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3. Attach the horizontal motor assembly (V-4) to the telescope by following the same proce-
dure outlined in step 2, above.
Note: With both the vertical and horizontal motor assemblies attached, the telescope now
appears as in Fig. Y. (Note that cords have been omitted from Fig. Y for clarity.)
4.
Plug in the following cords to the control panel (V-5 and Fig. W):
a. Cord from the vertical motor assembly (V-1) plugs into the ALT (altitude, or vertical) jack
(Fig. W).
b. Cord from the horizontal motor assembly (V-4) plugs into the AZ (azimuth, or horizon-
tal) jack (Fig. W).
c. Cord from the Electronic Controller (Y-2) plugs into the HBX (handbox) jack (Fig. W).
5. Finally, plug the cord from the battery pack (Y-1) into the “12v” jack (Fig. W).
6. As soon as the battery pack is connected to the “12v” jack on the control panel, all four indi-
cator lights on the Electronic Controller (Fig. X) start blinking rapidly. Press the SPEED key
on the Electronic Controller and the telescope slews (moves) momentarily in the vertical and
horizontal directions to test the motors. When the test is complete, Light 1 (see Fig. X) comes
on steady; Lights 2, 3, and 4 turn off.
7. The #492 Dual-Axis Electronic Control System is now operational. Use the four arrow keys
(X-5) to slew the telescope to the desired object. To change speeds, press the SPEED key (X-
6) on the Electronic Controller. Depressing this key consecutively causes telescope speed to
cycle through all of the four available speeds, from fast to very slow.
The speed in operation is indicated by the four indicator lights (1, 2, 3, and 4, Fig. X) on the
Electronic Controller, as follows:
Light 1: 5°/second (fast). Use this speed to move the telescope across the sky rapidly
from one object to another.
Light 2: 0.75°/second (moderate). Use to center objects in the field of the viewfinder.
Light 3: 8 arc-minutes/per second (slow). Use to center objects in the field of view or to
track objects at lower powers.
Light 4: 2 arc-minutes/sec. (very slow). Use to center objects in the field of view or to
track objects at higher powers (e.g., above magnifications of about 80X).
Operating Notes on the #492 Dual-Motor Electronic Control System:
1. For the motors of the #492 System to be operational, the vertical and horizontal lock-knobs
(V-6) and (V-7) must be in their locked positions. Firm-feel tightening of these locks is suffi-
cient. Do not overtighten.
2. When setting up the telescope, always plug in the battery pack to the control panel last,
after plugging in the two motors and the Electronic Controller. Connecting the battery pack to
the control panel before the motors and Electronic Controller are connected may result in false
electrical signals being sent to the motors, causing them to malfunction. In this case unplug
the battery pack from the control panel, wait a few seconds, and plug the battery pack back
into the control panel. This operation clears the motors of any false signals.
3. When using the arrow keys (X-5) to reverse the direction of motion of the telescope (e.g.,
when changing the telescope's direction of motion from horizontal-right to horizontal-left),
there may be a brief pause before the telescope begins moving. This pause is caused by the
internal gears of the motor assemblies.
4. The MODE key of the Electronic Controller (Fig. X) is inoperative on the #492 System;
pressing this key has no effect. (The MODE key is used in certain specialized operations on
other Meade telescope models where equatorial (polar) alignment of the telescope is desired.)