Keysight 41800A Quick start guide

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Keysight 41800A Active Probe
Operation Note
Keysight 41800A Active Probe
*KEYSIGHT
TECHNOLOGIES Operation Note
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NOTICE: This document contains references to Agilent
Tech nol ogi es. Agilent's former Test and Measurement
business has become Keysight Technologies. For more
information, go to www.keysight.com.
1ii k G KEYSI TECHNOLOGIESH T
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Caution
The 41800A is sensitive to electrostatic discharge (ESD). The
followings must be adhered to when using the 41800A.
•Do NOT touch the pin of the probe.
•Eliminate ESD on your body.
•Eliminate ESD on the work surface.
•Hold the probe by the protective sleeve.
•Do NOT introduce ESD into the DUT while the probe is in
use.
41800A
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MANUAL CHANGES
Agilent 41800A
Active Probe
Operation Note
MANUAL IDENTIFICATION
Model Number: Agilent 41800A
Date Printed: December 1999
Part Number: 41800-90010
This supplement contains information for correcting manual errors and for adapting the manual to newer instruments that contains
improvements or modifications not documented in the existing manual.
To use this supplement
1. Make all ERRATA corrections
2. Make all appropriate serial-number-related changes listed below
SERIAL PREFIX OR NUMBER MAKE MANUAL
CHANGES
All 1, 2
New Item
SERIAL PREFIX OR NUMBER MAKE MANUAL
CHANGES
ERRATA


CHANGES 1

CHANGE 1 contains the information needed to adapt the 41800A’s manual.
Page 1-5 Table 1-3. Specifications (2 of 3)
Change the ‘Maximum Allowable Input (DC+AC):’ as follows.
Maximum Allowable Input:
AC+DC:±40 V (probe alone and probe with divider)
AC:0.5Vrms(probealone)
AC:0.5Vrms(with1:1divider)
AC:5Vrms(with10:1divider)
AC:30Vrms(with100:1divider)
NOTE
Manual change supplement are revised as often as necessary to keep manuals as current and accurate as possible. Agilent Technologies
recommends that you periodically request the latest edition of this supplement. Free copies are available from all Agilent Technologies offices.
When requesting copies, quote the manual identification information from your supplement, or the model number and print date from the title
page of the manual.
Date/Div: September,2012/WN
Page 1 of 2
PRINTED IN MALAYSIA
MANUAL CHANGES
Agilent 41800A
Active Probe
Operation Note
MANUAL IDENTIFICATION
Model Number: Agilent 41800A
Date Printed: December 1999
Part Number: 41800-90010
This supplement contains information for correcting manual errors and for adapting the manual to newer instruments that contains
improvements or modifications not documented in the existing manual.
To use this supplement
1. Make all ERRATA corrections
2. Make all appropriate serial-number-related changes listed below
SERIAL PREFIX OR NUMBER MAKE MANUAL
CHANGES
All 1, 2
♦New Item
ERRATA
SERIAL PREFIX OR NUMBER MAKE MANUAL
CHANGES
CHANGES 1
CHANGE 1 contains the information needed to adapt the 41800A's manual.
Page 1-5 Table 1-3. Specifications (2 of 3)
Change the 'Maximum Allowable Input (DC+AC):' as follows.
Maximum Allowable Input:
AC+DC: ±40 V (probe alone and probe with divider)
AC: 0.5Vrms (probe alone)
AC: 0.5Vrms (with 1:1 divider)
AC: 5Vrms (with 10:1 divider)
AC: 30Vrms (with 100:1 divider)
NOTE
Manual change supplement are revised as often as necessary to keep manuals as current and accurate as possible. Agilent Technologies
recommends that you periodically request the latest edition of this supplement. Free copies are available from all Agilent Technologies offices.
When requesting copies, quote the manual identification information from your supplement, or the model number and print date from the title
page of the manual.
Date/Div: September,2012/WN
Page 1 of 2
PRINTED IN MALAYSIA
Agilent Technologies
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Change 2
CHANGE 2 contains the information needed when the external DC power supply adapter cable (Agilent part
number: 87405-20012) is used with the 41800A.
