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Article Number: SBKB-10-10003 Meade Autostar Ignores Tenths of an Arc Minute in Right Ascension
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Information in this article applies to:
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| Symptoms |
| When communicating with the Autostar
version 1.3 via its built-in serial port, the Autostar ignores tenths of
minutes for the set object right ascension ":Sr HH:MM.T#"
command.
To duplicate this behavior, run HyperTerminal (9600, 8, None, 1, No Flow Control) and send the ":Sr HH:MM.T#" command immediately followed by the get object right ascension command ":Gr#" to retrieve the value just set. The retrieved value will not match the set value if right ascension's tenth of a minute is non zero. Here is sample HyperTerminal output: :Sr 20:12.2#1 :Gr#20:12.0# The set object right ascension command is how the Autostar is instructed to slew and sync on an object. The coordinates of the Autostar will not match the coordinates that were sent to it if tenths of a minute right ascension are required.
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| Cause |
| This is a limitation with the Autostar
version 1.3 and can result in fifteen arc-minutes of inaccuracy when
this device is controlled via the serial port.
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| Resolution
None.
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| More Information
Contact the telescope's manufacturer to determine if an updated version of the firmware is available. |
| Modified: July 26, 2004 |
