CXD1968AR
PPM_CTL_1
Read/Write
RESET: 0x10
See table below for settings.
Default R/W
Offset Address: 0x19
Bit
7
Name
Reserved
Description
0
001
0
R/W
R/W
R/W
6:4 PPMMaxFreq
Maximum search range setting for coarse frequency offset.
3
Reserved
If set, equalizes the frequency range in Hz searched in 2K and
8K modes.
Reduced Search
Time Enable
If clear, the search range in Hz is 4 times larger in 2K mode
than in 8K mode, which can unnecessarily increase acquisition
time in 2K mode. This setting is backward compatible with the
CXD1973Q.
2
0
R/W
Set to disable scattered pilot correlation. If disabled, acquisition
is slowed down because the demodulator must wait for all TPS
configuration before it can complete the acquisition sequence.
The recommended setting for this bit is “0”.
PPM Disable
FindScat Pilots
1
0
0
0
R/W
R/W
PPM Bypass Corr
Set to bypass continuous pilot correlator.
Note) The CXD1968AR can acquire a wider range of frequency offsets than the CXD1973Q.
The table below shows the ranges that may be programed using PPMMaxFreq.
Reduce
search
time
2K search range
8K search range
PPM
Max
Freq
Channel [±kHz]
Channel [±kHz]
Remarks
±
bins
FFT
±FFT
bins
8MHz 7MHz 6MHz
8MHz 7MHz 6MHz
enable
Compatible with
the CXD1973Q
0
0
0
0
000
001
010
011
31
138.4
281.3
567.0
1138.4
121.1
246.1
496.1
996.1
103.8
210.9
425.2
853.8
31
34.6
70.3
30.3
61.5
25.9
52.7
Compatible with
the CXD1973Q
63
63
Compatible with
the CXD1973Q
127
255
127 141.7 124.0 106.3
255 284.6 249.0 213.4
Compatible with
the CXD1973Q
0
0
0
0
1
1
1
1
1
1
1
100
101
110
111
000
001
010
011
100
101
110
383
511
639
767
31
1709.8 1496.1 1282.4
2281.3 1996.1 1710.9
2852.7 2496.1 2139.5
3424.1 2996.1 2568.1
383 427.5 374.0 320.6
511 570.3 499.0 427.7
639 713.2 624.0 534.9
767 856.0 749.0 642.0
138.4
138.4
138.4
281.3
281.3
567.0
567.0
121.1
121.1
121.1
246.1
246.1
496.1
496.1
103.8
103.8
103.8
210.9
210.9
425.2
425.2
31
63
34.6
70.3
30.3
61.5
25.9
52.7
31
31
127 141.7 124.0 106.3
255 284.6 249.0 213.4
383 427.5 374.0 320.6
511 570.3 499.0 427.7
639 713.2 624.0 534.9
63
166kHztransmit
offset networks
63
127
127
333kHztransmit
offset networks
500kHztransmit
offset networks
1
111
255 1138.4 996.1
853.8
767 856.0 749.0 642.0
- 57 -
SONY [ SONY CORPORATION ]
