Applanix POS MV V5 Installation And Operation Manual page 61

GNSS Access
The serial digital port for each GNSS receiver is accessible for upgrading the receiver through the I/O
COM ports. Access to the GNSS serial port is under software control in the same way that other functions
are assigned to COM ports.
PPS Output
The PCS uses the one Pulse Per Second (PPS) signal from a GNSS receiver for internal timing
requirements. A user customizable version of this signal is provided on the connector to allow external
equipment to be synchronized with POS MV. A dialog in MV-POSView allows control of the polarity and
pulse width of the PPS output signal.
The PPS output port is an active circuit. Ensure that an 'input
signal' is NOT connected to the PPS output port, otherwise
damage may result.
The 1PPS signal is a TTL level strobe that occurs at a 1 Hz rate. The leading edge of the strobe is
coincident with the exact GPS second. The corresponding time message that specifies the UTC time of
the 1PPS is available in multiple formats from any COM port by selecting the desired configuration
through MV POSView. Refer to the GNSS Timing Basics description starting on page H-2.
Ethernet Connector
A 10/100 Base-T Ethernet interface provides communication between the PCS and other PCs for
monitoring or controlling the system. The Ethernet port can also be used to transmit POS MV data to a
host PC for real-time processing or for data logging and subsequent post-processing with POSPac MMS.
The Ethernet port supports both Transmission Control Protocol/Internet Protocol (TCP/IP) and Universal
Datagram Protocol (UDP).
Physical Interface
An Ethernet cable is supplied with the POS MV system: a shielded straight through cable. The Ethernet
interface on the PCS is auto detecting so a cross-over cable is not required. The cable is terminated with
shielded RJ-45 connectors. Ensure that replacement cables meet the RJ-45 Cat5 standard, or better (i.e.
Cat6, Cat6e), to avoid an impedance mismatch. In addition, the maximum cable length is determined by
the Ethernet specification.
Table 11 provides connector pin assignments and mapping.
Copyright © Applanix Corporation, 2017
POS MV V5 Installation and Operation Guide
Installation
2-21