Rainbow Electronics DS3150 User Manual
Page 8
DS3150
8 of 22
Table 1D. T3 TRANSMIT WAVEFORM TEST PARAMETERS AND LIMITS
PARAMETER SPECIFICATION
Rate
44.736Mbps (
±
20ppm)
Line Code
B3ZS
Transmission Medium
Coax cable (AT&T 734A or equivalent)
Test Measurement Point
At the end of 0ft to 450ft of coax cable
Test Termination
75
Ω
(
±
1%) resistive
Pulse Amplitude
Between 0.36V and 0.85V
Pulse Shape
An isolated pulse (preceded by two zeros and followed by
one or more zeros) falls within the curves listed in Table 1C
Unframed All Ones Power Level
at 22.368MHz
Between -1.8dBm and +5.7dBm
Unframed All Ones Power Level
at 44.736MHz
At least 20dB less than the power measured at 22.368MHz
Pulse Imbalance of Isolated Pulses
Ratio of positive and negative pulses must be between 0.90
and 1.10
Table 1E. STS-1 TRANSMIT WAVEFORM TEMPLATE
TIME AXIS RANGE
NORMALIZED AMPLITUDE EQUATIONS
-0.85
≤
T
≤
-0.68
0.03
-0.68
≤
T
≤
0.26
0.5 {1 + sin[(
π
/ 2)(1 + T / 0.34)]} + 0.03
Upper
Curve
0.26
≤
T
≤
1.4
0.1 + 0.61e
-2.4(T - 0.26)
-0.85
≤
T
≤
-0.36
-0.03
-0.36
≤
T
≤
0.36
0.5 {1 + sin[(
π
/ 2)(1 + T/0.18)]} - 0.03
Lower
Curve
0.36
≤
T
≤
1.4
-0.03
Governing Specifications: Bellcore GR-253 and Bellcore GR-499
Table 1F. STS-1 TRANSMIT WAVEFORM TEST PARAMETERS AND LIMITS
PARAMETER SPECIFICATION
Rate
51.840Mbps (
±
20ppm)
Line Code
B3ZS
Transmission Medium
Coax cable (AT&T 734A or equivalent)
Test emasurement Point
At the end of 0ft to 450ft of coax cable
Test Termination
75
Ω
(
±
1%) resistive
Pulse Shape
An isolated pulse (preceded by two zeros and followed by
one or more zeros) falls within the curved listed in Table 1E
Unframed All Ones Power Level
at 25.92MHz
Between -1.8dBm and +5.7dBm
Unframed All Ones Power Level
at 51.84MHz
At least 20dB less than the power measured at 25.92MHz