M Title Page VHF Vehicle Roof-Top Antennas HAD4021A HAD4022A Installation Manual Motorola Solutions, Inc. 1303 E. Algonquin Rd., Schaumburg, IL 60196-1078, U.S.A.
Foreword This manual applies to mobile radios, unless otherwise specified. It includes instructions for installing antennas in a vehicle roof-top configuration. Product Safety and RF Exposure Compliance Caution Before using this product, read the operating instructions for safe usage contained in the Product Safety and RF Exposure booklet enclosed with your radio. ATTENTION! This radio is restricted to occupational use only to satisfy FCC RF energy exposure requirements.
Introduction The vehicle roof-top antennas are each supplied with a coaxial lead-in cable and connector. In the completed installation, the cable is concealed between the headlining and the roof of the vehicle, with minimum disturbance to the headlining and the upholstery. Figure 1 shows the two roof-top antennas. HAD4021A Unity Gain Quarter-Wave 136 –174 MHz HAD4022A * 3 dB 5/8th Wave 132 – 174 MHz * Requires tuning in the field as per the tuning instructions. Figure 1.
2 Tuning Instructions for the HAD4022A Gain Antenna Tuning Instructions for the HAD4022A Gain Antenna The HAD4022A antenna must be trimmed in order to tune the antenna to cover the 132 – 174 MHz frequency range. Perform the following to trim the antenna: 1. Remove the rod from the base of the antenna by unscrewing the two setscrews. 2. Cut the bottom portion of the rod, located below the ferrule, as per “ Tuning Chart for HAD4022A” on page 12. 3.
Motorola Recommendations for Vehicle Roof-Top Antenna Locations 3 Table 1. Recommended Antenna Installation Locations (Continued) Vehicle Type Recommended Location Other vehicles Contact your Motorola Field Technical Representative. Do not install closer than the distances stated in the safety publication referenced in the section, “ Product Safety and RF Exposure Compliance” on page ii, for the relevant transmitter output power, from occupants or without proper antenna ground plane.
4 Required Tools and Materials Required Tools and Materials The following tools and materials are needed to properly install the motorcycle radio antennas: • 10-inch adjustable wrench, or 1-inch open-end wrench • 15/16-inch open-end wrench • Antenna hole-cutting tool, Motorola RPX-4378A • Center punch • Crimping tool 66-80388A26 • Hammer • Large hand drill • Pliers • Round file • Side cutters • Soldering station & solder Installation Procedure The installation procedure that follows is for a typical pass
Installation Procedure 5 5. For proper seating of the bushing assembly and locking nut, remove any burrs and/or foreign matter from above and below the (top) 3/4-inch mounting hole. This should be done for at least 1/8 inch out from the hole edge. For double-roof construction vehicles (without dome light), also be sure to clear the second (or bottom) 3/4-inch hole of any burrs. When installing the lead-in cable, the cable should not be shortened. Caution 6.
6 Installation Procedure 9. Refer to Figure 3. Insert the bushing assembly into the mounting hole as shown, tilted slightly. Be sure that all of the cable has been pulled through to the radio. The threaded portion of the bushing assembly will not fall through the mounting hole. Caution In double-roof vehicles, which have no dome light, DO NOT attempt to secure the base mount to both roof layers. Secure it to the top, outer roof layer only. MAEPF-27628-O Figure 3. Inserting the Bushing Assembly 10.
Installation Procedure 7 MAEPF-27630-O Figure 5. Pulling Upward on the Bushing Assembly Caution The locking nut must come into contact with the vehicle roof to ensure the proper antenna radiation pattern is created. This can only be accomplished when the rubber O-ring is fully compressed. 12. Using a 15/16-inch open-end wrench, tighten the locking nut until it bottoms firmly against the roof top.
8 Installation Procedure 13. Apply silicone grease to the weatherproof rubber seal (see Figure 2). 14. Slide the rubber seal down and around the locking nut so that it sits immediately on top of the roof. 15. Refer to Figure 8. Position the antenna over the locking nut, and secure the metal cap to the external threads of the locking nut. MAEPF-27626-O Figure 8. Attaching the Antenna 16. With the antenna rod in a perfectly vertical position, tighten the metal cap by hand as much as possible. 17.
Connector Fabrication (Mini-UHF) 9 Connector Fabrication (Mini-UHF) Refer to Figure 9. Use the Motorola crimping tool (part number 66-80388A26) in the following procedure. FIVE CRIMP AREAS A B .256 .319 C D E .051 .068 .213 Figure 9.
10 Connector Fabrication (Mini-UHF) Figure 10 illustrates the order in which the mini-UHF connector items must be assembled on the antenna cable. Center Wires Connector Body Gold-Plated Center Pin Shell Crimp Braided Shielding Dielectric Figure 10. Mini-UHF Connector Components To assemble the mini-UHF cable connector, do the following: 1. Trim the jacket, the braided shielding, and the dielectric of the cable to 6 mm (0.24 in.) from the end of the cable in order to expose the center wires. 2.
Connector Fabrication (Mini-UHF) 6. Push the shell forward until it rests on the connector body, and then push the crimp forward allowing the braided shielding to be compressed between the crimp and the body of the connector. 7. Use crimp area E of the crimping tool shown in Figure 9 on page 9 to form the crimp into place.
12 Tuning Chart for HAD4022A Tuning Chart for HAD4022A HAD4022A 50 49 48 47 46 45 44 Rod Length (inches) 43 42 41 40 39 38 37 36 35 34 33 32 31 30 132 134 136 138 140 142 144 146 148 150 152 154 156 158 160 162 164 166 168 170 172 174 Frequency (MHz) Figure 11.
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