Agilent Technologies HP 8719D Service Manual page 335

Al Front Panel
The Al front panel assembly provides user interface with the analyzer. It
includes the keyboard for local user inputs, and the front panel LEDs that
indicate instrument status. The RPG (rotary pulse generator) is not electrically
connected to the front panel, but provides user inputs directly to the front
panel processor.
The A2 front panel processor detects and decodes user inputs from the front
panel and the RPG, and transmits them to the CPU. It has the capability to
interrupt the CPU to provide information updates. It controls the front panel
The A7 CPU assembly contains the main CPU (central processing unit), the
digital signal processor, memory storage, and interconnect port interfaces.
The main CPU is the master controller for the analyzer, including the other
dedicated microprocessors. The memory includes EEPROM, RAM, EPROM, and
ROM.
Data from the receiver is serially clocked into the A7 CPU assembly from
the A10 digital IF. The data takii sequence is triggered either from the
The A7 CPU assembly contains the main CPU (central processing unit), the
digital signal processor, memory storage, and interconnect port interfaces.
The main CPU is the master controller for the analyzer, including the other
dedicated microprocessors. The memory includes EEPROM, DRAM, flash ROM,
SRAM, and boot ROM.
Data from the receiver is serially clocked into the A7 CPU assembly from
the A10 digital IF The data taking sequence is triggered either from the