Leica MX400 Operating Instructions Manual page 152

Configuration
xxx Loads The Port By:
The NMEA 0183 standard limits the port baud rate to 4800
bits per second. It is impossible to turn on every NMEA
0183 data record on one port in the receiver at a once per
second output rate, due to the NMEA standard limitation.
xxx Loads The Port By tells you how much port throughput
capacity is required to send the selected data record out the
port (where xxx is the NMEA data sentence identifier). If
you change the Output Rate, xxx Loads The Port By value
will adjust to reflect the change after you move the cursor to
the next line. This is a very helpful tool to ensure that you
don't loose data due to lack of throughput on the data port.
Total Load Is:
Due to the throughput limitation of the NMEA 0183
standard, you can not turn on all of the output records
available from the receiver at a once per second output rate
at one time. The Total Load Is will help you maximize the
port usage on the receiver. It monitors the total throughput
capability of all the output records that are currently turned
on. If you go over 100%, and you require all of the data
records that are currently turned on, try reducing the Output
Rate for one or more of the less critical data records.
Continue this process until the total load is 100.0% or less.
There are several special case screens which provide added support.
Rnn - Active Route Data Record:
The NMEA-0183 standard allows you to output the active
route with an ID sentence that begins either as GPR00 or
GPR01. Some of the equipment you might interface may
require this sentence to outputs R00 and other equipment
may require this data record as R01. The receiver allows
you to configure the ID either way (R00 is the default).
Version 3.3
Operator's Manual
139