Motorola 99FT3081 Users Manual

Mobile 1/4-Wave Antennas

Roof Mount

Product Safety and RF Exposure Compliance

CAUTION!

Before using this product, read the operating instructions for safe usage contained in the Product Safety and

C a u t i o n

RF Exposure booklet enclosed with your radio.

ATTENTION!

This radio is restricted to occupational use only to satisfy FCC RF energy exposure requirements. Before

using this product, read the RF energy awareness information and operating instructions in the Product Safety and RF Exposure booklet enclosed with your radio (Motorola Publication part number 68P81095C99) to ensure compliance with RF energy exposure limits.

Introduction

Installation

Mounting Hardware Installation – Roof Mount

General

The installation procedure which follows is for a typical passenger car. The procedure may vary slightly with the type of vehicle on which the antenna is to be installed. Generally speaking, however, the procedures outlined are of a universal nature.

ROD WITH

CHROME NUT

(ROD)

01-80352A07 01-80352A08 01-80305K05 01-80352A11 01-80352A90

MOTOROLA

PART NO.

01-83938B03 01-83938B04 01-83938B12 01-83938B06 01-83938B11

ANTENNA ONLY

ANTENNA

MODEL NO.

RAD4012ARB RAD4020ARB HKAD4001A RAE4034ARB RAF4021ARB

FREQ. RANGE

(MHz)

150.8-162 162-174 216-225 450-470 806-870

The antennas described in this section are supplied with an appropriate antenna whip, coaxial cable and connector, and mounting hardware. Mounting hardware and installation is described for permanent vehicle type mounting.

Table 1. Model Complement

Antenna Model Frequency Range (MHz)

Roof Mount Models

RAD4012ARB RAD4020ARB

HKAD4001A RAE4022ARB RAE4034ARB RAF4021ARB

150.8-162 162-174 216-225 403-430 450-470 806-870

Refer to Table 1 for model identification. Figures 1 through 3 identify the component parts of the antenna. Refer to the recommendations for antenna location paragraph at the end of this instruction section for safety information.

Figure 1. Whip Parts Identification

NOTE

The antenna should be mounted on a flat metal roof of .020 to .040 inch thickness.

1. First, select a location for the antenna as near the center of the roof as possible.

2. The headlining may be probed with the fingers to make sure that all points of obstruction are avoided

Installation Procedure Single Wall Construction

1. Locate the center of the roof by careful measurement, remove the headlining as necessary,

*6880360B49*

6880360B49-A

Mobile 1/4-Wave Antennas Installation

01-80300B02

CABLE ASSEMBLY & INSTALLATION KIT

(150.8-174 MHz, 216-225 MHz, 403-470 MHz

AND 806-870 MHz RANGE)

MOTOROLA

PART NO. DESCRIPTION

01-84988K01 BUSHING ASSEMBLY 11-80369B40 SILICONE GREASE 14-83798C01 CAP, INSULATOR 28-84606M01 MINI UHF CONNECTOR 30-80336A10 14 FEET RG58A/U COAX 42-83940B01 “O” RING 43-83881B01 LOCKING NUT

Figure 2. Roof Mount Parts Identification

Figure 3. Cross-Section of Assembled Antenna

2 6880360B49-A July, 2002

Installation Mobile 1/4-Wave Antennas

and drill a pilot hole down through the roof. If the interior light of the car is centered in the roof, remove this light and fixture and drill the pilot hole up through the roof at about the center of the interior light mountings. This centers the antenna mount on the roof and allows for easy access.

2. Drill a 3/4-inch hole from the top of the roof until the saw bottoms. Use a Motorola hole cutting saw (01-80382A25) or equivalent. When the saw bottoms on the roof, it cleans off the paint in a neat circle and assures good contact with the locking nut.

IMPORTANT

For proper seating of brushing assembly, remove burrs and scrape any foreign matter from underside of hole out to at least 1/8-inch from edge.

3. Determine the routing of the cable from the antenna mounting base to the radio set; then remove the molding and trim necessary to facilitate pulling the cable through.

NOTE

To ensure ease of assembly, thread the locking nut on and then off the bushing assembly before installation. This removes any burrs which may be present.

7. Pull up on the bushing assembly as illustrated in Figure 8, and make sure it is centered and seated (both shoulders inside the drilled hole), and that the "O" ring is in the groove in the locking nut. (As furnished, the "O" ring has been placed in the locking nut groove and imbedded in silicone grease.) Use a 15/ 16-inch open-end wrench to tighten the locking nut until it bottoms firmly against the roof top.

IMPORTANT

Refer to Figure 2. If the bushing assembly should slip or rotate for any reason during the tightening procedure, insert the tips of a long nose plier or spanner wrench into the two holes in the bushing assembly and apply force to prevent rotation until the locking nut is tight.

The locking nut must come into contact with the car roof to insure the proper antenna radiation pattern. This can only happen when the rubber "O" ring is fully compressed.

8. Take up the slack in the cable and replace the headlining retainer molding.

9. Replace headlining and dome light if removed.

Installation Procedure - Double Wall Construction

4. Refer to Figure 4. From the top, feed the RG-58A/U lead-in cable between the headlining and the metal roof. Then route the cable between the roof and the radio set.

5. Refer to Figure 5. The bushing assembly is now in a position to drop into the hole in the roof. It should be tilted at a slight angle and fed into the 3/4-inch hold. The threaded top will not fall through the hole.

6. Refer to Figure 7. Hold the antenna bushing assembly in place with the index finger and thread the locking nut onto it as shown.

Figure 4. Coaxial Cable Insertion Figure 5. Bushing Assembly Insertion

Vehicles With Dome Lights or Removable Headlining

1. Remove the dome light from its mount or remove the headlining from the installation area.

2. Drill a small pilot hole centered in the roof of the vehicle. The center of the cavity where the dome light was removed is sufficiently close.

3. Using a 1-1/4-inch diameter hole saw cut a hole in the inside layer of the metal.

4. Remove the metal and filler from this 1-1/ 4-inch diameter hole.

July, 2002 6880360B49-A 3

+ 5 hidden pages