are decoded by the standard
RMAS-120 receiver.
Alternative telemetry transmission is available in the SNMP, UHF Ethernet radio
equipment configurations. Selected alarm points and telemetry measurements
are converted to SNMP messages on Ethernet. An out-of-band UHF radio data
link transports the SNMP messages from the RF repeater site to the adjacent
microwave radio site. Since the microwave path already requires line-of-sight, the
UHF radio link benefits from unobstructed propagation. The SNMP, UHF
Ethernet radio link configurations vary by the number and type of alarm points
and telemetry measurements supported plus the operating radio band. The
standard alarm transmitter module is always included in these UHF radio link
configurations, in order to provide the alarm points and telemetry channels. An
optional Ethernet switch may be added to allow additional Ethernet equipment at
the repeater site to be network accessible.
The standard receiver module has dual input for diversity microwave systems in
order to automatically adjust for the stronger input signal of diversity systems.
Alarm transmitter only versions are available for applications requiring local alarm
outputs at the repeater site only or for local conversion to SNMP followed by
network connection by local Ethernet or radio transport to network Ethernet
connection point.
1.4 Product Description
The standard RMAS-120 system consists of a set of transducers and sensors
which monitor the equipment, a standard transmitter module at the Repeater site
that generates the alarm data as a serial stream for modulating the microwave
carrier and local alarm point closures; and a standard receiver at the microwave
radio terminal site that decodes the data stream recovered from the microwave
signal.
The alternative RMAS-120 system includes the standard transmitter module,
SNMP modules, and UHF telemetry radio link equipment. Selected alarm point
closures and telemetry measurements generated in the standard transmitter are
converted to SNMP messages on Ethernet and transported by the UHF telemetry
radio to the network radio location.
The transmitter equipment is housed inside the weather protected microwave RF
Repeater cabinet. The indoor receiver equipment mounts in an EIA 19-inch rack.
See Figure 1.1 for a view of the RMAS-120 transmitter installed within a
Repeater cabinet. The RMAS-120 transmitter is located on the inside of the door.
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4 Chapter 1 Introduction and System Overview
Figure 1.1 Location of the RMAS-120 transmitter in an RF Repeater
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5 Chapter 1 Introduction and System Overview
1.5 Technical Summary
1.5.1 General
Serial Data Stream
Data Transfer Rate...............................34 bps, 68 baud (encoded)
Encoding ..............................................Manchester or Bi-Phase
Wave shaping ......................................Butterworth Response
Modulation............................................AM (Amplitude Modulation)*
*1 ±0.3 dB peak to peak, 6% depth of modulation.
Digital Alarm Points
Battery A Major (low voltage)
2 ~ 8 RF Low Power Alarms (F1 ~ F8)
Battery B Major (low voltage
2 ~ 8 Amplifier Major Alarms (A1 ~ A8)
Cabinet/Enclosure Door (open)
7 Uncommitted (User Defined Alarms)
Low Waveguide/Feedline Pressure
Analog Telemetry Transmitter Scale Receiver Output
Battery A Voltage 0 –30 VDC 3:1 0 –10 VDC
Battery B Voltage 0 –30 VDC 3:1 0 –10 VDC
Battery Plant Temperature 0 –5 VDC 1:2 0 –10 VDC
1 Uncommitted (User-Defined) Voltage 0 –30 VDC 3:1 0 –10 VDC
Voltage Telemetry
Accuracy...............................................+/-100 mV maximum
1.5.2 Standard Transmitter
Power Requirements
Voltage.................................................10.5 ~ 20 VDC, or 20.0 ~ 40 VDC, selectable
Current (12 VDC configuration)
LEDs OFF ............................................70 mA
All 21 LEDs ON,
activated upon manual switch .......166 mA
All LEDs momentarily ON and Strappable
Opto-Couplers ON.........................210 mA typical, 430 mA maximum
Alarm Outputs
27 Opto-Couplers.................................10 mA max current & 30 V max voltage, floating
Environmental
Temperature.........................................-40 to +60° C
Humidity ...............................................90%
Altitude .................................................15,000 feet (4600 meter) maximum
Mechanical: Dimensions and Weight
Height...................................................7.25 inches
Width....................................................10.5 inches
Depth....................................................3.7 inches
Weight..................................................2 pounds
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1.5.3 SNMP, UHF Radio Extension, Transmitter subsystems, 900 MHzii
Part Number
090-0783-21
090-0783-22
090-0783-23
090-0783-24
Radio Frequency
902~928 MHz
902~928 MHz
902~928 MHz
902~928 MHz
RF Transmit Power
+20 ~ +30 dBm
+20 ~ +30 dBm
+20 ~ +30 dBm
+20 ~ +30 dBm
RF Receive
Sensitivity,
1E-06 BER
-99 dBm
-99 dBm
-99 dBm
-99 dBm
Voltage options
12V nominal: +9 ~ +18 VDC,
24V nominal: +18 ~ +32 VDC
Max Currentiii
700 mA
750 mA
800 mA
800 mA
Avg Currentiii
600 mA
650 mA
700 mA
700 mA
Repeater Config
2 Amplifier
4 Amplifier
6 Amplifier
8 Amplifier
Digital Alarms
Points.
