RE: Telescope Control Software for Satellite

From: Derek C Breit (breit_ideas@hotmail.com)
Date: Sat Mar 22 2008 - 17:02:34 UTC

  • Next message: Brad Young: "BY Obs Mar 22"

    Excellent.. We will find out when my USB - RS232 converter arrives early
    next week...
    
    I already have a working serial to RS232 cable..
    
    Derek
    www.poyntsource.com/New/index.htm
     
    
    
    -----Original Message-----
    From: Björn Gimle @GlocalNet [mailto:bg_26934@glocalnet.net] 
    Sent: Saturday, March 22, 2008 2:58 AM
    To: SeeSat-L@satobs.org
    Subject: Re: Telescope Control Software for Satellite
    
    
    The phone jack should be output from an internal modem,
    ie modulated 56 kbs tones, AFAIK.
    LX200 uses RS-232 standards, ie voltages.
    
    My laptop has the same "deficiency", but there are cheap USB-RS232C
    converters available in electronics/hobbyists stores (~$30 in 
    Sweden).
    
    These are usually on short cables.
    I haven't seen one for the PC card slot, and those are
    being phased out for a new (similar, improved) standard.
    
    There is one more project: finding the correct cable!
    
    I did not get one from a shop, and anyway Meade info
    hints that you also need a null modem in the connection!
    So I compared available cable specs on the web, and
    chose the one which most clearly described it, and
    contained no evidence that also null modem was required.
    I found http://obs.nineplanets.org/meade/cable.html
    
    I used an ordinary modem cable to fit the converter, and
    a long telephone cable (RJ-11?) with four (coloured) wires.
    I cut them near one end, and connected the wires,
    carefully checking with an ohmmeter that I picked the
    right ones.
    
    /Björn
    
    ----- Original Message ----- 
    From: "Derek C Breit"
    Subject: RE: Telescope Control Software for Satellite
    
    
    That worked perfectly.. Thanks..
    
    It has just dawned on me that I have never used this laptop to control my
    LX200 and that it does not have a serial port..
    
    Maybe the empty Network "phone jack" will work directly with the RS-232
    port???
    
    Or something that slides into the laptop card slot??
    
    Seems I have just found my next project.. Like I did not have enough of
    those!
    
    Derek
    www.poyntsource.com/New/index.htm
    
    
    
    -----Original Message-----
    From: Björn Gimle @GlocalNet [mailto:bg_26934@glocalnet.net]
    Sent: Friday, March 21, 2008 1:43 PM
    To: SeeSat-L@satobs.org
    Cc: Derek C Breit
    Subject: Re: Telescope Control Software for Satellite
    
    
    You don't even have to copy the elset files, just
    "Open File" from the bottom row, middle!
    SatTrack will remember the directory AND the file name
    to next run.
    
    I had a similar problem, but didn't investigate it, since I find manual
    download from SpaceTrack easy enough.
    
    ----- Original Message ----- 
    
    Hmmmm.. I cannot get Satellite tracker to download the TLE's..
    
    Can I copy the elements from the Heavensat directory, which downloads them
    fine???
    
    
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