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Keysight E4980A/AL
Precision LCR Meter
User’s Guide
Keysight E4980A Precision LCR Meter
User’sGuide
Eleventh Edition
FIRMWARE REVISIONS
This manual applies directly toinstruments that have the firmware revisionA.03.xx.
For additional information about firmware revisions, see Appendix A.
Manufacturing No. E4980-90200
September 2013
Notices
FIRMWARE REVISIONS
This manual applies directly to instruments that have the firmware revision A.05.xx.
For additional information about firmware revisions, see Appendix A.
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 Keysight Technologies.
Microsoft
trademarks or a trademark of Microsoft Corporation in the United States and/or other
countries.
The manual’s printing date and manufacturing 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 manufacturing number
changes when extensive technical changes are incorporated.
®
, MS-DOS®, Windows® and MS Windows®, Visual Studio® are registered
March 2006 First Edition (manufacturing number: E4980-90000)
July 2006 Second Edition (manufacturing number: E4980-90010)
November 2006 Third Edition (manufacturing number: E4980-90020)
May 2007 Fourth Edition (manufacturing number: E4980-90030)
July 2007 Fifth Edition (manufacturing number: E4980-90050)
October 2007 Sixth Edition (manufacturing number: E4980-90060)
June 2008 Seventh Edition (manufacturing number: E4980-90070)
June 2010 Eighth Edition (manufacturing number: E4980-90080)
December 2012 Nineth Edition (manufacturing number: E4980-90080)
May 2013 Tenth Edition (manufacturing number: E4980-90090)
September 2013 Eleventh Edition (manufacturing number: E4980-90200)
November 2014 Twelve-th Edition (manufacturing number: E4980-90210)
2
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. Such noncompliance would also violate safety standards of design,
manufacture, and intended use of the instrument. Keysight Technologies assumes no
liability for the customer’s failure to comply with these precautions.
NOTEThe E4980A complies with INSTALLATION CATEGORY II as well as POLLUTION
DEGREE 2 in IEC61010-1. The E4980A is an INDOOR USE product.
NOTEThe LEDs in the E4980A are Class 1 in accordance with IEC60825-1,
CLASS 1 LED PRODUCT
•Ground the Instrument
To avoid electric shock, the instrument chassis and cabinet must be grounded with the
supplied 3-pole power cable’s grounding prong.
•DO NOT Operate in an Explosive Atmosphere
Do not operate the instrument in the presence of inflammable gasses or fumes.
Operation of any electrical instrument in such an environment clearly constitutes a
safety hazard.
•Keep Away from Live Circuits
Operators must not remove instrument covers. Component replacement and internal
adjustments must be made by qualified maintenance personnel only. Do not replace
components with the power cable connected. Under certain conditions, dangerous
voltage levels may remain even after the power cable has been disconnected. To avoid
injuries, always disconnect the power and discharge circuits before touching them.
•DO NOT Service or Adjust the Instrument Alone
Do not attempt internal service or adjustment unless another person, capable of
rendering first aid and resuscitation, is present.
•DO NOT Substitute Parts or Modify the Instrument
To avoid the danger of introducing additional hazards, do not install substitute parts or
perform unauthorized modifications to the instrument. Return the instrument to a
Keysight Technologies Sales and Service Office for service and repair to ensure that
safety features are maintained in operational condition.
•Dangerous Procedure Warnings
Warnings in this manual, such as the example below, precede potentially dangerous
procedures. Instructions contained in the warnings must be followed.
WARNINGDangerous voltage levels, capable of causing death, are present in this instrument.
Use extreme caution when handling, testing, and adjusting this instrument.
3
Safety Symbols
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.
Alternating current.
Direct current.
On (Supply).
Off (Supply).
In-position of push-button switch.
Out-position of push-button switch.
A chassis terminal; a connection to the instrument’s chassis, which includes all exposed
metal structure.
Stand-by.
WARNINGThis warning sign denotes a hazard. It calls attention to a procedure, practice, or
condition that, if not correctly performed or adhered to, could result in injury or
death to personnel.
CAUTIONThis Caution sign denotes a hazard. It calls attention to a procedure, practice, or condition
that, if not correctly performed or adhered to, could result in damage to or destruction of
part or all of the instrument.
NOTEThis Note sign denotes important information. It calls attention to a procedure, practice, or
condition that is essential for the user to understand.
Certification
Keysight Technologies certifies that this product met its published specifications at the
time of shipment from the factory. Keysight 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 by the
calibration facilities of other International Standards Organization members.
4
Warranty
This Keysight 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. During the
warranty period, Keysight Technologies 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 Keysight Technologies. The buyer shall prepay shipping charges to Keysight
Technologies, and Keysight Technologies shall pay shipping charges to return the product
to the Buyer. However, the Buyer shall pay all shipping charges, duties, and taxes for
products returned to Keysight Technologies from another country.
Keysight Technologies warrants that its software and firmware designated by Keysight
Technologies for use with an instrument will execute its programming instruction when
properly installed on that instrument. Keysight 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 the Buyer, Buyer-supplied software or interfacing, unauthorized
modification or misuse, operation outside the environmental specifications for the product,
or improper site preparation or maintenance.
IMPORTANTNo other warranty is expressed or implied. Keysight Technologies specifically disclaims
the implied warranties of merchantability and fitness for a particular purpose.
Exclusive Remedies
The remedies provided herein are the Buyer’s sole and exclusive remedies. Keysight
Technologies shall not be liable for any direct, indirect, special, incidental, or
consequential damages, whether based on contract, tort, or any other legal theory.
5
Assistance
Product maintenance agreements and other customer assistance agreements are available
for Keysight Technologies products.
For any assistance, contact your nearest Keysight Technologies Sales and Service Office.
Addresses are provided at the back of this manual.
Typeface Conventions
Sample (bold) Boldface type is used for emphasis.
Sample (Italic) Italic type is used for emphasis and manual title.
[Sample] key Indicates a hardkey (key on the front panel or
external keyboard) labeled “Sample.” “key” may
be omitted.
Sample menu/button/box Indicates a menu/button/box on the screen labeled
“Sample” that can be selected/executed by
clicking “menu,” “button,” or “box,” may be
omitted.
Sample 1 - Sample 2 - Sample 3 Indicates a sequential operation of Sample 1,
Sample 2, and Sample 3 (menu, button, or box).
“-” may be omitted.
Documentation Map
The following manuals are available for the Keysight E4980A.
•User’s Guide (Manufacturing Number E4980-900x0, attached to Option ABA,
English)
This manual describes most of the basic information on the E4980A. It provides a
detailed operation procedure for each function (from the function overview to system
settings), measurement examples, options, accessories, specifications, GPIB
commands, function lists by softkeys, and error messages.
NOTEThe number position shown by “x” in the manufacturing number above indicates the
edition number.
6
Sample Programs
The customer shall have the personal, nontransferable rights to use, copy, or modify
SAMPLE PROGRAMS in this manual for the Customer’s internal operations. The
customer shall use the SAMPLE PROGRAMS solely and exclusively for their own
purpose and shall not license, lease, market, or distribute the SAMPLE PROGRAMS or
modifications of any part thereof.
Keysight Technologies shall not be liable for the quality, performance, or behavior of the
SAMPLE PROGRAMS. Keysight Technologies especially disclaims that the operation of
the SAMPLE PROGRAMS shall be uninterrupted or error free. The SAMPLE
PROGRAMS are provided AS IS.
keysight TECHNOLOGIES DISCLAIMS IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
Keysight Technologies shall not be liable for any infringement of any patent, trademark,
copyright, or other proprietary rights by the SAMPLE PROGRAMS or their use. Keysight
Technologies does not warrant that the SAMPLE PROGRAMS are free from
infringements of such rights of third parties. However, Keysight Technologies will not
knowingly infringe or deliver software that infringes the patent, trademark, copyright, or
other proprietary right of a third party.
This chapter describes how to set up and start the Keysight E4980A/AL Precision LCR
Meter.
21
Contents of this
Chapter
Unpacking and Preparation
oChecking the Shipment on page 23
After you receive the E4980A/AL, check all the items in the packing container.
oPreparations before Use on page 26
Shows how to check the power supply as well as check and connect the power
cable. This section also describes how to deal with a blown fuse.
oHow to Remove the Handle on page 29
Shows how to attach and remove the handle.
oEnvironmental Requirements on page 31
Describes the system requirements needed to install the E4980A/AL and how to
secure space for heat radiation.
oStarting the E4980A/AL on page 34
Describes how to turn on/off the power switch and cut off the power supply.
22Chapter 1
Unpacking and Preparation
Checking the Shipment
Checking the Shipment
After you receive the E4980A/AL, carry out checks during unpacking according to the
following procedure.
WARNINGIf the external face of the LCR meter (such as the cover, front/rear panel, LCD screen,
power switch, and port connectors) appears to have been damaged during transport,
do not turn on the power switch. Otherwise, you may get an electrical shock.
Step 1. Check that the packing box or shock-absorbing material used to package the LCR meter
has not been damaged.
NOTEIf the packing box or shock-absorbing material has been damaged, leave the packing box
and shock-absorbing material as is until other inspection items are checked as follows:
Step 2. Check the packaged items supplied with the LCR meter for any damage or defects.
1.Unpacking and Preparation
Step 3. Referring to Table 1-1 and Figure 1-1, check that all packaged items supplied with the LCR
meter have been provided as per the specified options.
Step 4. After checking, if one of the following applies, contact your nearest Keysight Technologies
sales and service office.
1. The packing box or shock-absorbing material used to package the LCR meter has been
damaged or the shock-absorbing material displays traces of where extreme pressure has
been applied.
2. A packaged item supplied with the LCR meter has mechanical damage or defects.
3. A packaged item supplied with the LCR meter is missing.
4. A fault has been detected in the subsequent operation check of the LCR meter.
If an abnormality is detected in Step 1, contact the company that transported the LCR
meter as well as your nearest Keysight Technologies sales and service office. For
inspection by the transport company, save the packing box, shock-absorbing material, and
packaged items as you received them.
Chapter 1 23
Unpacking and Preparation
Checking the Shipment
Table 1-1 Items Packaged with the E4980A/AL
NameProduct/Part
Number
Standard Accessories
oE4980A/AL/ALE4980A/AL1
oPower cable
*1
8120-47531
oUSB Cable82357-616011
oCD-ROM (of the manual and the sample program)
oCD-ROM (of the Keysight IO Libraries suite)
See footnote
See footnote
*2
*2
Options
oManual (Option ABA)
•User’s Guide
oRack mount kit without handles (Option 1CM)
oAdapter (Option 002)
*4
See footnote
*3
5063-92411
E4980-60102 1
*2
*1.This accessory varies from country to country. For the power cable option, see Table 1-3.
A 3p-2p conversion adapter is not supplied.
*2.The LCR meter will always be supplied with the latest versions of these items.
*3. This accessory is not shown in Figure 1-1. For how to install the rack mount kit, refer to
the attached manual.
*4. This accessory is not shown in Figure 1-1.
Qty
1
1
1
24Chapter 1
Figure 1-1 E4980A/AL Accessories
㪼㪋㪐㪏㪇㪸㫌㪼㪈㪇㪉㪉
E4980A
Precision LCR Meter
20 Hz - 2 MHz
L
CUR
L
POT
H
POT
H
CUR
DC
Bias
USB
DC
Source
UNKNOWN
Discharge test device before connecting
r42V Peak Max Output CAT I
r10VDC Max
DC Source
(Option 001)
Trigger
DC Bias
DC
Source
Return
789
456
123
0
.
Preset
Display
Format
Meas
Setup
Recall A Recall B
Save/
Recall
System
Local/
Lock
㪪㫋㪸㫅㪻㪸㫉㪻㩷㪘㪺㪺㪼㫊㫊㫆㫉㫀㪼㫊㪦㫇㫋㫀㫆㫅
㪜㪋㪐㪏㪇㪘
㪧㫆㫎㪼㫉㩷㪚㪸㪹㫃㪼
㪚㪛㪄㪩㪦㪤㬍㪉
㪬㪪㪙㩷㪚㪸㪹㫃㪼
㪬㫊㪼㫉㩾㫊㩷㪞㫌㫀㪻㪼
1.Unpacking and Preparation
Unpacking and Preparation
Checking the Shipment
Chapter 1 25
Table 1-2
㪼㪋㪐㪏㪇㪸㫌㪼㪈㪇㪇㪏
㪝㫌㫊㪼㩷㪿㫆㫃㪻㪼㫉
㪧㫆㫎㪼㫉㩷㪚㪸㪹㫃㪼㩷㪠㫅㫃㪼㫋
Unpacking and Preparation
Preparations before Use
Preparations before Use
Verifying the Power Supply
Confirm that the power supplied to the E4980A/AL meets the following requirements:
Requirements
Vo l t a g e
Frequency47 to 63 Hz
Maximum
power
consumption
*1. Switched automatically by the E4980A/AL in conformity with the voltage used.
