Agilent Technologies N2780B Manual de usuario descargar pdf (Pagina 3)

Types of probes

Passive probes

The most widely used type of oscil-

loscope probe is the “passive probe.”

Passive probes are also the most

rugged and economical. There are no

active components such as transistors

or amplifiers in the probe, and therefore

passive probes do not need to be

powered.

Passive probes classifications

1:1 high Z

passive probe

10:1 or 20:1 high Z

passive probe

100:1 or 1000:1 high Z

passive probe

Resistive divider

passive probe

Features A low capacitance

coax cable with a BNC

connector on one end

and a probe on the other

• The most widely used

scope probe type;

provided standard

with most < 1-GHz

oscilloscopes

• Gives lower input

capacitance and higher

bandwidth than the 1:1

probe

• Additional attenuation

for use with higher-

amplitude signals

• Large attenuation

requires a high-gain

amplifier on the scope

• Highest-bandwidth

passive probe for

measuring high-

frequency, low-

impedance circuit

• Must be used with an

oscilloscope’s 50-Ω input

When to use For viewing small

signals (< 1 V)

For viewing up to ~300 V For viewing up to

15 kV high voltage

High-frequency,

low-impedance (< 50 Ω)

digital circuit, transmission

line

When not to use For probing high-

frequency signal

For achieving > 600 MHz

system bandwidth

For making floating

(ungrounded)

measurement

For probing high-amplitude,

high-impedance signal

Typical bandwidth Up to 35 MHz Up to 600 MHz Up to 250 MHz Up to 6 GHz

Agilent models N2870A,10070D,

N2889A (1:1/10:1)

N2871/2/3/5A

10073D, 10074D, 1165A,

N2862B/63B/89A/90A

10076B, N2771B N2874/6A, 54006A

1 2 3 4 5 6 7 8 ... 16 17

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