1-85
Troubleshooting
Overall Description
Overall Description
The overall description provides a functional overview of the Agilent PSG signal generators. Some
of the functional blocks discussed are common to many types of instruments, while others are more
specific to analog and digital signal generators.
Common functions:
• A19 Power Supply
• A18 CPU
• Input/Output Interface
Specific signal generator functions:
• Frequency Generation
• Output Power Level/Automatic Leveling Control
• Analog Modulation and Digital Modulation
A19 Power Supply
Voltages
The main power supply converts line voltage (120 Vac or 240 Vac) to regulated dc voltages. Some of
the required dc voltages are not directly available from the main power supply and are provided by
re–regulating one of the main power supply voltages to the required voltage. This regulation can
take place on any assembly and is then routed to the required assemblies.
Line Module
The line voltage connects to the power supply through the A22 Line Module. Because the power
supply automatically detects and adjusts to different line voltages, manual line voltage selection is
neither necessary nor available. The power supply has an internal line fuse that cannot be replaced.
If the fuse opens, the power supply must be replaced.
Power Supply Thermal Sensors
Two thermal sensors prevent the signal generator from overheating. One sensor is internal to the
A19 Power Supply; the other sensor is on the A8 Output. If the signal generator goes into thermal
shutdown, the amber and green LEDs on the front panel blink on and off.
To Next Page
Loading...
Need help?
General