90 to 132 Vac or 198 to 264 Vac
150 VA
Setting up the Fuse
Please use the following fuse type.
UL/CSA type, Slo-Blo, 5∞20-mm miniature fuse, 3 A, 250 V (Keysight part number
2110-1017)
When you need a fuse, contact your nearest Keysight Technologies sales and service
office. To verify and replace the fuse, remove the power cable and pull out the fuse holder.
Figure 1-2 Fuse Holder and Power Cable Receptacle
*1
26Chapter 1
Unpacking and Preparation
Preparations before Use
Verifying and Connecting the Power Cable
The three-wire power cable attached to the E4980A/AL has one wire serving as a ground.
Using this power cable allows the E4980A/AL to be grounded, thereby protecting you
against electrical shock from the power outlet.
Step 1. Confirm that the power cable is not damaged.
WARNINGNever use a power cable showing any sign of damage. Faulty cables can cause electric
shock.
Step 2. Use the supplied cable to connect the power cable receptacle on the real panel of the
E4980A/AL to a three-wire power outlet with the grounding prong firmly held in the
ground slot.
WARNINGUse the supplied three-wire power cable with a grounding wire to securely ground the
E4980A/AL.
1.Unpacking and Preparation
NOTEA 3p-2p conversion adapter is not supplied with the LCR meter. When you need a 3p-2p
conversion adapter, contact your nearest Keysight Technologies sales and service office
listed in the back of this manual.
Figure 1-3 shows the power cable options.
Chapter 1 27
Unpacking and Preparation
Preparations before Use
Figure 1-3 Power cable options
28Chapter 1
How to Remove the Handle
㪼㪋㪐㪏㪇㪸㫌㫁㪈㪈㪌㪈
㽲
㽲
㽳
㽴
A handle kit is attached to the E4980A/AL. When using the E4980A/AL with the
rack-mount kit, remove the handle according to the following steps.
Figure 1-4 How to remove the handle
1.Unpacking and Preparation
Unpacking and Preparation
How to Remove the Handle
Step 1. Lift the handle perpendicular to the unit while pulling it in the direction of 1.
Step 2. While pulling the handle in the direction of 1, lift towards 2.
NOTEInstall the handle with 3 facing toward the front. Installing the handle the other way around
may damage it.
Chapter 1 29
Unpacking and Preparation
㪼㪋㪐㪏㪇㪸㫌㫁㪈㪈㪎㪌
Caution when Using the Handle
Caution when Using the Handle
Follow the instructions below when using the E4980A/AL’s handle, otherwise you may get
your fingers caught in the handle or the E4980A/AL may fall and be damaged
•When the handle is set up as shown in Figure 1-5, do not put any additional weight onto
the E4980A/AL or lift it suddenly.
•Do not touch the handle while the DUT is attached.
Figure 1-5 The handle in the set-up position
30Chapter 1
Table 1-3
1.Unpacking and Preparation
Unpacking and Preparation
Environmental Requirements
Environmental Requirements
Set up the E4980A/AL where the following environmental requirements are satisfied.
Operating Environments
Ensure that the operating environment meets the following requirements.
Tem peratu re0⋅C to 55⋅C
Temperature range at calibration23⋅C ± 5⋅C (<1⋅C deviation from the temperature when
performing calibration)
Humidity15% to 85% at wet bulb temperature ≤ 40⋅C
(non-condensation)
Altitude0 to 2,000 m (0 to 6,561 feet)
VibrationMax. 0.5 G, 5 Hz to 500 Hz
CAUTIONThe environmental requirements listed above are NOT for the specifications and
measurement accuracy of the E4980A/AL, but for its operating environment.
Chapter 1 31
Unpacking and Preparation
㪼㪋㪐㪏㪇㪸㫌㫁㪈㪇㪉㪐
Precis i o n LCR Meter
20 Hz - 2 MHz
DC
DC
UNKNOWN
Discharge test device before connecting
r42V Peak Max Output CAT I
DC Source
(Option 001/101)
Trig g er
DC Bias
DC
Source
Return
789
456
123
0
.
Preset
Display
Format
Meas
Setu p
Recall A Recall B
Save/
Recall
System
Local/
Lock
㻢㪍㪇㩷㫄㫄㻢㪍㪇㩷㫄㫄
㻢㪈㪏㪇㩷㫄㫄
Environmental Requirements
Ventilation Requirements
To ensure that the safety requirements, the specifications, and the measurement accuracy of
the LCR meter are met, you must maintain the environmental temperature to within the
specified range by providing an appropriate cooling clearance around the LCR meter or,
for the rack-mounted type, by forcefully air-cooling inside the rack housing. For more
information on environmental temperatures that satisfy the specifications and measurement
accuracy of the LCR meter, see Chapter 11, “Specifications and Supplemental
Information,” on page 401.
The LCR meter conforms to the requirements of the safety standard.When the
environmental temperature around the LCR meter is kept within the temperature range of
the operating environment specifications (“Operating Environments” on page 31).
The LCR meter still conforms to the requirements of the safety standard it is installed with
the following cooling clearance:
Requirements
Back 180 mm
Sides 60 mm (both right and left)
Figure 1-6 Ventilation space at installation
32Chapter 1
Protection Against Electrostatic Discharge (ESD)
Figure 1-7 shows the setup for a static-safe work station to protect the electronic
components from damage by electrostatic discharge (ESD).
Figure 1-7 Example of a static-free work station
1.Unpacking and Preparation
Unpacking and Preparation
Environmental Requirements
Ensuring Adequate Free Space around the LCR meter for Immediate
Disconnection of the Power Cable in Case of Emergency
As described in “Disconnecting from the Supply Source” on page 35, the plug attached to
the power cable serves as the disconnecting device (device that cuts off the power supply)
for the E4980A/AL. When installing the E4980A/AL, ensure that there is sufficient free
space around the unit to permit quick disconnection of the plug (from the AC outlet or the
E4980A/AL unit) in case of emergency.
Chapter 1 33
Table 1-4
Unpacking and Preparation
Starting the E4980A/AL
Starting the E4980A/AL
This section describes how to turn on/off the E4980A/AL power and how to cut off the
power supply in an emergency.
Turning the Power ON and OFF
Turning the Power ON
The ON and OFF status of the power switch is confirmed by the color of the
switch.
Color of the lightStatus of the power
OrangePower on
Yellow-greenPower off
Light offPower off (The power supply is cut off)
Step 1. Confirm that the power switch light in the lower-left part of the front panel is lit in
orange. If the light is off, the power supply may also be off.
Step 2. Press the power switch. When the light of the power switch turns yellow-green, the power
is turned ON and the E4980A/AL starts the self-test.
The self-test takes approx. 30 seconds.
Step 3. Confirm that the self-test indicates normal operation.
Normal operation is confirmed by the self-test if no error message appears.
Turning the Power OFF
Step 1. Follow the method below to turn the power OFF.
•Press the power switch in the lower-left part of the front panel.
NOTEDo not turn the power OFF while saving into or recalling from the internal memory of the
E4980A/AL or the USB memory. Doing so may clear the contents from the memory.
34Chapter 1
Unpacking and Preparation
Starting the E4980A/AL
Disconnecting from the Supply Source
The plug attached to the power cable (on the power outlet side or device side of the cable)
serves as the disconnecting device (device that cuts off the power supply) of the
E4980A/AL. When the power supply must be cut off to avoid such danger as electric
shock, pull out the power cable’s plug (on the power outlet side or device side of the cable).
NOTETo allow this operation to be performed smoothly, be sure to follow the guidelines in
“Ensuring Adequate Free Space around the LCR meter for Immediate Disconnection of the
Power Cable in Case of Emergency” on page 33.
When turning the power OFF under normal circumstances, always follow the methods
described in “Turning the Power OFF” on page 34.
1.Unpacking and Preparation
Chapter 1 35
Unpacking and Preparation
Starting the E4980A/AL
36Chapter 1
2. Overview
2 Overview
This chapter provides the basic procedures for operating the E4980A/AL and describes
names and functions of the front panel, rear panel, and screen display.
37
Overview
Product Introduction
Product Introduction
The Keysight E4980A/AL is a general-purpose LCR meter for incoming inspection of
components, quality control, and laboratory use. The E4980A/AL is used for evaluating
LCR components, materials, and semiconductor devices over a wide range of frequencies
(20 Hz to 300 kHz/500 kHz/1 MHz/2 MHz) and test signal levels (0.1 mVrms to 2 Vrms,
50 μA to 20 mArms). With Option 001, the E4980A/AL’s test signal level range spans 0.1
mV to 20 Vrms, and 50 μA to 200 mArms. Also, the E4980A/AL with Option 001 enables
up to ±40-Vrms DC bias measurements (without Option 001, up to ± 2 Vrms), DCR
measurements, and DC source measurements using the internal voltage source.
The E4980A/AL offers C-D measurement with a basic accuracy of ±0.05% (C), ±0.0005
(D) at all frequencies with seven-digit resolution (the dissipation factor resolution is 1
ppm) in every range.
With its built-in comparator, the E4980A/AL can output comparison/decision results for
sorting components into a maximum of ten bins. Furthermore, by using the handler
interface and scanner interface options, the E4980A/AL can be easily combined with a
component handler, a scanner, and a system controller to fully automate component testing,
sorting, and quality-control data processing.
The E4980A/AL’s list sweep function permits entry of up to 201 frequencies, test signal
levels, or bias level points to be automatically measured.
The GP-IB/LAN/USB interfaces are standard interfaces on the E4980A/AL and enable
automatic testing.
38Chapter 2
Front Panel: Names and Functions of Parts
㪼㪋㪐㪏㪇㪸㫌㪼㪈㪇㪈㪉
㪈㪅㪧㫆㫎㪼㫉㩷㪪㫎㫀㫋㪺㪿
㪉㪅㪣㪚㪛㩷㪛㫀㫊㫇㫃㪸㫐㪋㪅㪤㪼㫅㫌㩷㪢㪼㫐
㪌㪅㪚㫌㫉㫊㫆㫉㩷㪢㪼㫐
㪍㪅㪜㫅㫋㫉㫐㩷㪢㪼㫐
㪎㪅㪣㪜㪛㩷㪠㫅㪻㫀㪺㪸㫋㫆㫉
㪏㪅㪧㫉㪼㫊㪼㫋㩷㪢㪼㫐
㪐㪅㪫㫉㫀㪾㪾㪼㫉㩷㪢㪼㫐
㪈㪇㪅㪛㪚㩷㪙㫀㪸㫊㩷㪢㪼㫐
㪈㪈㪅㪛㪚㩷㪪㫆㫌㫉㪺㪼㩷㪢㪼㫐
㪈㪉㪅㪬㪥㪢㪥㪦㪮㪥㩷㪫㪼㫉㫄㫀㫅㪸㫃
㪈㪋㪅㪞㫉㫆㫌㫅㪻㩷㪫㪼㫉㫄㫀㫅㪸㫃
㪈㪌㪅㪛㪚㩷㪪㫆㫌㫉㪺㪼㩷㪫㪼㫉㫄㫀㫅㪸㫃㩷
Precision LCR Meter
20 Hz - 2 MHz
DC
DC
UNKNOWN
Discharge test device before connecting
r42V Peak Max Output CAT I
DC Source
(Option 001)
Trigger
DC Bias
DC
Source
Return
789
456
123
0
.
Preset
Display
Format
Meas
Setup
Recall A Recall B
Save/
Recall
System
Local/
Lock
㪊㪅㪪㫆㪽㫋㩷㪢㪼㫐
㪈㪊㪅㪝㫉㫆㫅㫋㩷㪬㪪㪙㩷㪧㫆㫉㫋
This section describes the names and functions of the parts on the E4980A/AL’s front
panel. For more details on the functions displayed on the LCD screen, see “Screen Area:
Names and Functions of Parts” on page 46. For more about the functions of softkeys, see
“Softkey Functions” on page 385.
Figure 2-1 Front panel
Overview
Front Panel: Names and Functions of Parts
2. Overview
WARNINGA maximum of 52 V of hazardous voltage between terminals might be present when
the LED indicator for DC Bias or DC Source lights up. Do NOT touch UNKNOWN
terminals, DC source terminals, or electrodes of test fixtures.
Turn off the output of DC Bias and DC source and confirm that LED indicators are
off when setting up the E4980A/AL and its accessories.
Chapter 2 39
Overview
Front Panel: Names and Functions of Parts
1. Power switch
Used for choosing between power-on and -off states of the E4980A/AL. When turned on,
the switch lights up in yellow-green and all operating voltages are applied to the
instrument. When turned off, the switch lights up in orange and no operating voltages are
applied to the instrument.
2. LCD
The Liquid Crystal Display (LCD) displays measurement results, test conditions, etc.
