8144 Clock Selector & Distribution Amplifier, detects clock signal failure

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T1/E1 Clock Selector and Amplifier

The Spectracom Model 8144 Clock Selector / Distribution Amplifier detects failure of input clock and provides manual or automatic switchover between two clock sources. The selected input is distributed via twelve buffered output line drivers.

Overview

Technical Specifications

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Timing Failure Detection Automates Switchover to Backup Source
Double Input (Selector/Distribution Amplifier) or Single Input (Distribution Amplifier)
Twelve Distribution Outputs
User Configurable with Switch Parameters, Alarm Latching, Bridging of Inputs, DS1 Line Build Out, and DS1 Outputs D4 or ESF
5-Year Warranty

Technical Specifications

Clock Outputs	Twelve individually buffered DS1 framed all ones, (optionally RS-485 or E1) derived from the selected input. DS1’s may be set for ESF or D4 framing and LBO to 655 feet.
Clock Inputs	Two DS1’s, with D4 or ESF framing (optionally RS-485 or E1). Selectable bridging or terminating input impedance.
Reference Switching	Normally non-revertive, but may be set to give priority to Input Channel A. Switchover occurs with Loss of Signal (LOS) or Alarm Indication Signal (AIS) at the selected reference input; when an external alarm is sensed; or when manual selection is made.
Alarm Outputs	Major and minor alarms activated by LOS, AIS, or external alarm input. Relay contacts SPDT, 2A @ 30 VDC.
External Alarm Inputs	One for each input channel; grounding or RS-422/485 level activation. Activates switchover and alarm outputs.
Power	115/230 VAC ±15%, 50/60 Hz; 15 W (standard). 12 - 24 VDC Option: 11 to 32 VDC; 12 W. 48 VDC Option: 55.2 VDC ±20%; 12 W. DC options provide dual fused inputs and reverse polarity protection.

Physical & Environmental

Size	EIA 19" rack W x 3.5"H x 10"D
Weight	6 lbs. maximum
Connectors	Clock I/O: Pluggable terminal strip Alarm I/O: Pluggable terminal strip AC power:3-prong connector, 7' cord included DC power: Terminal strip
Switches	Power, manual or automatic mode, manual input selection
Indicators	Major & minor alarms, A & B input ready, A or B input selected
Temperature	0°to +60°C operating range -40°C to +85 °C storage temperature
Humidity	95% R.H. non-condensing

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Time and Frequency Distribution

T1/E1 Clock Selector and Amplifier

Technical Specifications

Physical & Environmental