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Publication No. 980938 Rev. K
Model T940 User Manual
Astronics Test Systems
UR14 Driver/Receiver Board I-15
TEMP ALARMS Real-time temperature monitors for the Pin Electronics
Driver and Receivers to protect the UR14 board.
CBUS
An internal Control Bus connecting the VXI Bridge to the
Data Sequencers and the Driver/Receiver board’s Control
Logic.
SBUS
This bus allows the UR14 Control Logic to read and write
programmable Driver and Receiver References and
configuration.
SERIAL BUS
Communication and control by the UR14 Logic of the DAC
and ADC are facilitated by this bus.
UR14 Control Logic
This control logic provides facilitates UR14 functions including; access to the
Pin Electronics devices, Temperature Monitoring programming, Voltage,
Over-voltage and Over Temperature detection.
Firmware and Calibration Storage
The UR14 Control Logic FPGA firmware is loaded via a serial PROM on
power up or VXI Reset. The firmware is field upgradeable using our supplied
loader utility. UR14 calibration data is stored in an on-board EEPROM and is
loaded initialization of the T940 unit. UR14 power on time is stored for
reference using an on-board timer.
External Probe Module Block Diagram
The External Probe Module (Figure I-10) is connected to the UR14 via a
cable and mounted externally. It provides the interface for probe functions
designed into the T940 Sequencer Logic to support probe functions.