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Unity 4650 User's Manual
LEDS: ALARM ON and CARRIER OFF
No audio or
video output
The U4650 is unable to lock to an RF carrier at the selected RF port:
a) If the first front-panel alarm message is "No RF Signal", then: (1) either
b) If the first alarm message is "No Carrier Lock", verify the RF Feed
c) If the alarm message is "RF signal overload", then reduce the carrier
LEDS: ALARM ON and CARRIER ON
The U4650 may not be authorized for the network's Conditional Access. If the
AUTH LED is OFF and the alarm message, "Unauthorized for CA" appears,
contact your network provider to gain authorization in its Conditional Access
database.
LEDS: ALARM or WARNING ON
Missing an
audio or
video output
Check the front-panel display for alarm or warning messages. Table 8: Alarm
while others
and Warning Descriptions on page 75 describes U4650 alarm and warning
are okay
messages. If the message definitions are too technical to help debug the prob-
lem, report the messages to your network provider.
800034-01 Rev. A
the outdoor antenna LNB is not operating or is not connected to the
IRD at the selected RF port; or (2) the selected IRD RF port has failed;
or (3) the IRD receiver card has failed. To rule out (1), verify that the
LNB (and any intermediate line amplifiers) has DC power and trace the
connection from the LNB to the IRD or try replacing the LNB. If a
spectrum analyzer is available, look for the carrier at the L-band
intermediate 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.
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.
power entering the U4650. Either add in-line attenuation (a splitter will
do) or remove line amplification in the RF circuit between the LNB and
the IRD.
74
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