EMS Technologies Canada Ltd. HSD-MK2 Manual Do Utilizador
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
eNfusion® HSD-440 Mark 2 Terminal
23-15-30
3-16
3 JUN 10
5. Passive Intermodulation (PIM) Test
This section describes the passive intermodulation (PIM) test. You must execute the PIM test
after installation, if theHSD-440 Mark 2 Terminal operates in SwiftBroadband mode.
after installation, if theHSD-440 Mark 2 Terminal operates in SwiftBroadband mode.
A. Overview
To meet Inmarsat requirements for SBB operation, the HSD-440 Mark 2 Terminal can
test for passive intermodulation effects. The PIM test verifies that the transmit signal from
the HSD-440 Mark 2 Terminal does not degrade or interfere with the receive signals as
a result of PIM.
test for passive intermodulation effects. The PIM test verifies that the transmit signal from
the HSD-440 Mark 2 Terminal does not degrade or interfere with the receive signals as
a result of PIM.
The HSD-440 Mark 2 Terminal can only perform the PIM test when the aircraft is on the
ground.
ground.
When theHSD-440 Mark 2 Terminallogs on to the SBB network, the network assigns the
terminal two channels for PIM testing. These channels are not used by other terminals
so that theHSD-440 Mark 2 Terminalcan transmit the test frequencies without interfering
with other satellite communication equipment or the Inmarsat satellite.
terminal two channels for PIM testing. These channels are not used by other terminals
so that theHSD-440 Mark 2 Terminalcan transmit the test frequencies without interfering
with other satellite communication equipment or the Inmarsat satellite.
NOTE: You can monitor the progress of the PIM test by turning on report 208 in the
HSD-440 Mark 2 TerminalMPU. When report 208 is not running, the terminal
displays only the results of the test, not the progress.
displays only the results of the test, not the progress.
B. PIM Requirements
In order to successfully perform the PIM test, the aircraft and the satellite communication
system must meet the following requirements:
system must meet the following requirements:
•
The HSD-440 Mark 2 Terminal must have successfully logged on to a satellite that
is visible at the test location within the last 168 hours (8 days).
is visible at the test location within the last 168 hours (8 days).
•
The aircraft must not be near any sources of PIM, such as hangars and towers.
•
The aircraft must be facing due north in the northern hemisphere, and due south in
the southern hemisphere.
the southern hemisphere.
C. PIM Test
To start the PIM test:
1. In theHSD-440 Mark 2 Terminal MPU, navigate to Menu 30.
MENU 30 FIRMWARE Vx.x GND
L list PIMBIT parameters M initiate manual PIMBIT
F fakeout PIMBIT parameters P initiate/stop PIMBIT
<CTRL> N next menu <CTRL> O previous menu = select reports
2. To start the PIM test, press p.
The PIM test starts. The test takes about five minutes.