參數(shù)資料
型號: 73K302L
廠商: TDK Corporation
英文描述: Single-Chip Modem
中文描述: 單芯片調(diào)制解調(diào)器
文件頁數(shù): 19/29頁
文件大小: 282K
代理商: 73K302L
73K302L
Bell 212A, 103, 202
Single-Chip Modem
19
DYNAMIC CHARACTERISTICS AND TIMING
(continued)
PARAMETER
Call Progress Detector
CONDITION
MIN
NOM
MAX
UNIT
Detect Level
-3 dB points in 285 and 675 Hz
-38
dBm0
Reject Level
Test signal is a 460 Hz sinusoid
-45
dBm0
Delay Time
-70 dBm0 to -30 dBm0 STEP
20
40
ms
Hold Time
-30 dBm0 to -70 dBm0 STEP
20
40
ms
Hysteresis
2
dB
Carrier Detect
Threshold
DPSK or FSK receive data
-49
-42
dBm0
Delay Time
Bell 103
8
20
ms
Bell 212A
15
32
ms
Bell 202 Forward Channel
6
12
ms
Bell 202 Back Channel
25
40
ms
Hold Time
Bell 103
6
20
ms
Bell 212A
10
24
ms
Bell 202 Forward Channel
3
8
ms
Bell 202 Back Channel
10
25
ms
Hysteresis
Special Tone Detectors
2
dB
Detect Level
See definitions for
TR bit D0 mode
-49
-42
dBm0
Delay Time
Answer tone
10
25
ms
900 Hz SCT tone
Preceded by valid carrier*
4
10
ms
202 Main Channel Mark
10
25
ms
202 Back Channel Mark
20
65
ms
1270 or 2225 Hz marks
10
25
ms
* If SCT duration >4ms, it is guaranteed to detect.
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