Teledyne Echotrac E20 Operator's Manual page 28

INSTALLATION
If multiple time sources are active, the E20 self-prioritizes the order as follows:
1. GPS
2. NTP
3. SBES UI time
If one source drops out, the E20 will try to switch to the next active priority. If there is an
identifiable large time gap between these sources (several seconds), the E20 will not use
the secondary source, but will flag a time issue. If accepting the large time mismatch and
switching to this source, the operator is advised to toggle the source off and on to restart the
time synchronization process.
4.4.3.1 Synchronize to the SBES UI PC
To use the SBES PC to control time synchronization, follow this method:
(a) Connect the UI with the UI from the PC that should provide the time source, and enable the
time source and click the button Use this PC.
(b) Wait a few minutes for time to synchronize.
4.4.3.2 Use an NTP Server
To use an NTP server for time synchronization, follow this method:
(a) Enable the time source to enter a local or networked address for the NTP server.
(b) Wait a few minutes for time to synchronize.
4.4.3.3 Use a GPS Receiver
To connect a GPS receiver for time synchronization and position logging, follow this method:
(a) Configure the GPS to generate an NMEA $GPZDA sentence every second.
(b) Connect the serial or UDP output to COM1 on the E20.
(c) Connect the PPS output from the GPS to the SYNC connector on the E20.
The E20 cannot use the raw ZDA string for time without the PPS pulse.
(d) In the SBES UI, select the Sensor tab on the left. Configuration for Position, Motion, and
Output is shown. (See also section 4.4.2 above,)
(e) For Position:
(i) Click on the Serial or UDP port button and select the appropriate serial or UDP port
configuration.
(ii) Click the Format drop-down menu and select NMEA.
(iii) Enable the input via the radio button.
(f) Wait a few minutes for time to synchronize.
Time synchronization of E20 to the UI PC only works, if there is no firewall or routing rules
that prevent the underlying UDP connection.
Echotrac E20 Operator's Manual8
Version 8
p. 28 of 60
Uncontrolled Technology Subject to Restrictions Contained on the Cover Page.
November 25, 2020