Closures.
Battery A Major
Battery B Major
Low RF Pwr F1
Low RF Pwr F2
AMPL A1 Major
AMPL A2 Major
Enclosure Door
W/G Pressure
Battery A Major
Battery B Major
Low RF Pwr F1
Low RF Pwr F2
Low RF Pwr F3
Low RF Pwr F4
AMPL A1 Major
AMPL A2 Major
AMPL A3 Major
AMPL A4 Major
Enclosure Door
W/G Pressure
U/C 1
U/C 2
U/C 3
U/C 4
Battery A Major
Battery B Major
Low RF Pwr F1
Low RF Pwr F2
Low RF Pwr F3
Low RF Pwr F4
Low RF Pwr F5
Low RF Pwr F6
AMPL A1 Major
AMPL A2 Major
AMPL A3 Major
AMPL A4 Major
AMPL A5 Major
AMPL A6 Major
Enclosure Door
W/G Pressure
U/C 1
U/C 2
U/C 3
U/C 4
U/C 5
U/C 6
U/C 7
Battery A Major
Battery B Major
Low RF Pwr F1
Low RF Pwr F2
Low RF Pwr F3
Low RF Pwr F4
Low RF Pwr F5
Low RF Pwr F6
Low RF Pwr F7
Low RF Pwr F8
AMPL A1 Major
AMPL A2 Major
AMPL A3 Major
AMPL A4 Major
AMPL A5 Major
AMPL A6 Major
AMPL A7 Major
AMPL A8 Major
Enclosure Door
W/G Pressure
U/C 1
U/C 2
U/C 3
U/C 4
U/C 5
U/C 6
U/C 7
Analog Telemetry
Battery A V
Battery B V
Temperature
Battery A V
Battery B V
Temperature
User Voltage
Battery A V
Battery B V
Temperature
User Voltage
Battery A V
Battery B V
Temperature
User Voltage
Ethernet Transport
10BASE-T Port, 250~500 kb/s rate, half-duplex.
UI Soft Provisioned.
Weight
7.5 pounds
8 pounds
8.5 pounds
8.5 pounds
ii Without Standard Transmitter Module 090-0781-01, -02, -03, -04
iii Current at +27 VDC; current increases as voltage decreases due to switching power supplies.
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1.5.4 Standard Receiver
Input Source.........................................Radio AGC (Automatic Gain Control) Voltage Output
AGC Loading........................................100 k Ohms, AC Coupled
AGC Sense ..........................................Balanced Differential Input
Alarm Outputs
27 Opto-Couplers.................................10 mA max current & 30 V max voltage, floating
Power Requirements
Voltage.................................................21 to 72 VDC (Positive or Negative ground)
Current .................................................300 mA maximum at 24 VDC
Environmental
Ambient Temperature ..........................0 to 60C
Humidity ...............................................90%
Altitude .................................................15,000 feet (4600 meter) maximum
Mechanical
Mounting...............................................19-inch Rack Mount Assembly (1 RU, 5” front projection)
Weight..................................................5 pounds
1.5.5 Terminal Microwave Radio Requirements for AM data recovery
For proper recovery of the standard amplitude modulated (AM) serial data, the terminal
microwave radio receiver must meet the following specifications:
AGC Voltage ........................................Test points or physical connection are required
AGC Arrangement................................Single ended with ground or balanced pair
AGC Sensitivity....................................20 mV minimum for 1 dB change in RSL
AGC Tracking.......................................1 dB/10 ms (100 dB/second) Fade Rate, minimum
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1.6 Ordering Information
The type of RMAS-120 to be ordered depends upon the configuration of
Repeaters which will be monitored. To order the RMAS-120, specify the proper
part numbers—see System accessories and modification kits are listed in Table
1.C.
Table 1.A. To order spare parts, specify the part and the part number of the
spare—see Table 1.B. System accessories and modification kits are listed in
Table 1.C.
