SETUP
ProMARK X
3-4
Key in the longitude, then use the
RIGHT ARROW
to toggle between E
and W hemispheres. Press
ENTER
.
SETUP 2 — Selecting Mode and Entering Altitude
. The ProMARK X has
three modes of operation. The default mode is 3D, which uses a minimum
of four satellites to determine position. It is used primarily on land. The 2D
mode uses three satellites to calculate position; 2D requires a user-entered
value for altitude and is used primarily at sea and when altitude is known.
Automatic switches from 3D to 2D when there are insufficient satellites
visible for a 3D fix, and returns to 3D when more satellites become available.
AUTO is not recommended for the differential functions discussed later in
this manual.
Access SETUP 2. Press the
RIGHT ARROW
to select a mode of operation.
Key in an altitude (MSL) in meters. It should be accurate to
±
5 meters,
±
1 meter if you will be using differential. (An existing value can be
deleted by pressing
CLEAR
or by entering a new value.) Use the
RIGHT
ARROW
to toggle to a negative altitude. Press
ENTER
.
The default is MSL (mean sea level) in meters. To enter altitude in HAE or HAG
and feet, you must first select the appropriate settings with SETUP 9 and
SETUP 10. If you know your altitude in MSL and meters, go ahead and enter
it now. The unit will convert all stored altitude measurements to the selected
altitude reference and unit of measure when they are changed.
Regardless of the operation mode you select, this step
must
be completed.
Failure to enter an altitude will cause the unit to assume that the initial
altitude is 0 (sea level), which may prevent the unit from obtaining the best
accuracies possible. Altitude can be entered at any mode screen.
NOTE
The unit can accept altitudes up to 57,415 feet (17,500 meters).
If you are using an external antenna, be sure you enter antenna altitude
(altitude plus antenna height).
SETUP 3 — Setting the Time
. The GPS satellites operate on GPS time,
which is within a few seconds of Universal Coordinated Time (UT). UT is the
time and date that is current at the Prime Meridian, which runs near
Greenwich, England.
Summary of Contents for GPS PROMARK X
Page 4: ......
Page 10: ...vi...
Page 14: ...Introduction ProMARK X 1 4...
Page 92: ...Attributes ProMARK X 6 8...
Page 188: ......
