To set the positioning mode to Auto, use the position_mode command on the command port.
4380A>position_mode auto
[OK] 2015-08-05T15:26:06Z
To set the positioning period, use the position_period command. If not specified, the value
will be in hours. Users can set this value to minutes using the letter m after the value.
4380A>position_period 12
[OK] 2015-08-05T15:26:06Z
Select the proper datum, WGS84 (default) or NAD83, using the datum command.
4380A>datum wgs84
[OK] 2015-08-05T15:28:14Z
Use the settings gps command to verify that the correct datum is being used.
4380A>settings gps
[antenna_delay] 2.650000000000000e-07
[antenna_voltage] 1.200000000000000e+01
[datum] wgs84
[mask_angle] 1.000000000000000e+01
[positioning]
[auto_hours] 1.200000000000000e+01
[manual_position]
[altitude] 1.963545000000000e+02
[latitude] 3.992275796000000e+01
[longitude] -7.758566956000000e+01
[mode] auto
[tracking_timeout] 1800
[OK] 2015-08-05T15:27:19Z
If these settings are correct, type save to save the current user default configuration on the
system to ensure that the system uses the positioning mode and period after a reboot or power
cycle.
If the unit is rebooted, power cycled, or the application is restarted with the positioning mode
set to Auto, the system will go through the process of determining its antenna position based
on the position period (auto_hours). Once that period expires, the system will again set itself
fixed and use the newly determined solution as the fixed position. It will do this each time this
occurs. The phase time difference [ptd] or UTC offset value reported by the system will be
noisier during the Auto position period and will become significantly quieter when the antenna
position is fixed.
In addition to automatically determining its antenna location, the 4380A generates a RINEX
(Receiver INdependent EXchange) format observation file. This file format is a standard used
by the GNSS community and provides all of the necessary GNSS measurements for determining
the antenna location. The file can be retrieved from the system by using ftp (login: ftp,
© 2016 Microsemi Corporation. All rights reserved. SyncSystem 4380A FAQs Version 1.0 (22 Feb 2016)
9
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