NOTEOccasionally there are missing pixels or constantly lit pixels, but this is not a malfunction
and does not affect the performance of your product.
3. Softkeys
Five softkeys are used to select measurement conditions and parameter functions. Each
softkey has a softkey label along its left side.
4. Menu keys
Menu selection keys are used to access the corresponding selection of instrument controls.
Tab l e 2 -1
[Display Format] keyDisplays measurement results and selections.
[Meas Setup] keySets measurement conditions, a correction function, and
limit values for BIN sorting.
[Recall A] keyRecalls the setting information on internal memory 0.
[Recall B] keyRecalls the setting information on internal memory 1.
[Save/Recall] keySaves and recalls the setting information. Saves
measurement results and screen images.
[System] keySets the system. Sets the GP-IB interface and LAN.
Performs a self-test.
[Local/Lock] keyLocks and unlocks hard keys and softkeys on the front
panel. Cancels remote control with GPIB commands.
5. Cursor keys
Keys used to move the field select cursor from field to field on a displayed page. When the
cursor is moved to a certain field, that field changes to an inverse video image of the
original field. The cursor can only be moved from field to field.
For the skip key, refer to the “How to Use Skip Keys” on page 50.
6. Entry keys
Keys used to enter numeric data into the E4980A/AL. The entry keys comprise the digits 0
to 9, a period (.), and a plus/minus (+/-) sign. Entered values are displayed on the input line
40Chapter 2
Overview
Front Panel: Names and Functions of Parts
(second line from the bottom of the LCD screen), and pressing the softkey terminates
numeric input. The plus/minus key deletes the last character of the input value.
7. LED indicator
The LED indicator lights up when DC Bias or DC Source is on. The USB indicator lights
up while accessing a USB memory.
8. Preset key
A key used to return the LCR meter to the initial setup state. There are three methods for
initialization. For details, refer to “Initializing the Instrument” on page 90.
9. Trigger key
A key used to manually trigger the E4980A/AL when it is set to the manual trigger mode.
10. DC Bias key
A key used to toggle on and off of the DC bias output. When the DC bias output is set to
on, the DC bias indicator lights up and DCBIAS is displayed in the status display area on
the screen.
2. Overview
If the DC Bias key is set to off, even though the DC bias is set to on according to the LCD
display, the DC bias is not output.
NOTERegardless of which page is displayed, when the DC BIAS key is pressed, the value that
has been set in the BIAS field of MEAS SETUP (and MEAS DISPLAY) is output. For
example, in case that DC Bias sweep has been set with the LIST SWEEP DISPLAY page
displayed, the value set in the BIAS field is output when the DC BIAS key is pressed.
Then, after the E4980A/AL is triggered, the DC Bias is set according to the list that has
been set.
11. DC Source key
A key used to toggle on and off of the DC source output. When the DC source output is set
to on, the DC Source indicator lights up and DCSRC is displayed in the status display area
on the screen.
NOTEOption 001 is required for this function.
NOTERegardless of which page is displayed, when the DC SOURCE key is pressed, the value
that has been set in the DC SRC field of MEAS SETUP is output. For example, in case that
DC SRC sweep has been set with the LIST SWEEP DISPLAY page displayed, the value
set in the DC SRC field is output when the DC SRC key is pressed. Then, after the
E4980A/AL is triggered, the DC Source is set according to the list that has been set.
12. UNKNOWN terminals
These are the UNKNOWN terminals used to connect a four-terminal pair test fixture or test
leads for measuring the device under test (DUT).
Chapter 2 41
Overview
Front Panel: Names and Functions of Parts
NOTEWhen using a four-terminal pair test fixture or test leads with a stopper, remove the stopper
or the bumper of the E4980A/AL.
CAUTIONDo not apply DC voltage or current to the UNKNOWN terminals. Applying DC voltage or
current may lead to device failure. Connect the measurement sample (DUT) to the test port
(or the test fixture, cables, etc. connected to the test port) after the LCR meter has been
completely discharged.
The maximum load the UNKNOWN terminals can withstand is 10 kgf (nominal).
The test ports comply with Installation Category I of IEC 61010-1.
13. Front USB port
This port is used to save data in a USB memory. The USB indicator lights up while
accessing the USB memory.
Connector types: Universal Serial Bus (USB) Jack, Type A (four contact points), Female.
Compliance Standards: USB 1.1
NOTEDo not connect any device other than a USB memory to the USB port. We do not support
connections to the USB port of printers, devices with a built-in HDD, or USB hubs. To
print a screen, refer to “To save a screenshot into USB memory” on page 191.
NOTEDo not unplug the USB memory while the USB indicator is on.
USB memory type
Use USB memory that is USB mass-storage-class compliant and formatted with FAT16 or
FAT32. For points to notice, refer to “USB Memory Notes” on page 177.
Interface: USB 1.1
14. Ground terminal
Connected to the chassis of the E4980A/AL. This is used for measurements that require
guarding.
15. DC Source terminal
Outputs the DC source in the range from -10 V to 10 V. Option 001 is required for this
function.
NOTEThe DC source terminal is installed even in the E4980A/AL without Option 001; however,
the E4980A/AL without Option 001 cannot use this terminal.
42Chapter 2
Rear Panel: Names and Functions of Parts
㪼㪋㪐㪏㪇㪸㫌㪼㪈㪇㪇㪎
㪏㪅㩷㪝㪸㫅
㪍㪅㩷㪪㪼㫉㫀㪸㫃㩷㪥㫌㫄㪹㪼㫉㩷㪧㫃㪸㫋㪼
㪎㪅㩷㪧㫆㫎㪼㫉㩷㪚㪸㪹㫃㪼㩷㪩㪼㪺㪼㫇㫋㪸㪺㫃㪼㪌㪅㩷㪜㫏㫋㪼㫉㫅㪸㫃㩷㪫㫉㫀㪾㪾㪼㫉
㩷㩷㩷㩷㪠㫅㫇㫌㫋㩷㪚㫆㫅㫅㪼㪺㫋㫆㫉
㪋㪅㩷㪣㪘㪥㩷㪧㫆㫉㫋
㪊㪅㩷㪬㪪㪙㩿㪬㪪㪙㪫㪤㪚㪀㩷㪠㫅㫋㪼㫉㪽㪸㪺㪼㩷㪧㫆㫉㫋
㪉㪅㩷㪠㫅㫋㪼㫉㪽㪸㪺㪼㩷㪚㫆㫅㫅㪼㪺㫋㫆㫉
㪈㪅㩷㪞㪧㪠㪙㩷㪚㫆㫅㫅㪼㪺㫋㫆㫉
This section describes the names and functions of the parts on the E4980A/AL’s rear panel.
Figure 2-2 Rear panel
Overview
Rear Panel: Names and Functions of Parts
2. Overview
1. GPIB Interface Connector
General Purpose Interface Bus (GPIB). The connection of an external controller and other
devices through this connector allows you to configure an automatic measurement system.
2. Interface Connector
If interface options are installed, the interface connectors will be installed as shown. If the
E4980A/AL is not equipped with an interface option, blank panels will cover this portion.
Interfaces with which the E4980A/AL can be equipped as options are shown below.
Handler interface (Option E4980A/AL-201)
This interface is for data exchange with an automatic machine (handler) used on a
production line.
Connector type: 36-pin Centronics
Scanner interface (Option E4980A/AL-301)
The interface to connect a scanner to perform up to 128 sets of multi-channel corrections
and measurements.
Connector type: 14-pin Amphenol
Chapter 2 43
Overview
Rear Panel: Names and Functions of Parts
Bias current interface (Option E4980A/AL-002)
The interface to control the 42841A (Bias Current Source).
3. USB (USBTMC) Interface Port
Through this port, you can control the E4980A/AL via external controllers.
Connector Types: Universal Serial Bus (USB) jack, type mini-B (five contact points),
Female
Compliance Standards: USBTMC-USB488 and USB2.0
4. LAN Port
The port to connect the E4980A/AL to a LAN (Local Area Network). Connecting this
instrument to a LAN enables you to control this instrument by using SICL-LAN or telnet,
or from an external PC via a Web server.
This is compliant with LXI standard (LAN eXtensions for Instrumentation): version 1.1
Class C.
NOTEAuto-MDIX” function is effective on S/N MY4620XXX or later.
5. External Trigger Input Connector
The BNC connector to input the positive TTL pulse to trigger the E4980A/AL with
external trigger signals.(The trigger mode must be set to EXTernal.)
6. Serial Number Plate
The seal showing the product’s serial number.
7. Power Cable Receptacle (to LINE)
The receptacle (outlet) to which the power cable is connected.
NOTETo connect the device to a power source (outlet), use the supplied three-prong power cable
with a ground conductor.
The plug attached to the power cable (on the power outlet side or device side of the cable)
serves as the E4980A/AL’s disconnecting device (device that cuts off the power supply).
When the power supply must be cut off to avoid such danger as electric shock, pull out the
power cable plug (on the power outlet side or device side of the cable). For the procedure
for turning off the power in normal use, see the description in “1. Power switch” on
page 40.
For more on the power supply, see “Verifying and Connecting the Power Cable” on
page 27.
44Chapter 2
Overview
Rear Panel: Names and Functions of Parts
8. Fan
The cooling fan for controlling the temperature inside the E4980A/AL. This fan extracts
heated air from inside the LCR meter.
2. Overview
Chapter 2 45
Overview
㪼㪋㪐㪏㪇㪸㫌㪼㪈㪇㪊㪌
㪛㫀㫊㫇㫃㪸㫐㩷㪧㪸㪾㪼㩷㪘㫉㪼㪸㪚㫆㫄㫄㪼㫅㫋㩷㪘㫉㪼㪸
㪤㪼㪸㫊㫌㫉㫄㪼㫅㫋㩷㪛㪸㫋㪸㪆
㪚㫆㫅㪻㫀㫋㫀㫆㫅㩷㪘㫉㪼㪸
㪠㫅㫇㫌㫋㩷㪘㫉㪼㪸㪪㫐㫊㫋㪼㫄㩷㪤㪼㫊㫊㪸㪾㪼㩷㪘㫉㪼㪸㪪㫋㪸㫋㫌㫊㩷㪛㫀㫊㫇㫃㪸㫐㩷㪘㫉㪼㪸
㪪㫆㪽㫋㫂㪼㫐㩷㪘㫉㪼㪸
Screen Area: Names and Functions of Parts
Screen Area: Names and Functions of Parts
This section describes the names and functions of parts on the E4980A/AL’s LCD screen.
Figure 2-3 Screen display
1. Display Page Area
Shows a display page name of the current display page. On each display page, three lines
are collected together as one area.
2. Comment Line Area
You can input up to 30 characters in ASCII format by using the front panel or the
DISPlay:LINE command of the GPIB command. The first 22 characters are displayed in
this area.
This area is displayed on the following display pages.
•MEAS DISPLAY page
•BIN No. DISPLAY page
•BIN COUNT DISPLAY page
•LIST SWEEP DISPLAY page
•MEAS SETUP page
For the input method in the comment line, refer to “MEAS SETUP page” on page 91.
46Chapter 2
Overview
㪼㪋㪐㪏㪇㪸㫌㫁㪈㪈㪌㪎
ReturnReturn
Screen Area: Names and Functions of Parts
3. Softkey Area
Displays softkey labels corresponding to the field.
A displayed to the right of a softkey indicates that pressing that softkey will display the
softkey label one level lower.
Pressing the
softkey label one level higher. In this case, a is displayed on the label to the left of the
Return key.
Figure 2-4 Softkey Area
Return key when the lower level softkey label is displayed will display the
2. Overview
4. Measurement Data/Conditions Area
Displays measurement conditions and measurement results.
Under certain conditions one of the following messages may be displayed instead of the
measurement results. For details, refer to “Displaying Errors instead of Measurement
Results” on page 76.
MessageDescription
OVERLOADThis message is displayed when an overload occurs. For
details, refer to “Displaying Errors instead of
Measurement Results” on page 76.
---This means that no measurement has been made or the
data format will not hold the measurement results.
INFINITYThis message is displayed when a deviation mode of the
deviation measurement function is % and measurement
results cannot be calculated.
Chapter 2 47
Overview
Screen Area: Names and Functions of Parts
5. Input Line Area
Displays numeric values entered with the entry key.
6. System Message Area
Displays a system message, warning, and error message.
7. Status Display Area
Displays the status when DC bias or DC source is on, or any front panel key is locked.
When sending SCPI commands from the external controller, “RMT” is displayed and the
front panel keys are locked.
48Chapter 2
Overview
㪼㪋㪐㪏㪇㪸㫌㫁㪈㪈㪌㪍
㽳
㽳
㽲
㽲
Basic Operation
Basic Operation
The E4980A/AL’s basic operation is described below.
1. Display the desired page using both the MENU keys and softkeys.
2. Move the cursor to the desired field using the cursor keys. When the cursor is moved to
a certain field, the field changes to an inverse video image of the original. The cursor
can be moved from field to field (right and left or up and down).
