GE MDS P-60, MDS P-60 HL Reference 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 03-1 105A21)........................................................................... 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 cus­tomer 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 addi­tional questions or need an exact specification for a product, please con­tact 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 environ­ment and present a health risk due to hazardous substances contained
within. To avoid dissemination of these substances into our environ­ment, 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 sys­tems. 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 differ­ences 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 ter­minal 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 sec­tion 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 sys tems. 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 connec­tions 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 nor­mally 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 MDS P-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 MDS P-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 operation­ally 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 sim­ilar 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 Mounting kit for 19 inch rack; 15.75 inches high

(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 mate­rials 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 oper­ating 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 MDS P-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

COAXIAL CABLE

TO ANTENNA

TO DATA
EQUIPMENT
(RTU)

ATTACHED TO BACK

OF MDS xx60

A

ENCLOSURE WITH

10-32 SCREW

(SEE TEXT)

FLAT

WASHER

MOUNTING
CLIP

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)

COAXIAL CABLE
TO ANTENNA

LAG SCREW

FLAT WASHER

(2 REQD)

TO DATA
EQUIPMENT
(RTU)

POLE MOUNT
BRACKET
82-1743A01
(2 REQD)

BRACKET ATTACHED
TO ENCLOSURE
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. Con­tact 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 alu­minum. 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 addi­tional 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 connec­tions. 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 ship­ping by unplugging its cable from the Interface/Utility Board. This prevents
accidental discharge of the battery and radio operation while the unit is in ship­ment 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 con­verts 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 cir­cuitry 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 compres­sion-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 pos­itive 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

LINE 2/DC +

NEUTRAL

LINE 1/DC 

+13V ACCY

GND

RSSI

AC ALARM

KEYLINE LO

KEYLINE 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

2

1

25

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 21

Internal Current Source Keying

Another keyline option is to use the on-board 12 volt DC supply. This is done
by adding a jumper from TB1 Pin 7 to Pin 12. TB1 Pins 8 and 11 should then
be connected to the keyline relay contacts. (See Figure 10 on Page 22, example

3.)

Manual Keying Button (for test purposes)

A red pushbutton switch, SW1, is provided on the Interface/Utility Board to
key the transmitter manually when desired. This is intended for use during ini­tial setup and testing of the packaged system.

NOTE: The Transmit Test Key, SW1, on the Interface/Utility Board is

non-functional with MDS iNET or TransNET radios.

Additional Interface Connections

Two unique outputs are provided on TB1 for custom applications: AC power
failure alarm, and the transceiver’s Received Signal Strength Indication
(RSSI).

AC Alarm —Pin 9

H = AC Present—Approximately 11 Vdc through a 1 K
resistor

L = AC Failure—Ground through a 1 K resistor

Received Signal Strength Indicator (RSSI)—Pin 10

Same as transceiver’s RSSI output. It provides a DC voltage proportional to the
received signal strength. The range is approximately zero to five volts DC
through a 10K current limiting resistor. Refer to the transceiver manual for
additional RSSI information.

For MDS iNET and TransNET Radios

The Orderwire and Diagnostic connectors on the Interface/Utility Board are
not used when MDS iNET or TransNET radios are installed. Orderwire and
diagnostic connections must be made directly at the radio, using appropriately
wired connectors. Refer to the transceiver manual for pinout information.

The TransNET’s Sleep and Alarm lines are not carried onto the P-60 terminal
strip, J1/TB1. If these functions are required, make the connection directly at
the radio, using an appropriately wired connector.

Two interface cables are packed inside each P-60 when an MDS iNET or
TransNET radio is installed. The proper cable must be identified by the user
and installed between the radio’s DB-9 data connector and J2 on the Inter­face/Utility Board.

• The 03-2848A01 cable is for use with an iNET radio’s COM2 port.

• The 03-2876A01 cable is for use with either a TransNET radio, or an
iNET radio’s COM1 port.

P-60 units with an MDS iNET transceiver installed include an Ethernet Tran­sient Protector that is mounted at the bottom of the enclosure. A heavy ground
wire (green) extends between the stud on the protector, and the P-60’s ground
point.

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22 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

Invisible place holder

Figure 10. Keying Options, Analog Interface/Utility Board, P/N 03-2110A01

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 23

2.6 Data Connections—Digital Interface/
Utility Board (P/N 03-2472Axx)

The Digital Interface/Utility Board serves as the connection point for all data

connections to the MDS P-60. Route the cabling to the Interface/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 compres­sion-screw-type plug assemblies. 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.

RS-232/EIA-232 Data Connections—TB1

Table 4 lists the functions of the RS-232/EIA-232 pins on TB1 of the Digital

Interface/Utility Board. When making connections, refer to Figure 11 on

Page 24 for a detailed view of the Digital Interface/Utility Board.

*DSR wired to +8 V in the transceiver.

†

Not applicable for x710 or x810 radios, which are asynchronous

NOTES

1. The radio is configured as DCE (Data Circuit-terminating Equipment)
as opposed to DTE (Data Terminal Equipment).

2. These lines are inputs: ETC, TXD and RTS.

3. These lines are outputs: TC, RC, RXD, CTS, DSR and DCD.

4. For asynchronous operation, make no connection to Pins 8, 9 or 10.

Table 4. Interface/Utility Board TB1 Connections

Pin Number and Function

1. Signal & Protective Ground (usually pin 1)

2. Transmit Data In (TXD)

3. Received Data Out (RXD)

4. Request-To-Send (RTS)

5. Clear-To-Send (CTS)

6. Data Set Ready (DSR)*

7. Data Carrier Detect (DCD)

8. Transmit Clock (TC) Synchronous Operation Only

†

9. Receive Clock (RC) Synchronous Operation Only

†

10. External Transmit Clock (ETC) Synchronous Operation

Only

†

11. Received Signal Strength (RSSI)

12. AC Alarm (AC Failure)

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24 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

Additional Interface Connections

Two additional outputs are provided on TB1 for custom applications: AC
power failure alarm, and the transceiver’s Received Signal Strength Indication
(RSSI).

AC Alarm —Pin 12

H = AC Present—Approximately 11 Vdc through a 1 K
resistor

L = AC Failure—Ground through a 1 K resistor

Received Signal Strength Indicator (RSSI)—Pin 11

Same as transceiver’s RSSI output. It provides a DC voltage proportional to the
received signal strength. The range is approximately zero to five volts DC
through a 10K current limiting resistor. Refer to the transceiver manual for
additional RSSI information.

Invisible place holder

Figure 11. Digital Interface/Utility Board, P/N 03-2472Axx

00-00000-00

LINE 2/DC+

NEUTRAL

LINE 1/DC

AC ALARM

RSSI

ETC

RC

TC

DCD

DSR

CTS

RXD

TXD

GND

2

3

1

POWER
CONNECTIONS
(TB2)

INTERFACE
CONNECTIONS
(TB1)

RTS

1

2

3

4

5

6

7

8

9

12

10

11

1

2

3

J4

J7

F4

F3

F1

F2

J5

J1

J2

J6

J3

OUT

IN

SW2

26 25

21

2

TB1

TB2

MOV1 MOV2

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 25

2.7 Final MDS P-60 Installation Tasks

Perform the following steps to complete the installation of the MDS P-60 and

prepare the unit for normal operating service:

1. Dress and secure all external cabling in conformance with
applicable electrical codes.

2. Apply primary power to the unit and check for normal transceiver opera­tion. (Checks for the radio are described in the transceiver manual.)

3. If necessary, refine the antenna heading for maximum RSSI. Refer to the
transceiver manual for additional RSSI information.

4. Close and latch the equipment cabinet. The cabinet latch may be pad­locked if desired.

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26 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

3.0 MDS P-50 INSTALLATION

NOTE: The MDS P-50 is a discontinued pro duct, an d is pro vided in th is

manual for historical reference only.

3.1 Unpacking and Inspection

After opening the shipping container, check the contents against the packing
list secured to the outside of the box. We recommend that all shipping materials
be saved in case you need to ship the unit 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.

3.2 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 further
information on selecting feedlines.

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 final installation. However, installation tasks such as
antenna aiming and SWR checks should be done with the unit in its permanent
operating position.

NOTE: The use of stainless steel mounting hardware is recommended for

outdoor installations.

3.3 Mounting the Enclosure

There are two basic mounting arrangements for the MDS P-50—wall mount or

pole mount. The steps below describe methods for mounting the unit in both of
these standard configurations. When planning the installation, refer to

Figure 12 on Page 27, which shows the mounting dimensions of the MDS P-50

packaged system.

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 27

Invisible place holder

Figure 12. MDS P-50 Mounting Dimensions

Wall Mounting Instructions

The steps below describe mounting of the MDS P-50 unit to a wall or other flat

surface. Ordinary lag screws (with flat washers) can be used if the unit is to be
mounted 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. 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.

2. 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.)

3. Hold the packaged unit up to the wall again while an assistant installs the
four mounting screws. Make sure the screws are tightened securely, but do
not over-tighten.