Description
When using the 41800A with the instrument that does not supply probe power, you can use the external power supply and
the cable (Agilent part number: 87405-20012) to supply a power to the active probe. The cable is furnished with the 41800A
when the option 41800A-001 is ordered.
Required power supply
One of the following Agilent external power supplies needs to be used.
E3620A, E3630A, E3631A
Cable connection
The user needs to ensure the correct cable connection as shown below.
Green plug of the cable - Green terminal of the power supply
Red plug of the cable - Red terminal of the power supply
Black plug of the cable - Black terminal of the power supply
Power level setting
The user needs to ensure the correct power level setting of the power supply (+15 V and -12.6 V) per attached labels on the
cable. Power requirements of the 41800A are as follows.
Green: Ground
Red: +15 V ±5 %
Black: -12.6 V ±20 %
Warning Failure to comply with the descriptions in “Required power supply,” “Cable connection,” and “Power level
setting” section may cause overheating or smoking of the 41800A. Agilent Technologies, Inc. assumes no
liability for customer’s failure to comply with these requirements.
Change 2
CHANGE 2 contains the information needed when the external DC power supply adapter cable (Agilent part
number: 87405-20012) is used with the 41800A.
Description
When using the 41800A with the instrument that does not supply probe power, you can use the external power supply and
the cable (Agilent part number: 87405-20012) to supply a power to the active probe. The cable is furnished with the 41800A
when the option 41800A-001 is ordered.
Required power supply
One of the following Agilent external power supplies needs to be used.
E3620A, E3630A, E363 lA
Cable connection
The user needs to ensure the correct cable connection as shown below.
•Green plug of the cable - Green terminal of the power supply
•Red plug of the cable - Red terminal of the power supply
•Black plug of the cable - Black terminal of the power supply
Power level setting
The user needs to ensure the correct power level setting of the power supply (+15 V and -12.6 V) per attached labels on the
cable. Power requirements of the 41800A are as follows.
•Green: Ground
•Red: +15 V ± 5 %
•Black: -12.6 V ±20 %
Warning Failure to comply with the descriptions in "Required power supply," "Cable connection," and "Power level
setting" section may cause overheating or smoking of the 41800A. Agilent Technologies, Inc. assumes no
liability for customer's failure to comply with these requirements.
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Agilent 41800A Active Probe
Operation Note
Third Edition
SERIAL NUMBERS
This manual applies directly to Agilent 41800A Active Probe with serial number prefix 2850J.
Agilent Technologies
Innovating theHP Way
Agilent Part No. 41800-90010
December 1999
Printed in Japan
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Notices
The information contained in this document is subject to change without notice.
This document contains proprietary information that is protected by copyright. All rights
are reserved. No part of this document may be photocopied, reproduced, or translated to
another language without the prior written consent of the Agilent Technologies.
Agilent Technologies Japan, Ltd.
Component Test PGU-Kobe
1-3-2, Murotani, Nishi-Ku, Kobe-shi, Hyogo, 651-2241 Japan
Copyright © Agilent Technologies Japan, Ltd. 1988,1998,1999
Manual Printing History
The manual's printing date and part number indicate its current edition. The printing date
changes when a new edition is printed. (Minor corrections and updates that are
incorporated at reprint do not cause the date to change.) The manual part number changes
when extensive technical changes are incorporated.
December 1988 First Edition (part number: 41800-90000)
November 1998 Second Edition (part number: 41800-90010)
December 1999 Third Edition (part number: 41800-90010)
Safety Summary
The following general safety precautions must be observed during all phases of operation,
service, and repair of this instrument. Failure to comply with these precautions or with
specific WARNINGS elsewhere in this manual may impair the protection provided by the
equipment. In addition it violates safety standards of design, manufacture, and intended use
of the instrument.
Agilent Technologies assumes no liability for the customer's failure to comply with these
requirements.
•Ground The Instrument
To avoid electric shock hazard, the instrument chassis and cabinet must be connected
to a safety earth ground by the supplied power cable with earth blade.
•DO NOT Operate In An Explosive Atmosphere
Do not operate the instrument in the presence of flammable gasses or fumes. Operation
of any electrical instrument in such an environment constitutes a definite safety hazard.
