SPEAKER ATTENUATORS

MSB

LSB

SPEAKER ATTENUATORS LF, LR, RF, RR

D7

D6

D5

D4

D3

D2

D1

D0

-1.25dB STEPS

000

0dB

0

0

1

-1.25dB

0

1

0

-2.5dB

0

1

1

-3.75dB

1

0

0

-5dB

1

0

1

-6.25dB

1

1

0

-7.5dB

1

1

1

-8.75dB

10dB STEPS

0

0

0dB

0

1

-10dB

1

0

-20dB

1

1

-30dB

11111

Speaker Mute

For example an attenuationof 25dB on a selected output is given by: 11110100

Note:

If the speaker attenuator bytes the three MSBs are used for additional Noise blanker Roll off programming

STEREO DECODER

MSB

LSB

FUNCTION

D7

D6

D5

D4

D3

D2

D1

D0

0

0

11dB Input Gain

0

1

8.5dB Input Gain

1

0

6dB Input Gain

1

1

3.5dB Input Gain

0

Stereo Decoder Muted

1

Stereo Decoder Off

1

Forced Mono

0

0

Noise Blanker Threshold 1 NBT 35mV

0

1

Noise Blanker Threshold 2 NBT 45mV

1

0

Noise Blanker Threshold 3 NBT 55mV

1

1

Noise Blanker Threshold 4 NBT 65mV

0

1

For example pilot threshold low, noise blanker threshold 3 (NTB = 10), Stereo decoder ON, 6dB input

gain is given by: 11000010.

TDA7340G

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