EF Johnson 2422001 User Manual

VIKING® VX
VHF LTR
25W-110W Repeater

Part No. 242-20X1-213

First Printing
August 2000

PRELIMINARY

1-1

October 1995

Part No. 001-2008-202

October 1995
Part No. 001-2008-202

1-2

VIKING® VX

VHF LTR REPEATER

PART NO. 242-20X1-213

Copyright 2000 by the E.F. Johnson Company

The E.F. Johnson Company designs and manufactures two-way radio equipment to serve a wide variety of communications
needs. Johnson produces equipment for the mobile telephone and land mobile radio services which include business, indus­trial, government, public safety, and personal users.

LAND MOBILE PRODUCT WARRANTY

The manufacturer’s warranty statement for this product is available from your product supplier or from the E.F. Johnson Com­pany, 299 Johnson Avenue, Box 1249, Waseca, MN 56093-0514. Phone [phone].

WARNING

This device complies with Part 15 of the FCC rules. Operation is subject to the condition that this device does not cause harm­ful interference. In addition, changes or modification to this equipment not expressly approved by E. F. Johnson could void
the user’s authority to operate this equipment (FCC rules, 47CFR Part 15.19).

DO NOT allow the antenna to touch or come in very close proximity with the eyes, face, or any exposed body parts while the
radio is transmitting.

To comply with FCC RF exposure limits, DO NOT operate the transmitter of a stationary radio (base station or marine radio)
when a person is within four (4) meters of the antenna.

DO NOT operate the radio in explosive or flammable atmospheres. The transmitted radio energy could trigger blasting caps or
cause an explosion.

DO NOT operate the radio without the proper antenna installed.

DO NOT allow children to operate transmitter equipped radio equipment.

NOTE: The above warning list is not intended to include all hazards that may be encountered when using this radio.

SAFETY INFORMATION

The FCC has adopted a safety standard for human exposure to RF energy. Proper operation of this radio under normal
conditions results in user exposure to RF energy below the Occupational Safety and Health Act and Federal Communi cat ion
Commission limits.

The information in this document is subject to change without notice.

E.F. Johnson Company will not be liable for any misunderstanding due to misinformation or errors found in this
document.

L TR, LTR-Net, Multi-Net, Viking Head/EFJohnson Logo, Call Guard and SUMMIT are registered trademarks of E.F . Johnson
Company All other company and/or product names used in this manual are trademarks and/or registered trademarks of their
respective manufacturer.

October 1995

1-3

Part No. 001-2008-202

FCC EXPOSURE LIMITS

This fixed station radio transceiver was tested by the manufacturer with an appropriate antenna in order to verify compliance
with Maximum Permissible Exposure (MPE) limits set under Section 2.1091 of the FCC Rules and Regulations. The guide­lines used in the evaluation are derived from T able 1 (B) titled “Limits For General Population/Uncontrolled Exposure” which
is from FCC report OET bulletin #65.

Table 1 (B)

FCC Limits for Maximum Permissible Exposure (MPE)

(B) Limits For General Population/Uncontrolled Exposure

Frequency Range (MHz)

0.3 - 1.34 614 1.63 (100)*

1.34 - 30 824/f 2.19/f (180/f
30 - 300 27.5 0.073 0.2
300 - 1500 -- -- f/1500
1500 - 100,000 -- -- 1.0
f = Frequency in MHz *Plane-wave equivalent power density.

Table 2 lists the antennas recommended for use in the VHF frequency range. Each model of this radio was tested with the
appropriate antenna listed. The antenna shall be mounted to a tower and be a minimum of 10 meters above the ground at the
lowest point on the antenna. The radio manufacturer has determined that the user and service personnel should remain four (4)
meters in distance away from the antenna when transmitting. By maintaining this distance, these individuals are not exposed to
radio frequency energy or magnetic fields in excess of the guidelines set forth in Table 1 (B).

NOTE: Other antennas or installation configurations that have not been tested may not comply with FCC RF exposure limits
and therefore are not recommended.

Electric Field Strength

(E) (V/m)

Magnetic Field Strength

(H) (A/m)

Power Density

(S) (mW/cm

2

)*

2

)

Table 2

Recommended Antennas

(Antenna Manufacturer - Decibel Products)

October 1995
Part No. 001-2008-202

Frequency Antenna Model No.

132-144 MHz DB205E
144-178 MHz DB205F

1-4

TABLE OF CONTENTS

1 INTRODUCTION AND OPERATION

1.1 SCOPE OF MANUAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

1.2 REPEATER DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

1.3 REPEATER IDENTIFICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

1.4 MODEL NUMBER BREAKDOWN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

1.5 ACCESSORIES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

1.6 PRODUCT WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

1.7 FACTORY CUSTOMER SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

1.8 FACTORY RETURNS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

1.9 REPLACEMENT PARTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

1.10 SOFTWARE UPDATES/REVISIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

1.11 REPEATER OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

MAIN PROCESSOR CARD (MPC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

MAIN AUDIO CARD (MAC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

INTERFACE ALARM CARD (IAC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

1.12 REPEATER INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

HOME REPEATERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

INTER-REPEATER DATA COMMUNICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

MOBILE TRANSCEIVERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

1.13 REPEATER DATA BUS SIGNALING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

MOBILE DATA MESSAGE ORDER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

ID VALIDATOR OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

2 INSTALLATION

2.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

SITE PREPARATION AND ANTENNA INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

2.2 ENVIRONMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

2.3 VENTILATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1

2.4 AC POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2

2.5 BATTERY BACKUP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2

2.6 800W POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2

AC INPUT REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2.7 GROUNDING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4

PROTECTION GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2.8 UNPACKING AND INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5

2.9 REPEATER DATA BUS INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-6

MPC DATA BUS SWITCH SETTINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

MPC DATA BUS JUMPER SETTINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2.10 CONNECTING RECEIVE AND TRANSMIT ANTENNAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7

3 SOFTWARE

3.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

HOW TO USE THIS MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

GETTING STARTED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

COMPUTER DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

EEPROM DATA STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

COMMAND LINE OPTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

COLOR OR MONOCHROME OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

1

TABLE OF CONTENTS (CONT.)

3.2 REPEATER PROGRAM SOFTWARE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

INSTALLING THE SOFTWARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

MINIMUM FREE MEMORY REQUIRED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3.3 REPEATER PROGRAMMER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

PROGRAM FILES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3.4 ALIGNMENT SOFTWARE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3.5 HELP F1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

4 PULL DOWN MENUS

4.1 MENU DISPLAYS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4.2 FILE MENU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

LOAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

SAVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

SAVE AS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

NEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

PRINT REPEATER CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

DOS SHELL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

QUIT (ALT X) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4.3 EDIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

SETUP PARAMETERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

SELECT REPEATER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

ALARM CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

REPEATER TYPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

DELETE REPEATER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

TELEPHONE PARAMETERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

4.4 TRANSFER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

WRITE SETUP PARAMETERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

READ SETUP PARAMETERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

4.5 HARDWARE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

HSDB MONITOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

RECEIVE/TRANSMIT DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

RF DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

REVISION/VERSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

MODE SELECT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

4.6 TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

POWER AMPLIFIER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

RECEIVER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

EXCITER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

FULL REPEATER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

4.7 UTILITIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

COM PORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

DISPLAY MODE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

USER LEVEL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

5 REPEATER PROGRAMMING

5.1 CREATING A NEW FILE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

SELECT REPEATER TO EDIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5.2 ADDING A REPEATER TO A FILE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

2

TABLE OF CONTENTS (CONT.)

