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Single-Conversion DVB-H Tuner
Table 11. VCO Control Register (Address: 0x09)
BIT NAME
VCO[1:0]
SB[2:0]
VAS
ADL
ADE
BIT LOCATION
(0 = LSB)
7, 6
5, 4, 3
2
1
0
FUNCTION
Controls which VCO is activated when using manual VCO programming mode:
00 = VCO disabled.
01 = Select VCO 0 (lowest frequency VCO).
10 = Select VCO 1.
11 = Select VCO 2 (highest frequency VCO).
Selects which VCO sub-band is activated when using manual VCO programming mode:
000 = Select sub-band 0 (lowest frequency sub-band).
001 = Select sub-band 1.
010 = Select sub-band 2.
011 = Select sub-band 3.
100 = Select sub-band 4.
101 = Select sub-band 5.
110 = Select sub-band 6.
111 = Select sub-band 7 (highest frequency sub-band).
Enables or disables the VCO autotuner function:
1 = VCO and VCO sub-band are programmed automatically by the autotuner.
0 = VCO and VCO sub-band selection is controlled manually by programming the
VCO[1:0] and SB[2:0] bits.
Enables or disables the VCO tuning voltage ADC latch when the VCO autotuner is
disabled (VAS = 0):
1 = Latches the ADC output.
0 = Disables the ADC latch.
Enables or disables the VCO tuning voltage ADC read when the VCO autotuner is
disabled (VAS = 0):
1 = Enables ADC read.
0 = Disables ADC read.
Table 12. Baseband Control Register (Address: 0x0A)
BIT NAME
BB_BW[3:0]
BB_BIA
PD_TH[2:0]
BIT LOCATION
(0 = LSB)
7–4
3
2, 1, 0
FUNCTION
Programs the bandwidth of the baseband filter. Optimum values for 6MHz to 8MHz wide
channels can be calculated after reading a ROM table entry. See the Reading the ROM
Table section.
Baseband filter bias current control:
1 = High-bias current.
0 = Low-bias current.
Programs the power-detector attack point for closed-loop RF gain control; see the
Typical Operating Characteristics for power-detector behavior:
000 = Most aggressive RF gain reduction.
001
…
110
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