MSP3410B datasheet(21/68 Pages) MICRONAS

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PRELIMINARY DATA SHEET

MSP 3410 B

ITT Semiconductors

Table 11–7: 8 bit FIR-coefficients (decimal integer) for MSP 3410 B

FIR_REG_1 0001hex and FIR_REG_2 0005hex

NICAM

FM-

Ter-

res-

trial

B/G, I

frequency

FM - Satellite

FIR filtering corresponds to a bandpass filtering with a

band width of B = 130 kHz, 180 kHz, 200 kHz, ... 380 kHz

Auto-

or AM

Bandwidth (see also Table FM Volume Prescale)

(i)

SC/

SP/

FIR_

REG1

FIR_

REG1

Ger-

man

Dual

FIR_

REG1

and 2

130

kHz

FIR_

REG1

130

kHz

FIR_

REG2

180

kHz

FIR_

REG1

180

kHz

FIR_

REG2

200

kHz

FIR_

REG1

200

kHz

FIR_

REG2

280

kHz

FIR_

REG1

280

kHz

FIR_

REG2

380

kHz

FIR_

REG1

380

kHz

FIR_

REG2

500

kHz

FIR_

REG2

FIR_

REG2

–2

–4

–8

–1

–8

–4

–8

–6

–9

–1

–10

–6

–9

–16

–8

–4

119

101

127

107

123

126

1) The 130 kHz coefficients are based on subcarriers, which are 7 dB below an existent main carrier.

11.2.4. DCO-Increments

For a chosen TV standard a corresponding set of 24-bit

increments determining the mixing frequencies of the

quadrature mixers, has to be written into the IC. In Table

11–8 some examples of DCO increments are listed. It is

necessary to divide them up into low part and high part.

The formula for the calculation of the increments for any

chosen IF-Frequency is as follows:

INCRdez = int(f/fs ⋅ 224)

with: int = integer function

= IF-frequency in MHz

fS = sampling frequency (18.432 MHz)

Conversion of INCR into hex-format and separation of

the 12-bit low and high parts lead to the required incre-

ments. (DCO1_HI or _LO for channel 1, DCO2_HI or LO

for channel 2).

Table 11–8: DCO increments for the MSP 3410 B; frequency in MHz, increments in Hex

DCO1_LO 0093hex, DCO1_HI 009Bhex; DCO2_LO 00A3hex, DCO2_HI 00ABhex

Frq. MHz

DCO_HI

DCO_LO

Frq. MHz

DCO_HI

DCO_LO

4.5

3E8

000

5.04

5.5

5.58

5.7421875

460

4C6

4D8

4FC

000

38E

000

0AA

5.76

5.85

5.94

500

514

528

000

6.0

6.2

6.5

6.552

535

561

5A4

5B0

555

C71

71C

000

6.6

6.65

6.8

5BA

5C5

5E7

AAA

C71

1C7

7.02

618

000

7.2

640

000

7.38

668

000

7.56

690

000

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