GE MDS P-60 User manual

Reference Manual
05-2818A01, REV. C
AUGUST 2009
MDS P-60/P-60 HL
Packaged Radio System
Including Reference Material for Legacy
MDS P-50 Packaged Models
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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual i
TABLE OF CONTENTS
1.0 Introduction.................................................................................. 7
1.1 About This Manual ...........................................................................7
1.2 Equipment Description .....................................................................8
1.3 Accessories ....................................................................................11
2.0 MDS P-60 Installation................................................................12
2.1 Unpacking and Inspection ..............................................................12
2.2 Installation Considerations .............................................................12
2.3 Mounting the Enclosure .................................................................12
2.4 MDS P-60 Cable Connections .......................................................17
2.5 Audio and Keyline Connections—Analog Interface/Utility
Board (P/N 03-2110A01) ................................................................19
2.6 Data Connections—Digital Interface/
Utility Board (P/N 03-2472Axx) ......................................................23
2.7 Final MDS P-60 Installation Tasks .................................................25
3.0 MDS P-50 installation................................................................26
3.1 Unpacking and Inspection ..............................................................26
3.2 Installation Considerations .............................................................26
3.3 Mounting the Enclosure .................................................................26
3.4 MDS P-50 Cable Connections .......................................................31
3.5 Analog Interface/Utility Board Connections (P/N 03-1105A21) ......32
3.6 Digital Interface/Utility Board Connections
(P/N 03-1467A21) ..........................................................................36
3.7 Final MDS P-50 Installation Tasks .................................................38
4.0 P-60/P-50 Operation.................................................................. 39
4.1 Introduction ....................................................................................39
4.2 Initial Power-Up ..............................................................................39
4.3 Interface/Utility Board Features and Indicators ..............................42
5.0 Servicing Data ........................................................................... 47
5.1 Introduction ....................................................................................47
5.2 Preventive Maintenance .................................................................47
5.3 Fuse Replacement .........................................................................47
5.4 Backup Battery ...............................................................................48
5.5 System Troubleshooting ................................................................50
5.6 List of Replaceable Assemblies .....................................................51
5.7 Packaged System Adjustments—MDS P-60 .................................52
5.8 Service Drawings and Reference Data—
MDS P-60 ......................................................................................55
5.9 Packaged System Adjustments—MDS P-50 .................................64
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ii MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C
5.10 Order Wire Levels (Analog Interface/Utility Board
P/N 03-1105A21) ........................................................................... 65
5.11 Service Drawings and Reference Data—
MDS P-50 ......................................................................................66
Copyright Notice
This Installation and Operation Guide and all software described herein
are protected by Copyright: 2009 GE MDS, LLC. All rights reserved.
GE MDS reserves its right to correct any errors and omissions.
Operational Safety Notices
The radio equipment described in this guide emits radio frequency
energy. Although the power level is low, the concentrated energy from
a directional antenna may pose a health hazard. Do not allow people to
come in close proximity to the front of the antenna when the transmitter
is operating.
This manual is intended to guide a professional installer to install,
operate and perform basic system maintenance on the described radio.
ISO 9001 Registration
GE MDS’ adherence to this internationally accepted quality system
standard provides one of the strongest assurances of product and service
quality available.
GE MDS Quality Policy Statement
We, the employees of GE MDS, are committed to achieving total cus-
tomer satisfaction in everything we do.
Total Customer Satisfaction in:
• Conception, design, manufacture and marketing of our products.
• Services and support we provide to our internal and external
customers.
Total Customer Satisfaction Achieved Through:
• Processes that are well documented and minimize variations.
• Partnering with suppliers who are committed to providing quality and
service.
• Measuring our performance against customer expectations and
industry leaders.
• Commitment to continuous improvement and employee involvement.
RF Exposure
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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual iii
Notice
While every reasonable effort has been made to ensure the accuracy of
this manual, product improvements may result in minor differences
between the manual and the product shipped to you. If you have addi-
tional questions or need an exact specification for a product, please con-
tact our Customer Service Team using the information at the back of this
guide. In addition, manual updates can often be found on the GE MDS
Web site at www.gemds.com.
Environmental Information
The manufacture of this equipment has required the extraction and use
of natural resources. Improper disposal may contaminate the environ-
ment and present a health risk due to hazardous substances contained
within. To avoid dissemination of these substances into our environ-
ment, and to limit the demand on natural resources, we encourage you
to use the appropriate recycling systems for disposal. These systems will
reuse or recycle most of the materials found in this equipment in a sound
way. Please contact GE MDS or your supplier for more information on
the proper disposal of this equipment.
