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4 Front Connectors GNM181 GNSS Multi Band Receiver
4.1 Status LEDs GNM 181
LED Indicators
Init
blue:
while the receiver passes through
the initialization phase
green:
the oscillator has warmed up
Nav.
green:
positioning successfully
Ant
red:
antenna faulty or not connected
yellow:
the clock is synchronized by an external
Signal - MRS mode (PPS, IRIG ...)
Fail
red:
time has not synchronized
Fail
Ant.
Nav
.
Init
4.2 Multiref COM 0
The COM 0 interface of the GNM 181 is used for serial communication (RS-232 signal level). It can also be
used as an optional "Multiref" interface for the reference signal PPS + String.
Assignment:
Pin 2: RxD (receive)
Pin 3: TxD (transmit)
Pin 5: GND (ground)
Reference signal via 9-pin DSUB connector
(PPS + String Mode)
Pin 1: PPS
Pin 2: String
*
*
The following timestrings (time telegrams)
can be used:
NMEA RMC
NMEA ZDA
Meinberg Standard
Uni Erlangen
COM
IMS-GNM181 Setup Guide
Date: 25th February 2020
7
Содержание IMS-GNM181
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