Symmetricom SDU-2000, Руководство пользователя

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Output Module Reference Data
DS1 Output Module
180 SSU-2000 User’s Guide 12713020-002-2 Revision D – April 2004
Performance Specifications
The DS1 Output module specifications are provided in Table 8-4 .
Table 8-3. DS1 Output Module Status LED Indicators
Indicator Color Description
POWER Green On = +5 vDC power available on the Output module
Off = +5 vDC not present on the module
STATUS Green/Amber On (Green) = Module functioning correctly
Blinking Amber = Output module is downloading firmware
On (Amber) = Output module failure
SOURCE A Green/Amber On (Green) = Clock A in slot 1 is the selected source clock
On (Amber) = Faulty or missing Clock A
Off = Clock A is good and not selected
SOURCE B Green/Amber On (Green) = Clock B in slot 13 is the selected source clock
On (Amber) = Faulty or missing Clock B
Off = Clock B is good and not selected
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 8-4. DS1 Output Module Performance Specifications
Performance Characteristic Specification
Signal Alternate Mark Inversion (AMI)
Waveshape Per (ANSI) T1.102 and ITU Rec. G.703
Rise time <100 ns
Pulse Width 324 ns, nominal into 100
Ω
Pulse Interval 648 ns, nominal
Duty Cycle 50%
Pulse Amplitude 2.4 to 3.6 Vpp
Jitter < 0.01 UI