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iv MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C
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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 7
1.0 INTRODUCTION
1.1 About This Manual
This manual explains how to install and operate GE MDS packaged radio sys-
tems. It is a companion to the transceiver instruction manual that is shipped
with our packaged system units. After installation, we suggest that you keep
this manual with the transceiver manual for future reference.
This manual is arranged into five chapters:
•Chapter 1—Introduction
Tells how the manual is organized and describes the features and differ-
ences of the various packaged systems. You are in this section now.
•Chapter 2—MDS P-60 Installation
Provides the steps to mount the MDS P-60 and make the cable connec-
tions.
•Chapter 3—MDS P-50 Installation
Provides the steps to mount the MDS P-50 and make the cable connec-
tions.
•Chapter 4—Operation
Contains instructions for placing the units into normal service and
describes how to connect plug-in accessories such as a diagnostic ter-
minal and order wire handset.
•Chapter 5—Servicing Data
Presents adjustment procedures, assembly drawings and a list of
replaceable assemblies for the packaged systems. Also includes a sec-
tion on preventive maintenance and a troubleshooting chart to help
resolve system difficulties.
NOTE: Keep in mind that this manual is a system-level guide for the pack-
aged radio systems. Radio model numbers, and information about
specific radios, are not included in this manual un less there is an
exception to installation or operation. For specific radio information,
refer to the transceiver manual shipped with your unit.
GE MDS radios are designated by a model number, which indicates the radio’s
operating frequency, type (licensed or spread spectrum), and packaging. The
model number of an unpackaged, licensed 200 MHz radio is shown below as
an example.
Example:
Radios shipped as part of a P-60 or P-50 packaged radio system will have a
model number ending in -60 or -50.
Chassis configuration (10=no chassis)
7=Licensed narrow-band radio, 8=Unlicensed spread spectrum radio
Frequency band (usually) (for example, 2=200 MHz)
2 7 1 0
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8 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C
1.2 Equipment Description
GE MDS packaged systems include a radio transceiver, power supply (with
battery backup for AC-powered models) and Interface/Utility Board normally
mounted inside a weather resistant, padlockable enclosure. The only connec-
tions required are for primary power, antenna, and interface connection to the
customer-supplied equipment. All of these wiring connections are made within
the housing, leaving no connections exposed to weather.
The one-box design makes packaged systems well suited for outdoor
mounting, and for use in areas with limited space. Packaged systems are nor-
mally installed in wall-mount or pole-mount configurations, but an optional
plate is available for mounting the system in a 19 inch rack.
NOTE: Due to restricte d ventilation, the P-60 enclosure is not suitable for
applications employing a continuously-keyed radio, such as a master
station or repeater. Overhe ating may occur in these si tuations,
causing component failures in transceivers.
Enclosure Types
Figure 1 shows the two cabinet styles commonly used in the packaged system
family. Each is a gray fiberglass NEMA-approved enclosure.
•The MDSP-60 is a compact model measuring 13.75 inches high x
11.85 inches wide x 6.5 inches deep (35cm x 30.1cm x 16.5cm). This
model has less space inside for mounting of customer equipment, but is
ideal for use in locations where space is limited.
•The MDSP-50 is a discontinued model that is typically contained in a
large enclosure measuring 19.5 inches high x 17.5 inches wide x 9.5
inches deep (49.5cm x 44.5cm x 24.1cm). Extra space in the cabinet
may be used to mount customer-supplied equipment, if desired.
Invisible place holder
Figure 1. GE MDS Packaged Radio Systems
Shown with covers closed
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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 9
WARNING! P-60 units installed in a hazardous environment (P-60 HL)
require special installation procedur es in addition to the instructions
provided in this manual. Refer to and comply with P-60 HL Packaged
Radio - Hazardous Locations Installation Procedure (P000530) when
installing these units.
MDS P-60 Units Equipped with MDS iNET or TransNET
Transceivers
The P-60 can be equipped with various transceiver types. Depending on order
requirements, the enclosure might contain one of MDS’ newer generation
transceivers, such as an MDS iNET or MDS TransNET Series. These units are
housed in blue, die-cast aluminum enclosures and are mounted with brackets
that attach to the bottom of the radio and extend out the sides.
In addition to the standard TransNET radio, there is also a board-only version
of this product that can be installed in a P-60. While electrically and operation-
ally similar to the standard (metal-enclosed) TransNET, it does not have a full
enclosure. It is fitted with a non-metallic cover through which four mounting
screws are inserted to secure it to the P-60 plate.