Figure 13 on Page 28 shows a typical wall mount installation.

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28 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

Invisible place holder

Figure 13. Typical Wall Mount Installation (MDS P-50)

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-50 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-50

enclosure with suitable nut and bolt assemblies, as shown in

Figure 14 on Page 29.

2. With the help of an assistant, position the MDS P-50 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.

TO PRIMARY POWER
(CONDUIT)

COAXIAL CABLE

TO ANTENNA

LAG SCREW

FLAT WASHER

TO DATA EQUIPMENT (RTU)

(4 REQD)

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 29

Figure 14 shows a typical pole-mount installation using lag screws.

Invisible place holder

Figure 14. Typical Pole-Mounted Installation (MDS P-50)

Other pole-mount configurations are available for the MDS P-50, 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. Con­tact GE MDS for more information.

Rack Mount Alternative

In addition to wall and pole mounting, the internal chassis of the packaged
system can also be mounted in a standard 19 inch equipment rack for indoor
installations. The rack-mounted model is normally shipped without an enclo­sure and is supplied with hardware for mounting the chassis plate to the rack
cabinet. Figure 15 on Page 30 shows a typical rack mount installation, and

Figure 16 on Page 31 details the mounting plate configuration.

TO PRIMARY POWER

(CONDUIT)

COAXIAL CABLE
TO ANTENNA

LAG SCREW

FLAT WASHER

(2 REQD)

TO DATA
EQUIPMENT (RTU)

POLE MOUNT
BRACKET
82-1743A01
(2 REQD)

NUT & BOLT ASSEMBLY

(4 REQD)

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30 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

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 addi­tional assistance is required.

Invisible place holder

Figure 15. Typical Rack Mount Installation (MDS P-50)

POWER, DATA &
ANTENNA CABLING

PACKAGED SYSTEM
CHASSIS PLATE

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 31

3.4 MDS P-50 Cable Connections

This section describes the connection of external cabling to the MDS P-50

packaged system. Included are steps for connecting DC power, the station
antenna, and the customer-supplied equipment. Figure 16 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 16. MDS P-50 Cable Connection Points

Primary Power—J3

The power input terminations for the MDS P-50 are provided on the Inter-

face/Utility Board connector J3. Note that J3 is used for input power regardless
of whether the unit has been configured for AC or DC operation. Primary
power wiring should be routed via conduit to the rear hole on the bottom of the
enclosure. This hole is fitted with a standard 1-1/4" (3.37 cm) conduit coupling.

CAUTION:

The MDS P-50 is available for operation on a wide variety
of AC or DC supply volta ges. Be sure to check the label near J3 and
make sure that the supply voltage you are using matches that specified
on the label before applying power. The use of an incorrect supply volt­age can permanently damage the radio, power supply, or both.

DC Input—J3

Connector J3 is used for primary power input on DC-powered models. Pin 1 is
the positive (+) connection. Pin 3 is the negative (–) connection.

The system can be configured for negative or positive chassis ground by con­necting either the negative or positive supply lead to J3 Pin 2 (chassis ground
terminal). As an alternative, the DC supply leads can be left “floating” by
making no connection to J3 Pin 2.

AC Input—J3

Connector J3 is used for primary power input on AC-powered models. J3 Pins
1 and 3 are the AC line inputs. The AC Ground must be connected to J3 Pin 2
(chassis ground terminal).

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32 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

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.

Accessory DC Power Out—J8

Accessory Power connector J8 on the Interface/Utility Board can be used to
provide up to 2 amperes at 13 Vdc negative ground for accessories. Fuse F2
provides over-current protection for this power.

Pin 1 of J8 is connected to the +13 volt DC supply. Pin 2 is at DC ground.

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 ship­ping by unplugging its cable from the Interface/Utility Board. This prevents
accidental discharge of the battery and radio operation while the unit is in ship­ment 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 front hole (a 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 cabling through to the Interface/Utility
Board. Do not tighten it until all cabling has been installed.

Refer to the transceiver manual for additional information on selecting and
installing antennas and feedlines.

NOTE: The following subs ection describes audio and keyline connections

to an MDS P-50 Analog Interface/Utility Board (P/N 03-1105A21).
Instructions for the Digital Interface/Utility Board are given in the

next major subsection.

3.5 Analog Interface/Utility Board Connections

(P/N 03-1105A21)

The Analog Interface/Utility Board serves as the connection point for all audio

and keyline connections to the MDS P-50. 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.

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 33

Connector J1 on the Analog Interface Utility Board is used for all audio and
keyline terminations. Refer to Table 5 for a summary of J1 pin connections.

Figure 17 shows a detailed view of the Analog Interface/Utility Board.

Figure 17. Analog Interface/Utility Board Connections—MDS P-50

Table 5. J1 Pin Connections (Analog Interface/Utility Board)

J1
PINS

CONNECTION REMARKS

1 & 2 Transmit Audio 600 , balanced
3 No Connection
4 & 5 Receive Audio 600 , balanced
6 No Connection
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.

See “Keyline

Options” on Page 34.

8 & 11 Keyline connection when an internal current

source is used. (Requires a jumper between
Pins 7 and 10.)

This method uses the on-board 12 volt DC
supply.

See “Keyline Options” on Page 34.

9 AC Failure Alarm Normally 11 Vdc; drops to zero volts if an AC

failure occurs.

10 +13 Vdc Accessory power (2 Amp maximum) jumpered

to Pin 7 for keying with an internal current
source. See description for Pins 8 & 11 above.

11 PCB ground connection Connects to ground on the Interface/Utility

Board.

12 Received Signal Strength Indication (RSSI) Approximately 0 to 5 Vdc through a 10K

resistor.

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34 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

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 18 on Page 35.) This section discusses three common
keying methods. Contact the factory if additional 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 series relay. The relay contacts can be included in either the positive
or negative supply lead (see Figure 18 on Page 35, examples 1 and 2). The use
of an opto-isolator allows both keying supply leads to “float” above or below
ground. J1 Pin 7 must be positive with respect to J1 Pin 8. For keying supply
voltages higher than 25 volts, add a resistor in series with the connection to J1
Pin 7 (or Pin 8) to limit the keying current to 10 to 20 mA.

Internal Current Source Keying

Another keyline option is to use the on-board 12 volt DC supply. This is done
by adding a jumper from J1 Pin 7 to Pin 10. J1 Pins 8 and 11 are then connected
to the keyline relay contacts (see Figure 18 on Page 35, example 3).

Manual Keying Button (for test purposes)

A red pushbutton, SW1, is provided on the Interface/Utility Board to key the
transmitter manually when desired. This is useful during initial setup and
testing of the packaged system.

Additional Interface Connections

Two additional outputs are provided on J1 for custom applications: AC power
failure alarm, and the transceiver’s Received Signal Strength Indication
(RSSI).

AC FAIL—Pin 9

H = AC Present—Approximately 11 Vdc through a 1 K
resistor

L = AC Failure—Ground through a 1 K resistor

RSSI—Pin 12

Same as transceiver’s RSSI output. Provides a DC voltage pro­portional to the received signal strength. Range is approximately
zero to five volts DC through a 10K current limiting resistor.
Refer to the transceiver manual for additional RSSI information.

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 35

Figure 18. Keying Options—Analog Interface/Utility Board, P/N 03-1105A21

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36 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

3.6 Digital Interface/Utility Board Connections

(P/N 03-1467A21)

The Digital Interface/Utility Board serves as the connection point for all data
interface cabling to the MDS P-50. Route the cabling to the Interface/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.

Connector J1 on the Digital Interface/Utility Board is used for all data cabling
terminations. Refer to Table 6 for a summary of the required pin connections.

Figure 19 on Page 37 shows a detailed view of the Digital Interface/Utility

Board.

*DSR wired to +8 V in the transceiver.

†

Not applicable for x710 or x810 radios, which are asynchronous

NOTES

1. The radio is configured as DCE (Data Communications Equipment) as opposed to
DTE (Data Terminal Equipment).

2. These lines are inputs: ETC, TXD and RTS.

3. These lines are outputs: TC, RC, RXD, CTS, DSR and DCD.

4. For asynchronous operation, make no connection to Pins 8, 9 or 10.

Table 6. Interface/Utility Board J1 Connections

Pin Number & Description Pin Number & Description

1. Signal & Protective Ground 7. Data Carrier Detect (DCD)

2. Transmit Data In (TXD) 8. Transmit Clock (TC)

Synchronous Operation Only

†

3. Received Data Out (RXD) 9. Receive Clock (RC)

Synchronous Operation Only

†

4. Request-To-Send (RTS) 10. External Transmit Clock (ETC)

Synchronous Operation Only

†

5. Clear-To-Send (CTS) 11. Received Signal Strength
(RSSI)

6. Data Set Ready (DSR)* 12. AC Failure (Alarm)

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 37

Invisible place holder

Figure 19. Digital Interface/Utility Board Connections—MDS P-50

Additional Interface Connections

Two additional outputs are provided on J1 for custom applications: AC power
failure alarm, and the transceiver’s Received Signal Strength Indication
(RSSI).