6 CIRCUIT DESCRIPTION

6.1 RECEIVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

REGULATED VOLTAGE SUPPLIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

HELICAL FILTERS, RF AMPLIFIER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

12.5 kHz IF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

25 kHz IF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

VCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

ACTIVE FILTER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4

BUFFER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

SYNTHESIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

BUFFER AMPLIFIER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

LOCK DETECT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

CHARGE PUMP, LOOP FILTER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

VOLTAGE MULTIPLIER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

BUFFER AMPLIFIER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

FIRST AND SECOND INJECTION AMPLIFIERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

6.2 EXCITER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8

VCO (A007). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

VCO BUFFER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

VCO/TCXO FREQUENCY MODULATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8

SYNTHESIZER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9

BUFFER AMPLIFIER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10

BUFFER AMPLIFIER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10

LOCK DETECT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10

CHARGE PUMP, LOOP FILTER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11

BUFFER AMPLIFIER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11

RF AMPLIFIERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11

6.3 110W POWER AMPLIFIER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-11

AMPLIFIER/PREDRIVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11

DRIVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11

FINAL AMPLIFIERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12

POWER DETECTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12

THERMAL SENSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12

FORWARD/REVERSE POWER DETECT, CIRCULATOR, LOW-PASS FILTER . . . . . . . . . . . . . . . . . . . . . . . 6-12

6.4 RF INTERFACE BOARD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-13

POWER CONNECTOR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13

SIGNAL CONNECTOR (J101). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13

FAN CONNECTOR (J104) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15

POWER AMPLIFIER CONNECTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15

EXCITER CONNECTOR (J102). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16

RECEIVER CONNECTOR (J103) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17

6.5 800W POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-20

FILTER BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20

POWER FACTOR CORRECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20

MAIN PULSE WIDTH MODULATOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20

SYNCHRONIZING CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-22

FAN AND THERMAL SHUTDOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-22

+15V CONVERTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23

+5V CONVERTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23

-5V CONVERTER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23

POWER SUPPLY REPAIR AND ALIGNMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23

3

TABLE OF CONTENTS (CONT.)

6.6 BATTERY BACK-UP MODULE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24

CHARGER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24

REVERSE BATTERY PROTECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25

ENGAGING THE RELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25

OVER/UNDERVOLTAGE SHUTDOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25

BBM FAN CONTROL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26

6.7 CARD RACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26

6.9 EXTERNAL CONNECTOR BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27

6.10 MAIN PROCESSOR CARD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28

MAIN CONTROLLER MICROPROCESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-29

HIGH SPEED DATA BUS MICROPROCESSOR (U13). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-29

CHIP SELECT DECODERS (U15/U4). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-30

P1 SIGNAL CONNECTOR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-30

J1 COMPUTER CONNECTOR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-31

J2 MEMORY SELECT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-31

J3 BAUD RATE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-31

S2/S3 HSDB SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-31

J4 EPROM MEMORY LOADING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-31

J5 HSDB SPEED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-31

J6 WATCHDOG. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-31

6.11 MAIN AUDIO CARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-32

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-32

AUDIO/DATA MICROPROCESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-32

RECEIVE AUDIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-32

RECEIVE SQUELCH CIRCUITRY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-33

RECEIVE DATA CIRCUITRY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-33

RECEIVE AUDIO PROCESSING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-33

VOTER AUDIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-34

COMPANDOR OPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-34

TRANSMIT AUDIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-34

TRANSMIT AUDIO PROCESSING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-34

TRANSMIT DATA AND CWID PROCESSING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-35

P101 SIGNALING CONNECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-35

P100 EXTERNAL OUTPUTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-36

J100 A D LEVEL TEST POINT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-37

J101 SPEAKER/MICROPHONE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-37

J102 LOCAL MICROPHONE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-37

J103 GROUND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-37

J104 EXTERNAL SPEAKER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-37

J105 WATCH DOG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-37

J106 TX DATA PATH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-37

A301 COMPANDOR CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-37

6.12 INTERFACE ALARM CARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-38

RELAY OUTPUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-38

ISOLATED INPUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-38

ALARM INDICATORS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-39

ALARM FUNCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-39

P500 SIGNALING CONNECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-40

P501 EXTERNAL OUTPUTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-41

J500 A D LEVEL TEST POINT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-43

J501 GROUND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-43

J502 +15V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-43

POWER SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-43

J505 SQUELCH ENABLE OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-43

4

TABLE OF CONTENTS (CONT.)

7 ALIGNMENT AND TEST PROCEDURES

7.1 RECEIVER ALIGNMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1

PRETEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

VOLTAGE MEASUREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

PROGRAM TUNE-UP CHANNEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

RECEIVER FREQUENCY ADJUST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

VCO TEST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

FRONT END ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

AUDIO DISTORTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3

7.2 EXCITER ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-4

PRETEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

VOLTAGE MEASUREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

PROGRAM TUNE-UP CHANNEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

VCO TEST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5

TCXO FREQUENCY ADJUST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5

TRANSMIT MODULATION ADJUST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5

7.3 110W POWER AMPLIFIER ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-6

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

DRIVER TUNING AND LIMIT ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

POWER AMPLIFIER TUNING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6

7.4 FULL REPEATER ALIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-11

PERFORMANCE TEST PROGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11

REPEATER SETUP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11

TRANSMITTER TEST/ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11

RECEIVER TESTS/ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11

TRANSMIT AUDIO/DATA LEVEL ADJUSTMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-13

VOTER AUDIO LEVEL ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-15

AUDIO/DATA LEVEL ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-15

REPEATER OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-16

8 SERVICING

8.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1

PERIODIC CHECKS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

SURFACE-MOUNTED COMPONENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

TCXO MODULES NOT SERVICEABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

8.2 SYNTHESIZER SERVICING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-1

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

TCXO MODULE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

VOLTAGE CONTROLLED OSCILLATOR (VCO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

INTERNAL PRESCALER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

CALCULATING "N " AND "A " COUNTER DIVIDE NUMBERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3

8.3 RECEIVER SERVICING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3

8.4 TRANSMITTER SERVICING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3

8.5 POWER SUPPLY SERVICING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3

VOLTAGE CHECKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

8.6 CHIP COMPONENT IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-5

CERAMIC CHIP CAPACITORS (510-36xx-xxx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

TANTALUM CHIP CAPACITORS (510-26xx-xxx). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

CHIP INDUCTORS (542-9000-xxx). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

CHIP RESISTORS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5

CHIP TRANSISTORS AND DIODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7

8.7 GRAFOIL REPLACEMENT PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-7

5

TABLE OF CONTENTS (CONT.)

9 PARTS LIST

VIKING VX VHF LTR REPEATER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

110W VHF LTR REPEATER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

REPEATER ENCLOSURE ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

TRANSCEIVER MECHANICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2

CONTROLLER BACKPLANE CARD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2

EXTERNAL CONNECTOR BOARD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3

POWER SUPPLY FILTER BOARD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3

RF INTERFACE BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3

REPEATER RX./EX MODULE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5

RECEIVER VCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6

12.5/25 kHz RECEIVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6

TRANSMIT VCO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-10

EXCITER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-11

110W POWER AMPLIFIER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-13

LOW-PASS FILTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-15

FORWARD/REVERSE POWER DETECTOR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-15

POWER AMPLIFIER MECHANICAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-15

800W POWER SUPPLY MAIN BOARD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-16

AC FILTER BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-21

BATTERY BACK-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-22

THERMAL SENSOR BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-23

MAIN PROCESSOR CARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-23

MAIN AUDIO CARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-25

INTERFACE ALARM CARD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-30

10 SCHEMATICS AND COMPONENT LAYOUTS

10-1 RF MODULE INTERFACE CONNECTOR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2

10-2 BACKPLANE CABLE CONNECTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2

10-3 REPEATER CABINET EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

10-4 REPEATER REAR VIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

10-5 REPEATER FRONT VIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

10-6 INPUT/OUTPUT ALARM INTERCONNECT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4

