Teledyne Lecroy WaveAce 1000, Command Reference Manual, Page: 13 / 92

Operator's Manual
Read ESR using the *ESR? query. The response is the binary weighted sum of the register bits. The
register is cleared with *ESR? or ALST?, with *CLS, or when power is applied to the scope. For example,
the response message *ESR 160 indicates that a command error occurred and the ESR is being read for
the first time after power-on. The value 160 can be broken down into 128 (Bit 7) plus 32 (bit 5). See the
table with the ESR command description in Part Two for the conditions corresponding to the bit set.
The Power ON bit appears only on the first *ESR? query after power-on (since the query clears the
register). You can determine this type of command error by reading the CMR bit with CMR?. It is not
necessary to read/ clear this register in order to set the CMR bit in the ESR on the next command error.
Standard Event Status Enable Register (ESE)
This register allows you to report one or more events in the ESR.
Modify ESE with *ESE and clear it with *ESE 0 (or by powering-on the oscilloscope). Read it with *ESE?.
For example, use
*ESE 4
to set bit 2 (decimal 4) of the ESE Register to enable query error reporting.
Internal State Change Status Register (INR)
INR reports the completion of a number of internal operations (the events tracked by this 16-bit-wide
register are listed with the INR? description in Part II).
Read the register using INR?. The response is the binary weighted sum of the register bits. Clear the
register with INR? or ALST?, a *CLS command, or when power is applied to the oscilloscope.
Command Error Status Register (CMR)
This register contains the code of the last command error detected by the oscilloscope. List these error
codes using CMR?.
Read CMR with CMR?. The response is the error code. Clear the register with a CMR? or ALST? query, a
*CLS command, or when power is applied to the oscilloscope.
Device Dependent Error Status Register (DDR)
DDR indicates the type of hardware errors affecting your instrument. Individual bits in this register
report specific hardware failures. List them using DDR?.
Also, read this register using the DDR? query. The response is the binary weighted sum of the error
bits. Clear it with another DDR? or with ALST?, a *CLS command, or when power is applied to the
oscilloscope.
Execution Error Status Register (EXR)
EXR contains the code of the last execution error detected by the oscilloscope. List these error codes
with EXR?.
Read the register, again using the EXR? query. The response is the error code. Clear with another EXR?
or with ALST?, a *CLS command, or when power is applied to the oscilloscope.
920836 Rev B
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