AC FAIL—Pin 12

H = AC Present—Approximately 11 Vdc through a 1 K
resistor

L = AC Failure—Ground through a 1 K resistor

SGN-STRENGTH (RSSI)—Pin 11

Same as transceiver’s RSSI output. Provides a DC voltage pro­portional to the received signal strength. Range is approximately
zero to five volts DC through a 10K resistor. Refer to the trans­ceiver manual for additional RSSI information.

+
–

BATTERY

PACK

RED

BLACK

FUSE

DIGITAL
INTERFACE
ASSEMBLY

SYSTEM
GROUNDSTUD

DATA
INTERFACE

PRIMARY

POWER

ANTENNA

TRANSMISSION LINE

POWER
SUPPLY

J7

J4

1

1

J8

1

F2

J2

1

J1

1

J6

J5+–

F1

MOV1 MOV2

J3

1

3

46

+

+

+

+

J10

+

J9

PRIMARY POWER
INPUT (AC or DC as
indicated on c hassis
label.)

+–

13 VDC

+

–

RS-232

INTERFACE

CONNECTOR

J1

25 26

2

CHASSIS
GROUND

+–

2345 678910 11 12

12345 678910

T

R

A

N

S

C

E

I

V

E

R

E

T

C

R

C

T

C

D

C

D

D

S

R

C

T

S

R

T

S

R

X

D

T

X

D

G

N

D

A

C

F

A

I

L

S

G

N

S

T

R

E

N

G

T

H

RESERVED FOR RS-422
(CONSULT FACTORY)

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38 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

3.7 Final MDS P-50 Installation Tasks

Perform the following steps to complete the installation of the MDS P-50 and

prepare the unit for normal operating service:

1. Dress and secure all external cabling in conformance with
applicable electrical codes.

2. Apply primary power to the unit and check for normal transceiver opera­tion. (Checks for the radio are described in the transceiver manual.)

3. Close and latch the equipment cabinet. The cabinet latches may be pad­locked if desired.

4. If necessary, refine the antenna heading for maximum RSSI. (Refer to the
transceiver manual for additional RSSI information.)

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 39

4.0 P-60/P-50 OPERATION

4.1 Introduction

The packaged systems are designed for unattended field operation. The only
normal operator interaction is to apply power at the time of installation and
observe the unit for proper LED indications. This chapter discusses the steps
for initial power-up and also describes the connection of accessory equipment
to the packaged system. These instructions assume that the unit has been
installed in accordance with the installation procedures given earlier in this
manual.

4.2 Initial Power-Up

As soon as primary power is applied to the packaged system, the unit is ready
for operation. Follow these steps to begin operation:

1. Apply primary power to the packaged system.

2. Observe for normal operation. Typically, the radio will be transmitting
intermittently in response to polling signals from the master station. The
transceiver instruction manual describes other installation checks that can
be made to the radio and antenna system.

Battery Backup Operation—for AC-powered units

In AC-powered units, a 12 volt battery is provided as standard equipment. The
battery provides at least four hours of continued 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 battery is float charged
by the power supply during normal operation.

During battery backup operation, an

AC FAIL LED illuminates on the Inter-

face/Utility Board. (On DC-powered units, this LED will be lit continuously
under normal conditions.) A test procedure for the backup battery is given in

Backup Battery Testing on page 48.

NOTE: Packaged systems supplied wired for AC operation have a backup

battery system installed as stan dard eq uipment. The ba ttery is
disconnected for shipping by un plugging its cable from the Inter­face/Utility Board. This prevents accidental discharge of the battery
and radio operation while the unit is in shipment or storage. Plug the
battery cable into J4 to enable the backup power option.

Low Voltage Disconnect Assembly

A Low Voltage Disconnect Assembly (P/N 03-3077A01) is included in many
recently manufactured packaged radio systems. This section explains the oper­ation of the assembly and provides schematic and component location infor­mation.

A field upgrade kit (P/N 03-3077A11) is also available to add the Low Voltage
Disconnect Assembly to older packaged radio units. Contact GE MDS for
additional information.

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40 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

Functional Description

The Low Voltage Disconnect assembly is a small PC board mounted on the
chassis plate of GE MDS packaged model radio systems. It prevents battery
damage that may be caused by allowing a backup battery to drop below 10.2
volts while powering a transceiver, such as might occur during a lengthy power
outage. Component locations are shown in Figure 20, and Figure 21 provides
a schematic diagram.

When the battery voltage drops to 10.2 Volts (± 0.2V), the Low Voltage Dis­connect Assembly automatically disconnects the battery from the transceiver.
This, of course, stops operation of the radio, but protects the battery from
potential damage. When AC power returns, the battery is automatically con­nected to the power supply (for charging) and normal radio operation resumes
immediately.

Invisible place holder

Figure 20. Low Voltage Disconnect Assembly, P/N 03-3077A01

Component Locations

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 41

Invisible place holder

Figure 21. Low Voltage Disconnect Assembly, P/N 03-3077A01

Schematic Diagram

Use of the Battery Reset Switch (SW1)

Normally, the operation of the Low Voltage Disconnect Assembly is fully
automatic. The only exception is when replacing a discharged battery with a

charged unit before AC power has returned. In this case, it is necessary to press

the

BAT. RESET switch on the assembly after installing the new battery. (See

Figure 22.) Use a pen or other pointed object to press the switch. This allows

the replacement battery to immediately supply power to the transceiver.

Invisible place holder

Figure 22. Low Voltage Disconnect Assembly

NOTE: For proper opera tion of the Low V oltage Disconnect assembly,

14.10 Vdc (±0.1 V) must be present at the battery connector on the
Interface/Utility Board (with the battery disconnected). This is the
standard factory setting.

U

MC33172

-

3

1

2

U

MC33172

-

6

7

5

U
MC33172

+

-

4

8

K1

+-

3

6

4

1

J1

1

2

3

E1+

E2

E1

GN

SW

0.1UF

C

10UF

C

1

121K

R

1

110K

R

10K

R

10K

R

100

R

1ME

R

MMBT3904L T1

Q

2

3

1

1N5231

CR

1

3

2

CR

1

3

2

CR

132

RESE

BATTER

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42 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

Operational Test

To test for proper backup battery operation, proceed as follows:

1. Apply AC power to the packaged system and operate the radio in
the normal manner.

2. When the battery has charged, disconnect the AC power and verify that the
system continues to operate on battery power.

3. Re-apply AC power. This completes the checkout procedure.

4.3 Interface/Utility Board Features and Indicators

Most user interaction with the packaged system takes place at the Inter­face/Utility Board located in the lower left hand side of the enclosure.
Depending on the model of the unit, a variety of features are available on this
board that will assist you in monitoring and controlling the operation of the
system. Table 7 on page 42 contains a summary of the available features and
indicators on each packaged model.

Invisible place holder

Table 7. Interface/Utility Board Features & Indicators

Model
Configuration

Order
Wire

Jack

1

HHT Jack

LED
Indicator(s)

Test
Switch

1

Adjustments

2

MDS P-60
w/Analog
Interface/Utility
Board

J1
(Modular)

J3 (Modular) CR6—AC

power failure
indicator. (On
with battery
operation.)

CR10—
Transmitter
keyed

SW1—Red
button.
Used to
manually
key the
transceiver.

R9—TX audio
level

R10—RX audio
level

R28—Order wire
deviation

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 43

Connecting an Order Wire Handset
NOTE: Order wire (voice) operation over data frequencies is not permitted

in all countries. Check the regula tions before connecting an Order
Wire handset to your system.

The radio equipment installed in the packaged system is normally used for data
(non-voice) transmission. Occasionally, however, it may be desirable to estab­lish a temporary voice link to personnel at the master station to coordinate
installation or maintenance activities. This is accomplished with an “Order
Wire” connection.

Many packaged system Interface/Utility Boards have a modular tele­phone-style jack that will accept an Order Wire handset (see Figure 23).

Table 7 on page 42 shows the appropriate jack number to use for each pack-

aged system model. Although many standard telephone handsets can be used
for Order Wire service, GE MDS offers a unit specifically intended for use
with its transceivers (P/N 12-1307A01). The Order Wire facility is not avail­able on units equipped with an MDS 9000 Series Transceiver.

To use the Order Wire feature:

1. Plug the Order Wire handset into the modular jack on the
Interface/Utility Board. (See Table 7 on page 42 for the appropriate
jack number.)

2. Key the transmitter by speaking into the handset (VOX).

MDS P-60
w/Digital
Interface/Utility
Board

J1
(Modular)

J3 (Modular)

or

DB-25
connector

(SW2 used to
switch these
jacks in or out
of the circuit)

CR15—AC
power failure
indicator. (On
with battery
operation.)

CR12—
Transmitter
keyed

SW1—Red
button.
Used to
manually
key the
transceiver.

