User manual THINKTEK TWEETY SYLVESTER ANIMATED TALKING CLOCK

[. . . ] It will tune dipoles, verticals, Yagis or virtually any coax-fed antenna. It will match an amazing range of antennas and impedances, far greater than some other tuners you may have considered. Also, it consumes very little power making it suitable for battery-powered operations. While resembling earlier LDG tuners in overall layout and function, the AT-200Pro represents a quantum leap in features and performance. [. . . ] The new tuning parameters are stored for the present operating frequency, replacing any parameters that were previously stored for that frequency. Memory Tuning Cycle (Medium press) If you are tuning near a frequency at which you have already completed a tuning cycle, you can reset the tuner very quickly by using a Memory Tuning Cycle. Key your transmitter as described above, and press and hold the Tune button for . 5 to 2. 5 seconds, then release. The tuner will automatically check for a saved tuning setting, and if present will restore that setting in a small fraction of a second. If no tuned setting is saved near the present frequency, the tuner will begin a full tuning cycle, saving the result when finished for future operation on that frequency. In this way, your AT-200Pro "learns"; the longer you use it, the more closely it adapts itself to the bands and frequencies you use. You will probably use Memory Tuning most of the time; it takes advantage of any stored tuning settings, but automatically defaults to a Full Tuning cycle if no stored data is available. Steps are very small on the 75 meter band to accommodate the expected higher Q of most antennas, whereas the step size is somewhat larger on 10 meters where antenna Q is usually lower. Medium Press > . 5 Sec for Auto Tune Bypass mode (Short press) To place your AT-200Pro in bypass mode, press the Tune button less than a half-second. In bypass mode RF from your transmitter goes directly to the antenna with no matching. A second short press toggles the tuner back to its last tuned setting; the LEDs show which C and L relays are energized. You can if you wish press Func-Tune to save the bypass setting, erasing the memory for that frequency. 13 Power and SWR Indication During a tuning cycle the Power and SWR LED meter indicate forward power and the present SWR, respectively. NA Tune Ant C Dn L Dn Func + Key Func Hold + Key Hold on Power Up Hold on power-up for All Reset AT-200Pro Key Reference 16 Application Notes Mobile operation The AT-200Pro is perfectly suited to mobile operation. You can install it under the dash along with your transceiver, or remotely in the trunk. The only requirements are that the tuner remain dry, and that you provide a fused source of DC power in accordance with the specifications. The AT-200Pro does not include an internal fuse; you must provide one in the DC line. To install the unit under the dash, you can "homebrew" a bracket. You can also use Velcro tape, although the adhesive tends to soften in hot weather. In the trunk, Velcro works well to secure the unit to the trunk floor. Simply run coax from your transceiver to the tuner, run a fused DC line to the tuner and connect your mobile antenna. Simply set the tuner to Automatic mode, and you're ready to go; the tuner will adjust the match as needed whenever you transmit on a new band or frequency. You can observe the progress of the match on your rig's SWR meter, or on the power output meter (not while driving; keep your eyes on the road!). Most of the time this will happen very quickly, as the AT-200Pro tunes from memory in less than a second. Xcvr Tuner 2A DC When to use Auto mode Auto mode is most useful when you are often changing frequencies and bands (a contest, for instance). [. . . ] The program checks LC combination to see if a 1. 5 or lower SWR can be obtained, and stops when it finds a good match. The microprocessor runs a fine tune routine just after the tuner finds a match at an SWR of 1. 5 or less. This routine tries to get the SWR as low as possible (not just 1. 5); it takes about a half 21 second to run. If the swr is below 2. 0 when you press the tune button to start a tuning cycle, the tuner will first try a memory tune routine to see if it can achieve a low swr without a complete re-tune. [. . . ]