Keithley 2000, User Manual, Page: 107 / 280

Enable registers
As Figure 4-5 shows, each status register set has an enable register. An enable register is pro-
grammed by you and serves as a mask for the corresponding event register. An event bit is
masked when the corresponding bit in the enable register is cleared (0). When masked, a set bit
in an event register cannot set a bit in the Status Byte Register (1 AND 0 = 0).
To use the Status Byte Register to detect events (i.e., serial poll), you must unmask the events
by setting (1) the appropriate bits of the enable registers.
To program and query the Standard Event Status Register, use the *ESE and *ESE? Common
Commands respectively. All other enable registers are programmed and queried using the :EN-
ABle and :ENABLe? commands in the STATus Subsystem. See Section 5 for more information.
An enable register is not cleared when it is read. The following operations affect the enable
registers:
• Cycling power - Clears all enable registers
• :STATus:PREset clears the following enable registers:
Operation Event Enable Register
Questionable Event Enable Register
Measurement Event Enable Register
*ESE 0 - Clears the Standard Event Status Enable Register.
Remote Operation 4-21