R13—Order
wire handset

1

MDS P-50
w/Analog
Interface/Utility
Board

J11
(Modular)

N/A
(HHT must be
connected
directly to
transceiver)

CR8—AC
power failure
indicator. (DC
power indicator
with battery
operation.)

SW1—Red
button.
Used to
manually
key the
transceiver.

R2—RX audio
level
R19—TX audio
level

MDS P-50
w/Digital
Interface/Utility
Board

J9
(Modular)

N/A
(HHT must be
connected
directly to
transceiver)

CR5—AC
power failure
indicator. (On
with battery
operation.)

CR4 Transmitter
keyed indicator

SW1—Red
button.
Used to
manually
key the
transceiver.

R19—Order
wire deviation

1

1. T hese features are not available on units equipped with an MDS 9000 Series Transceiver.

2. Control adjustment procedures are given in Chapter 5—Servicing Data.

Table 7. Interface/Utility Board Features & Indicators (Continued)

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44 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

NOTE: Unintentional sound picked up by the Order Wire handset may key

the transmitter and interrupt the normal data flow through the trans­ceiver. To prevent erratic operation of the system, remove the Order
Wire handset when the Order Wire is not in use.

Invisible place holder

Figure 23. Order Wire Handset Connected to Packaged System

(MDS P-60 shown; MDS P-50 similar)

Connecting a Hand-Held Terminal

A significant feature of GE MDS transceivers is the ability to accomplish many
radio programming and diagnostic tasks through software commands issued
from a Hand-Held Terminal (HHT). (See Figure 24 on Page 45.)

HHT control of the transceiver allows you to make several key measurements
and adjustments without the need for removing the transceiver cover, or having
to reconfigure internal switches or jumpers. The transceiver manual contains a
list of HHT commands for the specific radio installed in your system.

NOTE: When an HHT is connected, th e normal data communications

between t he Interface/Utility Board and the transceiver will be
disrupted. Disconnect the HHT to restore normal operation. Addi-

tionally, with MDS P-60 Digital Interface/Utility Boards, SW2 must
be returned to the OUT position when the HHT is disconnected.

ORDER WIRE

CONNECTION

(SEE TEXT)

HANDSET

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 45

Invisible place holder

Figure 24. MDS Hand-Held Terminal

(Kit P/N 03-1501A01)

HHT Connection to an MDS P-60

On MDS P-60 models, an HHT can be plugged directly into the Inter­face/Utility Board (except for MDS x710 models, which require a diagnostics
connection directly at the modular jack on the transceiver). Follow these steps

to connect the terminal:

1. Plug the HHT cord into the matching jack on the Interface/Utility
Board. The HHT cord is usually fitted with a plug-in adapter to
allow use with either an RJ-11 modular jack or a DB-25 connector.

• On Analog Interface/Utility Boards (03-2110Axx), use J3 (the modular
jack).

• On Digital Interface/Utility Boards (03-2472Axx), use J3 or J8 (the

DB-25 connector). After plugging in the HHT, set SW2 to the

IN posi-

tion.

2. The HHT starts a self-check routine. When the test is finished, the HHT is
ready to accept commands. Refer to the transceiver manual for radio-spe­cific commands.

On digital models, be sure to return SW2 to the

OUT position when finished

testing.

HHT Connection to an MDS P-50

On MDS P-50 models, an HHT must be plugged directly into the transceiver’s

INTERFACE DB-25 connector. Follow these steps to connect the terminal:

NOTE: For MDS x710 radios, GE MDS recommends that you plug the HHT

directly into the transceiver’s Diagnostics jack rather than the Inter­face/Utility Board.

1. Unplug the transceiver’s interface cable (a ribbon cable leading
from the transceiver to J2 on the Interface/Utility Board).

2. Plug the HHT’s coiled cord into the transceiver’s INTERFACE connector.

Z

CTRL

U

+



K

*

F

/

A

F1

V

,

Q

#

)

G

(

B

F2

SHIFT

ESC

W

=

R

7

M

4

H

1

C

F3

BKSP

X

0

S

8

N

5

I

2

D

F4

SP

ACE

Y

l

T

9

O

6

3

E

F5

ENTER

J

L

P

Older HHTs do not have
an R5-11/DB-25 adapter.
For a replacement cable
(RJ-11 to DB-25 with adapter),
contact MDS.

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46 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

3. The HHT starts a self-check routine. When the test is finished, the HHT is
ready to accept commands. Refer to the transceiver manual for radio-spe­cific commands.

When testing is finished, be sure to re-install the interface cable.

Special Note for MDS 9360 Users

The DB-25 connector on the Digital Interface/Utility Board (J8) permits direct
connection of an HHT or PC for diagnostic testing or link evaluation of an
MDS 9300 Series spread spectrum transceiver. A standard RS-232/EIA-232
cable may be used for connection to a PC.

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 47

5.0 SERVICING DATA

5.1 Introduction

This chapter contains information for keeping the packaged system in peak
operating condition, as well as procedures for performing minor field adjust­ments and troubleshooting. This service information is intended to augment the
transceiver manual shipped with your system.

5.2 Preventive Maintenance

The packaged systems are designed for long life and trouble-free operation.
However, because these units are frequently installed in outdoor environments,
periodic inspection of the equipment is more important than it would be for
equipment mounted indoors.

The unit should be checked occasionally for loose or corroded hardware, loose
cable connections, and damage to the exterior housing. The door seals and
cable entrances should also be checked for signs of leakage or other damage.
When performing preventive maintenance, it is also a good idea to check
related equipment, such as the antenna system and remote terminal unit, for
signs of damage or loose connections. Consult the applicable instruction
manual(s) for maintenance recommendations.

The transceiver instruction manual contains many transceiver maintenance
checks that can be made with an HHT. Specific items to check include RF
power output, received signal strength (RSSI), supply voltage and current
draw.

5.3 Fuse Replacement

The packaged systems are equipped with several fuses to guard against
over-current conditions. When a fuse blows, you should try to find the cause
of the problem before replacing the fuse. A blown fuse could be caused by a
short circuit, power surge or nearby lightning discharge.

Table 8 on page 48 contains a list of all fuses used in the packaged radio sys-

tems. In the MDS P-60, all fuses are located on the Interface/Utility Board. In
the MDS P-50, there are two fuses installed on the Interface/Utility Board and

one fuse installed in the battery cabling (inline fuse). Additionally, there is a

fuse inside all transceivers. (Refer to the applicable transceiver manual for

replacement instructions.)

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48 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

For continued protection, replacement fuses must be of the same size and

rating. Be sure to disconnect primary power from the station before removing

or replacing a fuse.

5.4 Backup Battery

Backup Battery Testing

If the unit is equipped with a backup battery, the system should be tested occa­sionally for proper backup operation. To do this, temporarily shut off the AC
power to the station and check for continued radio operation. (If possible, the
system should be tested for 30 minutes or more on backup power.) If a battery

is found to be defective, refer to Backup Battery Replacement below for

replacement instructions. Steps are also given later in this chapter for checking
and adjusting the battery charging rate.

Table 8. Equipment Fuses

Equipment Model Ref Desig. Function Type

MDS P-60 F1, F2 Primary Power Refer to

Table 9

F3 Transceiver Power 3AG,

Fast,
250V,
3A

F4 Battery 3AG,

Fast,
250V,
3A

F5 Accessory (Analog

boards only)

1A/3AG

MDS P-50 F1, F2 Primary Power 2A/3AG

— Battery Fuse

(Inline)

5A/5AG

Table 9. F1/F2 Fuses for P-60 Models

Power Supply Installed F1/F2 Fuse Rating

12 Vdc (w/o converter) 3AG, Fast, 250V, 3A
12 Vdc (w/ converter) 3AB, Normal, 250V, 10A
24 Vdc (w/ converter) 3AG, Fast, 250V, 4A
48 Vdc (w/ converter) 3AG, Fast, 250V, 2A
125 Vdc (w/ converter) 3AG, Fast, 250V, 2A
115 Vac 3AG, Slow, 250V, 1.5A
230 Vac 3AG, Fast, 250V, 1A

Other voltages Consult Factory

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 49

Backup Battery Replacement

Backup batteries have a limited service life. The length of time a battery lasts
depends on many factors, including the charging rate, number of discharge
cycles and the ambient temperature at the installation site. If a backup battery
is found to be defective, follow these steps to replace it:

1. Turn off the primary power to the station.

2. Unplug the battery cable from J4 on the Interface/Utility Board.

3. Remove the battery bracket screws and the battery pack. Properly discard
the defective battery.

4. Install the new battery pack and re-install the battery bracket.

5. Connect the cable assembly between the battery and J4 on the Inter­face/Utility Board.

6. Re-apply primary power to the station.

Charging Adjustment

Refer to Battery Charging Check—AC-Powered Units Only on page 65. (Sep­arate procedures are given for MDS P-50 and MDS P-60 Packaged systems.)

