Leica MX400 Operating Instructions Manual page 150

Configuration
are available to you for most or all of the records:
All:
Checksum On or Off;
NMEA 0183 version 2.1 requires that the checksum is
present. Versions 1.5 and 2.0 do not require the checksum.
The receiver provides you the option of turning the
checksum on or off to provide flexibility in interfacing. It
has been our experience that some of the equipment you
will interface with may not correctly decode the checksum,
or may require the checksum.
Output Rate maximum once per second, unless the Multi-Herz
option is installed. Refer to the Total Load Is section which
follows.
Note: All position information contained in any data
record is output in the local datum selected in
CFG Position; except GGA, which provides a
selection in the Details screen to output in
either WGS-84 or the datum selected in CFG
Position.
Most:
NMEA Version
Some of the NMEA 0183 records are no longer supported
by version 2.1. However, you may have an autopilot,
plotter, or other older model equipment which does not
support the newer version of the NMEA 0183 standard. The
receiver provides you the flexibility to interface using older
versions of the standard to support these devices. Likewise,
you may be outfitting your boat with all of the latest and
greatest equipment, for which the newer standards introduce
new data records which you will want to take advantage of.
Therefore, the receiver provides support of the latest NMEA
0183 version (2.1). Where a data record is available in more
than one version of the standard, the receiver allows you to
make the necessary choice.
Version 3.3
Operator's Manual
137