Comments on the LX200 writeup

10.1.2

The 12" ROM version is different than the 7", 8", and 10" version. These three are 3.xx, the 12" is 4.xx, and the 16" is 6.xx


10.1.3

In the second paragraph you have the phrase: " a good bit less accurate". In fact most of the objects have the correct location. There was a problem, however, with four of the positions for the first 250 stars and the GCVS catalog. I would suggest rephrasing to be ' ROM versions before 3.34 have some object position errors, see the Mapug archives for details."

In the last sentence of that paragraph, chips only are required if upgrading from a 3.XX ROM version. A board and keypad upgrade is required if upgrading from a ROM version earlier than 3.00.

10.7.1

You need to add "and longitude" to the end of "Here SIDE denotes sidereal time, which is calcualted for you; you only have to enter the local time"

As I noted in the Autostar, the LX200 want you to enter the number you add to local time to get UT.

I would suggest adding a comment that unless you need local time, setting the clock to GMT/UT a with an Hours from GMT of +00 is the simpliest solution.


10.8.1

Last paragraph before One-star Alignment (Known site). The RA/AZ angle is not thrown off by motion during start up. The system accounts for this angle (you can actually see it back up once it finds the zero point on the worm.

Under Two-star alignment (known site) later in the section. If you press GOTO after selecting the second star, the LX200 will slew you to the approximate star location (ROM version x.34)

Under Alignment on Polaris and one additional star You should add that if the second star (the one selected by the LX200 is hidden, then press enter when prompted, select another star that is visible, goto it, center it using N, S, E, and W, then sync on it. This is equivalent to having had the LX200 pick your selected star as the second star.

10.12.2

footnote: The original Meade ads did claim the list was complete (the vendor they used claimed it). Later ads revised this to say all variable stars with minimums brighter than 16.5, as you noted. And in fact the list is dynamic.

10.15

Second paragraph, the LX200 has permanent PEC for the RA axis and for both axis on the 16". The PEC for the 16" is not easily field updatable For the 7", 8", 10", and 12", DEC training is lost on power off.

In the last paragraph in the section, add that the CCD update cycle should be less than 1 second.





Ralph

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