2
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•DO NOT Substitute Parts Or Modify Instrument
Because of the danger of introducing additional hazards, do not install substitute parts
or perform unauthorized modifications to the instrument. Return the instrument to a
Agilent Technologies Sales and Service Office for service and repair to ensure that
safety features are maintained.
•Dangerous Procedure Warnings
Warnings, such as the example below, precede potentially dangerous procedures
throughout this manual. Instructions contained in the warnings must be followed.
Safety Symbol
General definitions of safety symbols used on the instrument or in manuals are listed
below.
Instruction Manual symbol: the product is marked with this symbol when it is necessary for
the user to refer to the instrument manual.
ti
0
EL
nv
WARNING
CAUTION
Alternating current.
Direct current.
On (Supply).
Off (Supply).
In position of push-button switch.
Out position of push-button switch.
Frame (or chassis) terminal. A connection to the frame (chassis) of the equipment which
normally include all exposed metal structure.
This warning sign denotes a hazard. It calls attention to a procedure, practice,
condition or the like, which, if not correctly performed or adhered to, could result in
injury or death to personnel.
This Caution sign denotes a hazard. It calls attention to a procedure, practice, condition or
the like, which, if not correctly performed or adhered to, could result in damage to or
destruction of part or all of the product.
NOTE Note denotes important information. It calls attention to a procedure, practice, condition or
the like, which is essential to highlight.
3
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Certification
Agilent Technologies certifies that this product met its published specifications at the time
of shipment from the factory. Agilent Technologies further certifies that its calibration
measurements are traceable to the United States National Institute of Standards and
Technology, to the extent allowed by the Institution's calibration facility, or to the
calibration facilities of other International Standards Organization members.
Warranty
This Agilent Technologies instrument product is warranted against defects in material and
workmanship for a period corresponding to the individual warranty periods of its
component products. Instruments are warranted for a period of one year. Fixtures and
adapters are warranted for a period of 90 days. During the warranty period, Agilent
Tec h nol o gi es will, at its option, either repair or replace products that prove to be defective.
For warranty service or repair, this product must be returned to a service facility designated
by Agilent Technologies. Buyer shall prepay shipping charges to Agilent Technologies and
Agilent Technologies shall pay shipping charges to return the product to Buyer. However,
Buyer shall pay all shipping charges, duties, and taxes for products returned to Agilent
Tec h nol o gi es from another country.
Agilent Technologies warrants that its software and firmware designated by Agilent
Tec h nol o gi es for use with an instrument will execute its programming instruction when
property installed on that instrument. Agilent Technologies does not warrant that the
operation of the instrument, or software, or firmware will be uninterrupted or error free.
Limitation of Warranty
The foregoing warranty shall not apply to defects resulting from improper or inadequate
maintenance by Buyer, Buyer-supplied software or interfacing, unauthorized modification
or misuse, operation outside the environmental specifications for the product, or improper
site preparation or maintenance.
IMPORTANT No other warranty is expressed or implied. Agilent Technologies specifically disclaims the
implied warranties of merchantability and fitness for a particular purpose.
Exclusive Remedies
The remedies provided herein are buyer's sole and exclusive remedies. Agilent
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Technologies shall not be liable for any direct, indirect, special, incidental, or
consequential damages, whether based on contract, tort, or any other legal theory.
Assistance
Product maintenance agreements and other customer assistance agreements are available
for Agilent Technologies products.
For any assistance, contact your nearest Agilent Technologies Sales and Service Office.
Addresses are provided at the back of this manual.
Typeface Conventions
Bold Boldface type is used when a term is defined. For
example: icons are symbols.
Italic Italic type is used for emphasis and for titles of
manuals and other publications.
[Hardkey] Indicates a hardkey labeled "Hardkey."
Softkey Indicates a softkey labeled "Softkey."
[Hardkey] - Softkey1 - Softkey2 Indicates keystrokes [Hardkey] - Softkey1 -
Softkey2.
