What do they stand for?

[PapaJ]

I have a DSX-90AT-TC I was just wondering what all the letters stood for? I know that the numbers stand for 90mm.

[MistrBadgr]

I can tell you part, but not all.

The AT stands for the particular autostar mount.  The AT has been used for quite a while for the single arm altazimuth mounts.  The TC means Time Chip.  You have a chip that is powered by a little quarter size battery that was factory installed.  It is located inside the regular battery compartment.

The DS has been used for a number of different telescopes over time.  I have the mount for a DS-16, which was a 16 inch reflector.  It is a rough and ready, big, heavy, equitorial mount with 1.5 inch shafts.  Currently, the DS-2000 series has the single arm AT mounts with a reflector and a couple compound reflector models.

If your mount is a single arm and your scope is a casegrain type.  They may have added the X to keep from confusing it with the DS-2090-AT-TC refractor that has come and gone a few times.

All of this may have some errors in it.  This is just what I think from what I have observed.

Bill Steen

[PapaJ]

Thank you Bill,I'm still learning,just a beginner/novice,about all the neat stuff about my telescope and what it can do or better yet what I can't do with it.