![background image](http://html.mh-extra.com/html/symmetricom/sdu-2000/sdu-2000_user-manual_1419622184.webp)
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
SOURCE C
Green/Amber
On (Green) = The Bypass clock (Clock C) is the selected
source clock. See
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
µ
s
±
2% for 62.5/37.5 duty cycle
7.8
µ
s
±
2% for 50/50 duty cycle
Pulse Interval
15.6
µ
s, 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
Summary of Contents for SDU-2000
Page 12: ...12 SSU 2000 User s Guide 12713020 002 2 Revision D April 2004 ...
Page 18: ...18 SSU 2000 User s Guide 12713020 002 2 Revision D April 2004 ...
Page 390: ...SNMP Protocol 390 SSU 2000 User s Guide 12713020 002 2 Revision D April 2004 ...
Page 420: ...I O Connector Grounding 420 SSU 2000 User s Guide 12713020 002 2 Revision D April 2004 ...