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參數(shù)資料
| 型號： | T7507 |
| 元件分類： | Codec |
| 英文描述： | T7507 Quad PCM Codec with Filters, Termination Impedance, and Hybrid Balance |
| 中文描述： | T7507四路PCM編解碼器與過濾器，終端阻抗，以及混合平衡 |
| 文件頁數(shù)： | 22/30頁 |
| 文件大小： | 558K |
| 代理商： | T7507 |
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22
Lucent Technologies Inc.
Data Sheet
August 1999
Termination Impedance, and Hybrid Balance
T7507 Quad PCM Codec with Filters,
Chip Set Performance Specifications
(continued)
Gain Flatness—Out of Band—Low
Frequencies
Transmit direction only, loss relative to 1020 Hz. This
specification is met by using the T7507, L8567 SLIC,
L7583 solid-state switch, and 50
protection resistors
(200
+ 680
|| 0.1 μF termination).
Table 23. Gain Flatness—Out of Band—Low
Frequencies
Loss vs. Level Relative to Loss at –10 dBm
Input at 1020 Hz
This specification is met by using the T7507, L8567
SLIC, L7583 solid-state switch, and 50
protection
resistors (200
+ 680
|| 0.1 μF termination).
5-5341(F)
Figure 7. Loss vs. Level
Return Loss
The following template is achieved.
5-5325(F)
Figure 8. Return Loss
Hybrid Balance
The following template is achieved.
5-5326(F)
Figure 9. Hybrid Balance
Frequency (Hz)
16.67
40
50
60
Min Loss (dB)
30
26
30
30
+3 dBm0
–10
–40
–50
–55
1.6
0.6
0.3
0
–0.3
–0.6
–1.6
L
18
R
14
300 500
2000
3400
FREQUENCY (Hz)
20
T
16
300 500
2500
3400
FREQUENCY (Hz)
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