These new generation transceivers are described below:
• The MDS iNET is a license-free IP/Ethernet transceiver measuring
1.50" high x 6.00" wide x 4.00" deep (3.8 x 15.2 x 10.2 cm). (Note:
Only three screws are used to mount MDS iNET models to the P-60
plate.)
• The MDS TransNET is a license-free serial data transceiver measuring
1.40" high x 5.30" wide x 3.50" deep (3.8 x 15.2 x 10.2 cm).
• The MDS TransNET 900 Board-Only transceiver is operationally sim-
ilar to the standard TransNET, but includes a non-metallic cover, and
measures 1.40" high x 5.30" wide x 3.50" deep (3.8 x 15.2 x 10.2 cm).
Figure 2. MDS iNET and TransNET Transceivers
Primary Power
Packaged systems can be equipped for a variety of AC or DC power supply
requirements. In addition, a 12 volt backup battery is provided as standard
equipment in AC-powered models. The battery provides at least four hours of
operation in the event of a primary power failure. (Depending on the transmit
duty cycle and how often the radio is polled, the battery may last much longer.)
The backup battery is float charged by the power supply during normal system
operation.
MDS TransNET
Transceiver
MDS TransNET
Board-Only Transceiver
MDS iNET IP/Ethernet
Transceiver
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10 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C
Programming and Diagnostics
Transceiver programming and diagnostics are performed by connecting an
MDS Hand-Held Terminal (HHT) or PC running MDS software. With MDS
P-60 models, an HHT can be plugged directly into the packaged system’s Inter-
face/Utility Board. This eliminates the need for unplugging the data cable from
the transceiver’s INTERFACE connector. Instructions for connecting a diag-
nostic terminal are given in Section 4.0 P-60/P-50 Operation on Page 39.
Packaged System Specifications*
* Specifications are subject to change without notice. For radio specifications, refer
to the associated transceiver instruction manual.
Enclosure Dimensions:
(excluding hardware) MDS P-60: 13.75 inches H x 11.85 inches W x 6.5 inches D
(35 x 30.1 x 16.5 cm)
MDS P-50:
19.5 inches H x 17.5 inches W x 9.5 inches D
(49.5 x 44.5 x 24.1 cm)
Approximate Weight:
(with backup battery) MDS P-60: 21 lb. (9.53 kg)
MDS P-50:
33 lb. (15 kg)
Enclosure Impact Resistance: Tested to 6.78 Joule (5 ft./lb.)
Transceiver types used in packaged systems: MDS x710 Series, MDS x810 Series, MDS
2300/4300/9300 Series, MDS iNET, MDS
TransNET, Mercury, and others
Temperature Range: Full performance: –30°C to +60°C
(Reduced battery life at cold temperatures)
Humidity: 95% at + 40°C Non-Condensing
Primary Power Options: 12, 24, 48, 120 Vdc
120–220 Vac
Typical Supply Current:
(Excluding battery-charging current) Transmit: 1.8 A @ 5 watts 1.0 A @ 1 watt
Receive: 80 mA maximum
Standby (transceiver in “sleep” mode): <15 mA
Backup Power Provision:
(Standard on AC-powered models.) 12 volt battery 4.6 Ah for P-60 series, 5 Ah for P-50 series
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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 11
1.3 Accessories
GE MDS publishes an Accessories Selection Guide which lists a complete
array of additional items available for use with this product. Please contact
your factory representative or visit www.GEmds.com to obtain a copy of this
guide.
Table 1. P-60 Accessories
GE MDS Part Number Description
12-1307A01 Order Wire Handset
02-1501A01 Hand-Held Terminal (Kit P/N 03-1501A01)
82-1982A02 Mounting plate for 19 inch rack; 10.5 inches
high (mounts internal chassis)
Table 2. P-50 Accessories
GE MDS Part Number Description
82-1743A01 Pole-Mount Adapters (two required)
12-1307A01 Order Wire Handset
02-1501A01 Hand-Held Terminal (Kit P/N 03-1501A01)
02-1556A01 Mountingkitfor19inchrack;15.75incheshigh
(mounts internal chassis)
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12 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C
2.0 MDS P-60 INSTALLATION
NOTE: Due to restricte d ventilation, the P-60 enclosure is not suitable for
applications using a continuously transmitting radio.
