Philips Components
Preliminary specification
Desktop video tuner
system CCIR B/G
FEATURES
•
System CCIR 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
•
I
2
C-bus control of tuning, address selection, AFC status
information
•
Complies with European regulations on radiation, signal
handling and immunity
(“CENELEC 55020, 55013’’
and
‘‘Amtsblatt 15/92”)
•
Small horizontally mounted metal housing.
DESCRIPTION
The FI1200MK2 family consists of the following types
FI1216MK2, FI1246MK2, FI1256MK2. They are designed
to meet a wide range of RF applications in the PC
Multi-Media environment.
The FI1216MK2 types 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
2
C-bus. All front-ends meet the
input immunity and radiation of CENELEC.
The FI1216MK2 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 FI1216MK2 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.
1997 Mar 13
2
FI1216MK2
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
2
C-bus.
ORDERING INFORMATION
TYPE
DESCRIPTION
CATALOGUE
NUMBERS
FI1216MK2/HM/PH standard phono 3139 147 13291
FI1216MK2/HM/IEC IEC
3139 147 13301
MARKING
The following items of information are printed on a sticker
that is on the top cover of the tuner:
•
Type number
•
Code number
•
Origin letter of factory
•
Change code
•
Year and week code.
INTERMEDIATE FREQUENCIES
FREQUENCY
(1)
(MHz)
PAL B/G
Picture carrier
Colour
Sound 1
Sound 2
NICAM
Note
1. The oscillator frequency is above the input signal
frequency.
CHANNEL COVERAGE
BAND
Low band
Mid band
High band
CHANNELS
48.25 to 170.00 MHz
170.00 to 450.00 MHz
450.00 to 855.25 MHz
38.90
34.47
33.40
33.16
33.05
SYSTEM
Philips Components
Preliminary specification
Desktop video tuner
system CCIR B/G
LIMITING VALUES
Limiting values under operational conditions
The tuner can be guaranteed to function properly under the following conditions.
SYMBOL
V
S
V
S(ripple)
supply voltage
peak-to-peak ripple voltage susceptibility
(at 5 V
±5%);
note 1
20 Hz to 100 kHz
>100 kHz to 500 kHz
I
S
V
SCL
V
SDA
I
SDA
V
AS
Z
IF
supply current
SCL bus input voltage
SDA bus input voltage
SDA bus current (open collector)
address select voltage; note 2
2
nd
IF sound output load impedance:
DC
AC
Z
CVBS
Composite Video Baseband Signal load
impedance:
DC
AC
t
L
V
IF
V
IF(ripple)
load time constant
IF supply voltage
peak-to-peak ripple voltage susceptibility
(at 5 V
±5%);
note 1
20 Hz to 100 kHz
>100 kHz to 500 kHz
I
IF
Z
AF
IF supply current
AF sound output load impedance:
DC
AC
Notes
25
1.0
0.6
−
−
23
−
−
−
4.75
75
75
−
5.0
22
0.5
0.5
−
−
13
14
15
PARAMETER
PIN
MIN.
4.75
TYP.
5.00
FI1216MK2
MAX.
5.25
UNIT
V
12
−
−
−
−0.3
−0.3
−1
−
−
−
−
−
−
−
−
20
10
120
+5.25
+5.25
+5
+5.25
−
−
mV
mV
mA
V
V
mA
V
kΩ
kΩ
−
−
100
5.25
Ω
Ω
ns
V
24
−
−
−
−
−
−
20
10
100
−
−
mV
mV
mA
kΩ
kΩ
1. Sinusoidal ripple voltage superimposed on the 5 V supply voltage in the frequency range of 20 Hz to 500 kHz.
Criteria for TV interference >57 dB.
2. For detailed information about the address decoding, refer to Chapter “Application information”.
1997 Mar 13
5
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