Справочник Пользователя для EMS Technologies Canada Ltd. HSD-X

This section provides basic information required for technical personnel to isolate faults 
in HSD and HSD-X transceivers. Where needed, refer to other sections of this manual 
(which contain important information to aid in understanding the functionality of the unit) for 

 

additional information. 

Fault isolation procedures are usually conducted on equipment that falls within one of the 
following categories:

•

Units that have failed to pass operational and installation verification procedures

•

Units that have failed during service

•

Units repaired and returned to service

Maintenance reports are helpful in troubleshooting the HSD system. Capturing 
maintenance port information from the HSD or HSD-X transceiver and forwarding the file 
to EMS SATCOM technical support staff will assist in troubleshooting suspected HSD 
system problems. Instructions on how to activate and save “reports” information is 
provided in the next section.

No dial tone 
heard in 
handset

–

–

•

Confirm ISDN lines are 
wired correctly.

•

Verify handset connection 
is secure.

•

Wait a few minutes for the 
system to warm-up, then 
log-on and try your call 
again.

•

Check that IRS data is 
available.

•

Verify that the unit has 
completed beam 
registration.

Call drops 
after 
successful 
connection

If the RF signal fades 
significantly (during a call) 
the connection may drop
Note: A sudden, severe 
aircraft banking angle may 
obstruct the signal

Activate report 21

 

and 23

•

Check signal strength 

 

(C/No 

≥ 50 dB). 

•

Ensure there is a clear, 
un-obstructed, 
line-of-sight to the satellite.

•

Select an alternate satellite 
or beam and try your call 
again (Note: works if you 
are located where more 
than one beam overlaps or 
satellite is 

 

in-view).