Spectracom SAS17E, Руководство пользователя

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Spectracom Corporation EPSILON Switch & Amplifier System E
User’s Manual 1-1
1 1 1 1 Introduction Introduction Introduction Introduction
This document is the User’s Manual for the EPSILON Switch and Amplifier System E17 and the
EPSILON Switch and Amplifier System E36. (Unless otherwise indicated, details contained
herein apply to both models.)
The SAS-E achieves redundant Time & Frequency source monitoring with intelligent and
automatic switching. It amplifies signals from the selected source and offers a large quantity of
output channels. The SAS-E receives, and monitors continuously, signals from 1 or 2 external
clocks:
•
Frequency sine wave signal (from 1 MHz up to 16 MHz)
•
1 pulse per second time synchronization (TTL/50 Ω )
•
Time Of Day message (RS232C serial line)
•
External signals
•
External clock status (relay contact)
Monitoring results (lost signal and minimal period detection) are reported to the user through
dedicated LEDs and through an Ethernet port. When 2 external clocks are connected, the
SAS-E offers a powerful redundant function by selecting, automatically, the better source. This
automatic selection may be by-passed by the user to allow maintenance or for single clock
operation.
In all cases, the distributed signals — Frequency, 1 Pulse Per Second (PPS), Time of Day
(ToD) — are issued from the same source clock. In automatic mode, when the current selected
source is detected faulty, the SAS-E switches all the distributed signals to the other source. An
Ethernet port allows managing and controlling the SAS-E through embedded SNMP protocol
and/or web server.
The SAS-E is available in two heights to adapt the output capacity to the user’s requirements:
SAS17E — 1u High Version:
8 x frequency outputs, 8 x 1PPS outputs, 2 x ToD outputs, 2 x external signals.
SAS36E — 2u High Version:
16 x frequency outputs, 16 x 1PPS outputs, 2 x ToD outputs, 2 x external signals.