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參數(shù)資料
| 型號： | T7290A |
| 廠商： | Lineage Power |
| 英文描述： | DS1/T1/CEPT/E1 Line Interface(DS1/T1/CEPT/E1 線接口) |
| 中文描述： | DS1/T1/CEPT/E1線路接口（DS1/T1/CEPT/E1線接口） |
| 文件頁數(shù)： | 8/24頁 |
| 文件大?。?/td> | 420K |
| 代理商： | T7290A |
Data Sheet
April 1998
T7290A DS1/T1/CEPT/E1 Line Interface
8
Lucent Technologies Inc.
Receiver
(continued)
Data Patterns
Any data pattern with a minimum long-term 1s density
of 12.5% with 15 or fewer consecutive 0s is allowed.
Loss of Signal
Both digital (DLOS) and analog (ALOS) loss-of-signal
detection is used in the T7290A device. The digital sig-
nal detector is described later under the Alarms and
Maintenance section. The analog signal detector uses
the output of the receiver peak detector to determine if
a signal is present at T1 and R1. If the input amplitude
drops below approximately 0.48 Vp for DS1/T1 opera-
tion or 0.28 Vp for CEPT/E1 operation, the analog
detector output becomes active. Hysteresis (250 mV) is
provided in the analog detector to eliminate ALOS
chattering. Either the analog or the digital detector sets
IN-LOS high.
The time required to detect analog loss of signal
(ALOS) depends on the incoming signal amplitude
before it disappears. Typical ALOS detection times are
given in Table 3.
Table 3. Typical ALOS Detection Times
Signal Amplitude
(Vp)
3.6
2.5
1.7
1.0
Typical ALOS
Detection Time (ms)
5.0
3.7
2.8
1.4
Transmitter
Output Pulse Shape
Transmitter specifications are shown in Table 4. The T1 pulse shape template is specified at the network interface
as shown in Figure 4. The DS1 pulse shape template is specified at the DSX and is illustrated in Figure 5. CEPT
transmit waveforms at the device output conform to the template shown in Figure 6.
Table 4. Transmitter Specifications
*
**
Percentage of the pulse amplitude and pulse width.
Meets CH-PTT return loss specifications (CEPT only).
In accordance with the interfaces described in the Line Termination section under Applications.
Below the power at 772 kHz.
Total power difference.
Parameter
Min
Typ
Max
Unit
Output Pulse Amplitude:*
T1
DS1 (at DSX)
CEPT (into 75
)
CEPT (into 120
)
Output Pulse Width:
T1
DS1
CEPT
Output Power Levels:
T1 (3 kHz band at 772 kHz)
T1 (3 kHz band at 1544 kHz)
DS1 (2 kHz band at 772 kHz)
DS1 (2 kHz band at 1544 kHz)
Positive/Negative Pulse Imbalance:
DS1
CEPT
§
CEPT Zero Level**
Return Loss:
51 kHz—102 kHz
102 kHz—2.048 MHz
2.048 MHz—3.072 MHz
2.7
2.4
2.13
2.7
3.0
3.0
2.37
3.0
3.3
3.6
2.61
3.3
V
V
V
V
279
330
219
324
350
244
369
370
269
ns
ns
ns
12.0
–25
12.6
–29
—
—
—
16.5
–39
16.5
–39
19.0
—
17.9
—
dBm
dB
dBm
dB
0.1
2
1
0.5
±
5
10
dB
%
%
8
14
10
—
—
—
—
—
—
dB
dB
dB
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| T-7290A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:T7290A DS1/T1/CEPT Line Interface |
| T-7290A-EL | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:T7290A DS1/T1/CEPT Line Interface |
| T-7290A--EL | 制造商:Alcatel-Lucent 功能描述:DATACOM, PCM TRANSCEIVER, PDSO28 |
| T7290A-EL | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:T7290A DS1/T1/CEPT Line Interface |
| T-7290A--EL-DT | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
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