Specifications

DTT 7685x
SBU Technology – Tuners ATSC half NIM with Ch 3 / 4 modulator
20 Apr 2007
Preliminary Specification Page 13 / 29
Power mode select (CD5):
Section status
SL1 SL0 Power mode
IIC
interface &
registers
Crystal
oscillator
PLL &
VCO
Converter
& IF stages
Power (mA)
(excluding
IFamp)
0 X Sleep Enabled Enabled Disabled Disabled 9
1 0 PLL & VCO Enabled Enabled Enabled Disabled 42
1 1 Full function Enabled Enabled Enabled Enabled
Full
Default state in power up: 01
Control Data byte (CD4):
Reference Divider Ratio
R4 R3 R2 R1 R0 Ratio F
ref (kHz)
0 0 0 1 1 16 250
0 0 1 0 0 32 125
0 0 1 0 1 64 62.5
0 0 1 1 0 128 31.25
0 1 0 1 1 20 200
0 1 1 0 0 40 100
0 1 1 0 1 80 50
0 1 1 1 0 160 25
1 0 0 1 1 24 166
1 0 1 0 0 48 83.33
1 0 1 0 1 96 41.67
1 0 1 1 0 192 20.83
1 1 0 1 1 28 142.8
1 1 1 0 0 56 71.42
1 1 1 0 1 112 35.71
1 1 1 1 0 224 17.85
Default state in power up: 10011
Tuner Band Switch Byte (CD5)
Modulator path off (P1=0) Modulator path on (P1=1)
Band CD5 (Hex) CD5 (Hex)
Band VHF-L (1) 39 3B
Band VHF-H (2) 7C 7E
Band UHF (3) B5 B7
Band VHF-L (1)
with FM trap enabled
38 3A