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PDF 3X8168 Data sheet ( Hoja de datos )
| Número de pieza | 3X8168 | |
| Descripción | (3X8168 / 3X8292) TARGET SPECIFICATION ELECTRICAL DATA | |
| Fabricantes | Microtune | |
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FRONTEND 4049 FM5
3x8168; 3x8292
TARGET SPECIFICATION ELECTRICAL DATA
1. Description:
The frontend 4049 FM5 is specially designed for multimedia applications. It includes TV as well as
FM reception possibility. TV reception standard are B/G; I, D/K, L, L`. The frontend includes a
hyperband tuner which covers the frequency range from 45 to 865 MHz and an IF-part with SAW-
filter, IF-amplifier, video- and sound demodulator. So the AF signal is available at the audio output
terminal, the CVBS signal is available at the video output terminal. Also a 2nd IF output is provided,
which allows external sound demodulation for stereo and NICAM reception. A video buffer is built
in which makes a direct connection to 75 Ω inputs possible. The reception frequency range is
divided in VHF low, VHF high and UHF.
VHFlow part of the tuner is used for FM reception also. Complete FM signal processing including
demodulation and stereo decoding is built in. Baseband signals L (left) and R (right) as well as
MPX (Baseband Multiplex signal) are on pins available.
Band, standard selection and tuning are done via I²C-bus, completely. Also a digital AFC-function
can be realized, because the AFC-voltage generated by the IF-demodulator is fed to an
analogue/digital converter which is integrated in the IF demodulator-IC and readable via I²C-bus.
A DC/DC converter is built in. Therefore supply voltage is 5V only.
2. Mechanical Characteristics:
2.1. Dimensions: according drawing 3x8168GZ
2.2. Weight: appr. 52 g
I²C bus signal SCL
I²C bus signal SDA
Address selection for I²C bus
FM sound output R
FM sound output L
2nd IF
Video output CVBS
Supply voltage VS1
AF sound output / FM MPX
3X8168 ED
November 02
Page: 1/14
8168ED01.DOC
1 page  
6.2 TV Sound output:
Pin 21
Load
Output level:
DC
AC
DC
6.2.1 TV FM sound
Conditions:
Ant.input level 66 dBµV; Video signal: color bar
Audio signal 1kHz, 27 kHz deviation; 50 µs preemphasis
Measurements with 50 µs deemphasis:
AF - level:
THD:
S/N:
Frequency response: 40 Hz ... 15 kHz
(6 kHz deviation)
6.2.2 TV AM sound
input level 66 dBµV, video signal: color bar
audio signal 1kHz AM 54% modulation
AF - level:
THD:
S/N:
6.3. 2nd IF output
AC level of SC1 5.5, 6.0, 6.5 MHz:
(PC/ sound carrier SC1: 7, 10, 13 dB)
(sound carrier SC2 off )
AC level of SC1 6.5 MHz:
(PC/ sound carrier: 10 dB)
(L standard, without modulation)
AC level of SC2 5.74, 6.55 MHz:
(PC/ sound carrier SC1: 10 dB)
(PC/ sound carrier SC2: 20dB)
Load impedance
min. typ.
100
10
2.3
max.
unit
kΩ
kΩ
V
400 540 680 mVrms
0.5 %
50 dB
-1 1 dB
400 500 600 mVrms
1.0 %
45 dB
400
400
125
0.5
mVpp
mVpp
mVpp
kΩ
3X8168 ED
November 02
Page: 5/14
8168ED01.DOC
5 Page 
8.2.3 Adjust register
acc. Chapter 8.2.1 adjust register is addressed by subaddress 01 [hex]
Adjust register
C7 C6 C5 C4 C3 C2 C1
AGC adjustment
10 00
Deemphasis
0 De-emphasis off
1 De-emphasis on
Value of de-emphasis
0 75 us
1 50 us
Audio gain
0
1
0 dB
-6 dB
C0
0
Recommended settings adjust register
mode
C7
C6
C5
C4
C3
C2
C1
C0
=[hex]
B/G 0 1 1 1 0 0 0 0 70
I 0 1 1 1 0 0 0 0 70
D/K 0 1 1 1 0 0 0 0 70
L 0 0 0 1 0 0 0 0 10
L` 0 0 0 1 0 0 0 0 10
FM 0 1 1 1 0 0 0 0 70
FM 0 0 0 1 0 0 0 0 10
stereo
3X8168 ED
11/14
November 02
Page:
8168ED01.DOC
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet 3X8168.PDF ] | |
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