10-7 RF INTERCONNECT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4

10-8 BACKPLANE INTERCONNECT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5

10-9 RF INTERFACE BOARD COMPONENT LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-6

10-10 RF INTERFACE BOARD SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-7

10-11 RECEIVER COMPONENT LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-8

10-12 RECEIVER VCO COMPONENT LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-10

10-13 RECEIVE VCO SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-10

10-14 RECEIVER SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-11

10-15 EXCITER COMPONENT LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-12

10-16 TRANSMIT VCO COMPONENT LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-14

10-17 TRANSMIT VCO SCHEMATIC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-14

10-18 EXCITER SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-15

10-19 110W POWER AMPLIFIER COMPONENT LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-16

10-20 110W POWER AMPLIFIER SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-17

10-21 FORWARD POWER COMPONENT LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-18

10-22 REVERSE POWER COMPONENT LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-18

10-23 FORWARD/REVERSE POWER SCHEMATIC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-19

10-24 MAIN PROCESSOR CARD COMPONENT LAYOUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-20

10-25 MAIN PROCESSOR CARD SCHEMATIC (1 OF 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-21

6

TABLE OF CONTENTS (CONT.)

10-26 MAIN PROCESSOR CARD SCHEMATIC (2 OF 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-22

10-27 MAIN AUDIO CARD COMPONENT LAYOUT (COMPONENT SIDE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-23

10-28 MAIN AUDIO CARD COMPONENT LAYOUT (OPPOSITE COMPONENT SIDE) . . . . . . . . . . . . . . . . . . . . 10-24

10-29 MAIN AUDIO CARD SCHEMATIC (1 OF 3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-25

10-30 MAIN AUDIO CARD SCHEMATIC (2 OF 3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-26

10-31 MAIN AUDIO CARD SCHEMATIC (3 OF 3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-27

10-32 INTERFACE ALARM CARD COMPONENT LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-28

10-33 INTERFACE ALARM CARD SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-29

10-34 BACKPLANE COMPONENT LAYOUT (CARD SIDE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-30

10-35 BACKPLANE COMPONENT LAYOUT (OPPOSITE CARD SIDE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-31

10-36 BACKPLANE SCHEMATIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-32

10-37 POWER SUPPLY FILTER BOARD COMPONENT LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-33

10-38 POWER SUPPLY FILTER BOARD SCHEMATIC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-33

10-39 POWER CABLE CONNECTOR AND SCHEMATIC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-34

LIST OF FIGURES

1-1 REPEATER IDENTIFICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1-2 PART NUMBER BREAKDOWN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1-3 REPEATER CARDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

2-1 BATTERY BACKUP CONNECTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2-2 TEMPERATURE SENSOR CABLE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2-3 POWER CABLE CONNECTOR AND SCHEMATIC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

2-4 RACK MOUNTED REPEATERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

2-5 5-CHANNEL COMBINING SYSTEM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

2-6 RJ-11 TO BNC MPC JUMPERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2-7 RJ-11 TO RJ-11 MPC JUMPERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2-8 ANTENNA CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2-9 RJ-11 TO BNC ADAPTER MODULE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2-10 SINGLE REPEATER INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

2-11 TWO REPEATER INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

2-12 THREE OR MORE REPEATERS INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

2-13 MIXED VIKING VX AND CR1100 REPEATER INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

3-1 REPEATER TEST MENU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

3-2 PROGRAMMING FLOWCHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

4-1 FILE MENU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4-2 LOAD FILE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4-3 SAVE FILE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4-4 EDIT PROGRAMMING FLOWCHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4-5 EDIT MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

4-6 REPEATER LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4-7 ALARM CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4-8 INPUT ALARMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4-9 OUTPUT ALARMS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

4-10 ALARM CROSS REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

4-11 REPEATER TYPE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

4-12 DELETE REPEATER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5

4-13 TRANSFER MENU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

4-14 WRITE SETUP PARAMETERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

4-15 PROGRAM WRITE SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

4-16 READ SETUP PARAMETERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

4-17 READING SETUP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

4-18 HARDWARE PROGRAMMING FLOWCHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

7

TABLE OF CONTENTS (CONT.)

4-19 HARDWARE MENU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

4-20 HSDB MONITOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

4-21 MOBILE TRAFFIC MONITOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

4-22 RF LINE MONITOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

4-23 REVISION/VERSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

4-24 REVISION/VERSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

4-25 TEST PROGRAMMING FLOWCHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

4-26 TEST MENU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

4-27 UTILITIES MENU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

4-28 COM PORT SELECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

4-29 LAPTOP INTERCONNECT CABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

4-30 COLOR MODE SELECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

5-1 SETUP PARAMETERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

6-1 12.5 kHz IF RECEIVER BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

6-2 U201/U203 BLOCK DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

6-3 25 kHz IF RECEIVER BLOCK DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

6-4 SYNTHESIZER BLOCK DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

6-5 EXCITER BLOCK DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9

6-6 110W POWER AMPLIFIER BLOCK DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12

6-7 RF INTERFACE BOARD BLOCK DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-19

6-8 BLOCK DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-21

6-9 NO LOAD CHARGE VOLTAGE vs. TEMPERATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25

6-10 BACKPLANE CONNECTORS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26

6-11 EXTERNAL CONNECTOR BOARD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27

6-12 U27 BLOCK DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28

6-13 4 I/O J1 ALARM OUTPUTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-38

6-14 4 I/O J2 ALARM OUTPUTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-38

6-15 S500-S503. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-39

6-16 ALARM EXAMPLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-39

6-17 MAIN PROCESSOR CARD BLOCK DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-45

6-18 MAIN AUDIO CARD LOGIC BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-46

6-19 MAIN AUDIO CARD AUDIO BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-47

6-20 INTERFACE ALARM CARD BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-48

7-1 RECEIVER ALIGNMENT POINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

7-2 EXCITER ALIGNMENT POINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

7-3 110W POWER AMPLIFIER ALIGNMENT POINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7

7-4 RF INTERFACE BOARD ALIGNMENT POINTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7

7-5 POWER EXTENDER CABLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7

7-6 RECEIVER TEST SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8

7-7 EXCITER TEST SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9

7-8 110W POWER AMPLIFIER TEST SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10

7-9 S100 SETTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-15

7-10 NEW HSDB SWITCH SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-16

7-11 J2 TERMINAL BLOCK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-16

7-12 MAC ALIGNMENT POINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-17

7-13 MAIN PROCESSOR CARD ALIGNMENT POINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-18

7-14 INTERFACE ALARM CARD ALIGNMENT POINTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-19

8-1 LOCK DETECT WAVEFORM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

8-2 MODULUS CONTROL WAVEFORM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

8-3 POWER SUPPLY REAR VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

8-4 POWER SUPPLY FRONT VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4

8-5 3-DIGIT RESISTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6

8

TABLE OF CONTENTS (CONT.)

1-1 REPEATER ACCESSORIES 1-2
1-2 ACTIVE REPEATER ALARMS 1-5
2-1 OUTPUT VOLTAGES 2-3
2-2 OVER VOLTAGE 2-3
5-1 REPEATER SETUP PARAMETERS 5-2
8-1 CERAMIC CHIP CAP IDENTIFICATION 8-6
8-2 CHIP INDUCTOR IDENTIFICATION 8-7

LIST OF TABLES

9

TABLE OF CONTENTS (CONT.)

10

INTRODUCTION AND OPERATION

SECTION 1 INTRODUCTION AND OPERATION

1.1 SCOPE OF MANUAL

This service manual provides installation, opera­tion, programming, service, and alignment informa­tion for the VIKING



VX LTR Repeater, Part No.

242-20X1-213.

