- 7 -
2.Press the MODE key twice. The display will look like Display 8, but with random LOCAL and SIDE times.
→LOCAL = 11:24:30 SIDE = 21:38:02
Display 8
3.Press and hold the ENTER key until the Keypad Hand Controller beeps (display like Display 9).
DATE = 11/28/97
Display 12
9.Press and hold the ENTER key until the Keypad Hand Controller beeps. The display will look like Display 13, with the blinking cursor over the first number.
→LOCAL = 11:24:30 SIDE = 21:38:02
Display 9
4.Using the number keys, enter the current local time to within 5 seconds. (Remember, 4:25:00 P.M. is 16:25:00 in the 24 hour format.) Corrections can be made by moving the flashing cursor using the "W" and "E" keys. The display should look like Display 10.
→LOCAL = 16:25:00 SIDE = 21:38:02
Display 10
5.Press the ENTER key when the time is correct. The display will change to Display 11.
Hours from GMT: + 0 8
Display 11
6.Enter the Greenwich Mean Time (GMT) time zone shift. (This procedure is a lot easier than it sounds.) For users in the United States, look up your time zone in the table below to find the GMT time zone shift.
TIME ZONE | Standard Time | Daylight Savings Time |
Eastern | + 5 Hours | + 4 Hours |
Central | + 6 Hours | + 5 Hours |
Mountain | + 7 Hours | + 6 Hours |
Pacific | + 8 Hours | + 7 Hours |
Hawaii | + 10 Hours | + 9 Hours |
For example: For the Pacific Time Zone on Daylight Savings Time, the GMT time zone shift is +7 hours.
7.Use the number keys to enter the GMT time zone shift determined from the table above. Press ENTER when done; the display will go back to Display 8. If you are using the CDS East of Greenwich U.K., then you must enter a - (minus) GMT time zone shift by moving the blinking cursor backwards in the display with the "W" key and then pressing the NEXT key. The + (plus) sign will change to - (minus).
NOTE: The time keeping mechanism in the CDS is a standard clock chip. It may be necessary to confirm the time when first starting an observing run. However, once the system is aligned and the telescope knows its exact location in the sky, this information is used to calculate a very accurate sidereal time.
8.Press the ENTER key. This will select the DATE display (Display 12), with a random date showing.
DATE = 11/28/97
Display 13
10.Use the number keys to enter the current date. The display should look like Display 14. Use the "W" and "E" keys to move the blinking cursor left and right to correct any mistakes.
DATE = 01/15/9 8
Display 14
11. Press the ENTER key when the date is correct.
After you press the ENTER key, the Keypad Hand Controller will display “Updating planetary data”. The position of the planets depends on the date, so anytime the date is changed, the planet positions are recalculated.
This is all the information the CDS needs to make use of all its features. The next steps actually align the telescope with the night sky.
3) Telescope and CDS Alignment.
After the basic information has been entered into the system, the CDS is ready for use. With a telescope that has been properly assembled and balanced (as per the telescope's instruction manual), you are ready to begin. Following these steps:
1.Face the field tripod leg (1), Fig. 7, that is centered under the Power Panel, so that the LXD mount points to the approximate North or South Pole star position in the sky (using a simple hand held compass may help). Then, use the Bubble Level located on the base of the LXD mount to level the telescope.
2.Turn "On" the CDS electronics. After a few seconds (when the
→TELESCOPE OBJECT LIBRARY
Display 15
3.Press the ENTER key to select the TELESCOPE functions. The display should look like Display 16.
→1) SITE 2) ALIGN
Display 16
4.Press the NEXT key to move the arrow to the lower line (see Display 17).
