Agilent Technologies N1022A Manuel d'utilisateur télécharger pdf (Page 18)

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High-Frequency Active Single-Ended Voltage Probes

Agilent 1156A/57A/58A High-Bandwidth, Active Single-Ended Voltage

• Ideal for a range of hi-speed

applications

• 88 ps rise time (on 4 GHz model)

• 100 kΩ, 0.8 pF, non-resonant

input impedance

• 5 V peak-to-peak dynamic range

• ± 15 V offset

• Accessories designed for

minimal device loading and

optimal response

• Small size for easier probing

As the speeds in your design

increase, you may notice more

overshoot, ringing, and other per-

turbations when connecting an

oscilloscope probe. Probes form a

resonant circuit where they con-

nect to the device. If this reso-

nance is within the bandwidth of

the oscilloscope probe you are

using, it will be difficult to deter-

mine if the measured perturba-

tions are due to your circuit or

the probe.

These probes are compatible with

the AutoProbe interface, which

completely configures the oscillo-

scope for use with the probe.

Power for the active probe is sup-

plied by the oscilloscope.

Faithful Reproduction of Your Signal

Now you can accurately measure

your hi-speed signals without

introducing errors from a probe

that has a resonant input imped-

ance or non-flat frequency

response. With the 1156A/57A/58A

probes, a damping resistor is

placed as close as possible to the

point being probed, which keeps

the input impedance from res-

onating low, and it also allows a

flat frequency response across

the entire bandwidth of the probe.

Finally, there is a high-bandwidth

active probe where the waveform

onscreen matches the waveform

at the probe tip. The 1158A offers

a flat response for the entire

bandwidth of a 4 GHz probe!

Small Size

Have you experienced problems

with large, clunky probes? If so,

you probably found your probe

awkward to hold and had diffi-

culty connecting to your signals.

With the small size of the

1156A/57A/58A, you can handle

the probe expertly and gain

access to tight spaces. Plus, the

low mass makes the probe more

durable. Agilent makes your job

easier–giving you performance

that is easy to use.

Superior Accessories

Your device under test (DUT)

determines the type of probing

accessories you need. Of course,

there are electrical trade-offs

depending on the type of connec-

tion you use. Longer connections

from your DUT produce lower

performance probing systems.

Figure 3.9. Agilent 1156A/57A/58A active probe for hi-speed signals.

Figure 3.10. Probe with resistive signal pin

and ground blade.

Agilent offers a variety of acces-

sories optimized to give you the

most accurate reproduction of

your signal. In addition, the per-

formance of each accessory is

characterized for you. Now you

can make informed decisions and

get the best measurement for

your environment. Superior per-

formance combined with the

knowledge to use it–that’s how

Agilent helps you do your job better.

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