Leica MX420 Operator's Manual page 136

Operator's Manual Configuration
you a good clue as to the satellite geometry.
Auto 2D/3Dis
the
default setting.
3D Only:
This selection causes the receiver to provide a position
fix only when the HDOP and VDOP values or the number of
satellites allows a 3 dimensional position to be calculated.
2D:
This selection is not accessible to the user. The MX420 uses
this mode in the
Auto 2D/3D
mode only when the number of
satellites available does not allow for 3D position calculation.
The antenna height you entered is used for the vertical por-
tion of your position fix.
Antenna Height Unit:
This selection determines the unit ofmeasure for the antenna height
calculation. Available choices are either
Meters
(default) or
Feet.
Antenna Height:
This is the antenna height above Mean Sea Level (MSL) that you
enter for 2D mode positioning, 5.0 meters is the default value.
To
achieve maximum position accuracy, it is important to enter an
accurate value ofthe antenna height above JvfSL. You can verify
your current positioning mode and altitude in the POS
POS2
and
POS3
screens.
Reference System:
This setting controls the coordinate system used to display your
position. The available choices are
Lat/Lon
(default),
UTM
(Uni-
versal Transverse Mercator), or
Loran
C. The receiver will auto-
matically convert any waypoint in the Route Bank or Waypoint
Bank when a different coordinate system is entered. Note that when
you select a coordinate system other than
Lat/Lon,
data in the
NMEA 0183 records will remain in the LatILon format, as defined in
the NMEA 0183 standard.
When you select
UTJ'v/,
you can set the
Zone
yourself
(Man),
or let
the receiver calculate the zone for you
(Auto,
default).
Likewise, when you select Loran C, you can set the
Chain
yourself
(Man),
or let the receiver calculate the chain for you
(A uta,
default).
Alarm For High HDOP:
This allows the receiver to create an alarm for HDOP values which
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abo.:c '"
nur.iucr
that you determine. "f
hIS
indicates that posi-
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Version 7.5