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Maintenance and Troubleshooting
frequency (for domestic C-band satellites, this is 5150 minus the downlink frequency in
MHz). To rule out (2), try connecting the RF cable to another RF port and select that port (or
use RF Switch Bypass to force that other port). To rule out (3), try using another IRD.
2. If the first alarm message is "No Carrier Lock", verify the RF Feed Port, Carrier Frequency,
Data Rate, FEC Ratio, and ID Tag (if Tags are in use) settings. Also verify that the LNB LO
frequency setting (in the IRD) is correct for the selected RF feed port.
3. If the alarm message is "RF signal overload", then reduce the carrier power entering the
Unity 4600
the RF circuit between the LNB and the IRD.
LEDS:
The Unity 4600 may not be authorized for the network's Conditional Access. If the
LED is OFF and the alarm message, "Unauthorized for CA" appears, contact your network
provider to gain authorization in its Conditional Access database.
Missing an
LEDS:
audio, video,
Check the front-panel display for alarm or warning messages. Table 4.1: Alarm and
or ASI output
Warning Descriptions
while others
the message definitions are too technical to help debug the problem, report the messages
are okay
to your network provider.
LEDS:
If no alarms or warnings are shown, suspect a bad connection or mis-programming of the
Unity 4600
1. If audio or video are missing, check at the front-panel monitor jacks. If okay on the front
monitors, check the signal connections from the rear of the unit to the destination. If an
audio is missing from the rear panel outputs and cannot be detected at the front-panel
monitors, check that a valid audio stream is selected for that port and that the network
provider has supplied non-quiet programming on that audio.
2. If the ASI output is missing, check the signal connections from the rear of the unit to the
destination. If okay, check with the network provider to verify what Program Mapping
(Release 2 or later) may be in effect.
4.3 Alarms and Warnings
The alarm and warning system is intended to alert the local user of a present or impending
loss of services. Table 4.1 below lists many (but not all) of the possible alarm and warning
messages that the Unity 4600 may display. For problems you cannot resolve on your own,
please contact Wegener Customer Service (see Chapter 5), and be prepared to describe
your signal setup, Unity 4600 configuration, and any displayed alarm and warning
messages.
Alarms
An alarm is asserted when the unit is unable (or presumed to be unable) to perform a
required function or deliver required services.
Warnings
A warning is asserted when an alarm condition is imminent or to indicate other conditions
requiring user attention.
52
. Either add in-line attenuation (a splitter will do) or remove line amplification in
ALARM
CARRIER
ON and
ALARM
WARNING
or
on page 53 describes Unity 4600 alarm and warning messages. If
ALARM
WARNING
and
:
800032-01 Rev. G
ON
ON
OFF
AUTH
www.wegener.com
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