Leica Geosystems GPS System 500 - Technical Reference Manual - Manual (Page 255)

255 9. The CONFIG Key Technical Reference Manual-4.0.0en
The PPS Out interface enables you
to configure the PPS (Pulse Per
Second) output port and parameters.
This function is available only if the
necessary hardware exists.
Select PPS Out and press EDIT (F3).
Set PPS Out to Yes.
Set the PPS Rate at which the pulse
shall be output. Select between 0.1 -
20 seconds.
If an external device is connected to
the sensor an OWI or LB2 message
can be transmitted at the time the
PPS is output. Change Notify msg to
ASCII (OWI) or Binary (LB2) and
press NPORT (F5) to select the port
and device through which the mes-
sage shall be transmitted.
9.16 Interfaces - PPS Out
The ASCII message takes the following format:
$PLEIR,HPT,sssssssss,nnnn*hh<CR><LF>
Format Content
$PLEIR, Header
HPT, Message identifier (High Precision Time)
sssssssss, GPS time of week of next PPS pulse (in msec)
nnnn GPS week number
*hh Check sum
<CR> Carriage return
<LF> Line feed
The message will be sent at least 0.5 seconds prior to the next pulse. For
this reason messages are only sent when the PPS rate is greater than 1sec.