Output Module Reference Data
Composite Clock Output Module
184 SSU-2000 User’s Guide 12713020-002-2 Revision D – April 2004
Performance Specifications
The performance specifications for the Composite Clock Output module are
provided in Table 8-6.
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 8-6. Composite Clock Output Module Performance Specifications
Performance Characteristic Specification
Signal Bipolar, Return to Zero, Alternate Mark
Inversion (AMI)
Waveshape Per Bellcore GR-378-CORE Table 6-2 and
Figure 6-1
Rise/Fall time <500 ns
Pulse Width 9.8 µs ±2% for 62.5/37.5 duty cycle
7.8 µs ±2% for 50/50 duty cycle
Pulse Interval 15.6 µs, nominal
Duty Cycle 62.5/37.5 or 50/50 selectable
Pulse Amplitude 2.7 to 5.5 Vpk, 3.5 Vpk nominal into 133 Ω
Number of Outputs 20 Independent Channels
Table 8-5. Composite Clock Output Module Status LED Indicators (Continued)
Indicator Color Description
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