Leisure Time LX20 - Manual (Page 23)

FREQ RATE DESCRIPTION NOTES
60.1 Hz Q Sidereal rate;
Quartz setting Default rate at power up.
Gives sidereal frequency
accuracy to ±.005%; Best
for astrophotos
60.0 Hz Solar and
planetary rate Average rate for tracking
planets; Actual rates vary
due to retrogrades,
oppositions, etc.
57.9 Hz Lunar rate Best rate for tracking the
Moon
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 60.1 Hz 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.
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.
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.
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