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50 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

5.5 System Troubleshooting

If difficulties are experienced with the packaged system, Table 10 can be used
to help isolate the faulty element. See also the troubleshooting instructions
given in the associated transceiver manual.

If troubles persist, technical assistance is available from GE MDS’ Customer
Support by calling [phone]. Please have the complete model
number code of the packaged system ready when calling for assistance. Refer
to the inside back cover of this manual for more information.

Table 10. Packaged System Troubleshooting Chart

Symptom Corrective Action

Unit does not operate a) Check for primary power

b) Check for blown fuses
c) Check for secure cabling connections

Unit does not operate on backup
battery, or runs only a short time

a) Check to see that battery is being charged properly (see

Battery Charging Check—AC-Powered Units Only

on

page 65).

b) Battery may be defective. If so, replace it with a functioning unit.

(see Battery Charging Check—AC-Powered Units Only
on page 65).

Transmitter does not key a) Manually key the transmitter with SW1 on the Interface/Utility

Board
b) Check cabling to external data equipment (RTU)
c) Check for secure cabling connections

System transmits and receives, but
overall performance is poor

a) Check antenna system for damage or antenna misalignment
b) Check for secure cabling connections
c) Check for proper supply voltage
d) Check transceiver for proper RF output
e) Check transceiver for proper frequency programming

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 51

5.6 List of Replaceable Assemblies

Table 11 and Table 12 on page 52 show a list of replaceable parts for the MDS

P-60 and MDS P-50, respectively. The parts used in a given system depend on

the configuration of the packaged system. Therefore, not all of the parts listed
will be used in every model. Please have the complete model number code for
your packaged system ready when ordering parts.

Table 11. MDS P-60 Replacement Parts

Part Name Description GE MDS Part Number

Transceiver Standard GE MDS

remote transceiver

MDS 2300, 4300 or
9300 Series
MDS 4710, 9710, or
9810 Series

Power Supply Assemblies
(AC and DC)

Converts primary power
to level required by the
radio system

120 VAC: 03-2168A01
12 VDC: 03-1212A05
24 VDC: 03-1212A02
48 VDC: 03-1212A03
125 VDC: 03-1212A04

Interface/Utility Board Provides system control

and interfacing.
Connection point for
external accessories.

Analog: 03-2110A01
(2300/4300 Series)

Digital: 03-2472A01
(2300/4300 Series)
03-2472A02
(9300 Series)
03-2472A03
(9800 Series)

Backup Battery Assembly 12V/4.6 Ah

(Not used in DC
powered models)

03-1575A02

Transceiver Interface Cable Connects the

transceiver data
connector to the
Interface/Utility Board

03-2160A01

Transceiver DC Power
Cable

Connects the
transceiver and
Interface/Utility Board
power connectors

03-1846A05
(2300, 4300, 9800
Series)

03-2250A02 (9300
Series)

External Interface
Connector

Connection point for
cabling to RTU

73-1194A19

Primary Power Connector Connection point for

primary power wiring

73-1194A18

Fiberglass Enclosure NEMA 4, weather

resistant

98-2830EN

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52 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

Invisible place holder

Invisible place holder

5.7 Packaged System Adjustments—MDS P-60

Transmit/Receive Audio Level (Analog Interface/Utility
Board, P/N 03-2110A01)

The Analog Interface/Utility Board has two audio level controls—one to set
the transceiver modulation input level from the associated external equipment,
and a second level control to set the output audio level fed to the external
equipment. The setting of these controls assumes the associated transceiver has
been properly tested and adjusted prior to installation. The audio input and
output levels are preset at the factory before shipment.

Table 12. MDS P-50 Replacement Parts

Part Name Description GE MDS Part Number

Transceiver Standard GE MDS

remote transceiver

MDS 2300, 4300 or 9300 Series
MDS 4710, 9710, or 9810

Power Supply Assemblies
(AC and DC)

Converts primary power
to level required by the
radio system

120 VAC: 03-1143A02
12 VDC: 03-1212A05
24 VDC: 03-1212A02
48 VDC: 03-1212A03
125 VDC: 03-1212A04

Interface/Utility Board Provides system control

and interfacing.
Connection point for
external accessories

Analog: 03-1105A21
(2300/4300 Series)

Digital: 03-1467A21
(2300/4300 Series)
03-1467A22
(9800 Series)

Backup Battery Assembly 12V/5 Ah (Not used in

DC units)

03-1142A02

Transceiver Interface Cable Connects the

transceiver data
connector to the
Interface/Utility Board

03-1465A01

Transceiver DC Power
Cable

Connects the
transceiver and
Interface/Utility Board
power connector

03-1846A03
(2300, 4300,9800 Series)

03-2250A02 (9300 Series)

External Interface
Connector

Connection point for
cabling to RTU

73-1194A10

Primary Power Connector Connection point for

primary power wiring

73-1194A06

Fiberglass Enclosure NEMA 4, weather

resistant

98-1926EN

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 53

Transmit Audio Level, R9

While monitoring the transmitted signal on a communications service monitor,
adjust the Transmit Audio Level control (TX AUDIO), R9, to achieve the
desired deviation level—2.5 kHz for 12.5 kHz channel operation, and 3.0 kHz
for 25 kHz channel operation. The

TX TEST switch, SW1, on the Inter-

face/Utility Board, can be used to manually key the transmitter during this
adjustment. The audio present on Pins 1 and 2 of TB1 is used to modulate the
transmitter. The level must be within the range of –20 dBm to +10 dBm.

Receive Audio Level, R10

The Receive Audio Level control (RX AUDIO), R10, is used to set the out­going signal level to Pins 4 and 5 of J1. With an actual or simulated signal
being received by the transceiver, adjust R10 to achieve the desired line level
signal to the associated remote equipment. The maximum output level is + 6
dBm at 600. Consult the RTU manual for specific recommendations.

Order Wire Levels (Analog Interface/Utility Board, P/N
03-2110A01)

The MDS P-60 Analog Interface/Utility Board has an Order Wire Level con-

trol, R28, used to set the transmit modulation level (deviation) of the audio
from the local Order Wire handset’s microphone. The Order Wire handset is
plugged into J1 on the Interface/Utility Board.

While monitoring the transmitted signal on a communications service monitor,
adjust the Order Wire Level control, R28, to achieve the desired deviation
level—2.5 kHz for 12.5 kHz channel operation, and 3.0 kHz for 25 kHz
channel operation. The radio is keyed automatically by speaking into the Order
Wire handset.

Order Wire Levels (Digital Interface/Utility Board, P/N
03-2472A01)

The MDS P-60 Digital Interface/Utility Board has an Order Wire Level con-

trol, R13, used to set the transmit modulation level (deviation) of the audio
from the local Order Wire handset’s microphone. The Order Wire handset is
plugged into J1 on the Interface/Utility Board.

While monitoring the transmitted signal on a communications service monitor,
adjust the Order Wire Level control, R13, to achieve the desired deviation
level—2.5 kHz for 12.5 kHz channel operation, and 3.0 kHz for 25 kHz
channel operation. The radio is keyed automatically by speaking into the Order
Wire handset (VOX).

NOTE: Unintentional sound picked up by the Order Wire handset may key

the transmitter and interrupt the normal data flow through the trans­ceiver. To prevent erratic operation of the system, remove the Order
Wire handset from the packaged systems when the Order Wire is not
in use.

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54 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

Battery Charging Check—AC-Powered Units Only

For proper charging of the battery, the power supply must be set at the correct
output voltage. As standard procedure, the factory checks and adjusts the
charging voltage before shipment. To check for proper charger output, use the
following procedure:

1. Disconnect the battery by removing the plug from J4 on the
Interface/Utility Board.

2. Connect a 1.5 k resistor (1/4 watt or larger) between Pins 2 & 3 of J4.
These are the two pins closest to the squared end of the jack’s shell. The
resistor is used to simulated the load of a discharged battery.

3. Measure the voltage present at the battery fuse, F4, referenced to power
supply negative. This voltage should be 14.10 Vdc; if not, the power
supply voltage should be adjusted to produce 14.10 Vdc. The power
supply output voltage can be adjusted with voltage adjustment pot R11
within the power supply unit (accessible through the hole on the side of its
chassis plate).

4. Remove the 1.5 k resistor from J4 and re-install the mating battery con­nector into J4.

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 55

5.8 Service Drawings and Reference Data—

MDS P-60

This section contains assembly drawings and wiring diagrams for the MDS

P-60 packaged system. Additionally, schematic diagrams are included for the
Analog and Digital Interface/Utility Boards.

Invisible place holder

Figure 25. MDS P-60 Interior (AC Version)

NEMA enclosure not shown

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56 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

Invisible place holder.

