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
nd
terminal, the CVBS signal is available at the video output terminal. Also a 2 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 V
S1
AF sound output / FM MPX
3X8168 ED
November 02
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8168ED01.DOC
6. TV Output parameter:
6.1. Video output:
Conditions:
Standard B/G
;
Ant. input level 66 dBµV
min.
typ.
1
0.9
75
max.
unit
V
pp
V
pp
Ω
CVBS - Output level (B/G, D/K, L/L`):
(Standard I):
Load impedance
Video S/N (unweighted):
Flat Field
VHF
UHF
Video sensitivity (Off Air Channels)
Video S/N = 30 dB
46
47
45
dB
dB
dBµV
Frequency response:
(sin x)/x Ref.: 0.2 MHz
1 MHz
2 MHz
3 MHz
4 MHz
4.43 MHz
5 MHz
sound carrier rejection
B/G
I, D/K, L/L´
Differential gain
modulated 5 step staircase
-1.5
-2
-4
-4
-5
-12
30
26
3
5
2
3
3
4
3
dB
dB
dB
dB
dB
dB
dB
dB
%
pp
°
pp
Differential phase
modulated 5 step staircase
3X8168 ED
November 02
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8168ED01.DOC
6.2 TV Sound output:
Pin 21
Load
Output level:
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:
min.
DC
AC
DC
100
10
typ.
max.
unit
kΩ
kΩ
V
2.3
AF - level:
THD:
S/N:
Frequency response: 40 Hz ... 15 kHz
(6 kHz deviation)
400
-1
540
50
680
0.5
1
mV
rms
%
dB
dB
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:
400
500
45
600
1.0
mV
rms
%
dB
6.3. 2nd IF output
(PC/ sound carrier SC
1
: 7, 10, 13 dB)
(sound carrier SC
2
off )
AC level of SC
1
5.5, 6.0, 6.5 MHz:
400
mV
pp
AC level of SC
1
6.5 MHz:
400
(PC/ sound carrier: 10 dB)
(L standard, without modulation)
mV
pp
(PC/ sound carrier SC
1
: 10 dB)
(PC/ sound carrier SC
2
: 20dB)
AC level of SC
2
5.74, 6.55 MHz:
125
mV
pp
Load impedance
0.5
kΩ
3X8168 ED
November 02
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8168ED01.DOC
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