User manual

IRD-2900 Series

Professional Integrated Receiver Decoders

Scopus Documents (p/n 100793) Page 3-25

• ASI OUTPUT SOURCE

The ASI Output Source defines the type of output source.

ASI Output Source

1 DECODER SOURCE

AFTER DECRYPTION

3{ DISABLED

The available options are:

• Decoder Source –Input stream is directly routed to the ASI output

• After Decryption – Stream traverses the CAM and then is directed to

the ASI output

• Disabled – ASI output signal is disabled

• 27 MHZ SYNCHRONIZATION

The 27 MHz Synchronization Configuration Option defines the

synchronization source for the IRD VCXO.

The Decoder Synchronization Source is a 27 MHz clock, generated by a

Voltage Controlled Cristal Oscillator (VCXO). It is used to synchronize the

IRD to the MPEG stream.

27MHz Synchronization

1 STREM PCR

FIXED VALUE

3{ SYNC/GEN-LOCK

The available options are:

• Stream PCR – The VCXO is synchronized to the program clock

recovered from the PCR data.

• Fixed Value – The VCXO is running in free mode.

• Sync/Gen-Lock – Synchronizes the IRD according to external video

signal

NOTE

The VCXO is factory calibrated to a fixed 27 MHz clock.