Nexstar SynScan - Manual (Page 12)

PEC Training
1. Perform the accurate method (see the manual).
2. Slew or manually point the telescope to a star with smaller DEC coordinate. This object will be
used as the guide star.
Activate Sidereal Tracking from the Setup Menu (see Setup Functions). Once the tracking has
started, press ESC to go back to the Setup Menu.
4. Rotate the reticle eyepiece until one set of the lines becomes parallel to (or matches) the R.A.
movement of the telescope (see step 2 to 4 of the Cone Error Calibration for more information on
how this is done.)
5. Move the guide star back at the center of the eyepiece view using the direction keys.
6. On the hand control, select PEC Training in the Utility Functions and press ENTER.
Utility Functions can be easily accessed by pressing the UTILITY quick reference on
the keypad.
7. Select the R.A. guide speed for the PEC training.
8. The
hand control will display the current time once the guide speed is selected,
indicating that the recording has begun.
9. Using the LEFT or RIGHT direction key only, move the telescope so the guide star remains at
the center of the eyepiece view s). Repeat whenever necessary.
The Guide star drifts
away from the center
Adjust the telescope to move the
guide star back to the center
For 8 minutes (10 minutes and 30 seconds for the EQ6 hand control
records the manual guiding actions in order to characterize the periodic errors. Pressing ESC
will stop the recording immediately and exit from the PEC training function.
Guiding actions are recorded the PEC training is stopped midway. this case, the
tracking will not be accurate until a full cycle of the PEC training is performed.
11. The will beep and display "Record completed" when the training time is up. Press
any key to exit from the PEC training.
Play back the PEC record
PEC tracking can be activated under the Setup Menu or pressing the SETUP quick reference on the
keypad when needed. In the Setup Menu, choose Set Tracking, then SynScan'" will play back
the corrections you made during the PEC training cycle and start tracking with periodic error compensated.
The will continue to track in the mode another tracking
mode is selected. If the power is turned off while the is under the
mode, the hand control loses synchronization with the R.A. worm gear and the PEC
Training will have to be performed again when the power is turned back on. To avoid this,
be sure to return the telescope to its home position by selecting PARK under the
before turning off the power.