Figure 26. Exploded View of MDS P-60 (AC Version)

NEMA enclosure not shown

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 57

Invisible place holder

Figure 27. Exploded View of MDS P-60 (DC Version)

Analog interface/utility board shown;

NEMA enclosure not shown

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58 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

Invisible place holder

Figure 28. MDS P-60 Packaged System Interconnection Diagram

With 03-2110A01 Analog Interface/Utility Board Installed

10RSSI

6, 3, 11GND

12+13 ACCY

TX AUDIO

TX AUDIO
RX AUDIO

RX AUDIO

RTU

INTERFACE

TB1

1

2
4

5

PTT +

PTT –78

LINE 2

DC –

DC +

LINE 1

462

1

RADIO
TRANSCEIVER

AC LINE 1/DC –

AC LINE 2/DC +

TB2

GROUND

1
2

3

PRIMARY

POWER

INTERFACE

POWER SUPPLY

ASSEMBLY

J4 ANTENNA

ANTENNA

CONNECTOR

10

11

14, 26

21

6

RSSI

TX AUDIO
RX AUDIO

PTT

GND

9
11

10

14

1,7

J1 (DB-25 )

INTERFACE

AC ALARM 9

J5

J4

3

GND

2

+ 12 V

NOT USED IN

DC POWERED

MODELS

12V BATTERY

J2

POWER
CONNECTOR

J2

+13 V

GND

RED +

BLACK –

2

1

J7

F1

F2

F3

F4

F5

03-2110A01
INTERFA CE

& UTILITY P CB

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 59

Invisible place holder

Figure 29. Analog Interface/Utility Board, P/N 03-2110A01

Component Locations

SW1

Back-up

Battery

XCVR Power

Fuse

F33A/3AG

Battery

Fuse

F45A/3AG

Accessory

Fuse

F51A/3AG

Transmit

Test
Key

To

Power

Supply

Primary

Power Fuses

F1/F22A/3AG

Transceiver

Interface

Hand-

Held

Terminal

Jack

Not Used AC Power

Failure

LED

Order Wire

Handset

Jack

TX

Audio

Level

RX

Audio

Level

Primary

Power

Order Wire
Deviation

00-00000-00

Interface

Connector

XCVR
Power

3

2

1

J4

J7

F5

F4

F3

PTT

Active

LED

CR10

R24

R37

C13 +

J2

J3

J6

J1

26 25

21

U4

R39

R38

R40

U6

R34

R33

U5

U3

R26

CR8

R16

R17

R21

R22

R6

C10

C11

C12

R30

C14
R36

R23

R35

+ C8

C7 +

R29

R28

R13

C4

R12

C5

R18

R27

C3

R11

R25

R15

C26

25

+ C6

C9 + R2 0

R32

R7

R5

R14

R31

R19

CR5

U1

R8

R9

CR3

+ C2

+ C1

R10

CR11

U2

CR7

J5

V3

V2

V1T1

T2

R2R1 R3CR4

4

5

6

6

4

5

1

1

2

2

3

3

F1

F2

MOV1 MOV2

TB1

TB2

CR1

R4

RS-232 Interface

LINE 2/DC+

NEUTRAL

LINE 1/DC-

+13V ACCY

GND

RSSI

AC ALARM

KEYLINE LO

KEYLINE HI

GND

RX AUDIO

RX AUDO

GND

TX AUDIO

TX AUDIO

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60 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

Invisible place holder

Figure 30. MDS P-60 Packaged System Interconnection Diagram

with 03-2472Axx Digital Interface/Utility Board Installed

03-2168A01—120 VAC
03-1324A21—12VDC
03-1324A22—24VDC
03-1324A23—48VDC
03-1324A24—125VDC

RTU

INTERFACE

TB1

LINE 2

DC –

DC +

LINE 14

6

2

1

RADIO
TRANSCEIVER

AC LINE 1/DC –

AC LINE 2/DC +

TB2

GROUND12

3

POWER SUPPLY

ASSEMBLY

1

RXD

TXD

RTS

CTS

DCD

DSR

3

2

4

5

7

6

GND

RSSI

11

J4 ANTENNA

ANTENNA

CONNECTOR

+13 V

GND

24

22
20

18

16

12
14,26

RTS

CTS

DCD

DSR

RXD

GND

2

3
4

5

6

8

1,7

TXD

J1 (DB-25)

INTERFACE

POWER
CONNECTOR

J2

RED +

BLACK –

AC ALARM

12

J5

J4

3

GND

2

+ 12 V

NOT USED IN

DC POWERED

MODELS

12V BATTERY

J2

2

1

J7

F1

F2

F3

F4

03-2472Axx
INTERFACE

& UTILITY PCB

PRIMARY

POWER

INTERFACE

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 61

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Figure 31. Interface Wiring for iNET Transceivers (using COM2 port)

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62 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

Invisible place holder

Figure 32. Interface Wiring for TransNET Transceivers (or iNET using COM1 port)

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 63

Invisible place holder

Figure 33. Digital Interface/Utility Board, P/N 03-2472A03

Component Locations

00-00000-00

2

Order Wire

Handset

Jack*

Not

Used

Hand-Held

Terminal/PC

Connection

VOX

TX

LED*

Hand-

Held

Terminal

IN/OUT

Back-

up

Battery

XCVR Power

Fuse

F33A/3AG

Battery

Fuse

F45A/3AG

Transmit

Test

Key*

To Power

Supply

Primary

Power Fuses

F1/F22A/3AG

AC

Power

Failure

LED

Order Wire

Handset

Level*

Primary

Power

XCVR
Power

Interface

Interface

Connection

Hand-Held

Terminal

(Alternate Connection)

J2

J1

J6

J3

IN

OUT

2

1

26 25

R31

CR12

SW2

CR11

CR10

CR9

CR8

CR7

CR6

CR5

CR4

CR3

CR2

CR1

J5

SW1

R13

J8

J9

J10

R16

CR15

R25

C10

R20

R21

R26

CR17

C9

R19

U3

R30

C11 +

U4

R28

R27

R22

R23

R29

R24

R18

R10R11

R2

C3

R4

C2

C1

R1

R5

R6

C8 +

R3

+ C6

+ C4

R7

U1

C12 +

R17

C5

R12

R8

CR14

R9

CR13

CR16

F1

F2

J4

J7

F3

F4

2

1

MOV1

MOV2

TB2

TB1RS-232 Data Interface

LINE 2/DC+

NEUTRAL

LINE 1/DC-

AC ALARM

RSSI

ETC

RC

TC

DCD

DSR

CTS

RTS

RXD

TXD

GND

3

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64 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

Invisible place holder

Figure 34. Digital Interface/Utility Board, P/N 03-2472A02

Component Locations

NOTE: Some ea rly packaged models we re equipped with an 03-2115Axx

Digital Interface/Utility Board. The primary difference in this earlier
board is that it does not have a DB-25 connector for terminal connec­tion. (Modular jack J3 is used for terminal connection on these early
models.) In all other respects, it is very similar to the 03-2472Axx
PCB.

5.9 Packaged System Adjustments—MDS P-50

Transmit/Receive Audio Level (Analog Interface/Utility
Board, P/N 03-1105A21)

The Analog Interface/Utility Board has two audio level controls—one to set
the Transceiver input modulation level from the associated external equip­ment, and a second to set the output audio level fed to the external equipment.
The setting of these controls assumes the associated transceiver has been prop­erly tested and adjusted prior to installation.

00-00000-00

2

Order Wire

Handset

Jack*

Not

Used

Hand-Held

Terminal/PC

Connection

Back-up

Battery

XCVR Power

Fuse

F33A/3AG

Battery

Fuse

F45A/3AG

To Power

Supply

Primary

Power Fuses

F1/F22A/3AG

AC

Power

Failure

LED

Primary

Power

XCVR
Power

Transceiver

Interface

Interface

Connection

Hand-Held

Terminal

(Alternate Connection)

J4

J7

F4

F3

CR16

F1

F2

U4

R28

R27

R22

R23

C11 +

R30 R26

R21

R20

R25

CR15

J5

J1

J2

J3

J6

J9

J8

R31

CR11

CR10

CR9

CR8

CR7

CR6

CR5

CR4

CR3

CR2

CR1

26

25

21

CR17

LINE 2/DC+

NEUTRAL

LINE 1/DC-

AC ALARM

RSSI

ETC

RC

TC

DCD

DSR

CTS

RTS

RXD

TXD

GND

RS-232 Data Interface

TB1 TB2

MOV1 MOV2

3

2

1

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 65

Transmit Audio Level, R19

While monitoring the transmitted signal on a communications service monitor,
adjust the Transmit Audio Level control, R19, to achieve the desired deviation
level of 2.5 kHz for 12.5 kHz channel operation, or 3.0 kHz for 25 kHz channel
operation. The

TX TEST switch, SW1, on the Interface/Utility Board can be

used to manually key the transmitter during this adjustment. The audio present
on Pins 1 and 2 of J1 is used to modulate the transmitter. The level must be
within the range of –20 dBm to +10 dBm.

Receive Audio Level, R2

The Receive Audio Level control, R2, is used to set the outgoing signal level
to Pins 4 and 5 of J1. With an actual or simulated signal being received by the
transceiver, adjust R2 to achieve the desired line level signal to the associated
remote equipment. The outgoing level depends on the desired signal level at
the remote terminal unit. The maximum output level is + 6 dBm at 600. Con-
sult the RTU manual for specific recommendations.

