Assessments - 2, GPA: 3
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Note: If the cable jacket’s outer diameter is less than 7/32" (0.21", 5.3 mm), wrap the jacket with electrical tape to build up its diameter before folding back the braid over the jacket (C2). Trim the shield wires to 9/16" (15 mm). RG8:When using RG8-type cable, more jacket material needs to be removed and partially replaced with shrink tubing. When installing the tubing, heat the tubing and cable only enough to shrink the tubing. Allow the cable to cool fully before manipulating it further. The drawings in Figures D and E are actual- size; the shrink-tubing indications show the actual length of pieces to be cut, and their correct placement on the cable. Cut the required pieces from the included shrink tubing. RG8 / Rear exit:When connecting antennas from the rear, follow the cable-stripping dimensions in Figure D. Then install a 1"long (25 mm) piece of shrink tubing as indicated. Remove the cable clamp and carefully insert the cable end into position through the rear plate. RG8 / Bottom exit:When connecting antennas through the opening in the antenna housing, follow the cable-stripping dimensions in Figure E. Then install a 2.5"-long (63 mm) piece of shrink tubing as indicated. Remove the cable clamp and carefully position the cable to exit at the bottom edge of the rear plate. The end of the cable’s jacket must be located about 1/4" (6 mm) beyond the end of the rear plate to clear the bottom of the housing. Then secure the clamp and center conductor. Fig. C RG58, 3D, 5D Cables (C1) 0.79" (20 mm) (C2) 0.59" 0.59" (15 mm) (15 mm) 0.2" (5 mm) Fig. D RG8 Cable - Rear Exit Shrink Tubing 1" (25 mm) 1.22" (31 mm) 0.2" 0.59" (5 mm) (15 mm) 2.00" (51 mm) Fig. E RG8 Cable - Bottom Exit Shrink Tubing 2.5" (63 mm) 2.68" (68 mm) 0.2" 0.59" (5 mm) (15 mm) 3.46" (88 mm) Cable Connections Refer to Figure F (cable rear exit) or Figure G (bottom exit) for connecting positions. When using a screwdriver on the antenna terminals, always support the PC board. Center Conductor: Wrap the center conductor(s) clockwise around its screw and tighten snugly. (If using RG8, it is good practice to bend its center conductors using pliers, not force them around the screw terminal.) Shield: It’s most effective to remove the cable clamp entirely, properly position the shield portion of the cable, and then carefully reinstall the cable clamp over the shield. Make certain that the shield (and cable) are firmly clamped, and that no shield wires are loose or touching the center conductor. Especially when using RG8 or other large, stiff cable, it’s a good idea to provide some form of clamping of the cable near the antenna’s cable entrance for strain relief. Fig. F Rear Cable Exit Antenna Housing PC Board Rear Plate Housing Mounting Fig. G Bottom Cable Exit Antenna PC Board Housing Cable Exit Rear Plate Housing Mounting Setting Gain The gain switch on the PC board is intended only to compensate for signal lost in the antenna cable. Using "extra" gain is not necessarily better! Observe the following chart for proper gain switch setting: Gain Setting RG58-T ype Cable RG8-T ype Cable Hi (+10 dB) 20-50' (6-15 m) 50-150' (15-50 m) Mid (+4 dB) Up to 20' (6 m) Up to 50' (15 m) Lo (–2 dB) This setting may work best when many channels are in use in the room, or when external RF noise is a problem. Both antennas in a diversity system should be set to the same gain position. Other than setting the gain switches, do not make any adjustments to the circuitry. After stripping the cables, making cable connections and setting gain, replace the antenna housings. When re-installing the housing, be careful to avoid hitting the clear plastic "light pipe" for the LED power indicator. Once the housings are secured with the silver screws, connect the antenna cables to the diversity receiver or antenna distribution system and turn on the system. Then check for power indications at the antennas and proper operation of the overall wireless system. Specifications Antenna Type Half-wavelength dipole with RF amplifier Operating Frequencies ATW-A62P 656-668 MHz ATW-A72P 728-740 MHz Output Impedance 50 ohms Nominal Amplifier Gain +10 dB (Hi), +4 dB (Mid), –2 dB (Lo), switch selected Power Required +12V DC on RF cable center conductor, 14 mA per antenna Dimensions 2.44" (62 mm) W x 5.51" (140 mm) H x 5.91" (150 mm) D Weight 9.7 oz (275 g) each Accessories Furnished 2 AT8667 mounting brackets; shrink tubing (for use with RG8-type cable); 4 each of wood screws, 3.0 mm and 3.5 mm machine screws One-Year Limited Warranty Audio-Technica professional wireless systems purchased in the U.S.A. are warranted for one year from date of purchase by Audio-Technica U.S., Inc. (A.T.U.S.) to be free of defects in materials and workmanship. In event of such defect, product will be repaired promptly without charge or, at our option, replaced with a new product of equal or superior value if delivered to A.T.U.S. or an Authorized Service Center, prepaid, together with the sales slip or other proo...
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