1.2 REPEATER DESCRIPTION

The VIKING VX repeater is designed for opera­tion in a Johnson LTR system. It operates on the VHF
channels from 132-178 MHz. Channel spacing is

12.5/25 kHz and RF power output is adjustable from
25 to 125 watts.

This repeater is modular in design for ease of ser­vice. There are separate assemblies for the logic
cards, receiver

, exciter, power amp lifier and power

supply sections.

This repeater is progr ammed wit h a l apt op or per ­sonal computer using the 2000 Series Programmer
software, Part No. 023-9998-390.

1.4 MODEL NUMBER BREAKDOWN

The following breakdown shows the part num-

ber scheme used for the Viking VX.

3242- 2 0 X 1 -

1

2

1 = 132-150 MHz
3 = 150-174 MHz

VHF

25-110W

12.5/25 kHz

LTR

Figure 1-2 PART NUMBER BREAKDOWN

1.5 ACCESSORIES

The accessories available for the Viking VX LTR
repeater are listed in Table 1-1. A brief description of
some of these accessories follows.

2-Wire Telephone Interconnect Card (TIC) - This
card provides an interface between the Repeater and a
phone line to permit telephone calls to be placed to
and from mobile transceivers.

The VIKING VX repeater i nte rf ace s wit h a MPC
(Main Processor Card) and MAC (Main Audio Card)
to provide LTR operation. All signal ports used to
interface to the Repeater are on J2 located at the back
of the cabinet.

1.3 REPEATER IDENTIFICATION

The repeater identi ficati on number is pri nted on a
label that is affixed to the inside of the repeater cabi­net. The following infor mation is contained in that
number:

Repeater

ID

20X4X

Revision

Letter

Manufacture

Date

Week Year A= Waseca

WarrantyPlant

Number

12345A324A

Figure 1-1 REPEATER IDENTIFICATION

LTR System ID Validator - If an invalid ID is
detected on the repeater data bus, the audio of the
mobile receiving the ca ll is disabled.

2000 Series Service Kit - This kit contains an alarm
wire harness, extender power cable, programming kit,
extender card, ex tender harne ss, and a TIC bi as cab le.
These items are used when tuning the repeater and
while troubleshooting.

Battery Backup and Cable Option - This option can
be factory or field installed (refer to installation
instructions 004-2000-830). It includes the battery
backup module that resides in the power supply and
the necessary interconnect cabling to connect the
repeater to the batterie s (see Section 2.5).

RJ-11 to 6-BNC Adapter - This adapter box pro­vides connections for the high speed data bus at the
rear of the repeater and the data bus from the logic
drawers in existing repeater syste m s.

1-1

August 2000

Part No. 001-2001-200

INTRODUCTION AND OPERATION

Table 1-1 REPEATER ACCESSORIES

Accessory Part No.

2-Wire Telephone Interconnect Card 023-2000-370
LTR System ID Validator 023-4408-500
2000 Series Service Kit
Battery Backup option and cable 023-2000-835
RJ-11 to 6-BNC Adapter
3’ RG-58 coax w/male BNC for HSDB 023-4406-5 05
6’ RG-58 coax w/male BNC for HSDB 597-3001-2 14
Custom Frequency Prog rammin g & Set up 023-2000-100
PC programmer PGMR 2000 software 023-9998-390
Service Microphonee 589-0015-011
50 ohm Termination HSDB 023-4406-504
Programming cable kit
Extender Card 023-2000-230
Extender cable kit, 7 ft. 250-2000-010

1

Includes: extender card, extender cables, TIC bias cable

and programming cable kit (PN 023-2000-195).

2

Required when using Viking Networking products, one
per station.
3 Included in 2000 Series Service Kit (PN250-2000-230).

1

2

3

250-2000-230

023-2000-194

023-2000-195

1.7 FACTORY CUSTOMER SERVICE

The Custom er Service Department of the E.F.
Johnson Company provides customer assistance on
technical problems and the availability of local and
factory repair facilities. Customer Service hours are
7:30 a.m. - 4:30 p.m. Central Time, Monday - Fri­day. There is also a 24-hour emergency technical sup­port telephone number. From within the continental
United States , the Customer Service Department can
be reached toll-free at:

1-800-328-3911

When your call is answered at the E.F. Johnson
Company, you will hear a brief messa ge informing
you of numbers that can be entered to reach various
departments. This number may be entered during or
after the message using a tone-type telephone. If you
have a pulse-type telephone, wait until the message is
finished and an operator will come on the li ne t o assist
you. When you enter a first number of "1" or "2",
another num ber is requested to further categorize the
type of information. You may also enter the 4-digit
extension number of the per son th at you want to reach.

PC Programmer PGMR Software - 3.5" program­ming disk used to program the repeater.

Programming Cable Ki t - This kit connects the MPC
and a computer during programming and for monitor­ing repeater activity at the site.

Extender Card - Used to exte nd the cards plugged into
the backplane beyond the card rack enclosure when
tuning the repeater and while troubleshooting.

Extender Cable Kit - These are seven foot extension
cables for the RF T ransceiver power and data, when the
transceiver is removed from the cabinet.

1.6 PRODUCT WARRANTY

The warranty statement is available from your
product supplier or from the Warranty Department,
E.F. Johnson Company, 299 Johnson Avenue, Box
1249, Waseca, MN 56093- 0514. This information
may also be requested by phone from the Warranty
Department. The Warranty Department may also be
contacted for Warranty Service Reports, claim forms,
or any questions with warranties or warranty service
by dialing [phone].

August 2000
Part No. 001-2001-200

FAX Machine - Sales [phone]
FAX Machine - Cust Serv [phone]

If you are calling from outside the continental
United States, the Customer Service telephone num­bers are as follows:

Customer Service Department - [phone]
Customer Service FAX Machine - [phone]

You may also contact the Customer Service
Department by mail. Please include all information
that may be helpful in solving your problem. The
mailing address is as follows:

E.F. Johnson Company
Customer Service Department
299 Johnson Avenue
P.O. Box 1249
Waseca, MN 56093-0514

1.8 FACTORY RETURNS

Repair service is normal ly availab le through local
authorized E.F. Johnson Land Mobile Radio Service
Centers. If local service is not avail able, the equipment

1-2

INTRODUCTION AND OPERATION

can be returned to the factory for repair. However, it is
recommended that you contact the Field Service
Department before retu rning equip ment. A servic e
representative may be able to suggest a solution to the
problem so that return of the equipment would not be
necessary.

Be sure to fill out a Factor y Repair Req uest For m
#271 for each unit to be repaired, whether it is in or
out of warr anty. These forms are available free of
charge by calling the r epa ir lab ( see Sect ion 1.7) or by
requesting them when you send a unit in for repair.
Clearly describe the difficulty experienced in the
space provided and also note any prior physical dam­age to the equipment. Then include a form in the ship­ping container with each u nit . Your phone number and
contact name are very important because there are
times when the technicians have specific questions
that need to b e answered in order to completely iden­tify and repair a problem.

When returning equipment for repair, it is also a
good idea to use a PO number or some other re fe rence
number on your paperwork in case you need to call
the repair lab about your unit. These numbers are ref­erenced on the repair order and it makes it easier and
faster to locate your unit.

Return Authorization (RA) numbers are not nec­essary unless you have been given one by the Field
Service Department. They require RA numbers for
exchange units or if they want to be aware of a spe­cific problem. If you have been given an RA number,
reference this number on the Factory Repair Request
Form sent with the unit. The repair lab will then con­tact the Field Service Department when the unit
arrives.

You may also send your order by mail or FAX.
The mailing address is as follows and the FAX num­ber is shown in Section 1.7.

E.F. Johnson Company
Service Parts Department
299 Johnson Avenue
P.O. Box 1249
Waseca, MN 56093-0514

1.10 SOFTW ARE UPDATES/REVISIONS

All inquiries concerning updated software, its
installation and revisions should be directed to the
Customer Service Department (see Section 1.7).

