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3.4 Connecting the GSM antenna (only GM series)
First ofall finda suitablelocation formounting theGSM antennaoutside of thecontrol cabinet.In
order to find a suitable location with a good reception quality you may use the software MX
Mitsubishi Alarm Editor to display the signal quality.
Screw the antenna plug into the antenna socket on the front of the modem.
NOTE
Standard GSM antennas with an FME plug can be used.The GSM antenna is not supplied
with the modem and can be ordered separately.
Ensure that you buy an antenna with the correct frequency range for your mobile communi-
cations network. Further information on this is provided in the Appendix of this manual in
section 10.4, Mobile communication networks in Europe, USA and worldwide.
If the length of the antenna cable is not sufficient for your requirements you can use a suit-
able extension cable purchased as an accessory from a GSM outlet. Take into account the
attenuationof thesecables thatwill reducethe antennagain andobserve the relevant speci-
fications of the manufacturer.
Connecting the GSM antenna (only GM series) Installation and Mounting
3-5 MITSUBISHI ELECTRIC
Service
Antenna
Power
Process
Line
Data out
Modem Mode
MitsubishiAlarm Modem GSM
mit2xRs232 + 6 I/Os
10- 30 V DC, max. 0.7 A
027954 541034
-
+
COM2
(RS232)
COM1
(RS232)
SIM-Card
Pus
h
Fig. 3-6:
When fitting the antenna plug ensure
that it is seated correctly. It should be
possible to turn the threaded nut easily.