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OK so now I am really baffled.
Just to recap.
1. I have 2x 25foot shielded leads (bought from Scope Stuff) - both are identical, I checked with multimeter & pins 2,3,5 on D9 connector are wired correctly to the RJ12 that plugs into the LX200R. No other pins are connected.
2. The cables are connected to my laptop (Toshiba i7 64bit) by means of a Keyspan USA 19h adaptor. This allows the telescopes to talk to the Sky X pro.
3. Cable “A” that I have had working for years in the observatory connects the LX200R and also my new LX200ACF with the SKY X through Com port 6 with no problems. I can see Keyspan in Device Manager on Com 6.
4. When I change cable and connect Cable “B” then try to connect through SkyX it returns the message “unable to detect device error 203” on both my LX200s..
This simply does not make sense to me as the cable are identically wired – a very a simple 3 wire set. How can the SkyX, or Keyspan seem to know I have changed cables?
There is no cross connection of pin outs either. I cannot see how the laptop can recognise a difference in cable either,
So last night I made a cable from telephone 4 core wire with exactly same connections as per the cable that continues to work – and when I changed the cables over and tried connecting the scope through the SkyX I get the same error message?
I will also puit this on the SkyX feedback site and see if SkyX is the problem (can't see how though).
I have considered an unlikely chance that one of the pins in the LX200 is not making contact with the RJ12 plug but surely not in 2 cables I have tried.
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