ViewSonic Corporation
Confidential - Do Not Copy
N2201
w
-
1
M
1
6
Tuner Features:
Receiving System : Designed to cover the air channels including
digital terrestrial channels for ATSC system.
Receiving Channel
: 54MHz ~ 863MHz (center freq.)
Intermediate Frequency
: Digital(center)
: 44 MHz
Analog(P-carrier) : 45.75MHz
Input Impedance
: 75
Ω
, Unbalanced.
IF Output Impedance
: 10
Ω
, Balanced.
Band Change-Over System
: PLL system.
Tuning System : PLL system.
Narrow band output to be filtering by a 5.6MHz SAW filter.
Built in the additional IF amplifier with AGC circuit.
Reference Frequency the X-tal the RF block's PLL : 4MHz
Built in DC/DC Converter
PIN
CONNECTION
1
RF AGC
2
N.C
3
N.C(VT T.P)
4
IF+
5
IF-
6
IF AGC
7
TP(TUNER IF OUT)
8
SCL
9
SDA
10 GND
11 B+ (5V)
12 N.C
13 AFT
14 SIF OUT
15 VIDEO OUT
SDA SCL
4MHz
B+(5V)
VHF-High
VHF-Low
VT
RF-AGC.
IF-AGC
IF OUT
AGC
DETECTOR
IF
analog
demod
VO
AFT
SIF
45.75MHz
RF-INPUT
DC/DC
Converter
PLL
SAW-FILTER
SAW-FILTER
44MHz
[ IF AMP-IC ]
[ MOPLL-IC ]
IF 1
IF 2
Block diagram:
