User manual

GPSPCI 2/72008 Rev 1.2.1 5 Masterclock, Inc.
• This function allows external devices connected via the DB9 connector to operate in a listen
only mode to broadcast NMEA messages from the GPS receiver.
• This monitor function is always enabled at 9600 Baud
(Note: most GPS receivers support a native baud rate of 4800).
• Monitoring may be done using a simple terminal monitor application such as Windows
Hyperterminal or by writing a custom serial port monitoring application. See Hyperterminal
sample below.
• In addition, the GPS receiver PPS (pulse per second) is available on pin 1 of the DB9 for
synchronizing the data.
• Note: this version of the PCB, V1.2, no longer supports full RS232 communications, or the
GPSPCI RS232 protocol specification. Only native NMEA output messages from the GPS
receiver are available. GPS module configuration can no longer be performed via the
RS232 interface.