1.1 1 REPEATER OPERATION

1.11.1 MAIN PROCESSOR CARD (MPC)

Refer to Figure 1-3.

Programming Jack

J1 provides input connection from the computer
and the "flash memory" in the MPC. The program­ming information in an IBM



PC programs the MPC
directly from the serial card through an interconnect
cable to the COM1 or COM2 port.

Reset

S1 provides a manual res et of the Mai n Pro cessor
Card (MPC). A manual reset causes a complete
power-up restart.

Display and LEDs

1.9 REPLACEMENT P ARTS

E.F. Johnson replacement parts can be ordered
directly from the Service Parts Department. To order
parts by phone, dial the toll-free number and then
enter "1" as described in Section 1.7. When ordering,
please supply the part number and quantity of each
part ordered. E.F. Johnson dealers also need to give
their account number.

If there is uncertainty about the part number,
include the designator (C112, for example) and the
model number of the equipment the part is from (refer
to Section 1.4).

Each combination of DS1 display read-out and
CR4/CR5 indication refers to an active alarm. See
Ta ble 1-2 for alarms and definitions. LED indica­tions: CR1 is blinking; MPC is operational, CR2 on;
380-470 MHz, off is 475-520 MHz and CR5 on; indi­cates an LTR Repeater.

RF Thermal Sense Alarm Condition Exists

NOTE: Safety measures are disabled

Ok

August 2000

1-3

Part No. 001-2001-200

INTRODUCTION AND OPERATION

Alarms

When the Repeater is in Test mode the safety
measures are disabled. Therefore, if the Repeater is
keyed for an extended period and the power amplifier
temperature increa se, thermal shutdown will not occur .
There are pop-up windows that appear in the Test
mode screens to alert the user that there is an alarm
and action should be taken. Refer to Figure 1-3 for an
example of this type of alarm.

S1

RF INTERFACE

BOARD

PROG
JACK

RESET

DS1

GND

GRN

CR1

YEL

CR2

YEL

CR5

RED

CR4

RED

CR3

J1

J103

J100

A D

LEVEL

LOCAL

ON/OFF/VOL

R236

MIC

J102

SPKR

J101
J104

EXT SPKR

+15V

+15V ACC

-5V

+5V

CWID
HANG
SWITCH
MOBILE
XMIT

J500

TP

J501

GND

J502

+15V

S508

IACMACMPC

PA

EXCITER/RECEIVER

Figure 1-3 REPEATER CARDS

August 2000
Part No. 001-2001-200

1-4

INTRODUCTION AND OPERATION

Table 1-2 ACTIVE REPEATER ALARMS

Alarm No. DS1 CR3 CR4 Definition

Test Mode
IAC input 1 Active
IAC input 2 Active
IAC input 3 Active
IAC input 4 Active
MAC Processor Alarm
HSDB Processor/Cable Alarm
IRDB Cable Alarm
Switch (RNT)/CIM Channel Problem Alarm
TIC Processor Alarm
MMC Processor Alarm
VNC Alarm
AC Power Failure
Battery Power Failure
Power supply thermal sense
Fan 1 current out of specification
Fan 2 current out of specification
IAC mismatch
RF shutdown
RF Half Power Mode
Thermal sense in RF portion
RF Finals 1-2 power out fai lure
RF Finals 3-4 power out fai lure
RF VSWR Failure
Normal Synthesizer Tx Lock failure
Normal Synthesizer Rx Lock failure
HS Synthesi zer Tx Lock failure
HS Synthesizer Rx Lock failure
RF Quarter Power Alarm

10
11
12
13
14
15
16
17
18
19
20
21
32
33
34
35
36
37
38
39
40
41
42

0
1
2
3
4
9

0
1
2
3
4

9
A
B
C
D
E

F

0

1

2

3

4

5

0

1

2

3

4

5

6

7

8

9
A

Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off

On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On

On
On
On
On
On
On
On
On
On
On
On

On
Off
Off
Off
Off
Off
Off

On

On

On

On

On

On

On

On

On

On

On

1-5

August 2000

Part No. 001-2001-200

INTRODUCTION AND OPERATION

1.11.2 MAIN AUDIO CARD (MAC)

Refer to Figure 1-3.

External Speaker Jack

J104 provides repeater audio output to an exter nal
speaker. The local volume control adjusts the volume
level of this speaker.

Speaker/Microphone Jacks

J102 provides audio input from a microphone.
J101 provides the receive audio to the microphone.

Local On/Off/Volume Control

R236 provides control o f the rec eive a udio ou tput
to J101 and J104. Turning this control clockwise past
the detent applies voltage to the local audio amplifier.

A D Level Test Point

J100 provides audio/data level output for test
level checks.

Power Supply On/Off Switch

S508 turns the power supply DC voltages on and

off from the IAC in the front of the repeater.

Power Indicator

CR501 indicates the +5V supply is at normal
level and applied to the IAC. CR524 indicates -5V
supply is at normal level and applied to the IAC.
CR523 indicates the +15V accessory supply is at nor­mal level. CR525 indicates that the +15V supply is at
normal level and applied to the IAC.

CWID Indicator

Indicates that the CW Identification is being
transmitted on the lowest-frequency repeater. The
CWID is a continuous-wave (CW) transmission of the
station call letters in Morse Code to satisfy the station
identification re quirement. The CWID is programmed
into the repeater memory. This indicator also is used
when an alarm is transmitted with Mor se code.

Hang Indicator

Ground

J103 is connected to ground for test equipment

when monitoring test point J100.

1.11.3 INTERFACE ALARM CARD (IAC)

Refer to Figure 1-3.

Voltage Test Output

J502 provides a +15V test point on the IAC.

Ground

J501 is connected to ground for test equipment

when monitoring voltage test point J502.

A D Level Test Point

J500 provides a test point to monitor audio and

data levels, AC fail and the rmal sensor.

Indicates that the hang word is being transmitted
by the repeater. This word is transmitted on calls in
which the channel is held for the duration of the call
and not just for the duration of the transmission. The
hang word tells the mobiles to stay on the same chan­nel and not re-access the system when responding to a
call.

Switch Call Indicator

Not used in th e LTR repeater.

Mobile Call Indicator

Mobile-to-repeater transmission in progress is
indicated by the Mobile Call Indicator.

Xmit Indicator

This indicates that the repeater transm itter is
keyed by the logic.

August 2000
Part No. 001-2001-200

1-6

INTRODUCTION AND OPERATION

1.11.4 POWER SUPPLY

The power supply is sealed and the line and sup­ply fuses are inside. If a supply fuse opens, the power
supply must be removed and opened for repair (see
Section 2.4 and 8.5). Refer to the power supply ser­vice manual 004-2000-810.

Standby Battery Jack

This provides a connection point for a +24V DC
standby battery. Current is drawn from the battery
only when the power supply output voltage is lower
than the battery voltage. A trickle charge switch on
the supply ensures that the battery is fully charged.
Disable this switch when a separate battery charger is
used (see Section 2.5).

1.12 REPEATER INFORMATION

1.12.1 INTRODUCTION

NOTE: The VIKING VX does not require a separate
LTR logic drawer.

The repeater model used in an LTR system is
determined by freque ncy range. 800 MHz s ystems use
the VIKING VX (2008-232/-234) or LTR 8000s, UHF
use 20x4-232/-234 or 1010s, and VHF use 2011/2031­213 or 110 0s. Repeat ers ope rate on a singl e fre quen cy
(one repeater is required for each channel). The MPC
in each repeater performs all control and signaling
functions on that channel. Information is exchanged
between repeaters via a high-speed data bus (modular
cable). No system controller is required.

it is always monitoring its Home repea ter to deter­mine which channel is free and if it is being called by
another mobile.

