LG 60PX4DR Training Manual page 94

CABLECARD
Protected by
Protected by
Cable System,
Cable System,
Conditional
Conditional
Access System
Access System
DCR(Host)
QPSK Tuner
& Demod
QAM Tuner
& Demod
Most but not all, CADTV (Cable Digital Television) channels are scrambled and or encrypted. Therefore
decryption is a part of a premium package the customer pays for. There are a few channels the cable
company has to provide as open channels. This allows the customer who purchases an HD ready TV
that is capable of processing QAM to recieve a few HD channels thru the cable system. In LG units
there are two ways the channels are displayed, as 2 part channels (EX: 107-1) and as single part
channels EX: 107. With the Cablecard inserted the CADTV map will show only single part channels.
Without the card installed the CADTV map will show two part channels. Due to this it will be in the
ASC's best intrest to have a constantly updated channel lineup showing which are scrambled and
which are open channels for all the headends in the area you service product. A good relationship
with the local cable company is crucial to this so you are kept up to date with fast changing channel
lineups. This can prevent you from trying to repair a product that is not defective. EX: The customer
complains they no longer recieve CH 186 which was Discovery HD a scrambled channel. The real cause
is the headend moved that channel to CH 205 and CH 186 is no longer in the channel map. All this
occurs through the OOB channel.
Plasma Training
CableCARD
CA Decrypt &
CP Encrypt
CA-Encrypted Stream
CableCARD
CableCARD
CP-Encrypted Stream
CP
Decrypt
Clear Stream
94
Protected by
Protected by
- CP
- CP
System
System
1394 + 5C
MPEG2
Demux
& Decode
CPU
User I/F
OS, Memory
CableCARD