5
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6
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TABLE OF CONTENTS
SECTION 1: GENERAL INFORMATION
INTRODUCTION 1-1
PRODUCT DESCRIPTION 1-1
COMPATIBLE INSTRUMENTS 1-1
SAFETY CONSIDERATIONS 1-1
UNITS COVERED BY THIS OPERATION NOTE 1-2
PRODUCT CONTENTS 1-3
SPECIFICATIONS 1-3
ACCESSORIES AVAILABLE 1-3
SECTION 2: INSTALLATION
SECTION CONTENTS 2-1
INITIAL INSPECTION 2-1
POWER REQUIREMENTS 2-3
MATING CONNECTORS 2-3
ENVIRONMENTAL REQUIREMENTS 2-3
PACKAGING 2-4
Original Packaging 2-4
Other Packaging 2-4
SECTION 3: OPERATION
SECTION CONTENTS 3-1
OVERVIEW 3-1
OPERATING PRECAUTIONS 3-5
Anti-static Precautions 3-5
Maximum Allowable Level 3-6
Discharging The Probe 3-6
PREPARATION FOR USE 3-7
Operating Check Using The HP 4195A 3-8
Operating Check Using Network Analyzer 3-10
Operating Check Using Spectrum Analyzer 3-11
10:1 / 100:1 Divider Adjustments 3-12
TYPICAL MEASUREMENT SETUPS 3-14
Network Measurements 3-15
Spectrum Measurements 3-18
PROBE PIN REPLACEMENT 3-20
iii
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SECTION 4: PERFORMANCE TEST
INTRODUCTION 4-1
EQUIPMENT REQUIRED 4-1
CALIBRATION CYCLE 4-2
PREPARATION 4-2
PROBE GAIN/FREQUENCY RESPONSE TESTS 4-3
1dB GAIN COMPRESSION TEST 4-8
SECTION 5: ADJUSTMENTS
INTRODUCTION 5-1
EQUIPMENT REQUIRED 5-1
PREPARATION 5-1
LF GAIN/FLATNESS ADJUSTMENT 5-2
SECTION 6: SERVICE
INTRODUCTION 6-1
REPLACEABLE PARTS 6-1
DISASSEMBLY 6-5
THEORY OF OPERATION 6-10
TROUBLESHOOTING GUIDE 6-10
iv
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SECTION 1
Network/Spectrum
Analyzer Spectrum Analyzer Network Analyzer
HP 4195A HP 3585A/B
HP 8568B
HP 71100A
HP 3577A
HP 8753A/B
GENERAL INFORMATION
INTRODUCTION This section provides the specifications and the information
necessary for receiving, performing an incoming inspection, and
preparing the HP 41800A for use.
PRODUCT
DESCRIPTION The HP 41800A is an Active Probe used with network and spec-
trum analyzers for circuit signal analysis. The following are the
main features of the HP 41800A.
•Wide frequency range; 5 Hz to 500 MHz
•High input impedance; 100 ks), 3 pF
•Used for both spectrum and network analyzers
•Protective sleeve (to protect the probe tip from ESD and
physical damage)
COMPATIBLE
INSTRUMENTS The HP 41800A can be used with the spectrum and network
analyzers listed in Table 1-1 which provide a probe power supply.
Table 1-1. Compatible instruments
SAFETY
CONSIDERATIONS The HP 41800A Active Probe conforms to the safety requirements
for IEC 348, and CSA 556B rated instruments, and is shipped
from the factory in a safe condition. This operation note contains
information, CAUTIONS and WARNINGS which must be followed
by the user to ensure safe operation.
1.1
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UNITS COVERED BY
THIS OPERATION
NOTE Hewlett-Packard uses a two-part, nine character serial number
which is stamped on the serial number plate (see Figure 1-1)
attached to the probe. The first four digits and a letter are the
prefix and the last five digits are the suffix of the serial number.
The letter in the serial number identifies the country where the
instrument was manufactured. The prefix is same for all identical
instruments, it changes only when a change is made to the in-
strument. The suffix, however, is assigned sequentially and is
different for each instrument. This operation note applies to
instruments with serial number prefixes listed under Serial Num-
bers on the title page.
LYOKOGAWA HEWLETT PACKARD
SERIAL NO
MADE IN JAPAN
Figure 1-1. Serial Number Plate
Units manufactured after this operation note was printed may
have a serial number prefix which is not listed on the title page.