3. The softkey labels corresponding to the field indicated by the cursor are displayed
automatically. Press the desired softkey.
Use the entry keys to input numeric data. When one of the entry keys is pressed, the
softkeys will change to the available unit softkeys. Pressing these unit softkeys
terminates numeric input.
The unit changes according to the field selected.
How to Use Cursor Keys
2. Overview
Move the cursor to the desired field using the cursor keys as shown in Figure 2-5.
Figure 2-5 Cursor keys and a field operation example
Chapter 2 49
Overview
㪼㪋㪐㪏㪇㪸㫌㪼㪈㪈㪌㪏
Return
㽳
㽲
㫇㫉㪼㫊㫊㩷㫋㫎㫀㪺㪼㩷㫊㫂㫀㫇㩷㫂㪼㫐
Basic Operation
How to Use Skip Keys
The following describes how to use a skip key.
On a display page, three lines are collected together as one. By using a skip key, you can
select the desired field quickly as the selected field moves from area to area.
Figure 2-6 Skip key and a field operation example
50Chapter 2
3 Display Format
3. Display Format
This chapter describes each page of the DISPLAY FORMAT MENU of the E4980A/AL.
51
Display Format
㪼㪋㪐㪏㪇㪸㫌㪼㪈㪇㪍㪉
㪑㩷㩷㪝㫀㪼㫃㪻
㪑㩷㩷㪤㫆㫅㫀㫋㫆㫉
㪤㪼㪸㫊㫌㫉㪼㫄㪼㫅㫋
㪩㪼㫊㫌㫃㫋㫊
䌻
MEAS DISPLAY Page
MEAS DISPLAY Page
When you press the [DISPLAY FORMAT] key, the MEAS DISPLAY page appears. The
following measurement controls can be set on this page (The field in parenthesis is used to
set measurement controls).
•Measurement Function (FUNC)
•Impedance range (RANGE)
•Test Frequency (FREQ)
•Test Signal Level (LEVEL)
•DC Bias (BIAS)
•Measurement Time Mode (MEAS TIME)
Figure 3-1 shows the available fields and the softkeys that correspond to the fields on this
page.
Figure 3-1 MEAS DISPLAY Page
Pressing the [DISPLAY FORMAT] key when Figure 3-1 is displayed enlarges the
measurement result as shown in Figure 3-2. Pressing the [DISPLAY FORMAT] key again
returns to the display in Figure 3-1.
52Chapter 3
Figure 3-2 The enlarged MEAS DISPLAY for measurement results
㪼㪋㪐㪏㪇㪸㫌㫁㪈㪇㪍㪊
Display Format
MEAS DISPLAY Page
3. Display Format
Chapter 3 53
Display Format
MEAS DISPLAY Page
Measurement Function
The E4980A/AL simultaneously measures two components of the complex impedance
(parameters) in a measurement cycle.
Regardless of the types of measurement parameters, the test signal voltage (VAC) and the
test signal current (IAC) are measured at the same time. When the E4980A/AL is equipped
with option 001, the DC bias voltage level (VDC) and the DC bias current level (IDC) are
measured simultaneously.
NOTERegardless of the types of measurement parameters, the measurement result for the R-X
parameter can be obtained using the SCPI command.
DC resistance (Rdc) can be measured when the E4980A/AL is equipped with either option
001, 030, 050, 100, or 200,
DC voltage (Vdc), and DC current (Idc) can be measured when the E4980A/AL is
equipped with option 001.
Types of measurement parameters
Types of measurement parameters are shown below.
Table 3-1 Measurement parameters
Primary parameterSecondary parameter
CpD, Q, G, Rp
CsD, Q, Rs
Lp
Ls
RX
Z
GB
Y
*2
Vdc
*1.This parameter can be set only when the E4980A/AL is equipped with either option
001, 030, 050, 100 or 200.
*2.This parameter can be set only when the E4980A/AL is equipped with option 001.
D, Q, G, Rp, Rdc
D, Q, Rs, Rdc
*1
θd, θr
θd, θr
*2
Idc
*1
NOTEWhen the measurement parameter is DC voltage measurement/DC current measurement
(Vdc-Idc), set the setting value of the test signal level (LEVEL field) to 0 V for accurate
measurement.
54Chapter 3
Measurement parameter descriptions
The primary parameter measurement result is located on the upper line and the secondary
parameter measurement result is on the lower line in Figure 3-1 on page 52.
Each parameter is described below.
Table 3-2 Primary parameter
ParameterDescription
CpCapacitance value measured using the parallel equivalent circuit model
CsCapacitance value measured using the series equivalent circuit model
LpInductance value measured using the parallel equivalent circuit model
LsInductance value measured using the series equivalent circuit model
RResistance
ZAbsolute value of impedance
GConductance
YAbsolute value of admittance
Display Format
MEAS DISPLAY Page
3. Display Format
*1
Vdc
*1.This parameter can be set only when the E4980A/AL is equipped with option 001.
DC voltage
Table 3-3 Secondary parameter
ParameterDescription
DDissipation factor
QQuality factor (inverse of dissipation factor)
GConductance
RsEquivalent series resistance measured using the series equivalent
circuit model
RpEquivalent parallel resistance measured using the parallel equivalent
circuit model
XReactance
BSustenance
θ
Idc
*1
Phase angle
DC current
*2
Rdc
*1.This parameter can be set only when the E4980A/AL is equipped with option 001.
*2.This parameter can be set only when the E4980A/AL is equipped with either option
001, 030, 050, 100 or 200.
DC resistance
Chapter 3 55
Display Format
MEAS DISPLAY Page
Equivalent parallel and serial combinations
The combinations of primary and secondary parameters, including the equivalent parallel
and series combinations, are listed below.
Table 3-4 Measurement function
Primary
parameter
Z
Y-----
CCs-D
LLs-D
RR-X-----
G-----G-B
Primary parameterSecondary parameter
Series modeParallel mode
Z-θr
Z-θd
Cs-Q
Cs-Rs
Ls-Q
Ls-Rs
Ls-Rdc
-----
Y- θr
Y- θd
Cp-D
Cp-Q
Cp-G
Cp-Rp
Lp-D
Lp-Q
Lp-G
Lp-Rp
Lp-Rdc
VdcIdc
NOTEMeasurement function Vdc-Idc does not have the series mode and parallel mode.
Procedure for setting the measurement function
Step 1. Press the [Display Format] key.
Step 2. Press the
Step 3. Use the cursor keys to select the FUNC field.
Step 4. Use the softkeys to select the primary parameter.
Step 5. If the secondary parameter exists, select the secondary parameter from measurement
parameters displayed using the softkeys.
NOTEFor the combinations of measurement parameters, refer to Table 3-1 on page 54.
56Chapter 3
MEAS DISPLAY softkey.
Impedance range
Impedance range mode
Two modes can be used to select the impedance range as shown in Table 3-5.
Table 3-5 Impedance range mode
ModeFunction overviewAdvantageDisadvantage
Display Format
MEAS DISPLAY Page
Auto range
(auto selection)
Hold range
(manual selection)
Available impedance range
The hold range has nine impedance ranges, but when option 001 is installed, it has ten. The
impedance range is selected according to the DUT’s impedance even if the measurement
parameter is capacitance or inductance.
The E4980A/AL sets
the optimum
impedance range for
the impedance of the
DUT.
Measurement is
performed with a fixed
impedance range
regardless of the
impedance of the
DUT.
Impedance range (Ω)
*1
100 m
, 1, 10, 100, 300, 1 k, 3k, 10 k, 30 k, 100k
You do not need
to select the
impedance range.
No ranging time
is required.
The
measurement
time is longer
due to the
ranging time.
You need to
select a proper
range depending
on the value of
the DUT.
3. Display Format
*1. This cannot be used when the test signal level is less than or equal to 2 V.
Chapter 3 57
Display Format
㪼㪋㪐㪏㪇㪸㫌㪼㪈㪇㪈㪋
㪈㪇㪅㪈㪈㪇㪈㪇㪇 㪊㪇㪇㪈㫂 㪊㫂㪈㪇㫂 㪊㪇㫂 㪈㪇㪇㫂㪈㪤㪈㪇㪤㪈㪇㪇㪤㪈㪞
㪦㪭㪣㪛
㪦㪭㪣㪛
㪦㪭㪣㪛
㪦㪭㪣㪛
㪦㪭㪣㪛
㪈㪇㪇㫂㱅
㪩㪸㫅㪾㪼
㪊㪇㫂㱅
㪩㪸㫅㪾㪼
㪈㪇㫂㱅
㪩㪸㫅㪾㪼
㪊㫂㱅
㪩㪸㫅㪾㪼
㪈㫂㱅
㪩㪸㫅㪾㪼
㪊㪇㪇㱅
㪩㪸㫅㪾㪼
㪈㪇㪇㱅
㪩㪸㫅㪾㪼
㪈㪇㱅
㪩㪸㫅㪾㪼
㪈㱅
㪩㪸㫅㪾㪼
㪈㪇㪇㫄㱅
㪩㪸㫅㪾㪼
㪠㫄㫇㪼㪻㪸㫅㪺㪼
㩷㪲㱅㪴
㪑㩷㪜㪽㪽㪼㪺㫋㫀㫍㪼㩷㪤㪼㪸㫊㫌㫉㫀㫅㪾㩷㪩㪸㫅㪾㪼
㪑㩷㪛㫀㫊㫇㫃㪸㫐㪸㪹㫃㪼㩷㪩㪸㫅㪾㪼
MEAS DISPLAY Page
Effective meausrement range for each impedance range for impedance measurement
Figure 3-3 shows the range that can be displayed and the effective measuring range for
each impedance range while in the impedance mode (| Z |, R, X). For example, 50-kΩ DUT
impedance can be measured using the ranges of 100 kΩ to 30 kΩ, but the E4980A/AL’s
accuracy specification is only met when using the 30-kΩ range. If this DUT is measured
with the 100-kΩ range, “OVERLOAD” will be displayed.
Figure 3-3 Effective measurement range for each impedance range (Impedance measurement)
Table 3-6 Effective measurement range for the impedance range when it is in the HOLD
state for impedance measurement
Impedance range (Ω)
*1
100 m
1
101.08 < Impedance ≤ 10.08
10010.08 < Impedance < 276
300276 ≤ Impedance < 0.92 k
1 k0.92 k ≤ Impedance < 2.76 k
3 k2.76 k ≤ Impedance < 9.2 k
10 k
30 k
100 k92 k ≤ Impedance
*1.This can be set when the test signal level is more than 2 V.
58Chapter 3
Effective measurement range
0 < Impedance ≤ 108 m
*2
108 m
9.2 k ≤ Impedance < 27.6 k
27.6 k ≤ Impedance < 92 k
< Impedance ≤ 1.08
*3
*4
Display Format
MEAS DISPLAY Page
*2.When the test signal level is less than or equal to 2 V or 20 mA, it is 0 (zero).
*3.When test frequency is more than 100 kHz and the test signal level is less than or
equal to 0.2 V (2 mA), it is more than 9.2 k.
*4.When test frequency is more than 100 kHz and the test signal level is more than 0.2 V
and less than or equal to 2 V (more than 2 mA and less than or equal to 20 mA), it is
more than 27.6 k.
Effective measurement range for each impedance range
The following shows the effective measurement range of each impedance range, in which
the E4980A/AL’s measurement accuracy meets its specifications.
When the impedance range is set manually, the optimum impedance range should be
selected by matching the impedance of the DUT to the effective measurement range shown
in Figure 3-4, Figure 3-5, and Figure 3-6. When the impedance range is set to AUTO, the
optimum impedance range is automatically selected according to the impedance of each
DUT.
NOTEThe impedance range is limited by the test frequency setting when the test signal level is
less than or equal to 2 V. When the impedance range and test frequency are set under the
above conditions, the test frequency must be set first, followed by the impedance range. If
you set the impedance range first and then frequency, the resulting impedance range may
not be the one you wanted to set.
