MSM7582 datasheet(18/24 Pages) OKI

tên linh kiện	MSM7582

Giải thích chi tiết về linh kiện	pie/4 Shift QPSK MODEM

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¡ Semiconductor

MSM7582/7582B

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(2) CR1 (I, Q gain adjustment)

Ich

GAIN3

Ich

GAIN2

Ich

GAIN1

Ich

GAIN0

Qch

GAIN3

Qch

GAIN2

Qch

GAIN1

Qch

GAIN0

00000000

Initial value

CR1

B7 to B4: I+/I– output gain setting, in 3 mV steps (Refer to Table-3.)

B3 to B0: Q+/Q– output gain setting, in 3 mV steps (Refer to Table-3.)

(3) CR2 (ENV gain adjustment)

ENV

GAIN3

ENV

GAIN2

ENV

GAIN1

ENV

GAIN0

————

00000000

Initial value

CR2

B7 to B4: ENV output gain adjustment (Refer to Table-3.)

B3 to B0: Not used

Table-3 I, Q, and ENV Output Gain Values

CR1-B7

-B6 -B5 -B4

CR1-B3

-B2 -B1 -B0

CR2-B7

-B6 -B5 -B4

111

110

101

100

011

010

001

000

111

110

101

100

011

010

001

000

Amplitude

1.042

1.036

1.030

1.024

1.018

1.012

1.006

1.000

0.994

0.988

0.982

0.976

0.970

0.964

0.958

0.952

¥ Reference value

(Reference value)

Description

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