Desktop video tuner
multi system CCIR L/L’ and B/G
Preliminary specification
File under BU Tuners, DC03
1996 Jul 09
Philips ComponentsPreliminary specification
Desktop video tuner
multi system CCIR L/L’ and B/G
FEATURES
• Systems CCIR L/L’ and B/G
• True 5 V device (low power dissipation)
• Full frequency range from channel 2 (48.25 MHz) to
channel 69 (855.25 MHz)
• PLL controlled tuning
• True-synchronous vision IF demodulator (PLL)
• Demodulated video output, AF sound output, second
sound IF output
• I2C-bus control of tuning, address selection, AFC status
information
• Complies with European regulations on radiation, signal
handling and immunity
• Small horizontally mounted metal housing.
DESCRIPTION
The FI1200MK2 family of front ends are designed to meet
a wide range of RF applications in the PC Multi-Media
environment.
The FI1216MF MK2 type are available with a single 75 Ω
input for TV reception. The input connector is available in
either standard phono (female socket) or IEC (female
socket).
The tuning and bandswitching are performed through the
built-in digitally controlled I
input immunity and radiation requirements of CENELEC.
(“CENELEC 55020, 55013”)
2
C-bus. All front ends meet the
FI1216MF MK2
The FI1216MF MK2 consists of a tuner section and an IF
section, which are all designed on a single PCB. The
front-end is assembled in a metal housing made of a
rectangular tin plated steel frame with front and rear covers
which have soldered contacts to the frame. A single phono
or IEC aerial socket is mounted on one side of the frame.
All other connections are made via pins at the bottom.
The tuner section is equipped with 3 tuned RF MOSFET
input stages, with a 3-band mixer-oscillator IC, containing
the oscillators, mixers and IF amplifier. Tuning and band
switching in the tuner section are done with a digital
programmable PLL tuning system. This enables tuning
with step-size programmable between 31.25, 50.0 or
62.5 kHz. A DC-DC converter is built around the PLL
synthesizer IC to provide the tuning voltage, thus making
the FI1216MF MK2 front-end a true 5 V device.
The IF section uses a true-synchronous vision IF
demodulator (PLL) with an intercarrier SAW filter in front of
it. The analog AFC voltage is fed to the 5-level A/D
converter in the PLL tuning IC, so that the AFC status can
be read via the I
ambient temperature25 ±5°C
RHrelative humidity60 ±15%
V
Z
Z
t
pr
Z
S
CVBS
IF
S(AE)
supply voltage (tuner and IF section)5 ±0.125V
video output load impedance (DC)>75Ω
IF sound output load impedance (DC)>500Ω
pre-heating time (+5 V at pin 24)10minute
aerial source impedance (unbalanced)75Ω
1996 Jul 096
Philips ComponentsPreliminary specification
Desktop video tuner
FI1216MF MK2
multi system CCIR L/L’ and B/G
TUNER SECTION
Tuner characteristics
For detailed information about the PLL programming, refer to Chapter “Application information”.
The desktop video tuner is guaranteed to function properly within the specified operational conditions, but a certain
deterioration of performance parameters may occur at the limits of the operational conditions.
Test equipment
EQUIPMENTPARAMETERVALUEUNIT
DC voltmeterinput impedance>1MΩ
Oscilloscopeinput impedance:
resistance>1MΩ
capacitance<15pF
Spectrum analyzerinput impedance50Ω
FET probeinput impedance:
resistance1MΩ
capacitance3.5pF
output impedance50Ω
voltage gain0dB
1996 Jul 097
Philips ComponentsPreliminary specification
Desktop video tuner
multi system CCIR L/L’ and B/G
handbook, full pagewidth
IF
output
aerial
connector
IF
PROBE
OUT
11
12 13 14 15
FI1216MF MK2
TP2 TP3
22 23 24 25
V
V
BU2
SCL
SDA
(1) BU4 loaded with 75 Ω.
(2) 50 µs de-emphasis.
SA =spectrum analyzer.
P = FET probe.
DA = distortion analyzer.
T
S
TEST JIG
P
10 nF
nF
kΩ
1
3
33
µF
BU6BU2BU4BU5
video
out
(1)
+5 V
51
nF
1
kΩ
(2)
DASA
CCA010
Fig.2 Typical test set-up.
1996 Jul 098
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