Agilent Technologies Infiniium 90000 Q-Series, Programmer'S Manual

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250 Agilent Infiniium 90000 Series Oscilloscopes Programmer's Reference
13
Common Commands
*ESR?
(Event Status Register)
Query
*ESR?
The *ESR? query returns the contents of the Standard Event Status
Register. Reading this register clears the Standard Event Status Register,
as does a *CLS.
Returned Format
<status><NL>
<status>
An integer, 0 to 255, representing the total bit weights of all bits that are
high at the time you read the register.
Example
This example places the current contents of the Standard Event Status
Register in the numeric variable, varEvent, then prints the value of the
variable to the computer's screen.
myScope.WriteString "*ESR?"
varEvent = myScope.ReadNumber
Debug.Print FormatNumber(varEvent, 0)
Table 18 lists each bit in the Event Status Register and the corresponding
bit weights.
Table 18 Standard Event Status Register Bits
Bit Bit
Weight Bit Name Condition (0 = False = Low, 1 =
True = High)
7 128 PON 1 = OFF to ON transition has
occurred.
6 64 Not Used. Permanently set to zero.
5 32 CME 0 = no command errors. 1 = a
command error has been detected.
4 16 EXE 0 = no execution error. 1 = an
execution error has been detected.
3 8 DDE 0 = no device-dependent errors. 1
= a device-dependent error has
been detected.
2 4 QYE 0 = no query errors. 1 = a query
error has been detected.
1 2 RQC 0 = request control - NOT used -
always 0.
0 1 OPC 0 = operation is not complete. 1 =
operation is complete.