TDA7514 datasheet(37/74 Pages) STMICROELECTRONICS

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TDA7514

Table 28. SUBADDRESS 13: AM Fast AGC1, AM Ultra NARROW BAND AGC, Weather Band Gain

Table 29. SUBADDRESS 14: Soft Mute, Adjacent Channel Mute

(*) Cfr. byte 20 for dependancy of ISS Smeter threshold on byte 14 programming

MSB

LSB

FUNCTION

AM fast AGC1

off (R =100 Kohm)

on (R = 9 Kohm)

AM Narrow AGC disable

0NAGC on

1NAGC off

AM Ultra Narrow Band AGC Threshold

@ IF2AMPin

@ SG

000

001

010

011

100

101

110

111

Weather Band audio gain boost

boost off (std audio gain)

boost on (audio gain x 15 = +23.5 dB)

MSB

LSB

FUNCTION

Soft mute start/stop point (FM, AM) (*)

VSmeterL=0,

VSmeterH=0.6

VSmeterL=0.2,

VSmeterH=0.6

VSmeterL=0.5,

VSmeterH=1.4

VSmeterL=1.0,

VSmeterH=1.4

Adjacent channel mute start/stop point (FM)

0VAdjChL=1,

VAdjChH=4.5

1VAdjChL=2

VAdjChH=4.5

Full soft mute level

-4dB

(step = -2.5dB)

-21.5dB

Full adjacent channel mute level

0dB

-6dB

-9dB

-12dB

TDA7514 数据表(PDF) 37 Page - STMicroelectronics

TDA7514 数据表(HTML) 37 Page - STMicroelectronics

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