Keysight N2804/5A
Differential Probes
User’s Guide
Notices
CAUTION
WARNING
© Keysight Technologies, 2014, 2017
No part of this manual may be reproduced in
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a foreign language) without prior agreement
and written consent from Keysight Technologies, Inc. as governed by United States and
international copyright laws.
Manual Part Number
N2804-97001
Second Edition, February 2017
Published in USA
Published by:
Keysight Technologies, Inc.
1400 Fountaingrove Parkway
Santa Rosa, CA, 95403
Warranty
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changed, without notice, in future editions.
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Department of Defense FAR Supplement
("DFARS") 227.7202, the U.S. government acquires commercial computer
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Safety Notices
A CAUTION notice denotes a hazard. It
calls attention to an operating procedure, practice, or the like that, if not
correctly performed or adhered to, could
result in damage to the product or loss
of important data. Do not proceed
beyond a CAUTION notice until the indicated conditions are fully understood
and met.
A WARNING notice denotes a hazard. It
calls attention to an operating procedure, practice, or the like that, if not
correctly performed or adhered to,
could result in personal injury or death.
Do not proceed beyond a WARNING
notice until the indicated conditions
are fully understood and met.
2 N2804/5A Differential Probes User’s Guide
Contents
Introduction / 5
Inspecting the Probe / 6
Handling the Probe / 7
Oscilloscope Compatibility / 8
Channel Identification Rings / 9
To Clean the Probe / 9
N2804A Probe and Accessories / 10
N2805A Probe and Accessories / 12
Attaching Probe Accessories / 14
Probe Offset Adjustment / 15
Safety Information / 17
Specifications and Characteristics / 20
N2804A Performance Plots / 23
N2805A Performance Plots / 27
Performance Verification / 31
Performance Tests / 32
Performance Test Record / 34
IEC Measurement Category Definitions / 35
Measurement Category I (CAT I) / 35
Measurement Category II (CAT II) / 35
Measurement Category III (CAT III) / 35
Measurement Category IV (CAT IV) / 35
Returning the Probe for Service / 36
Contacting Keysight Technologies / 37
N2804/5A Differential Probes User’s Guide 3
Contents
Index
4 N2804/5A Differential Probes User’s Guide
Introduction
Keysight N2804/5A Differential Probes
User’s Guide
The N2804A and N2805A differential probes provide superior general-purpose
differential signal measurements that are required for high-speed power
measurements, vehicle bus measurements, and high-speed digital system
designs. Both probes are powered by the oscilloscope’s AutoProbe interface. Both
probes are designed for Measurement Category II (CAT II) as described in “IEC
Measurement Category Definitions" on page 35.
The N2804A 300 MHz differential probe offers 100:1 attenuation ratio, allowing it
to be used for high voltage signal measurements. The differential probe has an
differential input resistance of 4 MW and low input capacitance of 4 pF to minimize
circuit loading. The probe comes with a pair of extension leads (30 cm long) with a
damping resistor built in to damp out the in-band resonance and provide flat
frequency response even with the extension leads and the probe tip accessories
used.
The N2805A 200 MHz differential probe is designed to provide superior differential
signal measurements especially in environments where extended cable length is
required. This is due to the probe’s 5m long cable length.
Table 1 Quick Probe Comparison
Bandwidth 300 MHz 200 MHz
Attenuation Ratio 100:1 50:1
Differential Input Loading 4 M
Maximum Differential Input \300V (DC + peak AC) and ±200 V
Probe Cable Length 1.2 m 5 m
* Refer to “Specifications and Characteristics" on page 20 for the complete specifications.
*
N2804A N2805A
W ǁ 4 pF 4 MW ǁ 4 pF
rms
\100V (DC + peak AC) and ±100 V
rms
5
Introduction
Inspecting the Probe
Figure 1 Probes (Accessories Not Shown)
• Inspect the shipping container for damage. Keep the 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.
• If the contents are incomplete or damaged, notify your Keysight Technologies
Sales Office.
• Inspect the probe. If there is mechanical damage or defect, or if the probe does
not operate properly or pass calibration tests, notify your Keysight Technologies
Sales Office.
If the shipping container is damaged, or the cushioning materials show signs of
stress, notify the carrier as well as your Keysight Technologies Sales Office. Keep
the shipping materials for the carrier’s inspection. The Keysight Technologies
office will arrange for repair or replacement at Keysight Technologies’ option
without waiting for claim settlement.
