Meade LX850 User Manual - Page 34
Lx850 Telescope To Look At - manual
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AutoASuttaorSt#a4r9I7I HOApeNrDatBiOonX • Tracking Rate: Changes the speed at which the telescope tracks targets in the sky. a. Sidereal: The default setting for Autostar II; sidereal rate is the standard rate at which stars move from East to West across the sky due to the rotation of the Earth. b. Lunar: Choose this option to properly track the Moon over long observing sessions. c. Solar: Choose this option when observing the Sun. (WARNING: NEVER US A MEADE LX850 TELESCOPE TO LOOK AT THE SUN! Looking at or near the sun will cause instant and irreversible eye damage.) d. Custom: Allows entry of user-defined tracking rates. Note: Custom Tracking Rate allows you to enter values from -999.999 to 999.999. The lower the number, the slower the rate; the higher the number the faster the rate. If you enter -999, the telescope will move so slow as to appear to be stopped. If you enter 999, the telescope will be moving at approximately twice the tracking rate. • Guiding Rate: Allows you to change the base slew speed, 1x. Enter a percentage of the speed (less than 100%) and press ENTER. This function may be useful in guiding the telescope during CCD and long-exposure photography. See SLEW SPEEDS, page 22, for more information. • DEC Guiding: Allows a user using an autoguider to disengage autoguider inputs. Allows you to select N & S, North only, South only, and off. • Reverse L/R: Reverses the functions of the Left and Right Arrow keys for controlling the telescope's motion (i.e., the Right key moves the telescope to the left). • Reverse U/D: Reverses the functions of the Up and Down Arrow keys for controlling the telescope's motion (i.e., the Up key moves the telescope down). • Home Sensor: Turns off or on the True North sensor, if preferred, for Easy, One-Star, and TwoStar alignment. The default setting for this menu is "On." • GPS Alignment: Allows three options. Select "Off" if you wish to align the telescope manually (turns off GPS). Select "On" (default setting) if you wish to automatically align your telescope and want the telescope to get the GPS fix when it is needed during alignment. Select "At Start Up" if you want the telescope to get a GPS fix when the telescope is powered up. • HPP Dome Delay: Allows time for the dome of an observatory-mounted telescope to catch up with the telescope before StarLock takes a highprecision star sighting. By default, this value is "0." The value should be set based on the worst-case rotation time of your dome. The time is entered in seconds of delay. Advanced software programs can release this hold early if the dome system is configured to notify the telescope when it is ready. See the Meade Telescope Protocol Specifications for details. • RA PEC: Allows you to perform periodic error correction on the RA drive. • High Precision: If High Precision is turned on, when looking for a faint celestial object (e.g., a nebula or galaxy), Autostar II first slews to a nearby bright star and displays "ENTER to Sync." Center the star in the eyepiece, then press ENTER. At that point the telescope has a high precision alignment to that part of the sky and it then slews to the object that was originally requested. Targets: Switches between astronomical targets and Terrestrial targets. If "Astronomical" is selected, the telescope tracking motor is activated and any object you observe in the sky will remain centered in the eyepiece. If "Terrestrial" is selected, the tracking motor is turned off. Date: Changes the date used by Autostar II. This function is useful to check events in the past or future. For example: Set the Date menu for a day three months in the future. Then check the "Select Item: Event" menu for the Sunset time on that date. See EVENT MENU, page 35. Time: Changes the time entered into Autostar II. Setting the correct time is critical for Autostar II to properly calculate locations and events. Time may be set to "AM," "PM," or 24-hour mode (military time). To select the 24-hour mode, press ENTER when the "blank" option displays (i.e., neither "AM" nor "PM" 34