The Home repeater is always used to make a call
unless it is busy . When the Home repeater is busy, any
other repeater in the site may then be used. Up to 250
ID codes are assigned to each repeater. An ID code
and Home repeater number are the "address" of the
mobiles in the system. Therefore, up to 1250 separate
addresses can be assigned in a 5-repeater system and
up to 5000 can be assigned in a 20-repeater system.
An ID code may be assigned to an individual mobile
or a group of mobiles as required.

1.12.3 INTER-REPEATER DATA COMMUNICA-

TION

Data communication between VIKING VX and
LTR repeaters at a site is via a high-speed data bus.
This bus cable is installe d in a daisy-chain manner
between repeaters. If both VIKING VX and LTR
repeaters are located a t a site, 20 rep eaters can be
interconnected. Refer to Section 2.8 for information
on connecting the data bus.

1.12.4 MOBILE TRANSCEIVERS

The mobile and handheld transceivers used in an
LTR system must be compatible with the type of sig­naling in use and also the frequency range.

1.13 REPEATER DATA BUS SIGNALING

1.13.1 GENERAL

Optional ac cessories, such as the Telephone Inter­connect Card (TIC) can be inst alled in the repeater and
the ID V alidator drawer can be installed in the repeater
rack. Refer to Johnson LTR ID Validator Manual, Part
No. 001-4408-501 and Johnson Telephone Intercon­nect Card Manual, Part No. 004-2000-3 70 for det ail ed
information.

1.12.2 HOME REPEATERS

All mobiles have one of the site repeaters
assigned as its "Home" repeater. This is the repeater
from which it receives mo st of its contr ol informa­tion. When a mobile is not placing or receiving a call,

A single-line serial data bus interconnects the
logic units of all the LTR repeaters at the site. The
first repeater powered on generates the synchroniza­tion pulse that is used by all other repeaters to deter­mine their time sl ot o n the data bus. If al l r epe aters are
powered on at the same time, the lowest numbered
repeater generates the synchronization pulse. There
are 21 slots with 1-20 used for repeater reporting and
21 used by the ID Validator (see Section 1.13.3). The
time slot used by a repeater is determined by the num­ber assigned to that repeater by the programming in
the MPC. Repeater 1 uses time slot 1, repeater 5 uses
time slot 5 , and so on. The data rate on the repeater
data bus is 18,750 bits per second.

August 2000

1-7

Part No. 001-2001-200

INTRODUCTION AND OPERATION

In its time slot, each repeater places information
on the data bus indica ting its sta tus. If a repea ter i s not
busy, only start bits appear in its slot. If a repeater is
busy, it places in its slot the Home rep eater and ID
code of the mobile receiving the cal l on that repeater.
If a repeater number is unassigned, nothing appears in
that time slot.

1.13.2 MOBILE DATA MESSAGE ORDER

Each repeater monitors all the time sl ots on the
repeater data bus. If it detects its numb er in another
time slot, it begins transmitting an additional data mes­sage to its mobiles. This message tells mobiles pro­grammed to detect that ID code to go to that repeater
to receive a call. This additional message continues
for as long as the mobile is transmitting on the other
repeater.

The sequence of data messages transmitted on a
home repeater is as follows: Every third messag e is to
the mobile currently receiving a call on that repeater.
Then alternating b etween these mess ages are messag es
to its mobiles that have been trunked to other repeat­ers. For example, assume that fivedifferent mobiles on

a five-repeater system are making calls. If all have
Repeater 1 as their home channel (not very likely in
actual practice), the data message order on Repeater 1
is as follows: 1 2 3 1 4 5 1 2 3 and so on.

1.13.3 ID VALIDATOR OPERATION

If the ID Validator is used, it is programmed wit h
the status of up to all 5000 home repeater/ID code
combinations possible with a 20-channel system.
Each combination is programmed as either valid or
invalid. Information in the twenty time slots on the
repeater data bus is monitored. If an invalid home
repeater/I D code combination is dete cted, the ID Vali­dator places in time slot 21 the number of the repeater
being used by the invali d mobile and al so the ID code.
When a repeater detects its number in slot 21, it trans­mits the tur n-off code (31) to the mobile receiving the
call. That mobile then squelches and resumes moni­toring its home channel. This effectively disables the
invalid mobile becau se it cannot ta lk to anyone. Wh en
the turn-off code is sent, the repeater places "21" in the
repeater po sition of its time slot to i ndicate to the ID
validator that turn-off has occurred.

August 2000
Part No. 001-2001-200

1-8

SPECIFICATIONS

INTRODUCTION AND OPERATION

GENERAL (Per TIA 603)

1

Frequency Ranges 132-178 MHz Transmit/Receive (132-150 MHz and 150-178 MHz)
Dimensions 9.125" H x 17" W x 20.9" D
AC Voltage/Frequency 100-240V AC/50-60 Hz
AC Current 0.38A (Standby), 1.4A (25W), 5A (110W)
AC Input Power 45W (Standby), 170W (25W), 560W (110W)
DC Current at 26.5V DC (Low Power) 6.3A (25W), 16.5A (110W)
Number of Channels 1 (Synthesized, programmable)
Channel Spacing 12.5 /15 /25 /30 kHz selectable
Channel Resolution 5 / 6.25 kHz
Temperature Range -30°C to +60°C (-22°F to +140°F)
Duty Cycle Continuous
FCC Type Acceptance ATH2422001
FCC Compliance Parts 15, 90

RECEIVER (Per TIA 603)

12 dB SINAD 0.35 µV
20 dB Quieting 0.50 µV
Signal Displacement Bandwidth ±1 kHz (12.5/15 kHz), ±2.0 kHz (25/30 kHz)
Adjacent Channel Rejection -85 dB (12.5/15 kHz), -90 dB (25/30 kHz)
Intermodulation Rejection -85 dB
Spurious & Image Rejection -100 dB
Audio Squelch Sensitivity 12 dB SINAD
Audio Response +1/-3 dB TIA
Audio Distortion Less than 3% at 0.5W/16 ohms
Local Audio Power 0.5W/16 ohms
Audio Sensitivity ±0.75 kHz (12.5/15 kHz), ±1.5 kHz (25/30 kHz)
Hum & Noise Ratio -50 dB
Frequency Spread 2 MHz
Frequency Stability ±2.5 PPM -30°C to +60°C (-22°F to +140°F)
Modulation Acceptance Bandwidth ±3.5 kHz (12.5/15 kHz), ±7.0 kHz (25/30 kHz)

TRANSMITTER (Per TIA 603)

RF Power Out 132-178 MHz 110W (Default setting), 25-110W (Variable Set Point)
Spurious Emissions -90 dBc
Harmonic Emissions -90 dBc
Audio Deviation ±1.6 kHz (12.5/15 kHz), ±3.5 kHz (25/30 kHz)
LTR Data Deviation ±0.8 kHz (12.5/15 kHz), ±1 kHz (25/30 kHz)
CWID Deviation ±1 kHz (12.5/15 kHz), ±2 kHz (25/30 kHz)
Repeat Deviation ±0.8 kHz (12.5/15 kHz), ±1.5 kHz (25/30 kHz)
Audio Response +1/-3 dB TIA
Audio Distortion Less than 2%
Hum & Noise (TIA) -50 dB (12.5/15 kHz), -55 dB (25/30 kHz)
Frequency Spread 6 MHz
Frequency Stability ±2.5 PPM -30°C to +60°C (-22°F to +140°F)
Emission Designators 11K0F3E, 16K0F3E

These general specifications are intended for reference and are subject to change without notice.
Contact the Systems Applications consultants for guaranteed or additional specifications.

