Agilent 1156/7/8A Active Probes
for Infiniium Oscilloscopes
Product Overview
Features
• 4 GHz, 2.5 GHz, and 1.5 GHz bandwidth
models
• Small size makes probing easier
• 88 ps rise time (on 4 GHz model)
• 100 kΩ, 0.8 pF, non-resonant input
impedance
• ±15 V offset
• 5 V peak-to-peak dynamic range
• Accessories designed for minimal loading
on your device and optimum response
• Compatible with the Infiniium AutoProbe
Interface
As the speeds in your design
increase, you may notice more overshoot, ringing, and other perturbations when connecting an oscilloscope probe. Probes form a resonant
circuit where they connect to the
device. If this resonance is within the
bandwidth of the oscilloscope probe
you are using, it will be difficult to
determine if the measured perturbations are due to your circuit or the
probe.
Agilent is the only company that
has overcome the resonance formed
by the connection of a probe to a
device. The Agilent 1156/7/8A
probes optimize performance to
make your job easier:
•High input impedance of 100 kΩ
and 0.8 pF that never resonates
low
•Flat frequency response across the
entire bandwidth of the probe
•A full 5 V peak-to-peak dynamic
range, and
•±15 V of offset.
Combined with the Agilent 54846A
Infiniium scope, the 1158A 4 GHz
probe offers you a full 2.25 GHz
of system bandwidth, giving you
accurate insight into your high-speed
devices.
Agilent 1156/7/8A active probe with accessories
Agilent 1156/7/8A active probe with resistive signal pin and ground blade
2
Vin and Vout when driven from a 25Ω source
Response = Vout/Vin
Notice how closely the output matches the input The flat response means the waveform on the scope screen will match
the waveform at the probe tip - across the entire 4 GHz bandwidth.
Small Size
Have you experienced problems with
large, clunky probes? If so, you
probably found your probe awkward
to hold and had difficulty connecting
to your signals. With the 1156/7/8A’s
small size 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.
Faithful Reproduction of
Your Signal
Now you can accurately measure
your high-speed signals without
introducing errors from a probe that
has a resonant input impedance or
non-flat frequency response.
Resistance is placed as close as possible to the point being probed, which
keeps the input impedance from resonating 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 on screen
matches the waveform at the probe
tip. No other probe currently on the
market offers a flat response for the
entire bandwidth of a 4 GHz probe!
With the wide dynamic range and
±15 V of offset, the probe can be used
in a wide variety of applications.
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
connection you use. Longer connections from your DUT produce lower
performance probing systems.
Agilent offers a variety of accessories optimized to give you the most
accurate reproduction of your signal. In addition, the performance of each
accessory is characterized for you. Now you can make informed decisions
and get the best measurement for your environment. Superior performance
combined with the knowledge to use it - that's how Agilent helps you do
your job better.
This suite of accessories is properly damped to give you a flat transmitted
response and non-resonant input impedance. Use these supplied accessories
to get the best performance from your probe:
• Resistive signal pin (orange) E2640A
• Solderable-tip 5 cm resistive signal lead E2638A
• Socket-end 5 cm resistive signal lead 01156-82105
• Socket-end 10 cm resistive signal lead 01156-82108
• Ground blade assembly E2641A
• Solderable SMT ground pin 1253-5054
• Solderable through-hole ground pin 1252-7150
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