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Auto Scale finds, turns on, and scales any channel with a repetitive
waveform that has a frequency of at least 25 Hz, a duty cycle greater than
0.5%, and an amplitude of at least 10 mV peak- to- peak. Any channels
where no signal is found are turned off.
The trigger source is selected by looking for the first valid waveform
starting with external trigger, then continuing with the lowest number
analog channel up to the highest number analog channel, and finally (if
digital probes are connected) the highest number digital channel.
During Auto Scale, the delay is set to 0.0 seconds, the horizontal time/div
(sweep speed) setting is a function of the input signal (about 2 periods of
the triggered signal on the screen), and the triggering mode is set to Edge.
Compensate Passive Probes
Each oscilloscope passive probe must be compensated to match the input
characteristics of the oscilloscope channel to which it is connected. A
poorly compensated probe can introduce significant measurement errors.
1 Input the Probe Comp signal (see
2 Press [Default Setup] to recall the default oscilloscope setup (see
3 Press [Auto Scale] to automatically configure the oscilloscope for the
4 Press the channel key to which the probe is connected ([1], [2], etc.).
5 In the Channel Menu, press Probe.
6 In the Channel Probe Menu, press Probe Check; then, follow the
Agilent InfiniiVision 4000 X-Series Oscilloscopes User's Guide
the Default Oscilloscope Setup"
Probe Comp signal (see
instructions on- screen.
If necessary, use a nonmetallic tool (supplied with the probe) to adjust
the trimmer capacitor on the probe for the flattest pulse possible.
On the N2862/63/90 probes, the trimmer capacitor is the yellow
adjustment on the probe tip. On other probes, the trimmer capacitor is
located on the probe BNC connector.
"Input a Waveform"
on page 35).
"Use Auto Scale"
on page 35).
1
Getting Started
on page 34).
"Recall
37
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