Figure 1.2 Tu1216 General Block Diagram - Philips CU1216 Series Manual

Figure 1.2 : TU1216 general block diagram
1.
2.
3.
4.
5.
6.
R F-i np ut
7.
8.
9.
.
10.
11.
R F/m od.
12.
output
13.
14.
15.
16.
+5Vspli tter
OP TION: O PTION :
supplyvol ta ge
A ntenna pow er 17. M odul a tor i nput
(opti onal )
(2) (1) (4 )
18.
19.
20.
The module consists of the following key features :
1. Loopthrough / RF Modulator input function –Active loopthrough/RF Mod input (LM)
2. Tuner – high performance single conversion tuner that covers a frequency range from 51Mhz to 858Mhz.
33V tuning supply is derived from the single 5V supply by means of a DC/DC converter.
3. IF – Provides wideband IF output 36.15Mhz for analog reception. The narrowband IF output after SAW
filtering is being amplified further by a variable IF amplifier. This is controlled by the digital demodulator in
order to maintain a 2Vp-p differential amplified IF output to the DVB-T Receiver.
4. Digital Demodulator -- TDA10046 is used which can support up to 2K and 8K COFDM Modes. The
output can be either a parallel or a serial MPEG-2 transport stream.
l o w -band
m i d -band
n
o
hi g h- b and
i
p t
o
h
g
u
o
h r
p t
o
o
L
V
t u ne
.
33V
A GC
5V
l o op
+ 5 V tuner
AGC
suppl y voltage
(5) (6 )
.
low
AG C
osc.
l o op
m i d
o sc.
h i g h
osc.
L
L
P
O
M
4M Hz
crystal referenc e
PLL
2
I C- BUS
IF- output
+1.8V +3.3V
(broadband)
supply supply
(11 ) (12) (13 )
5
- -
BU RF Solutions
SA W
2 k/8 k C O F D M
ch an n e ld e co der
2
I C- B US
2
MPEG_ TS
MPEG_T S_CLK I C- BUS
Reset
(D 0...D7/se rial)
(26)
(23)
(15... 22) (24/25)
M PEG _PKT_SYN
.
M PEG_D AT A_VAL
(27) (28)