Agilent Technologies InfiniiVision 5000 Series Guida Utente Pagina 99

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Triggering the Oscilloscope 3
5000 Series Oscilloscope User’s Guide 99
Input Impedance The external trigger input impedance can be
set to either 1M Ohm or 50 Ohm by pressing the Imped softkey.
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 1.015 k.
Input Voltage The input voltage sensitivity is 500 mV, from DC
to 100 MHz. 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
Maximum input voltage for external trigger (4-channel oscilloscopes)
Do not exceed 15 Vrms at rear panel External Trigger input or damage
to the oscilloscope may occur.
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