5.10 Order Wire Levels (Analog Interface/Utility
Board P/N 03-1105A21)

On an MDS P-50 Analog Interface/Utility Board, the Order Wire level is fac-

tory set with fixed resistors. There are no Order Wire level adjustments on this
board.

Order Wire Levels (Digital Interface/Utility Board
03-1467A21)

The Interface/Utility Board has an Order Wire Deviation control, R19, used to
set the transmit modulation level of the audio from the local Order Wire
handset’s microphone. The Order Wire handset is plugged into J9 on the Inter­face/Utility Board.

While monitoring the transmitted signal on a communications service monitor,
adjust the Order Wire Level control, R19, to achieve the desired deviation
level—2.5 kHz for 12.5 kHz channel operation, and 3.0 kHz for 25 kHz
channel operation. The radio is automatically keyed by speaking into the Order
Wire handset (VOX).

NOTE: Unintentional sound picked up by the Order Wire handset may key

the transmitter and interrupt the normal data flow through the trans­ceiver. To prevent erratic operation of the system, remove the Order
Wire handset when the Order Wire is not in use.

Battery Charging Check—AC-Powered Units Only

For proper charging of the battery, the power supply must be set at the correct
output voltage. To check for the correct charger output, perform the following
procedure:

1. Disconnect the battery by removing the plug from J4 on the

Interface/Utility Board.

2. Connect a 1.5 k (1/4 watt or larger) resistor between Pins 2 & 3 of J4. This

simulates the load of a discharged battery.

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66 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

3. Measure the voltage present at the cathode of the large diode (CR9 on

Analog boards, CR1 on Digital boards), referenced to power supply nega­tive. This voltage should be 14.10 Vdc; if not, the power supply voltage
should be adjusted to produce 14.10 Vdc at the cathode (banded end) of
the diode. The power supply output voltage can be adjusted with voltage
adjustment pot R11 within the AC power supply unit (accessible through
the hole on the side of its cover).

4. Remove the 1.5 k resistor from J4 and re-install the mating battery con-

nector into J4.

5.11 Service Drawings and Reference Data—
MDS P-50

This section contains assembly drawings and wiring diagrams for the MDS

P-50 packaged system. Additionally, schematic diagrams are included for the
Analog and Digital Interface/Utility Boards.

Invisible place holder

Figure 35. MDS P-50 Interior View

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 67

Invisible place holder

Figure 36. MDS P-50 Packaged System Interconnection Diagram

with 03-1105A21 Analog Interface/Utility Board Installed

NOT USED IN

DC POWERED

MODELS

12V BATTERY

TX AUDIO

TX AUDIO
RX AUDIO
RX AUDIO

RTU

INTERFACE

J1

1

2
4
5

9

PTT +

PTT –

7
8

AC FAILURE

J7

AC (DC+)

DC –

DC +

AC (DC–)

462

1

RADIO
TRANSCEIVER

POWER
CONNECTOR

J4

AC HI

AC LO

J3

03-1105A21

ANALOG

INTERFACE BOARD

GND

1
2

3

PRIMARY

POWER

INTERFACE

3

GND/DC –

2

+ 12 V

J4 ANTENNA

ANTENNA

CONNECTOR

J2

15

10

11

14, 26

21

6

RSSI

TX AUDIO

RX AUDIO
+8 V

PTT
GND

J1 (DB-25)

9

11
19
21

16

1,7

J2

J5

J6

+13 V

GND

INTERFACE

RED +

BLACK –

3A/3AG/FB

POWER SUPPLY

ASSEMBLY

OUTIN

10

+13 VDC

11

GND

DC +

DC –

12

RSSI

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68 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

Invisible place holder

Figure 37. MDS P-50 Analog Interface/Utility Board, P/N 03-1105A21

Component Locations

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Manual 69

Invisible place holder

Figure 38. MDS P-50 Packaged System Interconnection Diagram

with 03-1467A21 Digital Interface/Utility Board Installed

17

RTU

INTER FACE

J1

RADIO

TRANSC EIVER

J4

3GN

D/

DC–

2+12V

1

RXD

TXD

RTS

CTS

DCD

DSR

3

2

4

5

7

6

GND

TC

8

NOT US ED IN

DC P OWER ED

MODE LS

12V B ATT E R Y

ANTE NNA

J4

ANTENNA

CONNECTOR

J2

J1 (DB -25)

INTER FACE

J5

J6

+13 V

RED +

GND BLACK –

4A/4AG/FB

J7

AC (DC+)

DC –

DC +

AC (DC–)

4

6

2

1

03-1143A02—120 VAC
03-1324A01—12 VDC
03-1324A02—24 VDC
03-1324A03—48 VDC
03-1324A04—125 VD C

POWER SUPPLY

ASS EMBLY

OUTIN

RC

9

ETC

10

RSSI

11

AC F AILURE

12

AC HI

AC LO

J3

GND

1
2

3

PRIMARY

POWER

INTER FACE

DC +

DC –

20

22

23

26

RXD

TC

GND

RTS 4

3

15

1

24
5

11

12

16

18
19

RSSI

DCD

CTS

DSR

ETC

RC

2
24

21

8

6

5

TXD

POWER
CONNECTOR

J2

03-1467A21—RS -232/T TL

INT E R FA CE B OA RD

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70 MDS P-60/P-60 HL Reference Manual MDS 05-2818A01, Rev. C

Invisible place holder

Figure 39. MDS P-50 Digital Interface/Utility Board, P/N 03-1467A21

Component Locations

J7

J4

1

1

J8

1

F2

J2

1

J1

1

J6

J5+–

F1

MOV1

MOV2

J3

1

3

46

C9+

R9

R10

C8C6+

+

SW1

R19

U2

U3

R22

R7
R8
R20

CR2
R15

R21

CR5

R18

R6

R13
C4
R16
R14

C11+

U1

CR3

J10

+

C5

J9

R12

R4

R11

R1
R2
R3

C1
C2

R17

C3

R5

CR1

PRIMARY

POWER

INPUT

(AC or DC as

indicated on

chassis label.)

+

–

13 VDC

ACCESSORY

DC POWER OUT

+

–

BATTERY

BACK-UP

AC POWER FAILURE

INDICATOR

(On with battery operation.)

ORDERWIRE

DEVIATION

ORDERWIRE

HANDSET

INTERFACE
CONNECTION

25 26

2

ACCESSORY
EQUIP. FUSE

(2 Amps DC Max )

PRIMARY POWER

INPUT FUSE

TRANSCEIVER

INTERFACE

(TO DB-25)

TO AC POWER

SUPPLY

TRANSMITTER
KEYED
INDICATOR

CHASSIS
GROUND

TRANSCEIVER

DC POWER

+–

AC FAIL

TX

TX

TRANSMIT

TEST KEY

23456789101112

12345678910

NOT USED

CR4

SGN-STRENGTH

CR17

CR18

CR19

CR20

CR21

CR22

CR23

CR24

CR6

CR8

CR10

CR12

CR14

CR16

CR7

CR9

CR11

CR13

CR15

GND

TXD

RXD

RTS

CTS

DSR

DCD

TC

RC

ETC

AC FAIL

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Guide I-1

INDEX

A

Accessories 11
Adjusting

audio level, transmit/receive (P-50) 64
audio level, transmit/receive (P-60) 52
order wire levels (P-50) 65
order wire levels (P-60) 53

Analog interface/utility board

component locations, P-50 (illustrated) 68
component locations, P-60 (illustrated) 59
connections, P-50 32
keying options, P-50 (illustrated) 35
keying options, P-60 (illustrated) 22

analog interface/utility board

connections, illustrated 33
Assembly, low-voltage disconnect 39
Audio & keyline connections (analog interface/utility board),

P-60 19

Audio level, adjusting

P-50 64

P-60 52

B

Battery

backup operation 39

backup, charging adjustment 49

backup, replacement 49

backup, testing 48

charging check, P-50 65

charging check, P-60 54

low-voltage disconnect assembly 39

C

Cable connections

P-50 31–32

P-60 17–18
Cables

connection points, P-50 (illustrated) 31

connection points, P-60 (illustrated) 17
Connections

additional P-50 34

additional P-50 digital 37

additional P-60 21

additional P-60 interface 24

analog interface/utility board, P-50 32

audio & keyline (analog interface/utility board), P-60 19

cable connection points, P-50 (illustrated) 31

cable connection points, P-60 (illustrated) 17

digital interface/utility board, P-50 36

digital interface/utility board, P-50 (illustrated) 37

digital interface/utility board, P-60 23

hand-held terminal to P-50 45

hand-held terminal to P-60 45

hand-held terminal to packaged system 44

interconnection with analog interface/utility board (P-50),

illustrated 67

interconnection with analog interface/utility board (P-60),

illustrated 58

interconnection with digital interface/utility board (P-50),

illustrated 60, 61, 62
order wire handset 43
order wire handset to packaged system, illustrated 44
plugs for TB1 and TB2, illustrated 19

