CXD1968AR
SYR_MISC2
Read/Write
RESET: 0x85
Default R/W
Offset Address: 0x4F
Bit
Name
Description
Sets the threshold for turning on the CAS block co-channel
suppression filter if CCI has been detected.
7:5 CCIDETECTLEVEL
4:0 FORCEDOFFSET
100
R/W
Causes the enhanced symbol tracker to consistently shift the
FFT window for each symbol by FORCEDOFFSET samples
i.e. cause the FFT window to be early by FORCEDOFFSET
samples. Use with modest values in doppler channels.
00101 R/W
Note) 1. The CCS filter is turned on whenever CCI is detected, and during acquisition even if the CCS Enable
bit (bit 7 of the CAS_CTL register) is clear, so it is important that the CAS_FREQ register is set
to the correct frequency to cancel the vision carrier of any CCI present. See description of the
CAS_FREQ register.
2. Ensure that CCS is disabled prior to acquisition. Failure to do so will prevent automatic selection
of CCS.
SYR_MISC3
Read/Write
RESET: 0x6A
Default R/W
Offset Address: 0x51
Bit
7
Name
Reserved
Description
0
R/W
Sets the amount of reduction α to apply to the CIR
averaging where the averaging of the CIR from symbol to
symbol is;
6:5 CIRHOLDBACKOFF
4:3 CIRHOLDLEVEL
11
R/W
avCIR = avCIR + curCIR × 2 –α
Sets the power threshold which the CIR has to exceed to
be deemed stable during an enhanced tracking period so
that reduced CIR averaging can take place.
01
0
R/W
R/W
0: Reduces averaging of the CIR in the enhanced tracker
when the CIR profile is seen to be stable during a
tracking period – desirable for time varying channels.
2
CIRHOLD DISABLE
1: Maintain full averaging through out the tracking period.
Sets the calculation method for the duration of a tracking
period (in symbols) for the enhanced tracker.
00: Duration fixed to NUMSYMSTTRACK2K or
NUMSYMSTTRACK8K.
01: Duration alternates between N and 0.5N where N is
either NUMSYMSTTRACK2K for 2K mode and
NUMSYMSTTRACK8K for 8K mode.
1:0 HALFTIMECONTROL
10
R/W
10: Duration determined randomly from period to period.
Ideal for time varying channels.
11: Reserved
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SONY [ SONY CORPORATION ]
