IDT82P2288 Integrated Device Technology, Inc., IDT82P2288 Datasheet - Page 92
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IDT82P2288
Manufacturer Part Number
IDT82P2288
Description
8 Channel T1/J1/E1 Transceiver
Manufacturer
Integrated Device Technology, Inc.
Datasheet
1.IDT82P2288.pdf
(384 pages)
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IDT82P2288
3.24
three ways of manipulating the waveform shaper can be selected before
the data is transmitted:
3.24.1
tions.
3.24.1.1
which meets T1.102 and G.703, and it is measured in the far end as
shown in Figure 32.
plates are provided corresponding to five grades of cable length. The
selection is made by the PULS[3:0] bits. In J1 applications, the
PULS[3:0] bits should be set to ‘0010’. The details are listed in Table 60.
Note: R
Figure 32. T1/J1 Pulse Template Measurement Circuit
IDT82P2288
-0.2
-0.4
-0.6
1.2
0.8
0.6
0.4
0.2
According to the various cables, configured by the PULS[3:0] bits,
1. Preset Waveform Template;
2. Line Build Out (LBO) Filter (T1 only);
3. User-Programmable Arbitrary Waveform.
The preset waveform template is provided for short haul applica-
In T1/J1 applications, the waveform template is shown in Figure 31,
In T1 applications, to meet the template, five preset waveform tem-
1
0
0
LOAD
WAVEFORM SHAPER / LINE BUILD OUT
Figure 31. DSX-1 Waveform Template
PRESET WAVEFORM TEMPLATE
= 100 Ω + 5%
T1/J1 Mode
TTIPn
TRINGn
250
500
Time (ns)
750
Cable
1000
R
LOAD
1250
V
OUT
81
3.24.1.2
which meets G.703, and it is measured on the near line side as shown in
Figure 34.
Table 60: PULS[3:0] Setting In T1/J1 Mode
OCTAL T1/E1/J1 LONG HAUL / SHORT HAUL TRANSCEIVER
Note: R
Figure 34. E1 Pulse Template Measurement Circuit
In E1 applications, the waveform template is shown in Figure 33,
-0.20
0.80
0.00
IDT82P2288
1.00
0.60
0.40
0.20
1.20
LOAD
Cable Configuration
-0.6
T1 - 133 ~ 266 ft
T1 - 266 ~ 399 ft
T1 - 399 ~ 533 ft
T1 - 533 ~ 655 ft
T1 - 0 ~ 133 ft
E1 Mode
Figure 33. E1 Waveform Template
J1 - 0 ~ 655 ft
= 75 Ω or 120 Ω (+ 5%)
-0.4
TRINGn
TTIPn
-0.2
Time In Unit Intervals
0
0.2
PULS[3:0]
R
LOAD
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 0 1 0
March 22, 2004
0.4
V
OUT
0.6
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