Timer = Menu Option; Mode 5: Keypad Off/Brightness Adjust - Meade LX200 Instruction Manual

FREQ RATE DESCRIPTION
60.1 Hz Q Sidereal rate;
Quartz setting
60.0 Hz Solar and
planetary rate
57.9 Hz Lunar rate
There are three menu file options in FREQ =. To see or set the
options, move the arrow to FREQ = and press ENTER. At
power up, the FREQ = default is the 60.1Hz Q setting. The
quartz rate is precisely fixed and cannot be altered. To choose
a different rate, press the ENTER key to see 60.1 M and then
again to see 60.1 M with the up and down arrow. These two
menu file options can adjust the tracking speeds. The
adjustment techniques are described below:
Display 34 shows the manual rate menu file option that can be
adjusted by pressing and holding the ENTER key to get the
double beep tone and the blinking cursor. Type in the new rate,
then when finished, press the ENTER key again.
FREQ = 60.1 M
Display 34
Display 35 shows the menu file option that allows you to step
the drive tracking frequency setting in tenths of a hertz, by
using the PREV and NEXT (up and down arrow) keys. This is
a convenient feature if you are trying to match the precise
speed of a planet, comet, or any other non-stellar object. To exit
this option, press the MODE key.
FREQ = 60.1M ¤
Display 35
5. Mode Five: KEYPAD OFF/BRIGHTNESS ADJUST
In order to see very faint objects, it will sometimes be
necessary to either dim or completely turn off the keypad red
LCD backlighting. To do so press the MODE button until the
display goes blank. This is the OFF option.
To set the keypad brightness, press the ENTER button and
adjust the brightness to your satisfaction with the PREV and
NEXT keys. To exit, press the MODE key.
This brightness setting also dims the power panel power LED
and Ammeter.
NOTE: The backlighting is done by edge lighting a plastic light
bar underneath the keypad. Four LEDs are used and do not
give a perfectly even backlighting of the keys as keys closer to
a LED will be a little brighter than those keys further away.
- 23 -
NOTES
Default rate at
power up. Gives
sidereal frequency
accuracy to ±.005%;
Best for astrophotos
Average rate for
tracking planets;
Actual rates vary due
to retrogrades,
oppositions, etc.
Best rate for
tracking the Moon