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NMEA Combiner (PNOLE) Error Codes - an explanation  Created:
06/25/2007 Modified: 06/25/2007   This technical document
outlines the information output by the 312 and 315 built-in NMEA
combiner under input error conditions. In order to observe these
error codes, you must run HyperTerminal and monitor the NMEA
combiner output port (com4). The NMEA combiner uses the special
NMEA 183 sentence “PNOLE” to output combiner status.  The PNOLE
sentence identifies the channel(s) in error and error type(s)
with an alphanumeric code. The format is as follows:  The error
message is sent only once each half second when errors are
present. The message will contain a summary of all channels with
errors and error types which occurred during the previous half-
second interval.  Channel Codes The channel(s) in error (GPS,
Depth, Autopilot Input) and the