Table 1.A Alarm System Assemblies
Part
Number
Application
Amplifiers
Telemetry
Transmission
900-0782-01
1+0 RF Repeaters
1 ~ 2
Std AM on MW CXR
900-0782-02
1+1/2+0 RF Repeaters
3 ~ 4
Std AM on MW CXR
900-0782-03
2+1/3+0 RF Repeaters
5 ~ 6
Std AM on MW CXR
900-0782-04
3+1/4+0 RF Repeaters
7 ~ 8
Std AM on MW CXR
900-0782-11
1+0 RF Repeaters, ALM Tx only
1 ~ 2
None –Local Alarms
900-0782-12
2+0 RF Repeaters, ALM Tx only
3 ~ 4
None –Local Alarms
900-0782-13
3+0 RF Repeaters, ALM Tx only
5 ~ 6
None –Local Alarms
900-0782-14
4+0 RF Repeaters, ALM Tx only
7 ~ 8
None –Local Alarms
900-0782-21
1+0 RF Repeaters
1 ~ 2
900 MHz UHF ETH Radio
900-0782-22
2+0 RF Repeaters
3 ~ 4
900 MHz UHF ETH Radio
900-0782-23
3+0 RF Repeaters
5 ~ 6
900 MHz UHF ETH Radio
900-0782-24
4+0 RF Repeaters
7 ~ 8
900 MHz UHF ETH Radio
900-0782-26
1+0 RF Repeaters, ALM Tx only
1 ~ 2
SNMP on Ethernet
900-0782-27
2+0 RF Repeaters, ALM Tx only
3 ~ 4
SNMP on Ethernet
900-0782-28
3+0 RF Repeaters, ALM Tx only
5 ~ 6
SNMP on Ethernet
900-0782-29
4+0 RF Repeaters, ALM Tx only
7 ~ 8
SNMP on Ethernet
Table 1.B Spare Parts and Modules
Part Number
Description
090-0780-01
Standard Receiver Unit, 1+0 ~ 3+1/4+0
090-0781-01
Standard Transmitter Unit, 1+0 ~ 3+1/4+0
090-0783-21
UHF 900M SNMP Radio Link Transmitter, 1 ~ 2 amplifier repeaters
090-0783-22
UHF 900M SNMP Radio Link Transmitter, 3 ~ 4 amplifier repeaters
090-0783-23
UHF 900M SNMP Radio Link Transmitter, 5 ~ 6 amplifier repeaters
090-0783-24
UHF 900M SNMP Radio Link Transmitter, 7 ~ 8 amplifier repeaters
090-0783-26
SNMP Ethernet Transmitter, 1 ~ 2 amplifier repeaters
090-0783-27
SNMP Ethernet Transmitter, 3 ~ 4 amplifier repeaters
090-0783-28
SNMP Ethernet Transmitter, 5 ~ 6 amplifier repeaters
090-0783-29
SNMP Ethernet Transmitter, 7 ~ 8 amplifier repeaters
034-0004-01
Pressure Switch Assembly, waveguide feedline, 1 PSI alarm (optional)
087-0021-04
Door Switch Assembly. N.O. when enclosure door is closed.
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9 Chapter 1 Introduction and System Overview
087-0444-01
Temperature Transducer Assembly, -40°C ~ +60°C
088-0352-01
Adapter Coaxial Cable, SMB Plug –BNC Jack (f)
088-0164-01
Adapter Cable, DB37 Plug(f) –20 Socket MR(f)
Table 1.C Accessory and Modification Kits
Part Number
Description
091-0700-01
Repair Kit, Miniature Rectangular (MR) Contacts
091-0782-01
Accessory Kit, RMAS-120, Standard
091-0782-20
Accessory Kit, RMAS-120, SNMP, UHF, ETH links
091-0783-01
Mod Kit, Ethernet Switch, RMAS-120 UHF Transmitter
091-0790-01
RMAS Alarm Extension Kit, adds 2nd 2 ~ 4 amplifier repeater
091-0800-01
UHF 900M Antenna Kit, Standard, medium 3/8” coax 250 Ft LG
091-0800-02
UHF 900M Antenna Kit, High Icing, medium 3/8” coax 250 Ft LG
091-0800-03
UHF 900M Antenna Kit, Standard, long 3/8” coax 500 Ft LG
091-0800-04
UHF 900M Antenna Kit, High Icing, long 3/8” coax 500 Ft LG
091-0800-06
UHF 900M Antenna Kit, Radome Yagi, medium 1/2” coax 250 Ft LG
091-0800-07
UHF 900M Antenna Kit, Exposed Yagi, medium 1/2” coax 250 Ft LG
Standard antenna kits include exposed element Yagi antennas.
