[time-nuts] Lucent KS-24361/Z3812A GPSDO initial setup

Hal Murray hmurray at megapathdsl.net
Fri Oct 24 23:55:20 EDT 2014

bob at evoria.net said:
> The mode says "Power-Up: GPS Acquisition", so I guess that's OK.  I think
> things are progressing.  It's attempting to survey, but reporting
> "Suspended: poor geometry".  I suppose with a little more time this will
> work itself out?  It seems to be slowly tracking more sats, as it's now up
> to 5. I wonder if there's a way to shortcut the survey process using
> Satstat?  I've got a 48 hour survey done on this antenna with the LEA-6T, so
> I should be able to input those figures, right?  I'll see if I can find
> anything in a Satstat manual I found. 

Or just wait and see how well the location it finds matches your current data.

The Z3801A manual is easy to find and contains a good description of the SCPI 
commands.  Yes, I think there is a way to load the location and bypass the 
survey.  I think there is a slot in Satsat where you can type in commands by 

You don't need Satsat.  You can talk to it from the command line.  On Linux, 
for a Z3801A, I do things like:
  ln -s /dev/ttyS2 /dev/hpgps1
  stty -F /dev/hpgps1 19200 cs7 parodd parenb igncr
  stty -F /dev/hpgps1 19200 oddp igncr -echo
  On one window:
    cat /dev/hpgps1
On another window:
    echo -e ":ptime:tcode:format F2" > /dev/hpgps1
    echo -e ":diag:gps:utc 1" > /dev/hpgps1 # Needs reboot?
    echo -e ":SYSTEM:STATUS?" > /dev/hpgps1

# fix for week wrap - maybe only works before survey
echo -e ":GPS:INIT:DATE 2011,12,26" > /dev/hpgps1

These are my opinions.  I hate spam.

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