Meade Instruments ETX 90EC - Manual (Page 8)

Electronic Controller Functions
Fig. 3: Electronic Controller. (1) Arrow Keys; (2) Indicator
Lights; (3)
SPEED Key; (4) Coil Cord; (5) MODE Key; (6) OUT
Key; (7) IN Key.
Fast
Medium
Moderate
Slow
ᕡ
ᕢ
ᕦ
ᕥ
ᕤ
ᕧ
Indicator Light Key
The procedures in this manual
identify the status of the four
indicator lights as depicted
above: on, blinking, or off.
Light 1
Light 2
Light 3
Light 4
On
Blinking
Off
Light No. Light Status
- 8 -
The Electronic Controller provides you with the means to control the telescope motors from a compact
handbox. The Electronic Controller (Fig. 3) has soft-touch keys designed to have a positive feel, even
through gloves.
The primary functions of the Electronic Controller are to move (slew) the telescope to an object, indicate the
slew speed, and to operate the optional #1244 (ETX-90EC or ETX-105EC) or #1247 (ETX-125EC) Electric
Focuser (see
OPTIONAL ACCESSORIES , page 20). Other functions are also possible when using the MODE
key. A detailed description of the functions and operation of the Electronic Controller is found in ADVANCED
ELECTRONIC CONTROLLER FUNCTIONS , page 26.
ᕡ Arrow Keys (1, Fig. 3): Press one of the four Arrow keys to slew the telescope (i.e., up, down, left,
and right) at any one of four slew speeds (see
SPEED KEY below).
Important Note: If you reverse directions while using the Arrow keys to slew to objects, there
may be a slight pause as the telescope motors compensate for the reversal of the internal
gears.
ᕢ Indicator Lights (2, Fig. 3): The four red LED (Light Emitting Diode) lights indicate the current slew
speed of the telescope.
Note: For purposes of this manual, the lights are identified as 1 through 4, with 1 being the top light
and 4 being the bottom light.
ᕣ
SPEED Key (3, Fig. 3): Press the SPEED key to change the speed at which the telescope slews to an
object. Each press of the SPEED key changes the slew speed to the next slower setting. If the controller
is already on the slowest slew speed (light 4), pressing the SPEED key cycles back to the highest speed
(light 1). Slew speeds are signified by the indicator lights (2, Fig. 3).
ᕤ Coil Cord: Plug into the HBX connector of the Computer Control Panel.
ᕥ
MODE Key (5, Fig. 3): Press and hold the MODE key to place the Electronic Controller into the Mode
function (see APPENDIX A , page 26).
ᕦ
OUT Key (6, Fig. 3): When using the optional #1244 (ETX-90EC or ETX-105EC) or #1247 (ETX-
125EC) Electric Focuser (see OPTIONAL ACCESSORIES , page 20), press the OUT key to move the
focus point outward.
ᕧ
IN Key (7, Fig. 3): When using the optional #1244 (ETX-90EC or ETX-105EC) or #1247 (ETX-125EC)
Electric Focuser (see OPTIONAL ACCESSORIES , page 20), press the IN key to move the focus point
inward.
ᕣ