3. Display Format
Chapter 3 59
Display Format
㪼㪋㪐㪏㪇㪸㫌㪼㪈㪇㪈㪌
㪈㪇㪇㪪
㪈㪇㪪
㪈㪞
㪈㪇㪪
㪈㪪
㪈㪇㪇㫄㪪
㪈㪇㫄㪪
㪈㫄㪪
㪈㪇㪇㱘㪪
㪈㪇㱘㪪
㪈㱘㪪
㪈㪇㪇㫅㪪
㪈㪇㫅㪪
㪈㫅㪪
㪇
㪈㪇㫄㱅
㪈㪇㪇㫄㱅
㪈㱅
㪈㪇㱅
㪈㪇㪇㱅
㪈㫂㱅
㪈㪇㫂㱅
㪈㪇㪇㫂㱅
㪈㪤㱅
㪈㪇㪤㱅
㪈㪇㪇㪤㱅
㪈㫄㱅
㪇
㪈㪞㱅
㪈㪇㫇㪝
㪈㫅㪝
㪈㪇㪇㫇㪝
㪈㪇㫅㪝
㪈㪇㪇㫅㪝
㪈㱘㪝
㪈㪇㱘㪝
㪈㪇㪇㱘㪝
㪈㫄㪝
㪈㪇㫄㪝
㪈㪇㪇㫄㪝
㪈㪝
㪈㪇㫅㪟
㪈㫅㪟
㪈㪇㪇㫇㪟
㪈㪇㪇㫅㪟
㪈㱘㪟
㪈㪇㱘㪟
㪈㪇㪇㱘㪟
㪈㫄㪟
㪈㪇㫄㪟
㪈㪇㪇㫄㪟
㪈㪟
㪈㪇㪟
㪈㪇㪇㪟
㪈㫇㪝
㪈㪇㪇㪽㪝
㪈㪇㪽㪝
㪈㪽㪝
㪈㪇㪇㪸㪝
㪈㫂㪟
㪈㪇㫂㪟
㪈㪇㪇㫂㪟
㪈㪤㪟
㪉㪇㪈㪇㪇㪈㫂㪈㪇㫂㪈㪇㪇㫂㪈㪤 㪉㪤
㪠㫅㪻㫌㪺㫋㪸㫅㪺㪼
㪚㪸㫇㪸㪺㫀㫋㪸㫅㪺㪼
㪠㫄㫇㪼㪻㪸㫅㪺㪼
㪘㪻㫄㫀㫋㫋㪸㫅㪺㪼
㪝㫉㪼㫈㫌㪼㫅㪺㫐
㪈㪇㪇㫂㱅㩷㪩㪸㫅㪾㪼
㪊㪇㫂㱅㩷㪩㪸㫅㪾㪼
㪈㪇㫂㱅㩷㪩㪸㫅㪾㪼
㪊㫂㱅㩷㪩㪸㫅㪾㪼
㪈㫂㱅㩷㪩㪸㫅㪾㪼
㪊㪇㪇㱅㩷㪩㪸㫅㪾㪼
㪈㪇㪇㱅㩷㪩㪸㫅㪾㪼
㪈㪇㱅㩷㪩㪸㫅㪾㪼
㪈㪇㱅㩷㪩㪸㫅㪾㪼
MEAS DISPLAY Page
Figure 3-4 Effective measurement range (0.2 V or 2 mA < Test signal level ≤ 2 V or 20 mA)
60Chapter 3
Display Format
㪼㪋㪐㪏㪇㪸㫌㪼㪈㪇㪈㪍
㪈㪇㪇㪪
㪈㪇㪪
㪈㪞
㪈㪇㪪
㪈㪪
㪈㪇㪇㫄㪪
㪈㪇㫄㪪
㪈㫄㪪
㪈㪇㪇㱘㪪
㪈㪇㱘㪪
㪈㱘㪪
㪈㪇㪇㫅㪪
㪈㪇㫅㪪
㪈㫅㪪
㪇
㪈㪇㫄㱅
㪈㪇㪇㫄㱅
㪈㱅
㪈㪇㱅
㪈㪇㪇㱅
㪈㫂㱅
㪈㪇㫂㱅
㪈㪇㪇㫂㱅
㪈㪤㱅
㪈㪇㪤㱅
㪈㪇㪇㪤㱅
㪈㫄㱅
㪇
㪈㪞㱅
㪈㪇㫇㪝
㪈㫅㪝
㪈㪇㪇㫇㪝
㪈㪇㫅㪝
㪈㪇㪇㫅㪝
㪈㱘㪝
㪈㪇㱘㪝
㪈㪇㪇㱘㪝
㪈㫄㪝
㪈㪇㫄㪝
㪈㪇㪇㫄㪝
㪈㪝
㪈㪇㫅㪟
㪈㫅㪟
㪈㪇㪇㫇㪟
㪈㪇㪇㫅㪟
㪈㱘㪟
㪈㪇㱘㪟
㪈㪇㪇㱘㪟
㪈㫄㪟
㪈㪇㫄㪟
㪈㪇㪇㫄㪟
㪈㪟
㪈㪇㪟
㪈㪇㪇㪟
㪈㫇㪝
㪈㪇㪇㪽㪝
㪈㪇㪽㪝
㪈㪽㪝
㪈㪇㪇㪸㪝
㪈㫂㪟
㪈㪇㫂㪟
㪈㪇㪇㫂㪟
㪈㪤㪟
㪉㪇㪈㪇㪇㪈㫂㪈㪇㫂㪈㪇㪇㫂㪈㪤 㪉㪤
㪠㫅㪻㫌㪺㫋㪸㫅㪺㪼
㪚㪸㫇㪸㪺㫀㫋㪸㫅㪺㪼
㪠㫄㫇㪼㪻㪸㫅㪺㪼
㪘㪻㫄㫀㫋㫋㪸㫅㪺㪼
㪝㫉㪼㫈㫌㪼㫅㪺㫐
㪈㪇㪇㫂㱅㩷㪩㪸㫅㪾㪼
㪊㪇㫂㱅㩷㪩㪸㫅㪾㪼
㪈㪇㫂㱅㩷㪩㪸㫅㪾㪼
㪊㫂㱅㩷㪩㪸㫅㪾㪼
㪈㫂㱅㩷㪩㪸㫅㪾㪼
㪊㪇㪇㱅㩷㪩㪸㫅㪾㪼
㪈㪇㪇㱅㩷㪩㪸㫅㪾㪼
㪈㪇㱅㩷㪩㪸㫅㪾㪼
㪈㪇㪇㫄㱅㩷㪩㪸㫅㪾㪼
㪈㪇㱅㩷㪩㪸㫅㪾㪼
MEAS DISPLAY Page
Figure 3-5 Effective measurement range (Test signal level > 2 V or 20 mA)
3. Display Format
Chapter 3 61
Display Format
㪼㪋㪐㪏㪇㪸㫌㪼㪈㪈㪍㪌
㪈㪇㪇㪪
㪈㪇㪪
㪈㪞
㪈㪇㪪
㪈㪪
㪈㪇㪇㫄㪪
㪈㪇㫄㪪
㪈㫄㪪
㪈㪇㪇㱘㪪
㪈㪇㱘㪪
㪈㱘㪪
㪈㪇㪇㫅㪪
㪈㪇㫅㪪
㪈㫅㪪
㪇
㪈㪇㫄㱅
㪈㪇㪇㫄㱅
㪈㱅
㪈㪇㱅
㪈㪇㪇㱅
㪈㫂㱅
㪈㪇㫂㱅
㪈㪇㪇㫂㱅
㪈㪤㱅
㪈㪇㪤㱅
㪈㪇㪇㪤㱅
㪈㫄㱅
㪇
㪈㪞㱅
㪈㪇㫇㪝
㪈㫅㪝
㪈㪇㪇㫇㪝
㪈㪇㫅㪝
㪈㪇㪇㫅㪝
㪈㱘㪝
㪈㪇㱘㪝
㪈㪇㪇㱘㪝
㪈㫄㪝
㪈㪇㫄㪝
㪈㪇㪇㫄㪝
㪈㪝
㪈㪇㫅㪟
㪈㫅㪟
㪈㪇㪇㫇㪟
㪈㪇㪇㫅㪟
㪈㱘㪟
㪈㪇㱘㪟
㪈㪇㪇㱘㪟
㪈㫄㪟
㪈㪇㫄㪟
㪈㪇㪇㫄㪟
㪈㪟
㪈㪇㪟
㪈㪇㪇㪟
㪈㫇㪝
㪈㪇㪇㪽㪝
㪈㪇㪽㪝
㪈㪽㪝
㪈㪇㪇㪸㪝
㪈㫂㪟
㪈㪇㫂㪟
㪈㪇㪇㫂㪟
㪈㪤㪟
㪉㪇㪈㪇㪇㪈㫂㪈㪇㫂㪈㪇㪇㫂㪈㪤 㪉㪤
㪠㫅㪻㫌㪺㫋㪸㫅㪺㪼
㪚㪸㫇㪸㪺㫀㫋㪸㫅㪺㪼
㪠㫄㫇㪼㪻㪸㫅㪺㪼
㪘㪻㫄㫀㫋㫋㪸㫅㪺㪼
㪝㫉㪼㫈㫌㪼㫅㪺㫐
㪈㪇㪇㫂㱅㩷㪩㪸㫅㪾㪼
㪊㪇㫂㱅㩷㪩㪸㫅㪾㪼
㪈㪇㫂㱅㩷㪩㪸㫅㪾㪼
㪊㫂㱅㩷㪩㪸㫅㪾㪼
㪈㫂㱅㩷㪩㪸㫅㪾㪼
㪊㪇㪇㱅㩷㪩㪸㫅㪾㪼
㪈㪇㪇㱅㩷㪩㪸㫅㪾㪼
㪈㪇㱅㩷㪩㪸㫅㪾㪼
㪈㪇㱅㩷㪩㪸㫅㪾㪼
MEAS DISPLAY Page
Figure 3-6 Effective measurement range (Test signal level ≤ 0.2 V or 2 mA)
62Chapter 3
Procedure for setting the impedance range
Step 1. Press the [Display Format] key.
Display Format
MEAS DISPLAY Page
Step 2. Press the
MEAS DISPLAY softkey.
Step 3. Use the cursor keys to select the RANGE field.
Step 4. Use the softkeys to select the impedance range mode or impedance range.
SoftkeyFunction
AUTOSets the impedance range mode to AUTO.
HOLDSets the impedance range mode to HOLD.
INCR +Increments the impedance range in the HOLD mode.
DECR -Decrements the impedance range in the HOLD mode.
Manually setting the time for the impedance range mode
Changing impedance range requires a few milliseconds to several tens of milliseconds. For
details, refer to “Settling time” on page 440 in Chapter 11, “Specifications and
Supplemental Information.”
3. Display Format
Chapter 3 63
Display Format
MEAS DISPLAY Page
Test Frequency
Test frequency point
The E4980A/AL’s test frequency can be set in the range from 20 Hz to 2 MHz. The last
digit of the four-digit test frequency display (including digits after the decimal point) can
be set as the resolution.
Table 3-7 shows the test frequency point of each frequency range (F).
Table 3-7 Frequency range and test frequency point
NOTEWhen more than five-digit numeric data (including digits after the decimal point) are
entered, the nearest test frequency point is automatically set.
Procedure for setting test frequency
Step 1. Press the [Display Format] key.
Step 2. Use the cursor keys to select the FREQ field.
Step 3. Use the softkeys or numeric entry keys to enter the test frequency. When data is entered
with the numeric entry keys, the softkeys change to unit labels (Hz, kHz, MHz).
SoftkeyFunction
INCR ++Increments the test frequency to the next sequentially higher tenfold
value after 20 Hz. Refer to Table 3-8 for the test frequency points that
can be set using this softkey.
INCR +Increments the current test frequency to the next sequentially higher
frequency point. There are ten frequency points between successive
decade values. Refer to Table 3-9 for the sequential frequency points
that can be set using this softkey.
DECR -Decreases the test frequency to the next sequentially lower frequency
point. There are ten frequency points between successive decade
values. Refer to Table 3-9 for the frequency points that can be set
using this softkey.
64Chapter 3
SoftkeyFunction
DECR --Decreases the test frequency to the next sequentially lower tenth
value after 20 Hz. Refer to Table 3-8 for the frequency points that can
be set using this softkey.
Table 3-8 Test frequency that can be set using INCR ++ / DECR --
INCR ++ / DECR --
20 Hz
100 Hz
1 kHz
10 kHz
100 kHz
1 MHz
Display Format
MEAS DISPLAY Page
2 MHz
Table 3-9 Test frequency that can be set using INCR + / DECR -
INCR + / DECR -
20 Hz100 Hz1 kHz10 kHz100 kHz1 MHz
25 Hz120 Hz1.2 kHz12 kHz120 kHz1.2 MHz
30 Hz150 Hz1.5 kHz15 kHz150 kHz1.5 MHz
40 Hz200 Hz2 kHz20 kHz200 kHz2 MHz
50 Hz250 Hz2.5 kHz25 kHz250 kHz
60 Hz300 Hz3 kHz30 kHz300 kHz
80 Hz400 Hz4 kHz40 kHz400 kHz
500 Hz5 kHz50 kHz500 kHz
600 Hz6 kHz60 kHz600 kHz
800 Hz8 kHz80 kHz800 kHz
Time required for setting the test frequency
3. Display Format
Changing the test frequency requires a few milliseconds to several tens of milliseconds.
For details, refer to “Settling time” on page 440 of Chapter 11, “Specifications and
Supplemental Information.”
