Datasheet

DS3150
12 of 28
Table 1-E. STS-1 Waveform Template
TIME (UNIT INTERVALS)
NORMALIZED AMPLITUDE
EQUATIONS
UPPER CURVE
-0.85 £ T £ -0.68
0.03
-0.68 £ T £ 0.26 0.5 {1 + sin[(p/2)(1 + T/0.34)]} + 0.03
0.26 £ T £ 1.4
0.1 + 0.61e
-2.4(T - 0.26)
LOWER CURVE
-0.85 £ T £ -0.36
-0.03
-0.36 £ T £ 0.36 0.5 {1 + sin[(p/2)(1 + T/0.18)]} - 0.03
0.36 £ T £ 1.4
-0.03
Table 1-F. STS-1 Waveform Test Parameters and Limits
PARAMETER SPECIFICATION
Rate
51.840Mbps (±20ppm)
Line Code B3ZS
Transmission Medium Coaxial cable (AT&T 734A or equivalent)
Test Measurement Point At the end of 0 to 450 feet of coaxial cable
Test Termination
75W (±1%) resistive
Pulse Amplitude 0.800V nominal (not covered in specs)
Pulse Shape
An isolated pulse (preceded by two zeros and
followed by one or more zeros) falls within the
curved listed in Table 1-E
.
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