Agilent Technologies InfiniiVision 4000 X-Series, Programmer'S Manual

Page: 1185 / 1352

Status Reporting
38
Agilent InfiniiVision 4000 X-Series Oscilloscopes Programmer's Guide 1185
(Standard) Event Status Register (ESR)
The (Standard) Event Status Register (ESR) monitors the following
oscilloscope status events:
• PON - Power On
• URQ - User Request
• CME - Command Error
• EXE - Execution Error
• DDE - Device Dependent Error
• QYE - Query Error
• RQC - Request Control
• OPC - Operation Complete
When one of these events occur, the event sets the corresponding bit in
the register. If the bits are enabled in the Standard Event Status Enable
Register, the bits set in this register generate a summary bit to set bit 5
(ESB) in the Status Byte Register.
You can read the contents of the Standard Event Status Register and clear
the register by sending the *ESR? query. The value returned is the total
bit weights of all of the bits that are set at the present time.
Example The following example uses the *ESR query to read the contents of the
Standard Event Status Register.
myScope.WriteString "*ESR?"
varQueryResult = myScope.ReadNumber
MsgBox "Standard Event Status Register: 0x" + Hex(varQueryResult)
If bit 4 (weight = 16) and bit 5 (weight = 32) are set, the program prints
the sum of the two weights.