Symmetricom 58502A User Manual download pdf (Page 77)

Chapter 5 Functional Description

Functional Block Description of the 58502A

User’s Guide 5-5

1-to-12 Amplifiers and Isolators Block

This block consists of twelve separate individual isolation amplifiers

that accomplish the distribution of the source frequency (ranging from

100 kHz to 10 MHz) into twelve available output channels with very

low phase noise and signal distortion at the rear-panel output BNC

connectors. In addition, each output is impervious to the effects an

adjacent channel short or open connection during normal operation.

A single input signal feeds all twelve isolation amplifiers that is routed

from the output of the 2-to-1 Switch block. This block includes BITE

hardware (Built In Test Equipment) that monitors the presence of all

twelve outputs and routes this information to the Controller block via

the output condition signal line.

Power Supply Module Block

This block provides +5, +15, and -15 Vdc to all other blocks in the

instrument. When ac power is used, it provides fuse protection, steps

down, rectifies, filters, regulates, and distributes internal dc power.

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Symmetricom 58502A User Manual Page 77