Theory of Operation
CSA7404B, TDS7704B, TDS7404B, TDS7254B & TDS7154B Service Manual
3-3
Bridge Board. Both processor systems and the display system are connected
together by, and communicate through, the bridge board.
The hard drive and CD provide access to stored waveform data and software to
customize your instrument with your measurement needs. The GPIB allows for
external control of the instrument.
You can make hardcopies on the GPIB, RS-232, and Centronics ports. Another
port from the CPU board: cal adjust lock.
The ATX board has two US B ports and one serial port on the rear panel. The
ATX has 2 USB channels, but one is used internally and is not available for use.
The ATX has one serial port, which is routed to the rear panel. A microphone
input and earphone output exist on the ATX rear panel. Ethernet connector is
RJ-45. Keyboard and mouse are both PS/2.
The low voltage power supply is a switching power converter with active power
factor control. It supplies power to all of the circuitry in the instrument.
The principal POWER switch, located on the rear panel, controls all power to
the instrument including the Low Voltage Power Supply. The ON/ST BY switch,
located on the front panel, also controls all of the power to the instrument except
for part of the circuitry in the standby power supply.
The power supply sends a power fail (~PF) warning to the processor system if
the power is going down.
Power is distributed throughout the instrument through the front and rear power
distribution bus boards.
The fan assembly provides forced air cooling for the instrument. The fans are
controlled by the CPU and microprocessor.
Rear Panel
Low Voltage Power Supply
Fans
To Next Page
Loading...