2.1 Unpacking and Inspection
After opening the shipping container, check the contents against the packing
list secured to the outside of the box. We recommend saving all shipping mate-
rials in case the unit needs to be shipped in the future.
The factory test data sheet is normally packed with the equipment. Check this
sheet to ensure that the packaged radio system has been configured to meet
your requirements. Specific items to check include: primary power voltage,
transmit and receive frequencies, modem speed (if applicable), FM deviation,
and transmitter RF power output. If there are discrepancies, contact GE MDS’
Customer Support at [phone] for assistance.
2.2 Installation Considerations
A short time spent planning the installation can help prevent performance
problems later on. Select a location that provides a stable mounting surface,
and also allows for convenient routing of the antenna, power and data cabling.
All of these cables (but especially the antenna feedline) need to be kept as short
as possible to minimize losses. Refer to the transceiver manual for a feedline
loss chart.
Packaged systems are normally mounted in either a wall-mount or pole-mount
configuration. If possible, install the unit in a location that can be easily
reached while standing on the ground. This allows convenient access for test
and servicing of the radio system.
If the unit must be installed in a location that is not easily accessible, it may be
desirable to first operate the packaged system on a test bench to verify proper
operation with customer-supplied equipment and to set any programmable
parameters before installation. However, installation tasks such as antenna
aiming and SWR checks should be done with the unit placed in its final oper-
ating position.
NOTE: The use of stainless steel mounting hardware is recommended for
outdoor installations.
2.3 Mounting the Enclosure
There are two basic mounting arrangements for the MDSP-60—pole mount or
wall mount. Methods for mounting the unit in both of these configurations
follow. When planning the installation, refer to Figure 3 on Page 13, which
shows the mounting dimensions of the MDS P-60 packaged system.
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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 13
Invisible place holder
Figure 3. MDS P-60 Mounting Dimensions
Wall Mounting Instructions
The steps below describe mounting of the MDS P-60 unit to a wall or other flat
surface. Ordinary lag screws (with flat washers) can be used for mounting to a
wooden surface. If it is to be mounted to a drywall, masonry or other
non-wooden surface, suitable fasteners will be required that can support the
weight of the unit.
To wall mount the unit, follow these instructions:
1. Attach the four keyhole mounting clips (provided) to the back of the
enclosure with 10-32 screws, as shown in Figure 4 on Page 14. The
screws must be no longer than 3/8" (9.5 mm). Longer screws will
damage the enclosure.
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14 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C
2. Hold the packaged unit up to the wall in the desired mounting position.
Have an assistant mark the four mounting holes with a pencil or marker.
(The marks should be placed in the center of the wide portion of the
mounting clips.)
3. Prepare the mounting surface for the fasteners to be used. (If using lag
screws, a small pilot hole at each mark will allow easier starting of the
screw.)
4. Insert the screws part way into the wall, leaving enough space to slide the
enclosure mounting clips onto the screws. Hang the packaged system
enclosure onto the four screws and tighten the screws securely. Do not
over-tighten.
Figure 4 shows a typical wall mount installation.
Figure 4. Typical Wall Mounted Installation (MDS P-60)
TO PRIMARY
POWER
(CONDUIT)
13.38"
34 cm
9.0"
22.86 cm
COAXIA CAB E
TO ANTENNA
TO DATA
EQUIPMENT
(RTU)
AG SCREW
ATTACHED TO BACK
OF MDS xx60A
ENC OSURE WITH
10-32 SCREW
(SEE TEXT)
F AT
WASHER
MOUNTING
C IP
MOUNTING CLIP DETAIL
(4 REQD)
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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 15
Pole Mounting Instructions
Standard pole mounting requires the use of two pole-mount adapters (P/N
82-1743A01). These brackets must first be bolted to the MDS P-60 enclosure.
The complete assembly can then be mounted to a wooden utility pole with two
lag screws or with two long bolts that extend through the pole. (Threaded rod
can also be used for through-the-pole mounting.) In either case, it is important
to use flat washers with the attaching hardware (fasteners are not supplied).
To pole mount the unit, follow these instructions:
1. Attach the two pole-mount adapter brackets to the MDS P-60
enclosure with four 10-32 screws, as shown in Figure 5. The screws
must be no longer than 3/8" (9.5 mm). Longer screws will damage
the enclosure.
2. With the help of an assistant, position the MDS P-60 enclosure on the pole
at the desired mounting point.
3. Install the attaching hardware (with flat washers) in the center hole of the
two brackets.
4. Tighten the fasteners securely, but do not over-tighten.
Figure 5 shows a typical pole-mount installation with lag screws.
