EMS Technologies Canada Ltd. HSD-MK2 User Manual

eNfusion® HSD-440 Mark 2 Terminal

23-15-30

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.

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.

The HSD-440 Mark 2 Terminal can only perform the PIM test when the aircraft is on the 
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.

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.

In order to successfully perform the PIM test, the aircraft and the satellite communication 
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).

 •

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.

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.