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laptop usb/serial connection

I am running Win10 64bit on a laptop with Starry Night Pro 7

The Telescope is a Meade 8" LX200R GPS with AutoStar II #497 Hand Controller

I have tried both a Prolific and Keyspan USB to serial adaptors and they both work correctly using a loop back test.

I set the COM port number in Starry Night.

When connecting in Starry Night to the telescope it comes back with a message saying ~does not appear to be connected to anything".

Is there any way to test the LX200 GPS RS232 port to confirm it is working?

Can you help with connecting my LX200?






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