Invisible place holder
Figure 5. Typical Pole-Mounted Installation (MDS P-60)
TO PRIMARY POWER
(CONDUIT)
COAXIA CAB E
TO ANTENNA
AG SCREW
F AT WASHER
(2 REQD)
TO DATA
EQUIPMENT
(RTU)
PO E MOUNT
BRACKET
82-1743A01
(2 REQD)
BRACKET ATTACHED
TO ENC OSURE
WITH 10-32 SCREWS
(SEE TEXT)
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16 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C
Other pole-mount hardware is available for the MDS P-60, including a
mounting bracket with a sun shield (for use in excessively hot climates), a
tower mounting bracket, and other arrangements to meet special needs. Con-
tact GE MDS for more information.
Rack Mount Alternative
In addition to wall and pole mounting, the packaged system can also be
mounted in a 19 inch equipment rack for indoor installations. Figure 6 shows
a typical rack mount installation using brackets fabricated from steel or alu-
minum. Figure 7 on Page 17 details the mounting plate configuration.
The electrical installation procedures given in this section apply fully to rack
mounted units. The physical mounting instructions, however, will differ,
depending on the type of rack cabinet to be used. Contact GE MDS if addi-
tional assistance is required.
Invisible place holder
Figure 6. Typical Rack Mount Installation (MDS P-60)
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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 17
2.4 MDS P-60 Cable Connections
This section describes the connection of external cabling to the MDS P-60
packaged system. Included are steps for connecting DC power, the station
antenna, and data equipment (RTU) cabling. Figure 7 shows an overall view of
the connection points for all external cabling. Subsequent illustrations will
show more detailed views of wiring connections as required.
Invisible place holder
Figure 7. MDS P-60 Cable Connection Points
Primary Power—TB2
The power input terminations for the MDS P-60 are provided on the Inter-
face/Utility Board connector TB2 via screw terminals (see Figure 8 on
Page 19). Note that TB2 is used for input power regardless of whether the unit
is configured for AC or DC operation. Primary power wiring should be routed
via conduit to the hole on the bottom right of the enclosure. This hole is fitted
with a standard 1-1/4" (3.37 cm) conduit coupling.
CAUTION: The MDS P-60 is available for operation on a wide variety
of AC or DC supply voltages. Be sure to check the label near TB2 and
make sure that the supply voltage you are using matches that specified
on the label before applying power. Use of an incorrect supply voltage
can permanently damage the radio, power supply, or both.
DC Operation
Connector TB2 is used for primary power input on DC-powered models. Pin 1
is the negative (–) connection. Pin 3 is the positive (+) connection.
BACK-UP BATTERY
CONNECTION (J4)
PRIMARY POWER
CONNECTION (TB2)
DATA EQUIPMENT
CONNECTION (TB1)
ANTENNA
CONNECTION
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18 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C
The MDS P-60 is normally wired by the factory for “floating” power connec-
tions. However, either of the primary power leads can be connected to TB2 Pin
2 (chassis ground), if desired, to configure the unit for positive or negative
ground.
AC Operation
Connector TB2 is used for primary power input on AC-powered models. Pins
1 and 3 are the AC line inputs. The AC Ground must be connected to Pin 2
(chassis ground).
AC power supplies are most commonly wired for 120 Vac, but can readily be
rewired for 230 Vac if desired. There is a chart on the side of the power supply;
unmount the power supply to view it.
Power Supply Bypass Plug
The MDS part number for the Power Supply Bypass plug (used on models
without a DC-DC converter) is 03-1304A01.
Accessory Power—With Analog Interface/Utility Board Installed
Interface terminal block TB1 Pin 12 can be used to provide up to 1 ampere for
13 Vdc negative ground accessories. TB1 Pin 11 is the negative connection.
Fuse F5 provides protection for this accessory power.
Backup Battery—Important information
Packaged systems supplied wired for AC operation have a backup battery
system installed as standard equipment. The battery is disconnected for ship-
ping by unplugging its cable from the Interface/Utility Board. This prevents
accidental discharge of the battery and radio operation while the unit is in ship-
ment or storage. Plug the battery cable into J4 to enable the backup power
option.
Antenna Connection
A type-N coaxial connector on the lower right side of the transceiver chassis
serves as the antenna connection to the packaged system. Route the antenna
coax through the weathertight bushing on the bottom of the enclosure and
attach it to the transceiver connector. This bushing is also commonly used to
pass the RTU interface through to the Interface/Utility Board. Do not tighten it
until all cabling has been installed.
