2 Programming the Test Set
STATus Subsystem
byte register will be set to 1, send the command *ESE 192 (128 + 64). The command *ESE? returns the
decimal value of the sum of the bits previously enabled with the *ESE <integer> command.
The standard event status enable register presets to zeros (0).
Operation and Questionable Status Registers
The operation and questionable status registers are registers that monitor the overall instrument
condition. They are accessed with the STATus:OPERation and STATus:QUEStionable commands in the
STATus command subsystem. See the figure at the beginning of this chapter.
Operation Status Register
The operation status register monitors the current instrument measurement state. It checks to see if the
instrument is calibrating, sweeping, or waiting for a trigger. For more information see the *OPC? command
located in the IEEE Common Commands section.
Bit
Condition
Operation
0
Calibrating
The instrument is busy executing its Align Now process
3
Sweeping
The instrument is busy taking a sweep.
4
Measuring
The instrument is busy making a measurement. Measurements often
require multiple sweeps. They are initiated by keys under the MEASURE key
or with the MEASure group of commands.
The bit is valid for most X-Series Modes.
5
Waiting for trigger
The instrument is waiting for the trigger conditions to be met, then it will
trigger a sweep or measurement.
Questionable Status Register
The questionable status register monitors the instrument’s condition to see if anything questionable has
happened to it. It is looking for anything that might cause an error or a bad measurement like a hardware
problem, an out of calibration situation, or a unusual signal. All the bits are summary bits from lower-level
event registers.
Bit
Condition
Operation
66
Sequence Analyzer User's & Programmer's Reference
