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參數(shù)資料
| 型號： | T7688 |
| 廠商： | Lineage Power |
| 英文描述： | 5.0 V E1/CEPT Quad Line Interface(5.0 V E1/CEPT四線接口) |
| 中文描述： | 5.0V的E1/CEPT四線接口（5.0V的E1/CEPT四線接口） |
| 文件頁數(shù)： | 15/38頁 |
| 文件大小： | 577K |
| 代理商： | T7688 |
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Data Sheet
May 1998
T7688 5.0 V E1/CEPT Quad Line Interface
15
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 illustrated in
Figure 3.
Figure 3. ITU-T G.703 Pulse Template
During CEPT operation, the transmitter tip/ring (TTIP/TRING pins) will perform as specified in Table 5.
* In accordance with the interfaces described in the Absolute Maximum Ratings section and the Handling Precautions section, the output
pulse amplitude is measured at the transformer secondary.
Using external line interface circuitry described in Figure 12 and Table 19.
Table 5. 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%
5-3145(C)r.7
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