STV8216 datasheet(50/97 Pages) STMICROELECTRONICS

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STV82x6

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IAGCC

Channel 2 Internal AGC Time Constant for QPSK

IAGCS

Channel 2 Internal AGC Status for QPSK

CARFQ2H, CARFQ2M, CARFQ2LChannel 2 Carrier DCO Frequency

Address (hex): 26h

Type: R/W

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

IAGC_OFF

IAGC_CST[2:0]

Bit Name

Reset

Function

IAGC_OFF

AGC Disable

0: Internal AGC is active

1: Internal AGC is disabled

Bits[6:3]

0000

Reserved.

IAGC_CST[2:0]

011

Internal AGC Programmable Step Constant.

These bits control the time per step (values given for QPSK mode). The default value defines the

optimum trade-off between fast settling time (for the fastest NICAM identification) and the noise

immunity (minimum BER degradation)

Step time (us) Time Response (ms)

000

703

128

001

352

010

176

011

100

101

110

111

5.5

0.82

Address (hex): 27h

Type: R

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

IAGC_CTRL[7:0]

Bit Name

Reset

Function

IAGC_CTRL[7:0]

00000000

Indicates the value of the internal AGC gain control

Address (hex): 28H to 2Ah

Type: R/W

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

CARFQ2[23:16], CARFQ2[15.8], CARFQ2[7:0]

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