Installation Manual

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NOMAD MXU Installation Manual
3:36 PM 02/12/99
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If steps 1,2,3 and 4 are not correct the telephone line may be at fault”
Go to section 6.2 “Telephone Problems”
Line # 3 Telephone connection check:
Dial the phone number for MXU line #3 and verify the following:
1. Listen on the test phone and verify the MXU picks up the phone.
2. Observe the MXU front panel and verify the “Line 3” LED” lights.
3. Listen on the test phone and verify the modem tone occurs, (may take up to 1 minute).
4. Hang up the test phone, the MXU front panel “Line 3” LED should go out.
If steps 1,2,3 and 4 happened, the connection is valid.
Go to “Line # 4 Telephone connection check”
If steps 1,2,3 and 4 are not correct the telephone line may be at fault”
Go to section 6.2 “Telephone Problems”
Line # 4 Telephone connection check:
Dial the phone number for MXU line #4 and verify the following:
1. Listen on the test phone and verify the MXU picks up the phone.
2. Observe the MXU front panel and verify the “Line 4” LED” lights.
3. Listen on the test phone and verify the modem tone occurs, (may take up to 1 minute).
4. Hang up the test phone, the MXU front panel “Line 4” LED should go out.
If steps 1,2,3 and 4 happened, the connection is valid.
Go to “Section 5.3, Monitor Station Checkout”
If steps 1,2,3 and 4 are not correct the telephone line may be at fault”
Go to section 6.2 “Telephone Problems”
5.3 Monitor Station Check (Optional)
It is possible to configure a user supplied personal computer (PC) to interface with the NOMAD MXU
console through the RS232 connector on the front panel, This will enable the user to monitor MXU
activities and retrieve diagnostic logs from the MXU. For details on setup and operation of the monitor
station refer to the administrative manual.
5.4 Satellite Link Checks (Optional)
If the “Ready Light came on during the power up sequence described in section 5.1, at least one channel
exists between the NOMAD MXU console and the Iridium satellites. There are several ways to determine
if all RF channels, antenna, coax cables, and the RF side of the MXU console are operating correctly.
Methods 1 and 2 are preferred for verification but method three can be used for verification or isolation of
the problem to either the antenna and coax, or to the RF portion of the MU console.
1. If the user setup the monitor station, described in section 5.3, the diagnostic logs can be retrieved and
the signal strength between the satellites and the MXU can be verified. Refer to the Administration
Manual for details.
2. If the user did not setup the monitor station, the Gateway can retrieve the diagnostic logs, over the
PSTN modem connection, and inform the user of the status of the Iridium channels. Refer to the
Administration Manual for details. If one of the channels is not present or has a weak signal refer to
section 6.3.
3. If the Ready LED on the MXU’s front panel came on, all four RF channels can be verified without a
diagnostic log as follows.
First Step: We need to determine the good and bad RF channels as follows:
a. Power Down the MXU
b. Disconnect all the antenna cables but one, from the back of the MXU.