Manual

P ART T WO : COMMANDS
142 ISSUED: February 2005 WM-RCM-E Rev D
ADDITIONAL INFORMATION
S TANDARD E VENT S TATUS R EGISTER (ESR)
Bit Bit Value Bit Name Description See Note ...
15...8 0 Reserved by IEEE 488.2
7 128 PON 1 Power off-to-ON transition has occurred 1.
6 64 URQ 1 not used 2.
5 32 CME 1 CoMmand parser Error has been detected 3.
4 16 EXE 1 EXecution Error detected 4.
3 8 DDE 1 Device Dependent (specific) Error occurred 5.
2 4 QYE 1 QuerY Error occurred 6.
1 2 RQC 0 Oscilloscope never ReQuests bus Control 7.
0 1 OPC 0 OPeration Complete bit not used 8.
N
N
O
O
T
T
E
E
S
S
:
: (refer to table above)
1. The Power On (PON) bit is always turned on (1) when the unit is powered up.
2. On older LeCroy scopes, this bit reports softkey inputs. It does not apply to X-Stream scopes.
3. The CoMmand parser Error bit (CME) is set true (1) whenever a command syntax error is
detected. The CME bit has an associated CoMmand parser Register (CMR) which specifies the
error code. Refer to the query CMR? for further details.
4. The EXecution Error bit (EXE) is set true (1) when a command cannot be executed due to some
device condition (e.g., oscilloscope in local state) or a semantic error. The EXE bit has an
associated Execution Error Register (EXR) that specifies the error code. Refer to query EXR? for
further details.
5. The Device specific Error (DDE) is set true (1) whenever a hardware failure has occurred at
power-up or at execution time, such as a channel overload condition, or a trigger or timebase
circuit defect. The origin of the failure can be localized with the DDR? query.