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參數(shù)資料
| 型號： | D6571E |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Chip for an All-Digital Telephone Answering Machine with Flash Memory Interface |
| 中文描述： | 芯片的全數(shù)字電話應(yīng)答機與快閃記憶體介面 |
| 文件頁數(shù)： | 76/117頁 |
| 文件大?。?/td> | 551K |
| 代理商： | D6571E |
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D6571E Data Sheet
DS6571E.2
DSP GROUP, INC., 3120 SCOTT BOULEVARD
SANTA CLARA, CA 95054 PH: 408 986-4300 FAX: 408 986-4490
74
14. SPEAKER PHONE
Command (C1):
1110
(15 - 12) (11 - 10) (9 - 8) (7 - 5)
LINE SENSITIVITY: = 000:
MIC. SENSITIVITY: = 000:
The line and microphone sensitivity determine the Signal-to-Noise Ratio (SNR) at which the voice detectors for the
transmit and receive directions will be activated.
PRIORITY
= 0:
No priority
= 1:
Near end priority
The priority control is used to determine the behavior of the system when both directions are silent. In the no priority
mode, the loop attenuation is distributed equally between the receive and transmit directions when both sides are silent. If
the priority bit is set, the line side is given all the attenuation and the microphone (near end) has priority.
R/T
RATIO
T/R
RATIO
LINE
SENSITIVITY
(4 - 2)
MIC
SENSITIVITY
(1)
PRIORITY
0
(0)
2 dB
= 001:
= 010:
= 011:
= 100:
= 101:
= 110:
= 111:
4 dB
6 dB
8 dB
10 dB
12 dB
14 dB
16 dB
2 dB
= 001:
= 010:
= 011:
= 100:
= 101:
= 110:
= 111:
4 dB
6 dB
8 dB
10 dB
12 dB
14 dB
16 dB
T/R RATIO - transmit/receive ratio
= 00:
= 01:
= 10:
= 11:
1.2
1.5
2.0
2.5
R/T RATIO - receive/transmit ratio
If the T/R ratio is greater than the set value, then the microphone side is speaking. Conversely, if the R/T ratio is greater
than the set value, then the line side is speaking.
Status (S1):
1110
RATIO
RATIO
SENSITIVITY
(15 - 12) (11 - 10) (9 - 8) (7 - 5) (4 - 2)
= 00:
= 01:
= 10:
= 11:
1.2
1.5
2.0
2.5
R/T
T/R
LINE
MIC
SENSITIVITY
(1)
PRIORITY
0
(0)
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