INSTRUCTION MANUAL NexStar 80GTL - Celestron

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Appendix C - RS-232 Connection You can control your NexStar telescope with a computer via the PC port on the hand control and using an optional RS- 232 cable (see Optional Accessories section of manual). Once connected, the NexStar can be controlled using popular astronomy software programs. Communication Protocol: The NexStar telescopes communicate at 9600 bits/sec, No parity and a stop bit. All angles are communicated with 16 bit angle and communicated using ASCII hexadecimal. Description PC Command ASCII Hand Control Response 34 Notes Echo Kx X# Useful to check communication Goto Azm/Alt B12AB, 4000 # 10 characters sent. B=Command, 12AB=Azm, comma, 4000=Alt. If command conflicts with slew Goto Ra/Dec R34AB, 12CE Get Azm/Alt Z 12AB, limits, there will be no action. # Scope must be aligned. If command conflicts with slew limits, there will be no action. 10 characters returned, 4000# 12AB=Azm, comma, 4000=Alt, # Scope must be aligned Get RA/Dec E 34AB, 12CE# Set Azm-Alt S12AB, 4000 # 10 characters sent. S=Command, 12AB=Azm, comma, 4000=Alt Cancel Goto M # Is Goto in Progress L 0# or 1# 0=No, 1=Yes; "0" is ASCII character zero Is Alignment Complete J 0# or 1# 0=No, 1=Yes The cable required to interface to the telescope has an RS-232 male plug at one end and a 4-4 telephone jack at the other end. The wiring is as follows:
APPENDIX D – MAPS OF TIME ZONES 35
Page 1 and 2: INSTRUCTION MANUAL NexStar 80GTL
Page 3 and 4: Observing the Sun .................
Page 5 and 6: 9 8 10 7 6 11 The NexStar 80GTL Ref
Page 7 and 8: 3. From underneath the tripod suppo
Page 9 and 10: not damage the glass window or your
Page 11 and 12: Note Attaching the Hand Control The
Page 13 and 14: Important 10. Scroll Keys: Used to
Page 15 and 16: 1. Once the NexStar is powered on,
Page 17 and 18: • To slew to the object displayed
Page 19 and 20: Helpful Hint objects are relative t
Page 21 and 22: MENU TRACKING MODE ALT-AZ EQ NORTH
Page 23 and 24: Determining Field of View Determini
Page 25 and 26: •Sunspots: Dark regions of the su
Page 27 and 28: While your NexStar telescope requir
Page 29 and 30: Filter, Light Pollution Reduction -
Page 31 and 32: GLOSSARY OF TERMS A- Absolute magni
Page 33: Terminator The boundary line betwee
Page 44: Celestron 2835 Columbia Street Torr

INSTRUCTION MANUAL NexStar 80GTL - Celestron

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