Instructions

Power subsystem
The Main board converts the +12 V power to +5 V, -5 V, +3.3 V, +2.5 V, +2 V, +1.8 V, +1.5 V, +1.1 V, 1 V, and 0.75 V, used by circuitry
throughout the system. The Front Panel board is powered on at all times when AC power is connected to the unit.
I/O ports (2 channel models)
The Main board provides USB ports (Host and Device), an Ethernet port (LAN), and an Aux Out trigger output connections.
I/O board (4 channel models)
The I/O board provides USB ports (Host and Device), an Ethernet port (LAN), and an Aux Out trigger output connections.
Front-panel board
The Front Panel board contains a microprocessor that reads the front-panel buttons and controls, sends this information to the processor
system on the Main board, and controls power to the Main board. The Front Panel board also generates the probe compensation output
signal and controls power to the Main board.
Theory of operation
TBS2000B Series Digital Storage Oscilloscopes Service Manual 14