136 6000 Series Oscilloscope User’s Guide
4 Triggering the 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 1M Ohm or
50 Ohm by pressing the Imped softkey. The input impedance of
100 MHz bandwidth models is fixed at 1M Ω.
• 50 Ohm mode matches 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.
• 1M Ohm mode is for use with many passive probes and for
general-purpose measurements. The higher impedance
minimizes the loading effect of the oscilloscope on the circuit
under test.
Probe Units Press the Units softkey to select the proper
measurement unit for the connected probe. Select Volts for a
voltage probe and select Amps for a current probe. Measurement
results, channel sensitivity, and trigger level will reflect the
measurement units you have selected.
4-Channel oscilloscope External Trigger input
Input Impedance The external trigger input impedance for the
4-channel oscilloscope is approximately 2.14 kΩ (
~
1.015 kΩ on
100 MHz bandwidth models).
Input Voltage The input voltage sensitivity is 500 mV, from DC
to 500 MHz (DC to 100 MHz on 100 MHz bandwidth models).
The input voltage range is ±15 V.
There are no range or units settings for the External Trigger
input of the 4-channel oscilloscope.
CAUTION
Do not exceed 15 Vrms at rear panel External Trigger input or damage
to the oscilloscope may occur.
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