8588A/8558A
Operators Manual
3) Capture 4096 samples of a 1 Vrms, 4 kHz wave form with a 5 μs acquisition
Push .
If not already in voltage mode, push (V or
I) to select Voltage.
Push (Range) and select the 1 V range.
Push (Measure Setup) and set a 5 µs
aperture and a low pass filter if required. When
done, push to return to the main Digitize
menu.
Push (Coupling, Zin) and select the
required input coupling and impedance.
Connect the signal to be sampled to the active
input terminals.
Push .
Push to reset the Trigger subsystem to the
default settings
Push to set the Trigger Event to External
in the Trigger Setup menu.
46
period and at a rate controlled by an external 10 kHz trigger wave form. See
Table 12.
Table 12. Digitize Example 3
Action
Comment
Aborts the current trigger cycle. Trigger
subsystem placed in INIT:CONT OFF
Aperture selection is a compromise between
noise and bandwidth. The input signal is
averaged during the sample time. If the
magnitude of the signal changes during the
aperture a magnitude error will result. While noise
increases as aperture decreases, magnitude error
decreases. The Aperture time should be less than
the sample period to avoid a/d acquisition errors.
For voltage ranges 10 V or less, use DC, Auto.
For the 100 V and 1000 V ranges, use DC, 1M for
best performance.
This provides time for the signal conditioning
circuits to stabilize.
The default settings pertinent to this example are
ARM2:SOURce IMM
ARM2:COUNT 1
ARM2:ECOUNT 1
ARM1:SOURce IMM
ARM1:COUNT 1
ARM1:ECOUNT 1