304 Keysight NFA Series Noise Figure Analyzers Service Guide
Power Supply/Midplane Troubleshooting
A6 Power Supply Description
A6 Power Supply Description
Purpose
The A6 Power Supply assembly provides all the necessary DC voltages for the
entire signal analyzer to operate correctly. If any of the power supplies are not
within their operating voltages, the analyzer will not function. The power
supply outputs provide power to all the printed circuit boards, microcircuit
assemblies, front panel display and fans, any of which can cause an over
current condition if not operating correctly. The power supply will remain on in
an over current state for a minimum of 0.1 second. The power supply will turn
off no later than 0.4 seconds after the beginning of the over current state. Any
one output over current condition will latch the supply off until the line voltage
is removed from the rear panel AC power input connector and then
reconnected. The power supply assembly plugs into the A7 Midplane Assembly
from the rear of the instrument. (see Figure 10-1.)
Figure 10-1 Power Supply and Midplane
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