DS3150 Maxim Integrated Products, DS3150 Datasheet - Page 11

• Manufacturer Part Number: DS3150
• Description: 3.3V T3 / E3 / STS-1 Line Interface Unit
• Manufacturer: Maxim Integrated Products

Transmit Driver Monitor. If the transmit driver monitor detects a faulty transmitter, it activates the
DM output pin. When the transmitter is tri-stated (TTS = 0), the transmit driver monitor is also disabled.
The transmitter is declared to be faulty when the transmitter outputs see a load of less than about 25W.
The DM pin is only available in the TQFP package.
Transmitter Jitter Generation (Intrinsic). The transmitter meets the jitter generation requirements
of all applicable standards, with or without the jitter attenuator enabled.
Transmitter Jitter Transfer. Without the jitter attenuator enabled in the transmit side, the transmitter
passes jitter through unchanged. With the jitter attenuator enabled in the transmit side, the transmitter
meets the jitter transfer requirements of all applicable telecommunication standards in
Figure
Table 1-C. DS3 Waveform Template
Table 1-D. DS3 Waveform Test Parameters and Limits
Rate
Line Code
Transmission Medium
Test Measurement Point
Test Termination
Pulse Amplitude
Pulse Shape
Unframed All-Ones Power Level at
22.368MHz
Unframed All-Ones Power Level at
44.736MHz
Pulse Imbalance of Isolated Pulses
TIME (IN UNIT INTERVALS)
1-8.
-0.85 £ T £ -0.68
-0.85 £ T £ -0.36
-0.68 £ T £ 0.36
-0.36 £ T £ 0.36
PARAMETER
0.36 £ T £ 1.4
0.36 £ T £ 1.4
LOWER CURVE
UPPER CURVE
44.736Mbps (±20ppm)
B3ZS
Coaxial cable (AT&T 734A or equivalent)
At the end of 0 to 450 feet of coaxial cable
75W (±1%) resistive
Between 0.36V and 0.85V
An isolated pulse (preceded by two zeros and
followed by one or more zeros) falls within the
curves listed in
Between -1.8dBm and +5.7dBm
At least 20dB less than the power measured at
22.368MHz
Ratio of positive and negative pulses must be
between 0.90 and 1.10
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0.5 {1 + sin[(p/2)(1 + T/0.34)]} + 0.03
0.5 {1 + sin[(p/2)(1 + T/0.18)]} - 0.03
NORMALIZED AMPLITUDE
0.08 + 0.407e
SPECIFICATION
Table
EQUATIONS
-0.03
-0.03
0.03
1-C.
-1.84(T - 0.36)
Table
1-A. See