Chapter 3 65
Display Format
MEAS DISPLAY Page
Test Signal Level
The E4980A/AL’s test signal level can be set as the effective value (RMS value) of a sine
wave of the test frequency from the unit’s internal oscillator. You can set either the
oscillator voltage level or the oscillator current level. The output impedance is 100 Ω.
NOTEThe set value of the oscillator current level is the value set when the measurement contacts
(UNKNOWN terminals) are shorted together.
The set value of the oscillator voltage level is the value set when the measurement contacts
(UNKNOWN terminals) are opened.
The E4980A/AL can measure a device using a constant voltage or current level by using
the automatic level control function. (The automatic level control function (ALC field) can
be set to ON from the MEAS SETUP page.) When a constant voltage or current level
measurement is performed, an asterisk mark (*) appears at the end of the LEVEL display.
For more information about the automatic level control function, refer to “Automatic level
control” on page 96.
Test signal level and resolution (Standard)
When option 001 (power/DC bias enhance) is not installed, the oscillator voltage level can
be set with a resolution listed in Table 3-10, or the oscillator current level can be set with a
resolution listed in Table 3-11.
Table 3-10 Oscillator voltage level and resolution (Std.)
Oscillator voltage levelResolution
0 Vrms to 200 mVrms100 μVrms
200 mVrms to 500 mVrms200 μVrms
500 mVrms to 1 Vrms500 μVrms
1 Vrms to 2 Vrms1 mVrms
Table 3-11 Oscillator current level and resolution (Std.)
Oscillator current level Resolution
0 Arms to 2 mArms1 μArms
2 mArms to 5 mArms2 μArms
5 mArms to 10 mArms5 μArms
10 mArms to 20 mArms10 μArms
66Chapter 3
Test signal level and resolution (Option 001)
When option 001 (power/DC bias enhance) is installed, the oscillator voltage level can be
set with a resolution listed in Table 3-12, or the oscillator current level can be set with a
resolution listed in Table 3-13.
Table 3-12 Oscillator voltage level and resolution (Option 001)
Oscillator voltage level Resolution
0 Vrms to 200 mVrms100 μVrms
200 mVrms to 500 mVrms200 μVrms
500 mVrms to 1 Vrms500 μVrms
1 Vrms to 2 Vrms1 mVrms
2 Vrms to 5 Vrms2 mVrms
5 Vrms to 10 Vrms5 mVrms
Display Format
MEAS DISPLAY Page
10 Vrms to 20 Vrms
*1.When the test frequency is more than 1 MHz, the maximum oscillator voltage level that
can be set is 15 Vrms.
*1
10 mVrms
Table 3-13 Oscillator current level and resolution (Option 001)
Oscillator current level Resolution
0 Arms to 2 mArms1 μArms
2 mArms to 5 mArms2 μArms
5 mArms to 10 mArms5 μArms
10 mArms to 20 mArms10 μArms
20 mArms to 50 mArms20 μArms
50 mArms to 100 mArms50 μArms
Test signal level setting procedure
Step 1. Press the [Display Format] key
Step 2. Press the
MEAS DISPLAY softkey.
3. Display Format
Step 3. Use the cursor keys to select the LEVEL field.
Step 4. Use the softkeys or numeric entry keys to enter the test signal level. When data is entered
with the numeric entry keys, the softkeys change to units labels (mV, V, uA, mA, A).
SoftkeyFunction
INCR ++Increases the oscillator’s output level with a resolution shown in
Table 3-14 or Table 3-15.
Chapter 3 67
Display Format
MEAS DISPLAY Page
SoftkeyFunction
INCR +Increases the oscillator’s output level with a resolution shown in
Table 3-10 to Table 3-13.
DECR -Decreases the oscillator’s output level with a resolution shown in
Table 3-10 to Table 3-13.
DECR --Decreases the oscillator’s output level with a resolution shown in
Table 3-14 or Table 3-15.
Table 3-14 Oscillator’s voltage level that can be set with INCR ++ / DECR --
INCR ++ / DECR -- (Vrms)
0,
1 m, 2 m, 3 m, •••, 9 m
10 m, 20 m, 30 m, •••, 90 m
100 m, 200 m, 300 m, •••, 900 m
1, 2, 3, •••, 9
10, 20
*1.The voltage level can be set to more than 2 V only when option 001 is
*1
*1
installed.
Table 3-15 Oscillator’s current level that can be set with INCR ++ / DECR --
INCR ++ / DECR -- (Arms)
0,
10 μ, 20 μ, 30 μ, •••, 90 μ
100 μ, 200 μ, 300 μ, •••, 900 μ
1 m, 2 m, 3 m, •••, 9 m
10 m, 20 m, 30 m, •••, 90 m
*1
100 m
*1.The current level can be set to more than 20 m only when option 001 is
installed.
*1
68Chapter 3
Display Format
MEAS DISPLAY Page
DC Bias
The E4980A/AL has an internal DC bias. A DC bias is output when the DC Bias key on the
front panel is set to ON.
The DC Bias key is a toggle-type switch used to enable DC bias output. When you press
the DC Bias key,
bias is ON (orange). When you press the DC Bias key again,
status display area and the LED indicator is OFF. If the DC Bias key is set to OFF, the
setting value for the DC bias is not output even though the DC bias is set to ON in the
BIAS field.
The setting value of the DC bias signal voltage is the value set when the measurement
contacts (UNKNOWN terminals) are opened.
The setting value of the DC bias signal current is the value set when the measurement
contacts (UNKNOWN terminals) are shorted.
The range of the DC bias has two types: AUTO and FIX. When the E4980A/AL is initiated
or preset, AUTO is set. The following descriptions are effective when AUTO is set as a
range. Use the SCPI command to fix the range. For details, refer to
“:BIAS:RANGe:AUTO” on page 323.
DCBIAS appears in the status display area and the LED indicator for DC
DCBIAS disappears from the
DC bias (Standard)
When option 001 (power/DC bias enhance) is not installed, the DC bias can be set with a
resolution listed in Table 3-16. The level of the DC bias signal current cannot be set
without option 001 present.
Table 3-16 DC bias and resolution (Std.)
DC bias signal voltageDC bias signal current
0 V, 1.5 V, 2.0 Vunavailable
DC bias and resolution (Option 001)
When option 001 (power/DC bias enhance) is installed, the DC bias signal voltage and
signal current can be set with a resolution listed in Table 3-17 or Table 3-18.
Table 3-17 DC bias and resolution (Option 001)
DC bias signal voltage levelResolution
± (0 V to 5 V)
± (5 V to 10 V)1 mV
± (10 V to 20 V)2 mV
100 μV
3. Display Format
*1
± (20 V to 40 V)5 mV
*1.Effective resolution is 330 μV.
Chapter 3 69
Display Format
㪼㪋㪐㪏㪇㪸㫌㪼㪈㪇㪈㪎
㪈㪇㪇㱅
㪟㪠㪞㪟㪣㪦㪮
㪛㪚㩷㪙㪠㪘㪪
㪚㪬㪩㪩㪜㪥㪫
㪪㪿㫆㫉㫋㪼㪻
MEAS DISPLAY Page
Table 3-18 DC bias and resolution (Option 001)
DC bias signal current levelResolution
± (0A to 50 mA)
± (50 mA to 100 mA)10 μA
*1.Effective resolution is 3.3 μA.
When a DUT is connected to the measurement contacts, the setting current value is
different from the actual current passing through the DUT. For normal measurement taken
by applying the signal current through a device, refer to “DC Bias Current Isolation” on
page 100.
Figure 3-7 DC bias signal current
1 μA
*1
Setting limits for DC bias and test signal level
When both the DC bias and the test signal level are set under the following conditions, the
amount of DC bias plus the test signal level is limited to the values listed in Table 3-19
•Option 001 is installed.
•The DC Bias key on the front panel is set to ON.
Table 3-19 DC bias and test signal level-setting limits
Step 3. Use the cursor keys to select the BIAS field.
Step 4. Use the softkeys or numeric entry keys to enter the test signal level. When data is entered
with the numeric entry keys, the softkey labels are changed to the appropriate unit labels
( m V, V, u A, m A , A ).
SoftkeyFunction
INCR ++Increases the oscillator’s output level with a resolution shown in
Table 3-20 or Table 3-21.
INCR +Increases the oscillator’s output level with a resolution shown in
Table 3-16 to Table 3-18.
DECR -Decreases the oscillator’s output level with a resolution shown in
Table 3-16 to Table 3-18.
DECR --Decreases the oscillator’s output level with a resolution shown in
Table 3-20 or Table 3-21.
Table 3-20 DC bias signal voltage that can be set with INCR ++ / DECR --
INCR ++ / DECR -- (V)
*1
3. Display Format
0,
±100 μ, ±200 μ, ±300 μ, •••, ±900 μ
±1 m, ±2 m, ±3 m, •••, ±9 m
±10 m, ±20 m, ±30 m, •••, ±90 m
±100 m, ±200 m, ±300 m, •••, ±900 m
±1, ±2, ±3, •••, ±9
±10, ±20, ±30, ±40
*1.When option 001 is not installed, only 0 V, 1.5 V, and 2.0 V can be set.
Table 3-21 DC bias signal current that can be set with INCR ++ / DECR
INCR ++ / DECR -- (A)
0,
±1 μ, ±2 μ, ±3 μ, •••, ±9 μ
±10 μ, ±20 μ, ±30 μ, •••, ±90 μ
±100 μ, ±200 μ, ±300 μ, •••, ±900 μ
*1
Chapter 3 71
Display Format
MEAS DISPLAY Page
Table 3-21 DC bias signal current that can be set with INCR ++ / DECR
INCR ++ / DECR -- (A)
*1
±1 m, ±2 m, ±3 m, •••, ±9 m
±10 m, ±20 m, ±30 m, •••, ±90 m
±100 m
*1. This cannot be set when option 001 is not installed.
Step 5. Press [DC Bias] to set the DC bias output to ON. DCBIAS appears in the status display area
and the LED indicator for DC bias lights up in orange.
Settling time for the DC bias signal voltage
Changing the DC bias requires a few milliseconds to several tens of milliseconds. For
details, refer to “DC bias settling time” on page 450 of Chapter 11, “Specifications and
Supplemental Information.”
72Chapter 3
Measurement Time Mode
Three measurement time modes (SHORT, MEDIUM, LONG) can be selected for the
E4980A/AL. A longer measurement time will result in more stable and accurate
measurement results. Refer to “Measurement time” on page 441 For details on the
measurement time of each measurement time mode.
Procedure for setting measurement time mode
Step 1. Press the [Display Format] key.
Display Format
MEAS DISPLAY Page
Step 2. Press the
MEAS DISPLAY softkey.
Step 3. Use the cursor keys to select the MEAS TIME field.
Step 4. Use the softkeys to set the measurement time.
SoftkeyFunction
SHORTShortens the measurement time
MEDSets the measurement time between SHORT and LONG
LONG Lengthens the measurement time
3. Display Format
Chapter 3 73
Display Format
MEAS DISPLAY Page
Display Setting for Measurement Results
The E4980A/AL can set the display digits and display units for measurement results
(primary parameter/secondary parameter). For measurement parameters whose “setting
available?” column is No in Table 3-22, the display setting cannot be changed. For
measurement parameters whose display digit can be set to AUTO or FIXED, generally
AUTO is selected. Regarding the display range for measurement values, refer to
“Measurement display ranges” on page 407 of Chapter 11, “Specifications and
Supplemental Information.”
Table 3-22 shows the digits and units that can be set for each measurement parameter.
Under certain conditions, a message will be displayed instead of measurement results. For
details, refer to “Displaying Errors instead of Measurement Results” on page 76
Table 3-22 Display Settings for Measurement Results
Step 3. Use the cursor keys to select the field in which a measurement result of primary parameter
or secondary parameter is displayed.
Step 4. Use the following softkeys to set the display.
74Chapter 3
MEAS DISPLAY softkey.
SoftkeyFunction
㪼㪋㪐㪏㪇㪸㫌㫁㪈㪈㪍㪈
D.P. AUTOAutomatically displays the appropriate digits and units
D.P FIXDisplays measurement data using a fixed-point display format. In
this case, is displayed at the fixed decimal point. (refer to Figure
3-8).
D.P POS INCR +Moves the decimal point to the left. Supplementary units are also
changed.
D.P POS DECL -Moves the decimal point to the right. Supplementary units are also
changed.
Figure 3-8 Fixed-display sample of a measurement result
Display Format
MEAS DISPLAY Page
3. Display Format
Chapter 3 75
Display Format
MEAS DISPLAY Page
Displaying Errors instead of Measurement Results
Under certain conditions, the following message will appear instead of the measurement
results. A description of each message is provided below.
Error messages
MessageDescription
OVERLOADThis message appears when overload occurs. The returned value is
“9.9E37” when using the SCPI command. Conditions in which
overload occurs differ depending on the impedance range settings.
For details, refer to Table 3-26 on page 78.
