Novatel OM-20000149 User Manual
Installation and Setup
Chapter 2
AG-STAR User Manual Rev 2
18
2.2.2
MKI and PPS Strobes
The Mark Input (MKI) and Pulse Per Second (PPS) strobes provide status and synchronization signals. PPS
is a 3.3V CMOS output; MKI is a 5V logic tolerant input. For more information about the PPS and MKI
signals, see Section A.2, AG-STAR Specifications on page 43.
is a 3.3V CMOS output; MKI is a 5V logic tolerant input. For more information about the PPS and MKI
signals, see Section A.2, AG-STAR Specifications on page 43.
Pin-out information can be found in Table 7, AG-STAR Communication/Power Cable Pinouts on page 47.
2.2.3
Emulated Radar (ER)
The AG-STAR outputs an emulated RADAR signal via the bare wires labeled ER GND and ER_OUT on the
AG-STAR cable. See Table 7, AG-STAR Communication/Power Cable Pinouts on page 47 for the pin-out
details of this cable.
AG-STAR cable. See Table 7, AG-STAR Communication/Power Cable Pinouts on page 47 for the pin-out
details of this cable.
The ER outputs a logic high of supply voltage minus 0.5 V minimum and logic low of 0.5 V maximum with a
rise and fall time of less than 1 ms. The ER output references signal GND and provides logic low output until
the receiver’s speed is greater than 1 km/Hr. ER can be configured to operate at one of three distinct
frequencies (26.11, 28.12 or 36.11 Hz/km/Hr, with 26.11 Hz/km/Hr being the default value) and with an
effective range from 1 km/Hr to 55 km/Hr for near-horizontal applications. See Section B.5,
RADARCFG Configure the ER Output on page 56 for more information.
rise and fall time of less than 1 ms. The ER output references signal GND and provides logic low output until
the receiver’s speed is greater than 1 km/Hr. ER can be configured to operate at one of three distinct
frequencies (26.11, 28.12 or 36.11 Hz/km/Hr, with 26.11 Hz/km/Hr being the default value) and with an
effective range from 1 km/Hr to 55 km/Hr for near-horizontal applications. See Section B.5,
RADARCFG Configure the ER Output on page 56 for more information.
2.2.4
Controller Area Network (CAN)
NMEA 2000 is a CAN standard created by the National Marine Electronics Association and designed to
support networking in marine applications. It functions over a longer physical distance, and supports more
physical nodes than ISO 11783. The relationship between NMEA2000 and SAE J1939 is that J1939 is the
standard, while the NMEA 2000 group has added some new messages (called PGNs or Parameter Group
Numbers) and added a new, additional transport protocol called FastPacket. NMEA2000 compliant, for all
intents and purposes, means J1939 compliant plus support for new NMEA2000 messages. J1939 is
additionally “harmonized” with ISO 11783, a standard for the agriculture industry.
support networking in marine applications. It functions over a longer physical distance, and supports more
physical nodes than ISO 11783. The relationship between NMEA2000 and SAE J1939 is that J1939 is the
standard, while the NMEA 2000 group has added some new messages (called PGNs or Parameter Group
Numbers) and added a new, additional transport protocol called FastPacket. NMEA2000 compliant, for all
intents and purposes, means J1939 compliant plus support for new NMEA2000 messages. J1939 is
additionally “harmonized” with ISO 11783, a standard for the agriculture industry.
The CAN module is generally not user-interactive. It is activated when a SETCANNAME command (see
page 59) is entered, and after a SAVECONFIG, the CAN module is activated immediately on all subsequent
start-ups. The module supports the following NMEA2000 Parameter Group Message (PGN):
page 59) is entered, and after a SAVECONFIG, the CAN module is activated immediately on all subsequent
start-ups. The module supports the following NMEA2000 Parameter Group Message (PGN):
•
PGN 129029 GNSSPositionData (1 Hz)
•
PGN 129025 GNSSPositionRapidUpdate (10 Hz)
•
PGN 129026 COGandSOGRapidUpdate (10 Hz)
Table 4: Available CAN Signals on the AG-STAR
Details about the PGN messages are found in the NMEA2000 specification which can be
purchased directly from the National Marine Electronics Association (www.nmea.org/).
purchased directly from the National Marine Electronics Association (www.nmea.org/).
CAN
Pins
CAN+
Pin 6
CAN-
Pin 7