2
Theory of Operation
60
Keysight 8990B Service Guide
Front Panel
The front panel keyboard has a breakaway section that interfaces to the keyboard.
This breakaway section receives the power supply nets from the acquisition board.
The keyboard links to the PC motherboard through a high-speed USB 2.0
interface. The on-board USB hub serves the PIC microcontroller, touch screen
controller board, and up to three front panel USB connectors as user’s
peripherals.
A conductive element on the inside of each key shorts a gap on the underlying
keyboard circuit board. The keyboard controller detects this short and sends the
proper keypress information to the system controller on the motherboard.
There are 12 knobs located on the front panel.
Hard Disk Drive
The hard disk drive is a high-capacity and shock-resistant unit. It is used to store
the peak power analyzer operating system and certain system configuration data.
The hard disk drive can also be used to store and recall the peak power analyzer
setups and waveforms.
NOTE
Option U02 is not integrated with the three front panel USB connectors.
Содержание 8990B
Страница 1: ...Keysight 8990B Peak Power Analyzer Service Guide ...
Страница 12: ...12 Keysight 8990B Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...
Страница 16: ...16 Keysight 8990B Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...
Страница 18: ...18 Keysight 8990B Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...
Страница 62: ...2 Theory of Operation 62 Keysight 8990B Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...
Страница 136: ...4 Repair Guide 136 Keysight 8990B Service Guide Figure 4 54 Remove the seven screws ...
Страница 150: ...4 Repair Guide 150 Keysight 8990B Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...