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參數(shù)資料
| 型號： | T7690 |
| 廠商： | Lineage Power |
| 英文描述： | 5.0 V T1/E1 Quad Line Interface(5.0 V T1/E1 四線接口) |
| 中文描述： | 5.0V的四線接口的T1/E1（5.0V的T1/E1的四線接口） |
| 文件頁數(shù)： | 19/42頁 |
| 文件大?。?/td> | 726K |
| 代理商： | T7690 |
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Data Sheet
May 1998
T7690 5.0 V T1/E1 Quad Line Interface
T7693 3.3 V T1/E1 Quad Line Interface
17
Lucent Technologies Inc.
Transmitter
(continued)
CEPT Transmitter Pulse Template and Specifications
CEPT pulse shape template is specified at the system output (defined by ITU-T G.703) and is shown in Figure 4.
5-3145(C)r.8
Figure 4. ITU-T G.703 Pulse Template
During CEPT operation, the transmitter tip/ring (TTIP/TRING pins) will perform as specified in Table 9.
* In accordance with the interfaces described in the the Absolute Maximum Ratings section and the the Handling Precautions section, mea-
sured at the transformer secondary.
Using Lucent transformers:
2745CA for T7690 (CEPT 75
option 2 and CEPT 120
applications) and components with values in Figure 13 and Table 23.
2664AJ for T7693 (CEPT 75
option 2 and CEPT 120
applications) and components with values in Figure 14 and Table 24.
2745AJ2 for T7690 (CEPT 75
option 1) and components with values in Figure 13 and Table 23.
2664AK for T7693 (CEPT 75
option 1) and components with values in Figure 14 and Table 24.
Table 9. CEPT Transmitter Specifications
Parameter
Min
Typ
Max
Unit
Specification
ITU-T G.703
Output Pulse Amplitude*:
75
120
Output Pulse Width
Positive/Negative Pulse Imbalance:
Pulse Amplitude
Pulse Width
Zero Level (percentage of pulse amplitude)
Return Loss
:
51 kHz to 102 kHz
102 kHz to 2.048 MHz
2.048 MHz to 3.072 MHz
2.13
2.7
232
2.37
3.0
244
2.61
3.3
256
V
V
ns
–4
–4
–5
±
1.5
±
1.0
0
4
4
5
%
%
%
9
15
11
—
—
—
—
—
—
dB
dB
dB
CH-PTT
10%
488 ns
(244 + 244)
219 ns
(244 – 25)
10%
0%
NOMINAL PULSE
269 ns
(244 + 25)
20%
10%
10%
V = 100%
20%
50%
10%
10%
244 ns
194 ns
(244 – 50)
20%
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