EMS Technologies Canada Ltd. HSD-400 Manuale Utente

(6) System On-Air Checks

Conduct system on-air checks to confirm voice and data call capabilities through the 
satellite and ground station (LES) network. Additional testing confirms that proper 
signal level parameters are obtained through the antenna subsystem.

(a) Preparation

Before attempting on-air testing procedures:

 1. Complete and confirm all service provider registration and activation. 

 2. Complete and document all pre power-up and power-up checks.

 3. Position the aircraft outside, away from all obstructions in the line-of-site to 

the satellite used.

 4. Apply the aircraft power source.

 5. Power on and wait for the IRS to align.

 6. Connect a computer (with a terminal emulation program) to the HSD-400 

terminal maintenance port.

Note: Several system parameters, such as IRS data, RF signal quality, and 

log-on messaging, appear on the maintenance port display. Capture and 
save this maintenance port information to a file for later review or to serve 
as an historical test record.

(b) On-Air Power up and Logon Procedure

For this test procedure, use the Level 2 maintenance password to access the 
HSD-400 terminal Maintenance Utility Program. For information on how to 
connect, access, and use the MPU program, see "Connection Requirements" 
on page 4-2.

 1. With the computer connected, powered-up, and ready to accept 

maintenance port data, power up the HSD-400 terminal.

 2. Once the power up messages appear, enter the Level 2 password maint
 3. To access the reports menu, press EQUAL SIGN, and then activate report 

items 21 (call codes) and 23 (standard output). 

Remember to save these selected items by pressing S (save to EEPROM).

 4. To reset the HSD-400 terminal, in menu 2, press Z, and then immediately 

type the password maint when the reset message appears.

The data from the previously selected reports 21 and 23 appears. This data 
refreshes on-screen every second. For easier reading of the data, capture 
this information in a log file for later review or pause the display by pressing 
SCROLL LOCK or by highlighting part of the viewed data.

 5. Compare the output data to the sample shown in Figure 4-20.

Several parameters need to be reviewed and documented for operational 
verification purposes. Refer to the "Installation Checklist" on page E-1 for a 
detailed list of parameters.

 6. Verify that the following system information, as shown on the System 

Initialization Display during the test, is accurate for the HSD-400 terminal 
under test.