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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.