Theory of Operation
TDS5000B Series Service Manual
3-3
The hard drive and CD-ROM provide access to stored waveform data and
software to customize your oscilloscope with your measurement needs. The
GPIB port allows for external control of the oscilloscope.
You can make hardcopies on the GPIB, RS-232, and Centronics ports. The P C
Interface board includes a VGA connector for an external monitor to di spl ay the
oscilloscope screen.
The PC motherboard has two USB ports and one serial port on the si de panel.
A microphone input and earphone output exist on the PC motherboard.
The Ethernet connector is RJ-45. Keyboard and mouse are both P S/2.
The power supply is a switching power converter with active power factor
control. It suppl i es power to all of the circuitry in the oscilloscope.
The ON/STBY switch, located on the front panel, controls all of the power to
the oscilloscope except for part of the circuitry in the standby power supply.
The power supply sends a Good signal to the processor system when the power
supply voltages are within specifications.
Power is distributed through the PC Interface board and the Disk Drive Adapter
board connectors.
The fan assembly provides forced air cooling for the oscilloscope. The fans are
controlled by the microprocessor.
The optional i nt ernal thermal printer allows for quick hard copies of the screen
display. The printer receives power and USB signals from the PC Interface
board.
Side Panels
Power Supply
Fans
Printer
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