Theory of operation
Display panel
Waveforms, spectral tra ces, measurement results, and control menus are displayed
on a 10.4 inch, color, active-matrix LCD display with touch p anel.
Display system
The display system consists of a display adapter board. The display adapter board
sends text and waveform information to the display panel.
Touch panel
The displa
y adapter board sends inform ation from the touch panel to the processor.
The touch panel is listed as a USB HID device in the Window Device Manager
tool.
Front panel
The processor system detects changes in the front-panel switches and encoder. The
processor also turns the LEDs on and off. Communication between the processor
system and the front panel is performed over an internal USB connection.
The ON/STBY switch passes through the display adapter board, the PC carrier
board, the digital interface board, and to the PC board.
The removable HDD (hard disk drive) communicates over a SATA connection
directly to the processor system.
Rear
panel
The following table describes the rear panel connectors.
Ta ble 1-1: Rear panel connectors
Name
Input or
Output
Connector
type Description
Reference In
Input
BNC External time-base reference. See data
sheet for signal quality r equirements.
Reference
Out
Output BNC 10 MHz output or loop-through of user
Reference In s ignal
LAN
Input/Output
RJ-45
10/100/1000baseT Ethernet connector
USB Input/Output USB Two USB 2.0 connectors
Keyboard Input
PS/2 Keyboard-only PS/2 connector
VGA Output D-Sub
External monitor connector
Serial Input/Output D-Sub Serial communications port (COM1) to
processor system
Trigger In Input
BNC TTL Gate/trigger input signal
RSA5100B Series Service Manual 1–3
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