參數(shù)資料
型號: ST75C540FP-A
廠商: 意法半導(dǎo)體
英文描述: SUPER INTEGRATED DEVICESWITH DSP, AFE & MEMORIES FORTELEPHONY,MODEM, FAXOVERINTERNET& POTSLINES
中文描述: 超級綜合DEVICESWITH數(shù)字信號處理器,模擬前端
文件頁數(shù): 77/84頁
文件大?。?/td> 599K
代理商: ST75C540FP-A
XV - DEFAULT CALL PROGRESS TONE DETECTORS
Figure 44 :
Call Progress Tone Detector Band 1
0
-10
-20
-30
-40
-50
0
200
400
600
800
1000
dB
no detection
detection
step = 10Hz
referencelevel = 0dB
f (Hz)
7
0
-10
-20
-30
-40
-50
2000
2040
2080
2120
2160
2200
f (Hz)
no detection
detection
dB
referencelevel = 0dB
step = 10Hz
7
Figure 46 :
2100HzAnswer ToneDetector
0
-10
-20
-30
-40
-50
200
320
440
560
680
800
f (Hz)
no detection
detection
dB
step = 10Hz
referencelevel = 0dB
7
Figure 47 :
440HzTone Detector
0
-8
-16
-24
-32
-40
0
720
1440
2160
2880
3600
f (Hz)
no detection
detection
dB
step = 100Hz
reference level = 0dB
7
Figure 45 :
CallProgress Tone Detector Band2
XVI - DEFAULT ANSWER TONE DETECTORS
ST75C530- ST75C540
77/84
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