Symmetricom 58502A Manuel d'utilisateur télécharger pdf (Page 8)

In This Guide

viii User’s Guide

Description of the 58502A Broadband

Distribution Amplifier

Overview

The 58502A is a 1-to-12 Broadband Distribution Amplifier that is used

to distribute precision sine wave signals from Cesium, Rubidium,

quartz, or GPS frequency standards. It provides 12 outputs of the

source frequency, which can range from 100 kHz to 10 MHz, and is

designed for site frequency distribution for manufacturing, R&D, and

standards lab environments.

In addition, the 58502A may be used as a standalone precision signal

source by operating only from its optional internal oscillator.

The 58502A Broadband Distribution Amplifier has low signal

distortion and very high isolation between output channels

(OUTPUTS 1-12). Low output phase noise also helps maintain the

spectral purity of the source input signal, entering the 58502A through

the INPUTS A or B channel.

Auto-Switching and Alarm-Inputs Features

The 58502A has two features that ensure your critical frequencies are

always present. First, there is the auto-switching feature. When the

58502A detects one of its inputs is removed or the amplitude of the

input is greatly reduced, it will automatically switch to the other input.

Second, there is the alarm-inputs feature. The 58502A is compatible

with the alarm signals from the 58503A GPS Time and Frequency

Reference Receiver and the 5071A Primary Frequency Standard. If the

alarm of one of these sources is active, the 58502A switches to the

other input source, and it can reflect the alarm in its own alarm

outputs and route this information to the ALARM/STATUS port.

Auto switching between two inputs ensures continuous availability of

critical frequencies, and a fault alarm is activated when the system is

not functioning correctly.

The auto-switching and alarm-inputs features can also be monitored

and controlled through the RS-232 serial interface port.

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Symmetricom 58502A Manuel d'utilisateur Page 8