August 2000

1-9

Part No. 001-2001-200

INTRODUCTION AND OPERATION

1-10

August 2000

Part No. 001-2001-200

SECTION 2 INST ALLATION

INSTALLATION

2.1 INTRODUCTION

Information in this section tells how to set up the
repeater for operat ion in an LTR system. It is assumed
that the repeater has been previously aligned at the
factory or as described in the alignment procedure in
Section 7.

Even though each repeater is thoroughly aligned
and tested at the factory, it is good practice to check
performance before it is placed in service. This
ensures that no damage occurred during shipment and
that the repeater is otherwise operating properly. Per­formance testing is described in Sections 7.1, 7.2, 7.3
and 7.4.

2.1.1 SITE PREPARATION AND ANTENNA IN-

STALLATION

Site preparation and antenna installation are not
within the scope of this manual. Basic installation
requirements are discussed in the "Dealer Guide To
Site Preparation", Part No. 004-8000-100. Factory
installation is also available. Contact your Johnson
representative for more information.

2.2 ENVIRONMENT

The following conditions should be considered
when selecting a site for the Repeater.

Operating Temperature.

-30°C to +60°C (-22°F to +140°F).

NOTE: If the Repeater is installed in an area that
exceeds these environmental conditions, the site
should be equipped with air filters to remove dust and
dirt that could cause the equipment to overheat.

When the repeaters are installed in an environ­ment that contains small airborne particles, e.g. grain
dust or salt fog, the repeater cabinets need to be
sealed. A h eat exchanger, i.e. air conditioner, is then
required to cool the cabinets. The air conditioners
must be suited for the environment. Each repeater
(110W) requires >2400 BTU/hr dissipation to main­tain exterior cabinet temperature.

2.3 VENTILATION

The RF modules and the power supply are
equipped with fans, controlled by thermostats, that
force air through the equipment for cooling. The air
flow is from the front to the back of the equipment.
This permits the Repeaters to be stacked or rack
mounted (see Figure 2-4). There are a few consider­ations when installing Repeaters to provide adequate
air circulation.

1. The Repeaters should b e mounte d with a minimum

of 6 inches clearance between the front or back of
the cabinet for air flow. The power supply requires
a minimum of 18 inches at the back of th e Repeater
for removal.

Humidity.

Less than 95% non-condensing rela ti ve humidity

at 50°C.

Air Quality.

For equipment operating in a controlled environ-

ment with the Repeaters rack mounted, the airborne
particles must not exceed 30 µg/m

3

.

For equipment operating in an uncontrolled envi-

ronment with the Repeaters rack mounted, the air­borne particles must not exceed 100 µg/m

3

.

NOTE: Repeaters should not touch. Leave a mini­mum of one empty screw hole (approximately 1/2")
between repeaters vertically especially for bottom
ventilation slots in high power repeaters.

2. Cabinet enclosures must provide air vents for ade-

quate air circulation.

3. Temperature and humidity must be considered

when several Repeaters are installed at a si te . Thi s
might require air conditioning the site.

August 2000

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Part No. 001-2001-200

INSTALLATION

2.4 AC POWER

The AC power source to the Johnson VIKING
VX Repeater can be 120V AC or 240V AC. Nothing
need be done to the power supply for 240V AC opera­tion. However, a 240V AC outlet requires that the
120V AC power plug be replaced. A locking AC
power cord is provided for the supply.

The 120V AC cord is a standa rd 3-wi re gro unde d
cord used with a standard AC wall outlet. The outlet
must be capable of supplying a minimum of 560W.
With the nominal 120V AC input, the source must
supply 5A for each 110W repeater and should be pro­tected by a c i rcuit breaker. It is recommended that all
of the repeaters in a rack should not be on the same
breaker in order to provi de one operational repeat er in
the event a breaker trips. An AC surge protector is
recommended for all equipment.

CHARGER

ACTIVE
SWITCH

CHARGER

ON

BATTERY

FAULT

EARTH

GROUND

LINE

REVERSE
BATTERY

NEUTRAL

B- B+ TEMP

Figure 2-1 BATTERY BACKUP CONNECTOR

The temperature sensor is required to adjust the

charging voltage over temperature.

Each Repeater requires an outlet, so for a 5-chan­nel system, a minimum of 5 outlets is required. An
additional three outlets should be added for test equip­ment. The outlets must be within 3 feet of each
Repeater cabinet. Future system expansion should be
considered when electrical work is being planned for
the initial system.

The VIKING VX Repeater power supply can be
equipped with an optional 24V DC back-up in the
event of AC p ower failure . Since the transmitter will
remain on full power, if desired, the DC power source
must have a current capabil ity of abo ut 20 A per 1 1 0W
repeater or 100A for 5 - 110W repeaters. The multi­coupler requires another 0.5A for a total system
requirement at 24V DC of 100.5A for 110W repeaters.

2.5 BATTERY BACKUP

If the power supply is equipped with battery
backup, screw lugs are provided on the front of the
power supply for battery co nnections ( see Figure 2-1).
A switch is provi ded fo r charging the battery or can be
off if a separate battery charger is used. A battery
temperature sensor connection is also provided. The
temperature sensor cabl e is shown in Fi gure 2-2. LED
indicators are provided to show Reverse Battery con­nection, Charger On/Off and Battery Fault.

TEMP

NEGATIVE

BATTERY

TERMINAL

WHT

BLK

GND

Figure 2-2 TEMPERATURE SENSOR CABLE

2.6 800W POWER SUPPLY

The power supply has four voltage output levels
(see Table 2-1). Each voltage is set to ±1% at +25°C
(+77°F). The output of this supply is capable or run­ning any 2000 series repeater.

Each output is overload protected such that the
power supply current limits and automatically resets
when the overload is removed (see Table 2-1).

Each output is over voltage protected such that
the power supply shuts down when an over voltage
condition exists, usually when a component in the
supply has failed (see Table 2-2). The power supply
must be manually res et by toggling the Ena ble Li ne or
removing A C power for more than 10 seconds.

August 2000
Part No. 001-2001-200

2-2

INSTALLATION

BACKPLANE

4

1

52

36

J2

A

2

4

1

3

5

B

6

7
8

9

10

7

11

8

12

9

C

J2

A

B

C

1

2

3

4

5

6

7

8

9

10

11

12

POWER HA R NESS

+26.5V

GROUND

+15V

AC FAIL IN

POWER SWITCH

THERMAL SENSOR

N/C

+15V

N/C

N/C

+5V

-5V

TO

RFIB

2

1

4

5

REPEATER

3

BACKPLANE

9

6

8

7

TO

Figure 2-3 POWER CABLE CONNECTOR AND SCHEMATIC

Table 2-1 OUTPUT VOLTAGES

Voltage Current Wattage

+26.5V 22A 583W

+15V 5A 75W

+5.2V 5A 26W

-5V 1A 5W

Table 2-2 OVER VOLTAGE

Voltage Range

+26.5V +32V to +33V

+15V +16V to +18V

+5.2V +6V to +7V

-5V -6V to -7V

2.6.1 AC INPUT REQUIREMENTS

AC Input Voltage: 100-240V AC
Line Frequency: 50-60 Hz
AC In-rush: 60A maximum
Overall Efficiency: >70% at 100V AC

>80% at 240V AC
Lightning protection: 6kV for < 1ms
Power Factor: >0.97 at full load
Brown Out Voltage: 80V AC
Temperature -30°C - +60°C (full power)

Power factor correction per IEC555. The Power
supply has the following safety agency approvals
pending: UL1950, CSA22.2-950, TUV EN60950
(IEC950)

When the AC input voltage is below 90V AC, the
maximum output power is decreased t o keep the input
current constant. If a battery back-up is installed, the
batteries take over when the AC input voltage falls
below 80V AC (dependant on power output).

The AC input connector is an IEC connector
equipped with a locking mechanism.

