Tektronix AWG7000 Series, Service Manual

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Theory of Operation
AWG7000 Series Service Manual
2-3
Module Overviews
A Microsoft Windows processor system is the primary controller of the instrument.
The instrument features an XGA resolution flat-panel display, a transparent touch
screen, and a front panel with direct access to commonly used instrument
functions. You can also make complete use of the instrument with a mouse and a
keyboard.
Front Panel (FP) Board Push-button switches on the Front Panel (FP) board are read by an embedded micro
controller, which sends the button and knob change information to the
µ
ATX board
via a USB path. The FP board consists of the following blocks:
„
USB controller (Cypress EZ-USB FX1)
„
FPGA (Altera Cyclone)
„
Key switch matrix
„
LED indicators (Tri-Color and Mono-Color)
LCD Adapter (LCDA) Board
The LCDA board supports interconnection between the
µ
ATX board and FP
board. Two internal USB ports come from the
µ
ATX board. One USB connects to
a touch panel controller. The other connect to a micro controller on the FP board.
Connectors related to the LCD are also included. The LCDA board consists of the
following blocks:
„
Touch-panel controller
„
Rotary encoder (signal goes to the FP board)
„
LCD back light controller
„
Connector to LCD
Multi-Input/Output (MIO)
Board
The MIO board coordinates the flow of data through the Windows PCI port from
various devices that communicate with the
µ
ATX system. The devices include the
display system, GPIB, TekLink, and data flow (PCIF) path to the waveform
generator system. An EEROM on this board is used to store the instrument setting
and calibration data. The MIO board consists of the following blocks:
„
PCI controller
„
GPIB controller
„
LCD display controller (ATI Mobility-MI)
„
PCI target adapter
„
PLD140 (Xilinx FPGA)
„
EEPROM for calibration data storage
„
TekLink interface