Iridium ICHU1000, Installation Manual

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13
Installation
IRIDIUM
0125
Inmarsat equipment
The operating frequency bands of the iridium and Inmarsat systems are neighbours, and it is not in any way by
any technical solution possible to completely separate these bands. This means that interference from Inmarsat
can be expected, especially if the antennas are placed near each other. The distance between the antennas
Should be as far as possible.
If in any way the user experiences trouble using Iridium because of Inmarsat, a filter can be provided as an
option. This filter is placed in a suitable place between the antenna and the transceiver. The filter is a passive
type not requiring external power but the filter loss of 1.2 dB have to be added to the total cable loss between
the transceiver and the antenna. Please contact your dealer for further information.
Antenne cable
Below, please find a table of cables that can be provided by your dealer:
CABLE CONNECTOR
Cable type Part no.
Maximum
length/ 3 dB
loss
Outer
diameter
Minimum
bending
radius
Conn.
type
Part no.
RG 214/U E62.415 8 m 10.8 mm 54 mm N MALE E62.147
SUCOFEED 1/2" HF 77.518 19 m 13.4 mm 35 mm N MALE 79.002
SUCOFEED 1/2" 77.519 30 m 16.0 mm 125 mm N MALE 79.001
SUCOFEED 7/8" 77.520 50 m 27.8 mm 220 mm N
MALE 79.003 &
FEMALE 79.004
2.9 PABX/PSTN Interface
This interface handles and converts 2-wire audio and control signals from/to the PABX into audio and control signals
from/to the LBT. The interface is placed on the control unit BUS, allowing the PABX to act as control unit. The interface
handles the following tasks:
·
generates DC current to the PABX in both idle and active mode
·
generates ringing voltage
·
detects call requests from the PABX
·
detects DTMF tones from the PABX
·
converts audio TX/RX from the Iridium system to a 2-line balanced signal