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參數(shù)資料
| 型號(hào)： | T7296 |
| 廠商： | Lineage Power |
| 英文描述： | Integrated Line Transmitter(集成PCM線傳送器) |
| 中文描述： | 綜合線變送器（集成的PCM線傳送器） |
| 文件頁(yè)數(shù)： | 6/16頁(yè) |
| 文件大?。?/td> | 396K |
| 代理商： | T7296 |
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T7296 DS3/STS-1/E3
Integrated Line Transmitter
Data Sheet
February 2000
6
Lucent Technologies Inc.
DS3 Signal Requirements at the DSX
For DS3 operation, pulse characteristics are specified at the DSX-3, which is an interconnection and test point
referred to as the cross connect. The cross connect exists at the point where the transmitted signal reaches the dis-
tribution frame jack. The T7296 can transmit through 450 ft. of 728A cable to the DSX-3 in DS3 mode. Table 2 lists
the signal requirements.
Currently, two isolated pulse template requirements exist: the ANSI TI.404 pulse template (see Table 3 and
Figure 4) and the Bellcore TR-NWT-000499 pulse template (see Table 4 and Figure 5). The pulse transmitted by
the T7296 meets these templates.
Table 2. DSX-3 Interconnection Specification
*
The pulse template in G.703 is shown in Figure 5 and specified in Table 4. The proposed G.703 further states that the voltage in a time slot
containing a zero must not exceed ±5% of the peak pulse amplitude, except for the residue of preceding pulses.
The power levels specified by the proposed G.703 are identical except that the power is to be measured in 3 kHz bands.
The all-1s pattern must be a pure all-1s signal, without framing or other control bits.
Table 3. DSX-3 Pulse Template Boundaries for ANSI TI.404
(See Figure 4.)
5-1242(C)r.4
Figure 4. DSX-3 Isolated Pulse Template for ANSI T1.404
Parameter
Line Rate
Line Code
Test Load
Pulse Shape
Specification
44.736 Mbits/s ± 20 ppm.
Bipolar with three-0 substitution (B3ZS).
75
± 5%.
An isolated pulse must fit the template in Figure 4 or Figure 5.* The pulse amplitude may be
scaled by a constant factor to fit the template. The pulse amplitude must be between 0.36 V pk
and 0.85 V pk, measured at the center of the pulse.
For an all-1s transmitted pattern, the power at 22.368 MHz ± 0.002 MHz must be –1.8 dBm to
+5.7 dBm, and the power at 44.736 MHz ± 0.002 MHz must be –21.8 dBm to –14.3 dBm.
Power Levels
Lower Curve
Upper Curve
Time
Equation
Time
Equation
T
≤
–0.36
–0.03
T
≤
–0.68
+0.03
–0.36
≤
T
≤
+0.36
– 0.03
–0.68
≤
T
≤
+0.36
+ 0.03
+0.36
≤
T
–0.03
+0.36
≤
T
0.05 + 0.407e
–1.84[T – 0.36]
0.5 1
π
2
sin
+
1
0.18
+
0.5 1
π
2
sin
+
1
0.34
+
0.8
1.2
0.6
0.2
0.0
–0.2
–1.0
–0.5
0
0.5
1.0
1.5
N
TIME SLOTS—NORMALIZED TO PEAK LOCATION
0.4
1.0
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