Spectracom 8144-DD, Инструкция по эксплуатации

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Section 1: General Information
Instruction Manual 8144-DD/075020 Page 1-3
1.5 CONFIGURATION OPTIONS
The Model 8144-DD Clock Selector/Distribution Amplifier can be ordered in a variety of
power and mounting configurations. When specific configurations are referenced in this
Instruction Manual, the format 8144-DD-P-M is used, P and M are the power and
mounting option designations, respectively. The options are listed below in Table 1-1,
Configuration Summary.
Option Type Option Designation
Power
(P)
AC (Standard)
12 to 24 VDC Power
48 VDC Power
(none)
52
54
Mounting
(M)
19" Rack (Standard)
19" Rack with Slides
23/24" Rack
19" Setback Rack
(none)
11
102
103
TABLE 1-1 CONFIGURATION SUMMARY
1.6 SPECIFICATIONS
1.6.1 Inputs
The Model 8144-DD accepts one or two clock inputs as well as one or two alarm inputs.
DS1 CLOCK INPUTS
The DS1 clock inputs comply with ANSI T1.102-1987 as follows:
Line Rate: 1.544 Mb/s
Tolerance: ±130 ppm (200.72 Hz)
Level: 1.0 to 3.6V base-to-peak
Termination: Balanced twisted pair
Impedance: Terminated: 100 ohms ±5%, bridging >1500 ohms
Pulse Shape: Per ANSI T1.102-1987