Symmetricom SDU-2000, User Manual

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12713020-002-2 Revision D – April 2004 SSU-2000 User’s Guide 177
Output Module Reference Data
E1 Output Module
Performance Specifications
The E1 Output Module performance specifications are provided in Table 8-2 .
SOURCE C Green/Amber On (Green) = The Bypass clock (Clock C) is the selected
source clock. See
Bypass Clock (Clock C) , on page 32
On (Amber) = Faulty or missing Bypass clock
Off = Bypass clock is ignored, or good and not selected
SOURCE D Green/Amber On (Green) = The Expansion clock (Clock D) is the selected
source clock. The module is in an Expansion shelf
On (Amber) = Faulty or missing Expansion clock
Off = Expansion clock is ignored, or good and not selected
OUTPUT
FAULT Amber On = Module has detected one or more faulty outputs
Off = All output signals are good
Table 8-2. E1 Output Module Performance Specifications
Performance Characteristic Specification
Signal Alternate Mark Inversion (AMI)
Waveshape Per ITU-T CC (10/98)
Rise time <100 ns
Pulse Width 244 ns, nominal into 120
Ω
Pulse Interval 488 ns, nominal
Duty Cycle 50%
Pulse Amplitude 2.2 to 3.3 Vpp
Jitter < 0.01 UI
Number of Outputs 20
Table 8-1. E1 Output Module Status LED Indicators (Continued)
Indicator Color Description