2 Overview
18 DSM 132/132RS Receiver User Guide
22.4 Receiver input / output
The DSM 132 standard power/data cable (PN 30945) connects to the
receiver ports to supply power. It also enables the following data
exchanges:
• ASCII, TSIP, and RTCM input from an external device.
The receiver is able to receive ASCII data from an external
device, convert this data into an NMEA message, and export
that message to another device. TSIP command packets
configure and monitor GPS and DGPS parameters. The receiver
is also able to accept RTCM data from an external device, such
as a pager.
• RTCM, TSIP, and NMEA to an external device.
The receiver is able to output RTCM in base station mode
(requires the base station option). When you are using an
external radio, it can also receive DGPS corrections. TSIP is
input/output when communicating with HYDROpro. NMEA is
output when the receiver is exporting GPS position information
to an external device or navigation software.
For more information on the NMEA (National Marine
Electronics Association) and RTCM (Radio Technical
Commission for Maritime Services) communication standard
for GPS receivers, go to the following websites:
–www.nmea.org
–www.rtcm.org
• 1 PPS output
To synchronize timing between external instruments and the
receiver’s internal clock, either one of the connection ports
outputs a strobe signal at 1 PPS (pulse per second). To output
this signal, the receiver must be tracking satellites and
computing GPS positions.