D

Description, equipment 8
Diagnostics and programming 10
Digital interface/utility board

connections, P-50 36
connections, P-60 23
P-50 component locations, illustrated 70
P-60 (illustrated) 24
P-60, P/N 03-2472A02 component locations, illustrated 64
P-60, P/N 03-2472A03 component locations, illustrated 63

E

Enclosure types 8
Equipment description 8

F

Fuses

replacing 47

H

Hand-held terminal

connecting to P-50 45
connecting to P-60 45
connection to packaged system 44

I

Illustrations

analog interface/utility board component locations

(P-50) 68
analog interface/utility board component locations

(P-60) 59
analog interface/utility board connections, P-50 33
analog interface/utility board, P-60 20
cable connection points, P-50 31
cable connection points, P-60 17
digital interface/utility board component locations

(P-50) 70
digital interface/utility board component locations (P-60,

P/N 03-2472A02) 64
digital interface/utility board component locations (P-60,

P/N 03-2472A03) 63
exploded view, P-60 (AC version) 56, 57
interconnection diagram with analog interface/utility board

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I-2 MDS P-60/P-60 HL Reference Guide MDS 05-2818A01, Rev. C

(P-50) 67

interconnection diagram with analog interface/utility board

(P-60) 58

interconnection diagram with digital interface/utility board

(P-50) 60, 61, 62
interior view, P-50 66
interior view, P-60 (AC version) 55
keying options, P-50 analog interface/utility board 35
keying options, P-60 analog interface/utility board 22
low-voltage disconnect assembly (component locations) 40
low-voltage disconnect assembly (line diagram) 41
low-voltage disconnect assembly (schematic diagram) 41
MDS P-50 mounting dimensions 27
MDS P-60 mounting dimensions 13
MDS packaged radio systems 8
order wire handset connected to packaged system 44
P-50 digital interface/utility board connections 37
P-60 digital interface/utility board 24
plugs for TB1 and TB2 connectors 19
pole mounted installation, P-50 29
pole mounted installation, P-60 15
typical rack mount installation, P-50 30
typical rack mount installation, P-60 16
typical wall mount installation, P-50 28
typical wall mount installation, P-60 14, 15

Installation

additional P-50 interface connections 34
additional P-60 interface connections 21
cable connections, P-50 31–32
cable connections, P-60 17–18
considerations, P-50 26
considerations, P-60 12
final P-50 tasks 38
mounting the P-50 enclosure 26
mounting the P-60 enclosure 12
pole mounting instructions, P-50 28
pole mounting instructions, P-60 15
rack mount alternative, P-50 29
rack mount alternative, P-60 16
wall mounting instructions, P-50 27
wall mounting instructions, P-60 13

K

Keying

options, illustrated 22, 35
P-50 34–35
P-60 20–22

L

Low-voltage disconnect assembly 39

M

Maintenance

adjustments, P-50 64–66
adjustments, P-60 52–54
battery charging check, P-50 65
battery charging check, P-60 54
fuse replacement 47
preventive 47
service drawings, P-50 66–70

MDS 9360, special note for users 46
Mounting dimensions, MDS P-50 27

Mounting dimensions, MDS P-60 13
Mounting the P-50 enclosure 26
Mounting the P-60 enclosure 12

O

Operation

battery backup 39
connecting an order wire handset 43
initial power-up 39
operational test 42
using interface/utility board features and indicators 42

Order wire

adjusting levels, P-50 65
adjusting levels, P-60 53
connecting a handset 43
handset, connection to packaged system, illustrated 44

P

P-50

additional digital connections 37
analog interface/utility board connections 32
Analog interface/utility board connections, illustrated 33
cable connections 31–32
connecting hand-held terminal to 45
digital interface/utility board connections 36
digital interface/utility board connections, illustrated 37
installation considerations 26
installation, final tasks 38
interconnection diagram with analog interface/utility

board 67

interconnection diagram with digital interface/utility

board 60, 61, 62
interior view, AC version (illustrated) 55
interior view, illustrated 66
keying 34–35
keying options (analog interface/utility board),

illustrated 35
mounting dimensions 27
mounting the enclosure 26–30
pole mounted installation, illustrated 29
pole mounting instructions 28
rack mount alternative 29
rack mount installation, illustrated 30
service drawings 66–70
typical wall mount installation (illustrated) 28
unpacking and inspection 26
wall mounting instructions 27

P-60

additional interface connections 24
analog interface/utility board, illustrated 20
audio & keyline connections (analog interface/utility

board) 19
cable connections 17–18
connecting hand-held terminal to 45
digital interface/utility board connections 23
digital interface/utility board, illustrated 24
exploded view, AC version (illustrated) 56, 57
installation considerations 12
interconnection diagram with analog interface/utility

board 58
keying 20–22
keying options (analog interface/utility board),

illustrated 22
mounting dimensions 13

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MDS 05-2818A01, Rev. C MDS P-60/P-60 HL Reference Guide I-3

mounting the enclosure 12–16
plugs for TB1 and TB2 connectors, illustrated 19
pole mounted installation, illustrated 15
pole mounting instructions 15
rack mount alternative 16
rack mount installation, illustrated 16
typical wall mount installation (illustrated) 15
typical wall mounted installation (illustrated) 14
unpacking and inspection 12

wall mounting instructions 13
Packaged radio systems, illustrated 8
Packaged systems

accessories 11

specifications 10
Pole mounting instructions, P-50 28
Pole mounting instructions, P-60 15
Power

initial power-up 39

low-voltage disconnect assembly 39
Power, primary 9
Programming and diagnostics 10

R

Rack mount installation, P-50 (illustrated) 30
Rack mount installation, P-60 (illustrated) 16
Rack mounting, P-50 29
Rack mounting, P-60 16

S

Specifications 10

T

Tab les

J1 pin connections (analog interface/utility board), P-50 33

troubleshooting chart 50
Transmit/receive audio level, adjusting

P-50 64

P-60 52
Troubleshooting 50

table of symptoms and corrective actions 50

U

Unpacking and inspection, P-50 26
Unpacking and inspection, P-60 12

W

Wall mounting instructions, P-50 27
Wall mounting instructions, P-60 13

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I-4 MDS P-60/P-60 HL Reference Guide MDS 05-2818A01, Rev. C

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IN CASE OF DIFFICULTY...

GE MDS products are designed for long life and trouble-free operation. However, this equipment, as with
all electronic equipment, may have an occasional component failure. The following information will assist
you in the event that servicing becomes necessary.

TECHNICAL ASSISTANCE

Technical assistance for GE MDS products is available from our Technical Support Department during
business hours (8:00 A.M.–5:30 P.M. Eastern Time). When calling, please give the complete model
number of the radio, along with a description of the trouble/symptom(s) that you are experiencing. In many
cases, problems can be resolved over the telephone, without the need for returning the unit to the factory.
Please use one of the following means for product assistance:

Phone: [phone] E-Mail:

[e-mail]

FA

X: 585 242-8369 Web: www.gemds.com

F A CTORY SERVICE

Component level repair of this equipment is not recommended in the field. Many components are installed
using surface mount technology, which requires specialized training and equipment for proper servicing.
For this reason, the equipment should be returned to the factory for any PC board repairs. The factory is
best equipped to diagnose, repair and align your radio to its proper operating specifications.

If return of the equipment is necessary, you must obtain a Service Request Order (SRO) number. This
number helps expedite the repair so that the equipment can be repaired and returned to you as quickly as
possible. Please be sure to include the SRO number on the outside of the shipping box, and on any corre­spondence relating to the repair. No equipment will be accepted for repair without an SRO number.

SRO numbers are issued online at www.gemds.com/support/product/sro/. Your number will be issued
immediately after the required information is entered. Please be sure to have the model number(s), serial
number(s), detailed reason for return, "ship to" address, "bill to" address, and contact name, phone number,
and fax number available when requesting an SRO number. A purchase order number or pre-payment will
be required for any units that are out of warranty, or for product conversion.

If you prefer, you may contact our Product Services department to obtain an SRO number:

Phone Number: 585-241-5540
Fax Number: 585-242-8400
E-mail Address: [e-mail]

The radio must be properly packed for return to the factory. The original shipping container and packaging
materials should be used whenever possible. All factory returns should be addressed to:

GE MDS, LLC
Product Services Department
(SRO No. XXXX)
175 Science Parkway
Rochester, NY 14620 USA

When repairs have been completed, the equipment will be returned to you by the same shipping method
used to send it to the factory. Please specify if you wish to make different shipping arrangements. To
inquire about an in-process repair, you may contact our Product Services Group using the telephone, Fax,
or E-mail information given above.

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GE MDS, LLC

175 Science Parkway

Rochester, NY 14620

General Business: [phone]

FAX: [phone]

Web: www.gemds.com

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