Preliminary specification
File under BU Tuners, DC03
1996 Jul 26
Page 2
Philips ComponentsPreliminary specification
Desktop video tuner
system CCIR I
FEATURES
• System CCIR I
• True 5 V device (low power dissipation)
• Full frequency range from channel A (45.75 MHz) to
channel E69 (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 FI1200 MK2 family of front ends are designed to meet
a wide range of RF applications in the PC Multi-Media
environment.
The FI1246 MK2 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
input immunity and radiation of CENELEC.
The FI1246 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 FI1246 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
“CENELEC 55020, 55013”
2
C-bus. All front ends meet the
.
FI1246 MK2
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 266
Page 7
Philips ComponentsPreliminary specification
Desktop video tuner
FI1246 MK2
system CCIR I
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 267
Page 8
Philips ComponentsPreliminary specification
Desktop video tuner
system CCIR I
handbook, full pagewidth
IF
output
aerial
connector
IF
PROBE
OUT
11
12 13 14 15
FI1246 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 268
Page 9
Philips ComponentsPreliminary specification
Desktop video tuner
FI1246 MK2
system CCIR I
Definitions of test signals (see Fig.2)
TEST SIGNAL
A0: unmodulated vision
carrier
A1: CCIR I standard signal
with video modulation
B1: unmodulated sound
carrier I system
B2: FM modulated sound
carrier I system
B3: unmodulated sound
carrier I system
Aerial input characteristics
SYMBOLPARAMETERCONDITIONSMIN.MAX.UNIT
VSWRreflection coefficientreferred to 75 Ωimpedance (worst case on or between
V
V
PSM
ant
surge protection voltage5−kV
antenna connection
disturbance voltage
FREQ.
(MHz)
480.2560 dBµV
480.2560 dBµV
486.25−7 dB w.r.t. A1
486.25−7 dB w.r.t. A11 kHz; modulation frequency
478.25−15 dB w.r.t. A1
AMPLITUDE
100% (rest carrier 10%)
(top sync)
picture and sound carrier at maximum gain)
<1.75 GHz−46dBµV
2T pulse and bar
VIDEOAUDIO
MODULATION
deviation ±27 kHz;
50 µs pre-emphasis
−5
1996 Jul 269
Page 10
Philips ComponentsPreliminary specification
Desktop video tuner
FI1246 MK2
system CCIR I
General characteristics
SYMBOLPARAMETERCONDITIONSMIN.TYP.MAX.UNIT
f
∆f
α
α
Z
α
m
V
t
α
V
b
b
i
IF
IF
S
x
osc
li
vs
ESD
frequency range:
low band45.75−168.25MHz
mid band175.25−447.25MHz
high band455.25−855.25MHz
margin:
for low band0.5−− MHz
for mid/high band3−− MHz
image rejection (nominal gain to 10 dB
gain reduction):
low band70−− dB
mid band<300 MHz66−− dB
mid band>300 MHz60−− dB
high band50−− dB
IF rejection (picture)60−− dB
1
⁄2 IF susceptibility:
A to B1475−− dBµV
E21 to E6960−− dBµV
sound-chrominance moiré rejection:
off-airup to 40 dB gain control56−− dB
UHFup to 30dB minimum
56−− dB
gain control
cross modulation:
in-channel70−− dBµV
in-band
low band (n ±2)78−− dBµV
mid band (n ±3)78−− dBµV
high band (n ±5)84−− dBµV
out of band−100−dBµV
breakthrough susceptibility:
A to B14; E21 to E6960−− dBµV
oscillator voltage at all pins−−70dBµV
oscillators lock-in timecharge pump set logic
−−150ms
HIGH
the video signal-to-sound interference
40−− dB
ratio with the tuner exposed to sound
signals in the audio frequency range
100 Hz to 10 kHz and sound pressure
levels up to 105 dB (20 µPa)
electrostatic discharge (ESD)
note 12−− kV
on all pins
Note
1. All the pins of the desktop video tuner are protected against electrostatic discharge (ESD) up to 2 kV . The product is
classified in category B
(‘‘MIL-STD-883C”)
.
