Triggering the Oscilloscope 4
6000 Series Oscilloscope User’s Guide 137
When you connect an AutoProbe self-sensing probe, the
oscilloscope will automatically configure your probe to the
correct attenuation factor. Note that the AutoProbe feature is
not available on 100 MHz bandwidth models.
The probe correction factor must be set properly for
measurements to be made correctly.
Range The input voltage range can be set to 1.0 Volts or 8.0
Volts. When in current mode, the range is fixed at 1.0 Amps.
Range is automatically scaled according to the probe’s
attenuation factor.
Maximum input voltage for the external trigger input of the
2-channel oscilloscope:
Input Impedance The 300 MHz, 500 MHz, and 1 GHz bandwidth
2-channel oscilloscopes have selectable external trigger input
impedance. The impedance can be set to either 1MOhm or
50Ohm by pressing the Imped softkey. The input impedance of
100 MHz bandwidth models is fixed at 1M .
50Ohm mode mat ches 50-ohm cables commonly used in
making high frequency measurements. This impedance
matching gives you the most accurate measurements since
reflections are minimized along the signal path.
CAUTION Maximum input voltage for external trigger (2-channel oscilloscopes)
CAT I 300 Vrms, 400 Vpk; transient overvoltage 1.6 kVpk
CAT II 100 Vrms, 400 Vpk
with 10073C or 10074C 10:1 probe: CAT I 500 Vpk, CAT II 400 Vpk
CAUTION Do not exceed 5 Vrms in 50 mode. Input protection is enabled in
50 mode and the 50 load will disconnect if greater than 5 Vrms is
detected. However the input could still be damaged, depending on the
time constant of the signal. The 50 input protection mode only
functions when the oscilloscope is powered on.