High Icing antenna kits include radome enclosed Yagi antennas.
Orders should include a shipping destination and a billing address. Upon receipt
of an order, Peninsula Engineering Solutions sends an order acknowledgment
with a list of equipment ordered and the scheduled shipping date. Each shipment
also includes an equipment list.
Contact Peninsula Engineering Solutions’ corporate headquarters for sales
information or technical assistance for the RMAS-120, or any of our
communications’ or related products.
Corporate Headquarters
1700 N Market Blvd, STE 101
Sacramento, California 95834
United States of America
Tel: +1 916-928-6000
Fax: +1 916-928-6060
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2
TECHNICAL DESCRIPTION
2.1 System Description
The RMAS-120 consists of a transmitter and a receiver unit used to monitor
conditions at an RF Repeater site.
The standard RMAS-120 communicates data by means of telemetry signal
amplitude modulated on the microwave carrier signal passing through the RF
Repeater. This data stream is recovered at the receiver terminal site by
connecting the alarm receiver unit to the radio AGC output contacts. In order for
proper operation, microwave radios must meet sensitivity and tracking
specifications—see Section 1.5.5, Terminal Microwave Radio Requirements,
page 7.
The RMAS-120 data transmission rate is 34 bps, 68 baud with an amplitude
modulation of approximately 1 dB P-P. This slow data speed and low-level
modulation ensure that the RMAS-120 does not interfere with normal radio link
performance of virtually any type of analog or digital microwave radio such as
155 Mb/s OC-3 rate; in 64 QAM or 128QAM radio systems.
The alternative RMAS-120 system includes the standard transmitter module and
UHF telemetry radio link or SNMP Ethernet equipment. Selected alarm point
closures and telemetry measurements generated in the standard transmitter are
transported by the UHF telemetry radio to the receiver location. The UHF radios
operate in 900 MHz ISM band. This band is license free in USA, Canada and
many other countries but not all. See the UHF Installation Guides for more detail.
There are 21 possible alarm and monitoring points—see Table 2.A.
Table 2.A Alarm Monitoring Points
Analog Points
Battery A Voltage
Battery B Voltage
Battery Bank Temperature
Uncommitted Alarm
Digital Points
Battery A Major
Battery B Major
Amplifier Fault (up to 8)
RF Power Fault (up to 8)
Cabinet Door
Waveguide Pressure
Uncommitted Alarms (up to 7)
R
RM
MA
AS
S-
-1
12
20
0
A
Al
la
ar
rm
m
12 Chapter 2 Technical Description
When ordering the RMAS-120, the transmitter unit must be specifically ordered
for work with different microwave frequency and amplifier configurations. The
standard alarm receiver has dual inputs for diversity microwave systems which
allow it to automatically adjust to the stronger AGC input in such systems.
2.2 Standard Transmitter
The standard RMAS-120-01 transmitter is capable of monitoring up to 2
microwave repeater amplifiers. For diversity and multi-channel applications, the
transmitter unit can be ordered to provide status information for up to 8
amplifiers.
See Figure 2.1 for a block diagram of the transmitter.
LED
DISPLAY
USER
CHECK
SWITCH
VCC
27
4
ANALOG
OPTO
ISOLATOR
TO USER
MULTIPLEXER
DIGITAL
INTERFACE
20 Committed
7 Uncommitted
MC
68HC711
Microcontroller
FILTER
AMPLIFIER
BALANCED
OUTPUT
4
27
2
6
Figure 2.1 RMAS-120 Standard Transmitter Block Diagram
Amplifier status is monitored through the use of current comparator circuit.
Generally, when there is a problem in an amplifier, the current drain for the
amplifier will either increase or decrease. An alarm will activate if the current
drain on any one of the amplifiers is significantly different from normal.
2.3 Alarm Descriptions
The alarms reported by the RMAS-120 are as follows:
The RF low power alarm is generated by comparing the RF level of the
carrier with the field-adjustable reference point (normally 5 dB below
nominal level). The standard transmitter can monitor up to 2 microwave
carriers. The optional transmitters can monitor up to eight microwave
carriers.
The battery major alarm is generated if the A (or B) battery voltage drops
below 11.5 V (12 V battery) or 23.0V (24 V battery).
The cabinet door alarm is provided for security monitoring.
Other manuals for RMAS-120
1
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