User manual YAESU G-450A APRS MANUAL

[. . . ] If it is necessary to use a mast of diameter less than 48 ~ 50 mm, nearly centered rotation can be achieved using the optional "GL-33" mast adjustment plate, per the illustrations below. Mast Diameter f32 to f38: Mast Diameter f39 to f47: Mast Diameter f48 to f50: Use two plates. Do not use a plate. · The use of a mast of outside diameter greater than 51 mm (2. 01") will result in off-center rotation. A mast of 60 mm outside diameter will result in rotation offset from the center by approximately 8 mm. [. . . ] Temporarily connect the round plug to the rotator, and the rectangular plug to the controller. Make sure that the POWER switch is set to the Off position, then connect the AC plug to your station's AC power outlet. The pilot lamps on the controller should become illuminated, and the meter needle on the controller may rotate so as to align itself with the current position of the rotator (remember, the two units have not been aligned with each other). Press the LEFT (left rotation) switch, and confirm that the rotator (when viewed from the top) and the controller's needle turn counter-clockwise together. Stop rotation, then press the RIGHT (right rotation) switch, and confirm that the rotator and indicator needle turn clockwise. If rotation does not occur as indicated, turn the POWER switch off, and re-check your cable connections. If the rotator and controller are working as described, replace the plug shells, setscrew, and rubber boot (removed in step 1). 6 Assembly of 6-pin Plastic Connector Assembly of 7-pin Metal Connector Wiring for the control cable (identical numbers to be inte Pin No. 7 for the metal connector is not used. 7 Mounting the Rotator and Antenna l Indoor Performance Check and Alignment 1. Now use a small screwdriver to adjust the Indicator Needle Adjustment Potentiometer (Fig. After aligning the needle to 0º, set the Adjustment Potentiometer Selection Switch back to the left position. You should observe the "OVERLAP" LED becoming illuminated as rotation passes the 360º point. If the OVERLAP LED does not light up at the 360º position, the Overlap LED Adjustment Potentiometer may be used to align the illumination threshold to the 360º point. Check to verify that rotation automatically stops at approximately 90º (East; representing a total rotation range of 450º from the original starting point). Press the LEFT and RIGHT rotation switches a few more times, verifying that rotation appears to be normal. If so, press the LEFT switch to return the rotator to the fully counter-clockwise (0º) position. At this time, you must determine whether you wish to leave the "Left Stop" position at North, or whether you wish to set it to South (to allow uninterrupted rotation from southeast to northeast to northwest to southwest, for example). If you wish to leave the "Stop" at North, the checkout process is complete. If you wish to set the "Stop" to South, again loosen the needle adjustment screw on the face of the controller, and rotate the needle to the "South" position. Be certain that the rotator is fully rotated to the "LEFT" position in either case. ADVICE The position of the "Left Stop" can be set to whatever position you like (North, South, East, or West). Just remember where you have set it, because the antenna must initially be aimed in the same direction when it is installed on the mast (see next section). 13. This completes the ground-based testing of the rotator and controller. 8 l Installation of Rotator and Antenna on Tower The procedure for installing the rotator depends on the type of tower used. The following instructions are generally applicable to most guyed, crank-up, or roof towers. [. . . ] The control cable attached to this rotator could, in the event of a nearby or direct lightning strike, carry lethal voltages down the cable and into your home. Yaesu strongly recommends the installation of suitable lightning arrestors on all control cables and coaxial lead-in cables from your antenna installation. See your dealer for details of available lightning-protection devices. If an electrical storm should be reported in your area, quickly unplug the control cable from the rear of the rotator's controller box, and disconnect the AC cable from the wall outlet. [. . . ]