MPM-1000A Operator Manual
1000-7075 Rev E
13-6
Table 13-2 General Troubleshooting
(Cont’d)
Symptom
Description
Probable Cause
Corrective Action
Reference FOW
of given spread
factor does not
fit in BW
segment.
Unable to gain
RFOW value.
Insufficient BW to
schedule RFOW.
Increase the satellite BW segment BW or
decrease the RFOW spread factor.
NC could not
schedule
AROW.
Unable to gain
AROW value.
Current link budget
has no resources
left to schedule
AROW burst.
Increase the satellite BW segment power
and spectrum allocation.
Ensure correct Beam ID configuration as
assigned is entered.
Loss of power to
Modem.
Modem will not
power on.
Ensure power switch is on.
Repair or replace faulty cable.
The following table provides some troubleshooting suggestions for satellite link path
loss.
Table 13-2 Link Path Loss Troubleshooting
Symptom
Description
Corrective Action
Computed NC
Uplink/Downlink
path losses are
high
Losses are
higher than
clear sky loss on
a clear weather
day
Check that the antenna is pointed correctly (“peaked”).
Check if the NC transmit gain factor is configured greater than its
actual value.
Check if the NC Terminal G/T is configured greater that its actual
value.
Check if the Satellite uplink G/T is configured greater that its
actual value.
Check if the Satellite transfer gain is configured greater than its
actual value.
Computed NC
Uplink/Downlink
path losses are
low
Losses are
lower than clear
sky loss on a
clear weather
day
Check if the NC transmit gain factor is configured smaller than its
actual value.
Check if the NC Terminal G/T is configured smaller than its
actual value.
Check if the Satellite uplink G/T is configured smaller than its
actual value.
Check if the Satellite transfer gain is configured smaller than its
actual value.
