DEWESOFT V21-1 How-To Guide

Use GPS for Timing and Synchronization
How-to Guide
In the graphic above you see independent measurement systems, synchronised per GPS. Basically
the DEWESoft device needs the PPS (pulse per second) output from the GPS, to correctly synchronize
the AD clock to it. Also a single system can use the GPS time as a timebase for the measurement.
Either internal GPS (DEWE-101, S-BOX) or external GPS (DS-GPS-SYNC) can be used.
This document lists first the different GPS (depending if 1 Hz, 20 Hz or 100 Hz option, internal or
external GPS), then the sync port and timing setup is described.
2. GPS settings
If you already have a DEWE-101 (Minitaur) or S-BOX with integrated GPS, you need to check the correct
GPS setting in DEWESoft first (should be correctly setup by delivery). Go to Settings -> Hardware setup
-> GPS. Depending on the used GPS type one of the following settings will work:
2.1 1Hz internal GPS
For the 1 Hz GPS option the following Init String must be entered in hardware setup to correctly setup
the PPS output. Enable the checkbox "Send init string", then copy line by line sequentially into the text
field.
$PRTHS,U1OP,ALL=0,GGA=1,GSV=1,RMC=1
$PRTHS,PPSG,ENABLE
$PRTHS,PPSO,0,0,500000000
GPS module V21-1 3/15

DEWESOFT V21-1 Specifications

General

Brand	DEWESOFT
Model	V21-1
Category	Control Unit
Language	English