An unlisted serial number prefix indicates that the instrument may
be different from those described in this operation note. Opera-
tion notes for new instruments may be accompanied by a yellow
Manual Supplement page, or have a different part number. This
supplement contains "Change Information" explaining how to
adapt this operation note to newer instruments.
In addition to change information, the supplement may contain
information for correcting errors (Errata) in previous operation
notes. To keep this operation note as current and accurate as
possible, Hewlett-Packard recommends that you periodically
request the latest Manual Change supplements. The supplement
for this operation note is identified by the Print Date and Part
Number, both of which appear on the operation note's title page.
For information concerning the serial number prefixes not listed
on the title page or in the Manual Change supplements, contact
your nearest Hewlett-Packard sales office.
1-2
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PRODUCT
CONTENTS Table 1-2 lists the contents of the HP 41800A. Refer to Figure 2-1
for details.
Description Qty.
Probe Assembly 1
HP 10218A Probe-BNC (m) Adapter 1
10:1 Divider 1
100:1 Divider 1
Slip-on Spanner Ground Tip 1
Ground Clip (flexible) 1
Probe Tip Nut Driver (3/32 inch) 1
HP 10229A Hook Tip Adapter 1
Spare Probe Pin Set 1
Carrying Case 1
Description HP Model Number
Probe Power Supply
N(m) Adapter
Probe Power Divider
HP 1122A
HP 11880A
HP 41801A
Table 1-2. Contents of the HP 41800A
SPECIFICATIONS The specifications for the HP 41800A Active Probe are listed in
Tab le 1-3. The specifications are performance standards or limits.
The HP 41800A meets all of the specifications listed in Table 1-3
when it is shipped from the factory.
ACCESSORIES
AVAILABLE For making certain types of measurements and for convenience
in connecting samples, the accessories listed in Table 1-4 are
available.
Tab le 1-4. Available Accessories
1-3
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Table 1-3. Specifications (1 of 3)
•Specifications describe the instrument's warranted performance over the tem-
perature range of 23 ±5°C (except where noted).
•The following performance is specified when the probe is terminated with an
HP 11880A Type N Adapter.
•Supplemental characteristics are intended to provide information useful in ap-
plying the instrument by giving non-warranted performance parameters. These
are denoted as "typical", "nominal", or "approximate".
Bandwidth: 5Hz to 500 MHz
Probe Gain:
Probe Alone: 0 dB ±0.5 dB at 50 MHz
With 10:1 Divider (Typical): -20 dB ± 1 dB at 50 MHz
With 100:1 Divider (Typical): -40 dB ±1.5 dB at 50 MHz
Input R, C (Typical):
Probe Alone: 100 Kn, 3 pF
With 10:1 Divider: 1 MQ, 1.5 pF
With 100:1 Divider: 1 MS2, 1 pF
Frequency Response Relative to 50 MHz:
Probe Alone: +1/-2 dB at <50 Hz
±1 dB at 50 Hz to 200 MHz
+1.5/-2 dB at >200 MHz
With 10:1 Divider (Typical): +1.5/-2.5 dB at <50 Hz
±1.5 dB at 50 Hz to 200 MHz
+2/-2.5 dB at >200 MHz
With 100:1 Divider (Typical): +2/-3 dB at <50 Hz
±2 dB at 50 Hz to 200 MHz
+2.5/-3 dB at >200 MHz
1-4
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Table 1-3. Specifications (2 of 3)
Average Noise Level (Typical):
Noise Level [ V/Fli]
10 100 1k
2nd Harmonic Distortion (Typical):
10 nV/s/Hz at >300 kHz
+3 dB/Oct at <300 kHz
(Refer to the following figure.)
10k 100k 300k 1M 10M 100M 500M
Frequency ( f) [ Hz
<-50 dBc at -20 dBm (250 MHz) input
3rd Order Intermodulation Distortion (Typical):
<-70 dBc at -26 dBm two signals input (400 MHz,
400.5 MHz)
1dB Gain Compression: >+3 dBm input at 500 MHz
Maximum Allowable Input (DC+AC): ±50 V (probe alone)
±200 V (with divider)
1-5
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