Agilent Technologies MSO6102A Programmer's Reference Manual page 617

VisaComError:
End Sub
'
' Capture
' -------------------------------------------------------------------
' We will capture the waveform using the digitize command.
' -------------------------------------------------------------------
Private Sub Capture()
Agilent 6000 Series Oscilloscopes Programmer's Reference
MsgBox "VISA COM Error:" + vbCrLf + Err.Description
On Error GoTo VisaComError
' AQUIRE_TYPE - Sets the acquisition mode, which can be NORMAL,
' PEAK, or AVERAGE.
myScope.WriteString ":ACQUIRE:TYPE NORMAL"
' AQUIRE_COMPLETE - Specifies the minimum completion criteria for
' an acquisition. The parameter determines the percentage of time
' buckets needed to be "full" before an acquisition is considered
' to be complete.
myScope.WriteString ":ACQUIRE:COMPLETE 100"
' DIGITIZE - Used to acquire the waveform data for transfer over
' the interface. Sending this command causes an acquisition to
' take place with the resulting data being placed in the buffer.
'
' NOTE! The DIGITIZE command is highly recommended for triggering
' modes other than SINGLE.
' available for measurement.
' the completion criteria may never be met.
' gathered in Single mode is related to the sweep speed, memory
' depth, and maximum sample rate.
' with a 1000-point memory, a sweep speed of 10 us/div (100 us
' total time across the screen), and a 20 MSa/s maximum sample rate.
' 1000 divided by 100 us equals 10 MSa/s.
' less than or equal to the maximum sample rate, the full 1000 points
' will be digitized in a single acquisition.
' (10 us across the screen).
' because this is greater than the maximum sample rate by 5 times,
' only 400 points (or 1/5 the points) can be gathered on a single
' trigger. Keep in mind when the oscilloscope is running,
' communication with the computer interrupts data acquisition.
' Setting up the oscilloscope over the bus causes the data buffers
' to be cleared and internal hardware to be reconfigured.
' measurement is immediately requested, there may have not been
' enough time for the data acquisition process to collect data,
' and the results may not be accurate.
' may be returned over the bus in this situation.
'
myScope.WriteString ":DIGITIZE CHAN1"
Exit Sub
This ensures that sufficient data is
If DIGITIZE is used with single mode,
The number of points
For example, take an oscilloscope
Because this number is
Now, use 1 us/div
1000 divided by 10 us equals 100 MSa/s;
An error value of 9.9E+37
Programming Examples
If a
617
9