Getting Started 1
InfiniiVision 7000B Series Oscilloscopes User’s Guide 33
If you do not see the waveform, ensure your power source is adequate, the
oscilloscope is powered- on, the power cord is firmly inserted into the
oscilloscope receptacle, and the probe is connected securely to the
front- panel oscilloscope channel input BNC and to the Probe Comp
terminal.
How AutoScale works
AutoScale analyzes any waveforms present at each channel and at the
external trigger input. This includes the digital channels on MSO models.
AutoScale finds, turns on, and scales any channel with a repetitive
waveform that has a frequency of at least 50 Hz, a duty cycle greater than
0.5%, and an amplitude of at least 10 mV peak- to- peak. Any channels that
do not meet these requirements are turned off.
The trigger source is selected by looking for the first valid waveform
starting with external trigger, then continuing with the highest number
analog channel down to the lowest number analog channel, and finally (if
the oscilloscope is an MSO) the highest number digital channel.
During AutoScale, the delay is set to 0.0 seconds, the 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. Vectors remain in the
state they were before the AutoScale.
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