---This appears when no measurement was performed, or the
measurement result is beyond the display range.
INFINITYThis message appears when the deviation mode of the deviation
measurement function is % and the measurement result cannot be
calculated.
Conditions where overload occurs for impedance measurement
Conditions differ depending on the impedance range setting (RANGE field).
HOLDConditions differ depending on the impedance range. Refer to Tabl e
Conditions
•When the DUT’s distortion is large
•When the DUT’s response is slow
3-23
Table 3-23 Overload range when the impedance range is in the HOLD state for
impedance measurement
Impedance range
(Ω) (RANGE field)
0.10 to 0.11more than 0.11
10 to 1.1more than 1.1
100 to 11more than 11
Measurable rangeRange in which overload occurs
1000 or moren.a.
300270 or moreless than 270
1 k900 or moreless than 900
3 k2700 or moreless than 2700
76Chapter 3
Display Format
MEAS DISPLAY Page
Table 3-23 Overload range when the impedance range is in the HOLD state for
impedance measurement
Impedance range
(Ω) (RANGE field)
10 k9,000 or moreless than 9,000
30 k27,000 or moreless than 27,000
100 k90,000 or moreless than 90,000
Conditions where overload occurs for DCR measurement
Conditions differ depending on the DCR impedance-range setting (DCR RNG field).
Impedance
range
AUTOWhen the E4980A/AL’s internal detector detects overload
HOLDConditions differ depending on the impedance range. Refer to Tabl e
Conditions
3-24
Measurable rangeRange in which overload occurs
Table 3-24 Overload range when the impedance range is in the HOLD state for DCR
measurement
Impedance range (Ω)
(DCR RNG field)
Measurable rangeRange in which overload
occurs
3. Display Format
100 to 11more than 11
1000 or moren.a.
1 k900 or moreless than 900
10 k9,000 or moreless than 9,000
100 k90,000 or moreless than 90,000
Conditions in which overload occurs for Vdc-Idc measurement (DC source-level
monitor)
Conditions differ depending on the Idc impedance range setting (DCI RNG field).
Impedance
range
AUTO•When the measurement value exceeds 125 mA
HOLDConditions differ depending on the impedance range. Refer to Tabl e
Conditions
•When the E4980A/AL’s internal detector detects overload
3-25
Chapter 3 77
Display Format
MEAS DISPLAY Page
NOTEOverload does not occur for Vdc measurement.
Table 3-25 Overload range when the impedance range is in the HOLD state for Idc
measurement
Impedance range (A)
(DCI RNG field)
Measurable rangeRange inn which overload
occurs
20 μ0 to 22 μmore than 22 μ
200 μ0 to 220 μmore than 220 μ
2 m0 to 2.2 mmore than 2.2 m
20 m0 to 22 mmore than 22 m
100 m0 to 110 mmore than 110 m
List of measurement results when overload occurs.
This section describes measurement results and each monitor value when overload occurs.
The bold font in the list indicates the measurement parameter for which overload occurs.
“*” indicates that measurement results, judgement, and BIN count are normal.
Table 3-26 List of measurement results when overload occurs
Measurement
parameter
Impedance
measurement (except
for Ls/Lp-Rdc)
Meas. value
(primary)
OVLDOVLD---------LOUT
Meas. value
(secondary)
VA C / I A C
monitor
VDC
monitor
IDC
monitor
IN/
OUT
BIN
No.
Impedance
OVLD
OVLD---------LOUT
measurement (except
for Ls/Lp-Rdc)
Impedance
OVLD------------LOUT
measurement
(Ls/Lp-Rdc)
DCR measurement
*
OVLD***LOUT
(Ls/Lp-Rdc)
Vdc-Idc
*
OVLD0*OVLDLOUT
measurement
Other than Vdc-Idc
***
OVLD---**
measurement
Other than Vdc-Idc
****
measurement
NOTEOVLD is displayed as OVERLOAD on the display.
78Chapter 3
OVLD**
Display Format
MEAS DISPLAY Page
Monitor Information
The following describes monitor information displayed on the MEAS DISPLAY page.
This information cannot be changed on the MEAS DISPLAY page.
Monitor
Description
information
VACDisplays the test signal voltage level (AC voltage). Displays
measurement results regardless of the type of measurement parameter
IACDisplays the test signal current level (AC current). Displays
measurement results regardless of the type of measurement parameter
VDCDisplays the DC bias voltage level (DC voltage). Set the VDC MON
field of the [Means Setup] page to ON when you want to display it.
*1
IDCDisplays the DC bias current level (DC current). Set the IDC MON
field of the [Means Setup] page to ON when you want to display it
CORRDisplays the correction information of enabled correction types
(OPEN/SHORT/LOAD) and cable length
CH
*1.This can be displayed only when option 001 is installed.
*2.SINGLE is displayed when option 301 is not installed.
Displays the channel number in the multi-correction mode
*2
NOTEThe VDC/IDC monitor values are the ones measured under the condition that the setting
value of the test signal level (LEVEL field) is output. Therefore, these values are different
from the measurement results displayed when the measurement parameter is DC voltage
measurement/DC current measurement (Vdc-Idc).
3. Display Format
Chapter 3 79
Display Format
BIN NO. DISPLAY Page
BIN NO. DISPLAY Page
When you press the [Display Format] key and BIN No. soft key, the BIN No. DISPLAY
page appears. The bin sorting results are displayed in large characters while the
measurement results are shown in normal characters. The following measurement controls
can be set from the BIN No. DISPLAY page (The field in parenthesis is used when this
control is set).
•Comparator function ON/OFF (COMP field)
This page also provides the following information in the monitor areas (each monitor area
looks like a field but is not). These conditions can be set from the MEAS SETUP page and
the CORRECTION page, and most conditions can be set from the MEAS DISPLAY page.
•Measurement Function (FUNC)
•Impedance range (RANGE)
•Test Frequency (FREQ)
•Test Signal Level (LEVEL)
•DC Bias (BIAS)
•Measurement Time Mode (MEAS TIME)
•Correction Information (CORR)
Figure 3-9 shows the available fields and the softkeys that correspond to each field on this
page.
80Chapter 3
Figure 3-9 BIN NO. DISPLAY page
㪼㪋㪐㪏㪇㪸㫌㪼㪈㪇㪍㪋
㪑㩷㩷㪝㫀㪼㫃㪻
㪑㩷㩷㪤㫆㫅㫀㫋㫆㫉
㪙㪠㪥㩷㪪㫆㫉㫋㫀㫅㪾
㪩㪼㫊㫌㫃㫋㫊
㪤㪼㪸㫊㫌㫉㪼㫄㪼㫅㫋
㪩㪼㫊㫌㫃㫋㫊
Display Format
BIN NO. DISPLAY Page
Comparator Function ON/OFF
The E4980A/AL’s built-in comparator can sort devices into a maximum of ten bins (BIN 1
to BIN 9 and the OUT OF BIN) using a maximum of nine pairs of primary parameter
limits and one pair of secondary parameter limits. Also, a device whose primary parameter
is within limits, but whose secondary parameter measurement result is not, can be sorted
into an auxiliary BIN (AUX BIN). To control a component handler using the comparator
function, it is necessary to install option 201.
These limits settings for bin sorting are set on the LIMIT TABLE page from the [MEAS
SETUP] key (refer to Chapter 4). Therefore, this COMP field allows you to only set the
comparator function to ON or OFF.
Procedure for setting the comparator function
Step 1. Press the [Display Format] key.
Step 2. Press the
Step 3. Use the cursor keys to select the COMP field.
BIN No. softkey.
3. Display Format
Step 4. Use the softkeys to set the comparator function to ON or OFF.
SoftkeyFunction
ONSets the comparator to ON
OFFSets the comparator to OFF
Chapter 3 81
Display Format
㪑㩷㩷㪝㫀㪼㫃㪻
㪑㩷㩷㪤㫆㫅㫀㫋㫆㫉
BIN COUNT DISPLAY Page
BIN COUNT DISPLAY Page
When you press the [Display Format] key and BIN COUNT softkey, the BIN COUNT
DISPLAY page is displayed. On this page, the comparator’s count results are displayed
(The field in parentheses is used for setting).
•Counter function ON/OFF (COUNT field)
This page also provides the following information in the monitor areas (each monitor area
looks like a field, but is not). These conditions can be set from the LIMIT TABLE SETUP
page. For more details, refer to “LIMIT TABLE SETUP Page” on page 133.
•Measurement Function (FUNC)
•Nominal Value (NOM)
•Test Frequency (FREQ)
•Bin Sorting Low/High Limits (LOW/HIGH)
•BIN Sorting Results (RESULT)
Figure 3-10 shows the available fields and the softkeys that correspond to each field on this
page.
You can set it so that a beep sounds when the sorting result is output. For details, refer to
“Beep Feature” on page 142.
Figure 3-10 BIN COUNT DISPLAY Page
㪼㪋㪐㪏㪇㪸㫌㪼㪈㪇㪍㪌
82Chapter 3
Counter Function
The E4980A/AL is capable of counting bins. The number of devices sorted into each bin is
counted while the unit sorts the devices into appropriate bins using the comparator
function.
The maximum count is 999,999. The counting operation stops and the overflow message “
----” appears when this value is reached.
Counter setting procedure
Step 1. Press the [Display Format] key.
Display Format
BIN COUNT DISPLAY Page
Step 2. Press the
BIN COUNT softkey.
Step 3. Use the cursor keys to select the COUNT field.
Step 4. Use the softkeys to set the counter to ON/OFF.
SoftkeyFunction
COUNT ONSets the counter to ON
COUNT OFFSets the counter to OFF
Counter reset procedure
Step 1. Press the [Display Format] key.
Step 2. Press the
BIN COUNT softkey.
Step 3. Use the cursor keys to select the COUNT field.
Step 4. Use the softkeys to press
RESET COUNT.
NOTEThe counter is reset when the instrument setting state is recalled.
3. Display Format
Chapter 3 83
Display Format
㪼㪋㪐㪏㪇㪸㫌㪼㪈㪇㪍㪎
㪤㪼㪸㫊㫌㫉㪼㫄㪼㫅㫋
㪩㪼㫊㫌㫃㫋㫊
㪚㫆㫄㫇㪸㫉㫀㫊㫆㫅㩷㪩㪼㫊㫌㫃㫋㫊㩷㫆㪽
㪣㫀㫊㫋㩷㪪㫎㪼㪼㫇㩷㪤㪼㪸㫊㫌㫉㪼㫄㪼㫅㫋
㪑㩷㩷㪝㫀㪼㫃㪻
㪑㩷㩷㪤㫆㫅㫀㫋㫆㫉
LIST SWEEP DISPLAY Page
LIST SWEEP DISPLAY Page
When you press the [Display Format] key and LIST SWEEP softkey, the LIST SWEEP
DISPLAY page appears. On this page in is possible to enter sweep points and measurement
limits of up to 201 frequencies, test signal levels, DC bias, or DC source. The sweep points
are automatically swept and the measurement results are compared to the limits.
On the LIST SWEEP DISPLAY page, the sweep points are swept and the measurement
results are compared to the limits. During a sweep, an asterisk mark (*) will appear on the
left side of the sweep point currently being measured. The following measurement controls
can be set from this page (Each field in parentheses is used for setting).
•Sweep Mode of the List Sweep Measurement (MODE)
•Confirmation for Each Page of the List Sweep Measurement (No. of fields)
The sweep point list cannot be set from this page; it can only be set from the LIST SWEEP
SETUP page.
Figure 3-11 shows the available fields and the softkeys that correspond to each field on this
page.
You can set it so that a beep sounds when the sorting result is output. For details, refer to
“Beep Feature” on page 142.
Figure 3-11 LIST SWEEP DISPLAY Page
84Chapter 3
Sweep Mode
㪼㪋㪐㪏㪇㪸㫌㪼㪈㪇㪍㪍
㪫㫉㫀㪾㪾㪼㫉
㪪㪜㪨㩷㫄㫆㪻㪼
㪫㫀㫄㪼
㪪㫎㪼㪼㫇
㪧㪸㫉㪸㫄㪼㫋㪼㫉
㪫㫉㫀㪾㪾㪼㫉
㪫㫉㫀㪾㪾㪼㫉㪫㫉㫀㪾㪾㪼㫉
㪪㪫㪜㪧㩷㫄㫆㪻㪼
㪫㫀㫄㪼
㪪㫎㪼㪼㫇
㪧㪸㫉㪸㫄㪼㫋㪼㫉
The E4980A/AL’sf unction for list sweep measurement permits up to 201 test frequencies,
test signal levels, DC bias, or DC source to be automatically measured. There are two
measurement methods for list sweep measurements: sequential (SEQ) mode and step
(STEP) mode. In the case of SEQ mode, when the E4980A/AL is triggered once, all sweep
points are automatically swept. In the case of STEP mode, each time the E4980A/AL is
triggered, the sweep points are swept one by one.
