FM1246SLASHHMSLASHI datasheet(9/24 Pages) PHILIPS

9 / 24 page

1997 May 14

Philips Components

Preliminary speciﬁcation

Desktop video & FM radio module

system CCIR I

FM1246

Deﬁnitions of test signals (see Fig.2)

Aerial input characteristics

TEST SIGNAL

FREQ.

(MHz)

AMPLITUDE

MODULATION

VIDEO

AUDIO

A0: unmodulated vision

carrier

480.25

60 dB

µV

A1: CCIR I standard signal

with video modulation

480.25

60 dB

µV

(top sync)

100% (rest carrier 10%)

2T pulse and bar

B1: unmodulated sound

carrier I system

486.25

−7 dB w.r.t. A1

B2: FM modulated sound

carrier I system

486.25

−7 dB w.r.t. A1

1 kHz; modulation frequency

deviation

±27 kHz;

µs pre-emphasis

B3: unmodulated sound

carrier I system

478.25

−15 dB w.r.t. A1

C1: FM modulated sound

carrier

87.5

60 dB

µV

1 kHz; modulation frequency

deviation

±75 kHz;

10% pilot carrier (L = R)

C2: FM modulated sound

carrier

98.0

60 dB

µV

1 kHz; modulation frequency

deviation

±75 kHz;

10% pilot carrier (L = R)

C3: FM modulated sound

carrier

108.0

60 dB

µV

1 kHz; modulation frequency

deviation

±75 kHz;

10% pilot carrier (L = R)

C4: FM modulated sound

carrier

98.0

60 dB

µV

1 kHz; modulation frequency

deviation

±22.5 kHz

C5: unmodulated sound

carrier

98.0

60 to 100 dB

µV

SYMBOL

PARAMETER

CONDITIONS

MIN.

MAX.

UNIT

VSWR

reﬂection coefﬁcient

referred to 75

Ω impedance

(worst case on or between picture

and sound carrier at maximum gain):

all channels in TV mode

−

FM (centre of channel)

−

VPSM

surge protection voltage

−

Vant

antenna connection disturbance

voltage

<1.75 GHz

−

µV

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