1996 Jul 2610
Page 11
Philips ComponentsPreliminary specification
Desktop video tuner
FI1246 MK2
system CCIR I
Video and audio characteristics (see Fig.2)
PARAMETERTEST SIGNAL
CVBS characteristics:
video amplitude signal at pin 23A1 (peak-to-peak value)BU40.7−1.1V
DC level sync pulse at pin 23A1BU4−0.35−V
Video amplitude drop with respect to modulation
0.1 MHz at T
amb
=45°C:
at 1 MHzA1BU4−1.0−+1.0dB
at 2 MHzA1BU4−1.5−+1.5dB
at 3 MHzA1BU4−2.5−+1.5dB
at 4 MHzA1BU4−4.0−+2.0dB
at 4.43 MHzA1BU4−6.0−+2.0dB
Sound carrier rejectionA1(1 MHz) +B1BU440−− dB
Residual 40.4 MHz signal in video channel:
A1 + B3BU4−−68dBµV
level of 1.5 MHz
Residual 77.8 MHz signal in video channelA1BU4−−80dBµV
Second IF sound output level at level of 5.5 MHzA1 + B1BU584−− dBµV
Test on 2T pulse at T
RMS detector, de-emphasis off
AM suppression ratioA1 + B2BU640−− dB
TEST
POINT
MIN. TYP. MAX.UNIT
BU641−− dB
Digital AFC status
PARAMETERCONDITIONS
ADC word at I
2
C-bus during read operationinput voltage at pin 10: 0.0 to 0.15V
input voltage at pin 10: 0.15 to 0.30V
input voltage at pin 10: 0.30 to 0.45V
input voltage at pin 10: 0.45 to 0.60V
input voltage at pin 10: 0.60 to 1.00V
1996 Jul 2611
FREQUENCY
(kHz)
−12500
S
−62.501
S
002
S
+62.503
S
+12504
S
DIGITAL
READ-OUT
Page 12
Philips ComponentsPreliminary specification
Desktop video tuner
FI1246 MK2
system CCIR I
APPLICATION INFORMATION
A detailed description of the I2C-bus specification, with applications, is given in brochure
use it’’.
This brochure may be ordered using the code number 9398 393 40011.
WRITE mode
BITS
BYTE
7
MSB
654321
Address byte11000MA1MA00A
Program divider byte 10n14n13n12n11n10n9n8A
Program divider byte 2n7n6n5n4n3n2n1n0A
Control information byte 11CPT2T1T0RSARSBOSA
Control information byte 2P7P6P5P4P3P2P1P0A
Note
1. A = Acknowledge.
A
DDRESS SELECTION
VS= +5 V (PLL supply voltage)
‘‘The I2C-bus and how to
0
LSB
(1)
A
MA1MA0ADDRESSVOLTAGE AT PIN 15 (see note 1)
00C00 to 0.1V
01C20.2 to 0.3V
10C40.4 to 0.6V
11C60.9VSto V
S
S
S
S
Note
1. If the AS pin is left floating, the internal bias will automatically set the address to C2.
P
ROGRAMMABLE DIVIDER SETTINGS (BYTES 1 AND 2)
Divider ratio:
N=16×{f
f
=N⁄16(MHz).
osc
RF(pc)
+ f
}, where (pc) is picture carrier and fRF and fIF are expressed in MHz
Remark: for channel selection involving band switching, and to ensure smooth tuning to the desired channel without
causing unnecessary charge pump action, it is recommended to consider the difference between wanted channel
frequency (fw) and the current channel frequency (fc):
Objective specificationThis data sheet contains target or goal specifications for product development.
Preliminary specificationThis data sheet contains preliminary data; supplementary data may be published later.
Product specificationThis data sheet contains final product specifications.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
2
PURCHASE OF PHILIPS I
C COMPONENTS
2
Purchase of Philips I
components in the I2C system provided the system conforms to the I2C specification defined by
Philips. This specification can be ordered using the code 9398 393 40011.
C components conveys a license under the Philips’ I2C patent to use the
1996 Jul 2618
Page 19
Philips ComponentsPreliminary specification
Desktop video tuner
system CCIR I
FI1246 MK2
NOTES
1996 Jul 2619
Page 20
Philips Components – a worldwide company
Argentina: IEROD, Av. Juramento, 1991-14.B, (1428) BUENOS AIRES,
For all other countries apply to: Philips Components,
Marketing Communications, P.O. Box 218, 5600 MD EINDHOVEN,
The Netherlands, Fax. +31-40-2724 547.
All rights are reserved. Reproduction in whole or in part is prohibited without the
prior written consent of the copyright owner.
The information presented in this document does not form part of any quotation or
contract, is believed to be accurate and reliable and may be changed without notice.
No liability will be accepted by the publisher for any consequence of its use.
Publication thereof does not convey nor imply any license under patent- or other
industrial or intellectual property rights.
Printed in The Netherlands
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