The antenna connection is not made directly to MDS iNET and TransNET
transceivers, as with other MDS radios. A pigtail coaxial lead is provided (P/N
03-3576A01), that makes the antenna connection readily accessible, and con-
verts it from a TNC connector to a Type-N connector. After connecting the
antenna feedline to the pigtail connector, the assembly should be well insulated
(for example, electrical tape or shrink tubing) to prevent contact with other cir-
cuitry inside the P-60 housing.
Refer to the transceiver manual for additional information on installing
antennas and feedlines.
NOTE: The following subs ection describes audio and keyline connections
to an MDS P-60 Analog Interface/Utility Board (P/N 03-2110A01).
Instructions for the Digital Interface/Utility Board are given in the
next major subsection.
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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 19
2.5 Audio and Keyline Connections—Analog
Interface/Utility Board (P/N 03-2110A01)
The Analog Interface/Utility Board serves as the connection point for all audio
and keyline connections to the MDS P-60. Route the cabling to the Inter-
face/Utility Board through the weathertight bushing on the bottom of the
enclosure (also used for the antenna coaxial cable). Tighten the bushing after
installing the interface cable.
Interface/Utility Board connections are made through two compres-
sion-screw-type plug assemblies (see Figure 8). The plug assemblies are
removed by sliding the connectors away from the center of the PC board. There
is a pair of small clips on the plug that prevent the connectors from falling out
of the PCB mounted receptacles.
Invisible place holder
Figure 8. Plugs for Primary Power TB2
and Interface TB1 Connectors
Audio and Keyline—TB1
Connector TB1 on the Analog Interface/Utility Board is used for all audio and
keyline terminations. Table 3 lists the pin assignments for TB1. When making
connections, refer to Figure 9 on Page 20 for a detailed view of the Analog
Interface/Utility Board.
Table 3. Pin Connections (Analog Interface/Utility Board)
TB1
Pins Connection Remarks
1 & 2 Transmit Audio 600 , balanced
3 Ground
4 & 5 Receive Audio 600 , balanced
6 Ground
7 & 8 Keyline connection for positive or
negative keying This arrangement allows the radio to be keyed by a variety of different methods that will accommodate most systems.
For more information, see “Keyline Options” discussion
below.
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20 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C
Invisible place holder
Figure 9. Analog Interface/Utility Board, P/N 03-2110A01
Keyline Options
Several methods may be used to key the transceiver, depending on the facilities
available at the installation site and the design of the customer-supplied data
equipment. (See Figure 10 on Page 22.) This section discusses three common
keying methods. Contact the factory if further assistance is required.
Positive or Negative Keying
One keyline option is to use a keyed 12 to 25 volt source or a fixed voltage
source and a series relay. The relay contacts can be included in either the pos-
itive or negative supply lead. (See Figure 10 on Page 22, examples 1 and 2.)
The use of an opto-isolator allows both keying supply leads to “float” above or
below ground, and tolerates line to ground transients up to 2500 volts. TB1 Pin
7 must be positive with respect to TB1 Pin 8. For keying supply voltages higher
than 25 volts, add a resistor in series with the connection to TB1 Pin 7 or TB1
Pin 8 to limit the keying current to 10 to 20 mA.
9 AC Alarm Normally 11 Vdc; drops to zero volts if an AC failure occurs.
10 Received Signal Strength
Indication (RSSI) Approximately 0 to 5 Vdc through a 10K resistor.
8 & 11 Keyline connection when an
internal current source is used.
(Requires a jumper between Pins
7 and 12.)
This method uses the on-board 12 volt DC supply. For more
information, see “Keyline Options” discussion below.
12 +13 Vdc Accessory power (1 Amp maximum). Jumpered to Pin 7 for
keying with an internal current source. See description for
Pins 8 & 11 above.
Table 3. Pin Connections (Analog Interface/Utility Board) (Continued)
TB1
Pins Connection Remarks
INE 2/DC +
NEUTRA
INE 1/DC 
+13V ACCY
GND
RSSI
AC A ARM
KEY INE O
KEY INE HI
GND
RX AUDIO
RX AUDIO
GND
TX AUDIO
TX AUDIO
2
3
1
00-00000-00
POWER
CONNECTIONS
(TB2)
INTERFACE
CONNECTIONS
(TB1)
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
J5
J4
J7
F5
F4
F3
J3
J2
J6
J1
F1
F2
T2
T1
TB1 TB2
MOV1 MOV2
26 25
21
25
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