CES RM-20 Installation and Operation Manual
Model RM-20
Repeater Maker plus
CES Wireless Technologies Corp.
925-122 South Semoran Blvd., Winter Park, FL 32792
(407) 679-9440
support@ceswireless.com
www.ceswireless.com
MAN79 Version 1.2
Updated 31-Jan-10
Printed in USA
Table of Contents
INTRODUCTION........................................................................................................................................................................... 3
SPECIFICATIONS & FEATURES ............................................................................................................................................. 5
1.0 GENERAL DESCRIPTION .................................................................................................................................................. 6
2.0 INSTALLATION INSTRUCTIONS .................................................................................................................................... 7
2.1 GENERAL INFORMATION......................................................................................................................................................... 7
2.2 MATERIAL AND EQUIPMENT REQUIRED FOR INSTALLATION.................................................................................................7
2.3 MECHANICAL INSTALLATION................................................................................................................................................. 7
2.4 ELECTRICAL INSTALLATION................................................................................................................................................... 7
2.5 COMPONENT LAYOUT............................................................................................................................................................. 8
2.6 RADIO INTERFACE CONNECTION............................................................................................................................................ 8
2.7 INTERCONNECT INTERFACE PINOUT ......................................................................................................................................9
2.8 PROGRAMMING INTERFACE CONNECTOR PINOUT................................................................................................................. 9
2.9 JUMPERS.................................................................................................................................................................................. 9
2.10 RADIO AND AUXILIARY RELAY INTERFACE.J3- DB-15..................................................................................................... 10
2.11 INTERCONNECT INTERFACE J1-DB-9................................................................................................................................ 11
2.12 LEVEL ADJUSTMENTS......................................................................................................................................................... 12
3.0 PROGRAMMING PROCEDURES ...................................................................................................................................13
3.1 PROGRAMMING THE RM-20................................................................................................................................................. 13
3.2 PROGRAMMING TABLE SUMMARY.......................................................................................................................................14
4.2 CTCSS TONE TABLE............................................................................................................................................................ 19
4.3 MORSE CODE TABLE ............................................................................................................................................................ 19
4.0 USER CODE CHART............................................................................................................................................................20
5.0 CIRCUIT DIAGRAM........................................................................................................................................................... 21
6.0 AMENDMENTS.................................................................................................................................................................... 22
CES SUPPORT 407-679-9440 Page 2 MAN79 © CES 2009
Warranty
CES Wireless Technologies Corp. warrants this product to be free from defects in material and workmanship for
three years from date of shipment. If such malfunction occurs, it will be repaired or replaced (at our option) without
charge for materials or labor if returned to the factory. This warranty does not apply to parts damaged due to
improper use- including accident, neglect, unreasonable use, and improper installation - or to unauthorized
alterations or modifications of the equipment. It does not extend to damage incurred by natural causes such as
lightening, fire, floods, or other such catastrophes, nor to damage caused by environmental extremes, such as power
surges and or transients. It does not extend to microprocessors if is determined that the failure of a micro is due to
static damage, application of improper voltages to the unit, or other problems nor related to circuit design. In such
case or in the case of a desire to update the micro to a different version of software, such request must be specified
in writing, and there will be a charge agreed upon by both parties.
This product is warranted to meet published specification and to operate as specified only when properly installed in
radio equipment which complies with US FCC specification and the applicable radio manufacturer’s specifications.
CES is not responsible for any operational problems caused by system design, outside interference, or improper
installation. Installation and programming of this CES product must be completed by a qualified two-way radio
technician or engineer.
Equipment for repair may be returned to the factory, freight prepaid, only with prior authorization. Please call 407679-9440 for an RMA number. A brief letter describing the nature of the defect should be included with the
merchandise. Repair by other than CES will void this guarantee. In-warranty merchandise must be shipped, freight
prepaid, to CES. CES will return the repaired or replaced equipment to purchaser, within the United States.
This warranty applies to the original purchaser of the equipment only. CES is not liable under this warranty, or any
implied warranty, for loss of use or for other consequential loss or damage experienced by the purchaser. Some
states do not permit the exclusion or limitation of implied warranties or consequential damages. This warranty
provides special legal rights, and the purchaser may have other rights that vary from state to state.
Copyright
The information in this manual, and any software in this product remains the property of CES. Reproduction,
duplication, or disclosure is not permitted without the prior written consent of CES. CES reserves the right to
change products, specifications, and installations data at any time, without notice.
All information contained in this document is carefully prepared and offered in good faith as a guide in the
installation, operation, use and servicing of our products. Installers must insure that the final installation operates
satisfactory, within relevant regulatory requirements. We accept no responsibility for incorrect installation.
A CES PUBLICATION Copyright CES 1974-2010
Introduction
CES SUPPORT 407-679-9440 Page 3 MAN79 © CES 2009
Thank you for choosing the RM-20 Repeater maker plus.
This product has been carefully engineered and manufactured to provide reliable service in virtually any wireless
communications system. Occasionally, particular systems may require special functions not available in standard
products. Please call your CES Applications Engineer to discuss special applications to meet other needs.
