User’s Guide
Publication number N2772-92001
March 2000
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For Safety information, Warranties, Regulatory information, and publishing information,
see the pages at the back of this book.
© Copyright Agilent Technologies 1999-2000
All Rights Rese rved.
N2772A Differential Voltage Probe
Contents
Inspect the Probe 3
Compatibility 4
Probe Parts Supplied 5
Characteristics and Specifications 6
Electrical Characteristics 6
Input Characteristics 7
Output Characteristics 7
Environmental Specifications 7
Safety Specifications 8
Using the N2772A Probe 10
Powering the N2772A 10
External Power Supply 10
Install or Replace the Battery 11
Oscilloscope Input Characteristic 11
Select the Correct Attenuation 12
Measurement Tips 12
Calibration 13
Cleaning the Probe 13
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N2772A Differential Voltage Probe
Inspect the Probe
Inspect the Probe
❏ Inspect the shipping container for damage.
Keep a damaged shipping container or cushioning material until the contents of
the shipment have been checked for completeness and the probe has been
checked mechanically and electrically.
❏ Check the accessories.
Any accessories that were supplied with the probe are listed in “Probe Parts
Supplied” this manual.
• If the contents are incomplete or damaged, notify your Agilent Technologies
Sales Office.
❏ Inspect the instrument.
• If there is mechanical damage or defect, or if the probe does not operate
properly or pass performance tests, notify your Agilent Technologies Sales
Office.
• If the shipping container is damaged, or the cushioning materials show signs
of stress, notify the carrier as well as your Agilent Technologies Sales Office.
Keep the shipping materials for the carrier’s inspection. The Agilent
Technologies office will arrange for repair or replacement at Agilent
Technologies’ option without waiting for claim settlement.
3
N2772A Differential Voltage Probe
Inspect the Probe
N2772A Differential Voltage Probes
The N2772A differential probe allows you to safely measure floating circuits, as
high as 600V dc peak to ground, with the oscilloscope grounded. It is ideal for
many applications such as motor speed controls, power supply designs and
electronic high-power converters.
With 20 MHz bandwidth, switchable attenuation of 20:1 and 200:1, and a
maximum voltage input of 600V, it provides the versatility for a broad range of
applications including high-voltage circuits.
Each probe comes with sharp probe tips for use on small components and in tight
places and alligator clips for connecting to larger cables.
The probe is powered by a 9V battery or by using a separate power supply, the
N2773A.
Compatibility
The N2772A differential probe is compatible with any oscilloscope that has the
following features:
• 1 M input impedance
Ω
• Can display 30V peak input
• Has BNC input
4
N2772A Differential Voltage Probe
Inspect the Probe
Probe Parts Supplied
The following diagram and table show the parts supplied with the N2772A Probe.
3,
1
Parts fo r N 2772A Probe
Item Description
1 Differential voltage probe
2 Probe tips
3 Banana jack alliga tor - black
4 Banana jack alligator - red
2
2, 3
5
N2772A Differential Voltage Probe
Characteristics and Specifications
Characteristics and Specifications
Characteristics and specifications for the N2772A Differential Voltage Probe are
shown below.
Electrical Characteristics
Attenuation ratios 20:1 and 200:1 (Selectable via switch on probe.)
Bandwidt h (into 1 M , 50 pF) 20 MHz
Accuracy 2.5% into 1 M
Rise Time 200x: 17.5 ns
High CMRR 80 dB @ 60Hz, 50 dB @ 1 MHz
Input im pedence Between inputs: 10 M , 5 pF
Output im pedence 50
Noise 200x: <2 mVrms
Offset <=10 mV into 1 M
Switch positions OFF, 200x, 20x
External power Via power adapter N2773A (optional)
Internal power Battery power: Alkaline 9V, IEC6LR61
Power indicators Green LED: ON at normal operation. Blinks at
Auto stan d by After 30 minutes, only when battery operated.
*Battery life measured @ 25 C with Duracell® akaline battery. (Delivered with probe.)
Ω
±Ω
20x: 17.5 ns
Ω
Ω
20x: <3 mVrms
Ω
Battery life: 8 hour operation, 400 hour in auto
standby*
standby.
Red LED: ON when battery needs to be replaced.
°
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