2-3

August 2000

Part No. 001-2001-200

INSTALLATION

The operating temperature range is -30°C to
+60°C (-22°F to +140°F), i.e. the same as the repeater.
The fan is thermostatically controlled by the internal
temperature. When the internal heatsink temperature
reaches +45°C (113°F) the fan turns on. When the
heatsink temperature drops below +35°C (95°F) the
fan turns off. If the internal heatsink temperature
reaches +90°C (+194°F) the power supply turns off
until the heatsink temperature drops below +85°C
(+185°F). The over-temperature shutdown and restart
are automatic.

2.7 GROUNDING

CAUTION

PROPER SITE GROUNDING AND LIGHTNING
PROTECTION ARE VERY IMPORTANT TO PRE­VENT PERMANENT DAMAGE TO THE REPEATER.

As in any fixed radio installation, measures
should be taken to reduce the possibility of lightning
damage to the Viking VX equipment. Proper ground­ing eliminates shock hazard, protects against electro­magnetic interference (EMI) and lightning.

Ground each piece of equipment separately. Do
not ground one piece of equipment by connecting it to
another grounded piece of equipment. A good DC
ground must be found or created at the site. Rooftop
site grounds can be researched through the building
management or architects. Tower site grounds must
be made with grounding rods. The many techniques
for providing adequate grounds for towers and poles
and for installi ng bui ldin g g round b us li nes a re be yond
the scope of this manual. Refer to National Electrical
Code article 250 "Grounding Techniques," article 800
"Communications Systems" and follow local codes.

The ground bus should be routed to the floor area
within 5 feet of the system with a runner of 6 AW G or
larger solid copper wire or 8 AWG stranded copper
wire.

same wire sizes as specified for coaxial cables for any
ground connections required by the secondary
protectors.

RF

An RF protector keeps any lightning strike to the
antenna feed line or tower from damaging the Repeat­ers. Instal l this protection in-line with the combiner
and antenna feed line.

RF protectors are selected by calculating the
maximum instantaneous voltage at the output of the
combiner. Do this by using the following equation.

V

= 1.414 (X) (√P(50))

P

where:

V

= Voltage at the output of the combiner.

P

P = repeater output in watts

X= for VSWR=

1.05 1.10 : 1

1.09 1.20 : 1

1.13 1.30 : 1

1.17 1.40 : 1

1.20 1.50 : 1

1.30 1.86 : 1

Example: Repeater power output of 60W with a
VSWR of 1.3 : 1 (for this VSWR, X = 1.13):

V

= 1.414 (1.13) (√60(50))

P

VP = 1.59782 (√60(50))
VP = 1.59782 (54.772256)
V

= 87.52V

P

Telephone Line

There are four types of pr ote ct ion suppressors for
telephone lines; Gas Tube, Silicon Avalanche Diode,
Metal Oxide Varistor and Hybrid.

The outer conductor of each transmission line at
the point where it enters the building should be
grounded using 6 AWG or larger solid copper wire or
8 AWG stranded wire.

Secondary protection (other than grounding) pro­vides the equipment protection against line transients
that result from lightning. There are two types of sec­ondary protection, RF and Telephone Line. Use the

August 2000
Part No. 001-2001-200

The hybrid protector is ideal for E.F. Johnson
equipment, and is strongly recommended. A hybrid
suppressor combines several forms of protection not
available in just one type of device. For example, a
high-speed diode r eacts fir st, cl amping a volta ge str ike
within 10 ns, a heavy duty heat coil reacts next to
reduce the remainder of the current surge, and a high­powered three-element gas tube fires, grounding Tip
and Ring.

2-4

2.7.1 PROTECTION GUIDELINES

Follow these guidelines for grounding and light­ning protection. Each Repeater instal l ati on si te is dif ­ferent; all of these may not apply.

1. Ensure that ground connections make good metal-

to-metal contact (grounding rod, grounding tray,
metal conduit) using #6 ga uge solid wi re or braid ed
wire straps.

2. With surge protectors, ensure that ground wires go

directly to ground, and not through other
equipment.

3. Run the ground wire for RF coax prote ctors directly

to ground.

4. With coax protectors, ensure maximum instanta-

neous voltage does not exceed the rated voltage.

INSTALLATION

5. Do not run ground wire s parallel t o any other wir ing

(e.g. a ground wire parallel to a telephone line),
except other ground wires.

6. Double check all equipment for good ground and

that all connections are clean and secure.

2.8 UNPACKING AND INSPECTION

E.F. Johnson ships the Repeater securely crated
for transportation. When the Repeater arrives, ensure
the crates remain upright, especially if storing the
crates tem porarily.

When unpacking the Repeater, check for any visi­ble damage or problems caused by shipping. If there
is obvious damage from shipping mishaps, file claims
with the carrier. If there appears to be any damage
caused before shipping , file a claim with E.F. Johnson.
Contact Customer Service for assistance (see Section

1.7).

If everything appears undamaged, remove the
Repeater equipment from the crate, using normal pre­cautions for unpacking.

TX COMBINER

DUPLEXER

RX MULTICOUPLER

POWER STRIP

Figure 2-4 RACK MOUNTED REPEATERS

2-5

Part No. 001-2001-200

August 2000

INSTALLATION

T/R ANTENNA

RECEIVER 1

RECEIVER 2

RECEIVER 3

RECEIVER 4

RECEIVER 5

RECEIVER

MULTICOUPLER

PREAMPLIFIER

Figure 2-5 5-CHANNEL COMBINING SYSTEM

NOTE: Do not discard the packing materials. If you
must return an item; use the same packing materials
and methods (including static protective bags for cir­cuit cards) to repack the equipment. You are responsi­ble for proper repacking. E.F. Johnson cannot be
responsible for damage to equipment caused by
negligence.

NOTE: Repeaters should not touch, leave a minimum
of one empty screw hole (appr oxi m at el y 1/2 ") bet w een
repeaters vertically especially for bottom ventilation
slots in high power repeaters.

TRANSMITTER 1

DUPLEXER

TRANSMITTER 2

BANDPASS

FILTER

TRANSMITTER

COMBINER

TRANSMITTER 3

TRANSMITTER 4

TRANSMITTER 5

sion) that connects to a HSDB that is also servicing
LTR 1010 repeaters, other VIKING VX repeaters that
use VIKING VNC cards, or an ID Validator must also
use the adapter module. The BNC Adapter Module is
installed on the back of the VIKING VX repeater cabi­net (see Figure 2-13).

Systems constructed onl y wit h LTR VIKING VX
repeaters that have Version 202 or later HSDB soft­ware and do not use VNC cards can be connected
directly to the HSDB from the RJ-11 jack on the back
of the repeater.

NOTE: Each repeater should be grounded separately
by connecting a ground bus from the g r o und lu g o n the
back side of the RF module to the ground bar on the
rack (see Figure 2-8).

2.9 REPEATER DATA BUS INSTALLATION

VIKING VX repeaters with Hig h Speed Dat a Bus
(HSDB) sof tware Version 201 or earlier (reference
U14 label) installed on the MPC board must use the
optional RJ-1 1 to BNC Adapter Module (see Table 1-1
and Figure 2-9) to connect the HSDB. Any VIKING
VX repeater (regardless of the HSDB software ver-

August 2000
Part No. 001-2001-200

2.9.1 MPC DA TA BUS SWITCH SETTINGS

Switch settings on the MPC for the two types of
installations require S2 and S3 sections to be switched
as indicated in Figures 2-10 through 2-13.

2.9.2 MPC DATA BUS JUMPER SETTINGS

Refer to Figure 2-6 for crystal selection and
HSDB Code selections jumper placement. The
jumper on J5, pins 2-3 select s 12 MHz crystal for LTR.
The jumper on J4, pi ns 3-4 conne cts EP ROM U14, pin
27 (A14) to +5V for LTR single-ended 5V data bus.

2-6