Procedure for setting sweep modes
Step 1. Press the [Display Format] key.
Display Format
LIST SWEEP DISPLAY Page
Step 2. Press the
LIST SWEEP softkey.
Step 3. Use the cursor keys to select the MODE field.
Step 4. Use the softkeys to select the sweep mode.
SoftkeyFunction
SEQWhen the E4980A/AL is triggered once, all sweep points are swept
STEPEach time the E4980A/AL is triggered, the sweep points are swept
one by one
Figure 3-12 Sequential mode and step mode
3. Display Format
NOTEWhen two or more sweep points are the same and are adjacent, the E4980A/AL measures
all of the listed points, and then compares the measurement result to limits set for each
sweep point.
Procedure to confirm the sweep points
Step 1. Press the [Display Format] key.
Step 2. Press the
LIST SWEEP softkey.
Step 3. Use the cursor keys to select the No. of fields.
Chapter 3 85
Display Format
LIST SWEEP DISPLAY Page
Step 4. Use the softkeys to confirm the sweep points on each page.
SoftkeyFunction
PREV PAGEDisplays the previous page
NEXT PAGEDisplays the next page
86Chapter 3
Display Format
㪼㪋㪐㪏㪇㪸㫌㫁㪈㪇㪍㪏
DISPLAY BLANK Page
DISPLAY BLANK Page
When you press the [Display Format] key and then press the DISPLAY BLANK softkey, the
screen switches to the non-display state. In this state, measurement time decreases because
the screen is not updated. For more on display time, refer to “Display time” on page 445 of
Chapter 11, “Specifications and Supplemental Information.”
Press the
DISPLAY NORMAL softkey to return to the normal screen.
Figure 3-13 shows the DISPLAY BLANK page.
Figure 3-13 DISPLAY BLANK page
3. Display Format
NOTEThe LCD backlight cannot be turned off.
Keys other than the
DISPLAY NORMAL softkey are not available.
Even when the screen is in the non-display state and the front panel keys are unavailable
(UNLOCK state), the DISPLAY NORMAL key is available.
Chapter 3 87
Display Format
DISPLAY BLANK Page
88Chapter 3
4 Configuring Measurement Conditions
(Display and Function Related Settings)
This chapter provides information on the various settings accessible through the MEAS
SETUP page of the E4980A/AL.
4. Configuring Measurement
Conditions
89
Configuring Measurement Conditions (Display and Function Related Settings)
Initializing the Instrument
Initializing the Instrument
The E4980A/AL can be initialized into one of the following four default states:
Table 4-1 Three default states of E4980A/AL and how it is initialized
Default stateHow the instrument is initialized
CLEAR SETTINGWhen you initialize the instrument into this state, all basic
parameters configurable through the front panel and SCPI
commands are cleared. (You get the same result by issuing the
*RST command).
CLEAR
SET&CORR
FACTO RY
DEFAULT
LAN RESETWhen you initialize the instrument into this state, the LAN
*1.It takes a few seconds for the initialization to complete.
For more information on each default state and affected settings, see Appendix C, “List of
Default Values,” on page 479.
When you initialize the instrument into this state, calibration
data and backup items listed in the initial setting list are all
*1
cleared.
:SYST:PRES command).
When you initialize the instrument into this state, it reverts to
factory default settings with all user-configurable data cleared.
setting is returned to the factory default state.
(You can gain the same result by issuing the
90Chapter 4
Configuring Measurement Conditions (Display and Function Related Settings)
MEAS SETUP page
MEAS SETUP page
You can press the [Meas Setup] key to open the MEAS SETUP page. In the MEAS SETUP
page, you can configure each of the following measurement controls with the cursor placed
in the corresponding field (denoted in parentheses).
•Comment line (USER COMMENT field)
•Measurement function (FUNC field)
•Measurement range (RANGE field)
•Measurement frequency (FREQ field)
•DC bias (BIAS field)
•Measurement signal level (LEVEL field)
•Measurement time mode (MEAS TIME field)
•Trigger mode (TRIG field)
•averaging factor (AVG field)
•Automatic level control (ALC field)
•Signal voltage level monitor ON/OFF (VDC MON field)
•DC resistance range (DCR RNG field)
•Signal current level monitor ON/OFF (IDC MON field)
•Bias current isolation (DCI ISO field)
•Trigger delay time (TRIG DLY field)
•DC current (DCI) range (DCI RNG field)
•Step delay time (STEP DLY field)
•DC source (DC SRC field)
•Automatic bias polarity control (BIAS POL)
•Deviation measurement mode A (DEV A field)
•Reference value for deviation measurement mode A (REF A field)
•Deviation measurement mode B (DEV B field)
•Reference value for deviation measurement mode B (REF B field)
The following fields are accessible through both the MEAS SETUP and MEAS DISPLAY
pages:
•Measurement function (FUNC field)
4. Configuring Measurement
Conditions
•Measurement range (RANGE field)
•Measurement frequency (FREQ field)
•DC bias (BIAS field)
•Measurement signal level (LEVEL field)
•Measurement time mode (MEAS TIME field)
Chapter 4 91
Configuring Measurement Conditions (Display and Function Related Settings)
㪼㪋㪐㪏㪇㪸㫌㪼㪈㪇㪍㪐
㪑㩷㩷㪝㫀㪼㫃㪻
MEAS SETUP page
For more information on the fields listed above, refer to the description in Chapter 3,
“Display Format.” The following sections gives descriptions on the fields that are only
accessible through the MEAS SETUP.
Figure 4-1 shows the fields available on this page along with the softkeys corresponding to
them.
Figure 4-1 MEAS SETUP page
92Chapter 4
Configuring Measurement Conditions (Display and Function Related Settings)
MEAS SETUP page
Comment line
You can enter a comment in the comment line by using the softkeys to enter letters and the
entry keys to enter numbers from 0 through 9, +, -, and period (.). Your entered comment is
saved in the internal memory or external USB memory along with the control settings of
the E4980A/AL. When you load the control settings, your saved comment is loaded as
well.
The comment can be up to 30 characters in length. However, only the first 22 characters
are displayed in the area.
Until you enter a comment into the comment line, the default text “USER COMMENT”
appears in the comment line.
NOTEYou can also use the DISPlay:LINE command to enter ASCII characters into the comment
line.
To enter a comment into the comment line:
Step 1. Press [Meas Setup].
Step 2. Press the
MEAS SETUP softkey.
Step 3. Using the cursor keys, select the USER COMMENT field.
NOTEIf there is already a comment, select that comment (field).
Step 4. To input a letter, use the following softkeys to cycle through letters in alphabetical order
and then select your desired letter:
SoftkeyDescription
NEXTDisplays the next letter to the letter currently displayed in the ADD
CHAR
softkey.
PREVDisplays the previous letter to the letter currently displayed in the
ADD CHAR softkey.
NOTETo input a number, use the entry keys.
Step 5. Press the
ADD CHAR softkey.Your selected single character appears in the input line area.
Step 6. Repeat Step 4 and Step 5 to input subsequent characters.
Step 7. Press the
ENTER softkey to enter your text in the USER COMMENT field.
4. Configuring Measurement
Conditions
Chapter 4 93
Configuring Measurement Conditions (Display and Function Related Settings)
MEAS SETUP page
Trigger mode
Functional Description
The E4980A/AL supports four trigger modes: INT (internal), EXT (external), MAN
(manual), and BUS (GPIB bus).
For more on the E4980A/AL’s trigger system, see “Trigger System” on page 253 in
Chapter 8, “Overview of Remote Control.”
Trigger modeDescription
INTAfter you bring up the display page using the [Display Format]
key, the instrument continuously repeats the measurement cycle.
MANAfter you bring up the display page using the [Display Format]
key, the instrument performs one cycle of measurement each time
you press the [Trigger] key.
EXTAfter you bring up the display page using the [Display Format]
key, the instrument performs one cycle of measurement each time
a rising TTL pulse is input to the external trigger input terminal on
the rear panel. In the EXT (external trigger) mode, you can also
trigger the instrument by short-circuiting the core wire of the
external trigger input terminal and the instrument’s ground line
(the core wire is connected to a circuit that contains a pull-up
resistor). Figure 4-2 shows the TTL pulse specifications.
Also, you can trigger the instrument from the handler interface or
scanner interface.
BUSThe E4980A/AL performs one cycle of measurement each time it
receives a trigger command sent via GPIB/USB/LAN.
NOTEE4980A/AL ignores any trigger that is input during a measurement cycle. Be sure to
trigger the instrument when it is not in a measurement cycle.
94Chapter 4
Configuring Measurement Conditions (Display and Function Related Settings)
㪫㫇
㪠㫅㫇㫌㫋㩷㪭㫆㫃㫋㪸㪾㪼䋺㩷㪉㪅㪇㩷㪭㩷
㪓㩷㪭㪠㪟㩷㻡㩷㪌㪅㪇㩷㪭
㩷㩷㪇㩷㪭㩷
㻡㩷㪭㪠㪣㩷㪓㩷㪇㪅㪌㩷㪭
㪠㫅㫇㫌㫋㩷㪚㫌㫉㫉㪼㫅㫋䋺㩷㪤㪸㫏㪅䇭㪇㪅㪈㩷㫄㪘㩷㩿㪗㪭
㪠㪟㩷㪔㩷㪌㪅㪇㩷㪭㪀
㩷㩷㪤㪸㫏㪅䇭㪄㪇㪅㪌㩷㫄㪘㩷㩿㪗㪭
㪠㪣㩷㪔㩷㪇㪅㪋㩷㪭㪀
㪧㫌㫃㫊㪼㩷㪮㫀㪻㫋㪿䋺㩷㪫㫇㩷
㻢㩷㪈㩷㱘㫊
㪭
㪠㪟
㪭㪠㪣
Figure 4-2 External trigger pulse
㪼㪋㪐㪏㪇㪸㫌㪼㪈㪇㪋㪍
To choose a trigger mode:
MEAS SETUP page
Step 1. Press [Meas Setup].
Step 2. Using the cursor keys, select the TRIG field.
Step 3. Select your desired trigger mode by pressing the appropriate softkey:
SoftkeyDescription
INTPuts the instrument into internal trigger (INT) mode.
MANPuts the instrument into manual trigger (MAN) mode.
EXTPuts the instrument into external trigger (EXT) mode.
BUSPuts the instrument into bus mode.
4. Configuring Measurement
Conditions
Chapter 4 95
Configuring Measurement Conditions (Display and Function Related Settings)
MEAS SETUP page
Automatic level control
Functional Description
The automatic level control (ALC) feature adjusts the voltage across the DUT to the same
level as the signal voltage level setting or the current across the DUT to the same level as
the signal current level setting. Using this feature, you can maintain a constant level
(voltage or current) of measurement signals applied to the DUT.
The automatic level control feature uses a monitorable feedback circuit, as shown in Figure
4-3, to iterate a feedback loop that consists of level measurement and level change, two to
nine times every measurement cycle. (The time required for level adjustment depends on
how many times the feedback loop is iterated (the value “n”) and, in turn, the value “n”
depends on the characteristics of the DUT. Generally, the higher the DUT’s non-linearity,
the longer the level adjustment time.)
If the automatic level control feature fails to complete the level adjustment after it has
iterated the feedback loop (level measurement and level change) nine times, it becomes
*1
inactive
signal input level is made equal to the specified level, and the signal output level is made
equal to the output level with the automatic level control feature turned off.
and the warning message “ALC unable to regulate” appears. In this case, the
The time required for the automatic level control feature to complete the adjustment can be
determined based on the following formula:
When the measurement range is set to HOLD, (measurement time + test signal voltage
setting time) ∞ n,
where n = 2 (min)
n = 9 (max)
NOTEFor more on the test signal voltage setting time, refer to Table 11-31 on page 440 of
Chapter 11, “Specifications and Supplemental Information,”.
*1.If the DUT has a very high linearity, the automatic level control feature may turn inactive
before it enters the 9th iteration of the feedback loop of the level measurement cycle and the
level may change.
96Chapter 4
Configuring Measurement Conditions (Display and Function Related Settings)
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㪝㪼㪼㪻㪹㪸㪺㫂㩷㪣㫆㫆㫇
Figure 4-3 Feedback Circuit
MEAS SETUP page
NOTEWhen test signal level is set close to 2 Vrms/20 mArms or 20 Vrms/100 mArms or less then
Figure 4-4 shows the working ranges of the automatic level control feature. In the charts,
solid lines denote the ranges that apply when the DUT is a resistor, while broken lines
denote the ranges for a capacitor or inductor.
5 mVrms, the warning message “ALC unable to regulate” may appear.
4. Configuring Measurement
Conditions
Chapter 4 97
Configuring Measurement Conditions (Display and Function Related Settings)
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MEAS SETUP page
Figure 4-4 Working ranges of the automatic level control feature
98Chapter 4
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