CXD1968AR
5. Improved ACI rejection
The Channel Selection Filter (CSF) provides additional rejection of adjacent channel interference,
particularly in ZIF mode where there is reduced folding of ACI signals in-band during the ADC sampling
process. This can reduce the complexity of the Zero IF tuner baseband filters.
6. Improved performance with echoes outside guard interval
The CXD1968AR includes improvements to allow pre-cursive or post-cursive echoes outside the guard
interval, to meet the latest DTT specifications. This type of channel can occur in SFN networks.
7. Improved time varying channel performance
Performance has been improved in doppler channels to meet the latest DTT specifications. The symbol
synchronization algorithm has also been improved to handle “birth-death” echo fading that is more likely in
portable reception applications.
8. Improved reading of reserved TPS data
There are now separate “odd” and “even” banks of registers that latch the reserved TPS data including
Cell-ID occurring on odd and even TPS frames. The length of the valid TPS data can also be read to
determine whether Cell-ID and DVB-H signaling is present.
9. Standby power saving mode
The standby power has been reduced further. The design can enter and exit standby mode by I
2
C control.
The crystal or clock input is kept running in this mode.
10. Shutdown power saving mode
This is a very low power mode, where the crystal oscillator or clock input is stopped by the host processor
setting the OSCEN input signal to logic 0. This prevents any clock/oscillator interference affecting analog
TV reception.
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SONY [ SONY CORPORATION ]
