8508A
Users Manual
• Device-Dependent Error - a reportable internal operating fault has been detected.
• Query Error - the controller is following an inappropriate message exchange
protocol, in attempting to read data from the output queue.
• Request Control - provided for devices which are able to assume the role of
controller. This capability is not available in the 8508A.
• Operation Complete - initiated by a message from the controller, indicates that the
8508A has completed all selected pending operations.
Measurement events
The following events are flagged in another 8-bit latched register, called the
Measurement Event Status Register (MESR), read-accessible to the controller.
• A measurement has been completed from an initiating trigger.
• When the instrument has been commanded to store a number of measurements in a
block, and the specified number of measurements in the block has been stored.
• Mathematical Overflow
• Overload
• Low Limit Reached
• High Limit Reached
• New Minimum Value Established
• New Maximum Value Established
Syntax Diagrams of Major 8508A Functions
DC Voltage
The following commands are used to select the
DCV function and set its configuration.
,
DCV
phs
Nrf
AUTO
FILT_ON
FILT_OFF
RESL5
RESL6
RESL7
RESL8
FAST_ON
FAST_OFF
TWO_WR
FOUR_WR
adj209f.eps
DC Voltage
4-10
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