*ESR? (Event Status Register)
Instrument:
N1000A
DCA-M
N1010A
Meas. mode:
Scope
Eye
Jitter
TDR
Flex Apps:
FlexDCA
FlexRT
Query Syntax
*ESR?
Description
Reads the Standard Status Event Register to determine the status of individual status bits. The decimal-weighted value of the register is returned. Reporting of Standard Status Event Register bits in the status register system is controlled by the mask loaded into the enable register. All true event bits, that are enabled, are logically "AND"ed, which results in a Bit 5 (ESB) being set in the Status Byte Register.
To enter a mask into the enable register, use the *ESE common command.
| Register | Read | Write | Command |
|---|---|---|---|
| Event | ♦ | *ESR? | |
| Enable (mask) | ♦ | ♦ | *ESE |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|---|---|---|---|---|---|---|---|---|
| Bit Weight |
128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 |
| Event Register |
PON | URQ | CME | EXE | DDE | QYE | RQL | OPC |
| Enable Register |
||||||||
| Sets |
 to Bit 5 (ESB) in Status Byte Register |
|||||||
Bit Definitions
- OPC
- A true indicates that an operation is complete.
- RQL
- Not used. Permanently set to zero.
- QYE
- A true indicates that a query error has been detected.
- DDE
- A true indicates that a device-dependent error has been detected.
- EXE
- A true indicates that an execution error has been detected.
- CME
- A true indicates that a command error has been detected.
- URQ
- Not used. Permanently set to zero.
- PON
- A true indicates that an off-to-on transition has occurred.