IMAGENEX DT101Xi, Technical Manual

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9. PPS BNC connector
•
Depending on the user jumper settings (see Figure 6-7) the 1PPS input can be provided via either the
GPS or the BNC connector.
•
This optional input receives 0
– 5 VDC logic level 1PPS pulses.
10. GNSS (GPS) Out
•
An additional DB9 port is provided, that outputs buffered GNSS (GPS) data for use with, for example,
navigation software. The RS-232 Clear to Send (CTS) line provides a 1 PPS toggle pulse with a
synchronised 1PPS toggle (Table 6-13):
Panel = DB9 (M)
Pin Direction (Relative to SIR) Function Note
1 In DCD Data Carrier Connect
2 In Rx Recieve
3 Out Tx Transmit
4 Out DTR Data Terminal Ready
5 Out COM Signal Common
6 Out DSR Data Set Ready
7 Out RTS Ready to Send
8 Out CTS Clear to Send
9 In RI Ring Indicator
Table 6-13
•
Communication parameters are set as follows in the SIR unit:
Item Settings
Baud rate 19200
Number of bits 8
Stop bit 1
Parity bit None
Transmitted Strings NMEA ($GPGGA, $GPVTG, $GPZDA)
Table 6-14