Because we are engaged in a program of continual product development, the specifications and descriptions outlined
in this manual are subject to change. Please consult the amendment section for changes.
When you call CES for support, you will be asked for the version number of this manual. A manual is shipped free
with each RM-20. If you do not have a manual, we are unable to provide telephone support. Manuals can be
ordered from the CES Sales Department.
At CES, we strive to bring you products that meet your needs. If you have any comments about our products,
manuals or service please call CES at 407 -679-9440, and thank you for your continued support.
CES SUPPORT 407-679-9440 Page 4 MAN79 © CES 2009
SPECIFICATIONS & FEATURES
Features:
Rugged construction for harsh environments
Multi-user tone panel - up to 4 user groups
Cross-tone encoding supported
Programmed using DTMF telephone handset or over the air
Optional plug in voice delay module
Power and repeat inhibit switches
Auxiliary relay controlled via programmable DTMF code
Benefits:
Create a repeater using two transcievers
Provide a backup repeater for continious duty systems
Make a single/cross band repeater
Provide a “portable” repeater
Provide a multi user CTCSS repeater system
Specifications:
Dimensions: 4 x 4 x 1.5 inch.
Weight: 0.5 lb.
Cabinet: Aluminum Extrusion
Voltage: 12 V DC
Current Idle 30.7mA Transmit 90.00mA
Interface Cable: 6 ft shielded 9 conductor cable and RM-20 connectors provided
Potentiometers for level adjustments:
Receive Audio, Transmit Audio, CTCSS Output, Courtesy Beep, COR Threshold
Radio Interface Connections:
Power 5.5 - 18 V DC, reverse polarity protected
Ground To transceiver ground
PTT Relay Normally open, closed and common, connected to microphone PTT
Auxiliary relay Normally open, closed and common. For user application.
RX Audio Connected to discriminator or to squelched audio if transceiver has a suitable COR,
level adjustable.
TX Audio Normally connected to microphone audio, level adjustable.
COR Required only if RX Audio input is connected to squelched audio.
Interconnect Interface Connections:
PTT, RX Audio, Ground, TX Audio, COR and 12V
CES SUPPORT 407-679-9440 Page 5 MAN79 © CES 2009
1.0 General Description
This manual provides detailed information regarding the installation, operation, and maintenance of the
CES model RM-20 Repeater Maker plus.
The CES RM-20 is an advanced low cost, compact microprocessor controlled repeater controller unit that can make
a repeater out of just about any two transceivers. The standard features and versatility makes this an ideal choice for
commercial, industrial or amateur use.
The M-20 Repeater Maker plus includes:
Programmable Roger Beep
Programmable disconnect time out timer with disconnect warning beeps
Programmable hang time
Auxiliary relay controlled with programmable DTMF string
PTT relay
Power, COR and PTT LED’s
Power and repeat front panel switches
Repeat inhibit digital input with programmable polarity
Up to 4 programmable CTCSS encode/decode
Internal COR (discriminator)
External COR with programmable polarity
External interconnect DB-9 connector (pinout compatible with 4700VP Telephone Interconnect)
Programmable interconnect repeat audio function
Programmable Morse code ID
Internal 8 pin connector for 4700DB audio delay module
Local or over the air programming
Low current draw
CES SUPPORT 407-679-9440 Page 6 MAN79 © CES 2009
2.0 Installation Instructions
J2 Interconnect
J3 Radio Interface
2.1 General Information
Installation of the model RM-20 should be performed by a qualified two-way radio or communications technician.
Ensure that static precautions are observed and that power is not applied during installation.
Shielded audio cable should be used for all audio signal line connections to the transmitter-receiver combination.
Terminate ground shields at the DB9 connector only to prevent hum and noise due to ground loops. The shield at
the other end of the cable must be left unconnected. The best location for the units is as close as possible to the
transmitter-receiver combination, thus allowing the shielded cables and wires to be as short as possible.
2.2 Material and Equipment Required for Installation
The following items are needed in order to install the model RM-20:
#2 Phillips screwdriver
Solder and soldering iron
Service monitor or deviation meter (optional for transmitter deviation)
1/8” flat blade adjustment tool or jeweler’s screwdriver
Oscilloscope or RMS meter voltmeter
A DTMF telephone Handset
Digital Multimeter
Portable transceiver programmed with same frequencies as the receiver and transmitter interfaced with the
RM-20
2.3 Mechanical Installation
Place the RM-20 on any surface away from sources of extreme heat or cold. The RM-20 should be close to a good
grounding system if at all possible for maximum lightning protection.
2.4 Electrical Installation
Electrical installation of the model RM-20 involves connections to a radio receiver and transmitter via J3 (DB-15
male). An optional connector J2 (DB-9 female) is provided for the connection of a telephone interconnect such as
the CES model 4700VP. Figure 1 shows the rear panel of the RM-20. Table 1 shows functional information for
each pin of the DB-15 male on the rear panel. Table 2 shows functional information on each of the interconnect pins
of the (DB-9 female) connector. And Table 3 shows the RM-20 programming jack.
Fig. 1.0 RM-20 Rear Panel Diagram
J1
Prog
CES SUPPORT 407-679-9440 Page 7 MAN79 © CES 2009
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