Et-312 – USGlobalsat ET-312 User Manual
Page 20
ET-312
The Specifications are subject to be changed without notice. Copyright © 2007, GlobalSat Technology.
Page 20 of 21
Version 1.4
0×04=clear memory. Cold start=1
UBYTE
Example: Start using known position and time.
＄PSRF104,37.3875111,-121.97232,0,96000,237759,922,12,3*37
F). Development Data On/Off ID:105 Switch Development Data Messages On/Off
Use this command to enable development debug information if you are having trouble getting
commands accepted. Invalid commands will generate debug information that should
enable the user to determine the source of the command rejection. Common reasons for
input command rejection are invalid checksum or parameter out of specified range. This setting is
not preserved across a module reset.
Format: ＄PSRF105,<debug>*CKSUM<CR><LF>
<debug> 0=Off,1=On
Example: Debug On ＄PSRF105,1*3E
Example: Debug Off ＄PSRF105,0*3F
G). Select Datum ID:106 Selection of datum to be used for coordinate
Transformations
GPS receivers perform initial position and velocity calculations using an earth-centered earth-fixed
(ECEF) coordinate system. Results may be converted to an earth model (geoid) defined by the
selected datum. The default datum is WGS 84 (World Geodetic System 1984) which provides a