6 N2804/5A Differential Probes User’s Guide
Handling the Probe
CAUTION
CAUTION
Handle the probe with care and refer to the safety notices in this manual. The
probe cable is a sensitive part of the probe and, therefore, you should be careful
not to damage it through excessive bending or pulling. You should also avoid any
mechanical shocks to this product in order to guarantee accurate performance
and protection.
Always wear an ESD wrist strap when working with active probes. Not doing so can result
in the probe becoming permanently damaged.
Observe all of the product limits noted on the products labels and listed in “Safety
Information" on page 17 and “Specifications and Characteristics" on page 20.
Introduction
N2804/5A Differential Probes User’s Guide 7
Figure 2 N2805A Product Labels
Figure 3 N2804A Product Labels
Introduction
NOTE
NOTE
Oscilloscope Compatibility
The N2804A and N2805A probes are compatible with the Keysight oscilloscopes
shown in Tab le 2. Up to four probes can be connected to the oscilloscope at the
same time. The table also lists the minimum required firmware version for the
oscilloscope.
Is Your Oscilloscope Software Up-to-Date? Keysight periodically releases software updates to
support your probe, fix known defects, and incorporate product enhancements. To download
the latest firmware, go to www.keysight.com, locate the Technical Support page, and search
by your oscilloscope model number.
The N2804A and N2805A probes are designed for oscilloscopes with 50W
AutoProbe-interface channel inputs. The AutoProbe interface provides the power to the probe.
Table 2 Compatible Oscilloscopes and Support
Required
Oscilloscope
Infiniium Oscilloscopes
Firmware Version Adapter Required
90000 Q-Series ¡ 5.20 N5442A
90000 X-Series ¡ 5.20 N5442A
90000A ¡ 5.20 —
9000A/H-Series ¡ 5.20 —
S-Series ¡ 5.20 —
InfiniiVision Oscilloscopes
4000 X-Series ¡ 4.00 —
3000 X-Series ¡ 2.38 —
8 N2804/5A Differential Probes User’s Guide
Channel Identification Rings
When multiple probes are connected to the oscilloscope, use the channel
identification rings to associate the channel inputs with each probe. Place one
colored ring near the probe’s channel connector and place an identical color ring
near the probe head. The channel identifications rings are shown in “N2804A in
Case" on page 10 and “N2805A in Case" on page 12.
To Clean the Probe
Disconnect the probe from the oscilloscope and clean the probe with a soft cloth
dampened with a mild soap and water solution. Make sure that the probe is
completely dry before reconnecting it to an oscilloscope. Avoid using abrasive
cleaners and chemicals containing benzene or similar solvents.
Introduction
N2804/5A Differential Probes User’s Guide 9
N2804A Probe and Accessories
WARNING
N2804A Probe and Accessories
Figure 4 shows the N2804A probe with accessories in the product case. A
description of each accessory is provided in Table 3 on page 11. These accessories
are not compatible with N2805A probes. Replacements can be ordered with the
N2816A replacement kit. The quantity for each accessory in the kit is the same as
listed in the table and originally provided with the probe.
For IEC Category definitions, refer to “IEC Measurement Category Definitions" on
page 35.
The measurement category of a combination of a PROBE ASSEMBLY and an accessory is
the lower of the measurement categories of the PROBE ASSEMBLY and of the
accessory.
10 N2804/5A Differential Probes User’s Guide
Figure 4 N2804A in Case
N2804A Probe and Accessories
Table 3 N2804A Accessories Supplied With Probe (Order N2816A for Replacement Accessories)
Accessory Description
Alligator Clips (1 red and 1 black)
Rating: 600V, 10A (CAT III)
BW: 300 MHz
Pincer Clips (1 red and 1 black)
Rating: 300V, 1A (CAT II)
BW: 300 MHz
Extension Leads (1 red and 1 black)
Approximately 30 cm length
BW: 120 MHz
Probe Offset Adjustment Tool (Qty. 1)
N2804/5A Differential Probes User’s Guide 11
N2805A Probe and Accessories
WARNING
N2805A Probe and Accessories
Figure 5 shows the N2805A probe with accessories in the product case. A
description of each accessory is provided in Table 4 on page 13. These accessories
are not compatible with N2804A probes. Replacements can be ordered with the
N2817A replacement kit. The quantity for each accessory in the kit is the same as
listed in the table and originally provided with the probe.
For IEC Category definitions, refer to “IEC Measurement Category Definitions" on
page 35.
The measurement category of a combination of a PROBE ASSEMBLY and an accessory is
the lower of the measurement categories of the PROBE ASSEMBLY and of the
accessory.
12 N2804/5A Differential Probes User’s Guide
Figure 5 N2805A in Case
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