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Service Guide E8364-90026
Theory of Operation
PNA Series Microwave Network Analyzers
Power Supply Group Operation
E8362B, E8363B, E8364B
Power Supply Group Operation
The A4 power supply assembly is a switching power supply operating at 103 kHz
switching frequency. The input power ranges for the power supply are 90 to 132 Vac or
195 to 250 Vac. The power supply automatically senses the input voltage and switches
between these two ranges.
The dc output voltages are:
• +5.2 V
•
−
5.2 V
• +9 V
• +15 V
• +15 V standby (always on)
•
−
15 V
• +22 V
• VCC (5.2 V for the A15 CPU board)
• VDL (3.3 V to the A15 CPU board)
The +15 V standby line remains on continuously whenever the power supply is plugged in.
This line is used to provide power to front panel LEDs and CPU components when the
analyzer is turned off.
An addi32 V supply line is generated on the A14 system motherboard from the +22
V supply line.
NOTE
If the power supply senses an over-voltage or over-current condition on any of
the supply lines, the power supply will cycle on and off at a low voltage level
(burp mode).
Summary of Contents for E8362B
Page 11: ...Service Guide E8364 90026 1 1 1 Safety and Regulatory Information ...
Page 19: ...Service Guide E8364 90026 2 1 2 General Product Information ...
Page 33: ...Service Guide E8364 90026 3 1 3 Tests and Adjustments ...
Page 83: ...Service Guide E8364 90026 4 1 4 Troubleshooting ...
Page 151: ...Service Guide E8364 90026 5 1 5 Theory of Operation ...
Page 185: ...Service Guide E8364 90026 6 1 6 Replaceable Parts ...
Page 269: ...Service Guide E8364 90026 7 1 7 Repair and Replacement Procedures ...
Page 351: ...Service Guide E8364 90026 8 1 8 General Purpose Maintenance Procedures ...