Keysight Technologies 16065C Operation And Service Manual (2025)

Operation and

Service Manual

Keysight 16065C External Bias Adapter

-

Notices

© Keysight Technologies

1991 - 2019

No part of this manual may be repro-

duced in any form or by any means

(including electronic storage and

retrieval or translation into a foreign

language) without prior agreement

and written consent from Keysight

Technologies, Inc. as governed by

United States and international

copyright laws.

Manual Part Number

16065-90020

Edition

Edition 3, August 23, 2019

Printed in Malaysia

Published by:

Keysight Technologies International

Japan G.K,

1-3-3 Higashikawasaki-cho

Chuo-ku

Kobe-shi, Hyogo, Japan

Warranty

THE MATERIAL CONTAINED IN THIS

DOCUMENT IS PROVIDED “AS IS,”

AND IS SUBJECT TO BEING

CHANGED, WITHOUT NOTICE, IN

FUTURE EDITIONS. FURTHER, TO

THE MAXIMUM EXTENT PERMITTED

BY APPLICABLE LAW, KEYSIGHT

DISCLAIMS ALL WARRANTIES,

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REGARD TO THIS MANUAL AND

ANY INFORMATION CONTAINED

HEREIN, INCLUDING BUT NOT LIM-

ITED TO THE IMPLIED WARRANTIES

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NESS FOR A PARTICULAR PUR-

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AGES IN CONNECTION WITH THE

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MANCE OF THIS DOCUMENT OR

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TERMS COVERING THE MATERIAL

IN THIS DOCUMENT THAT CON-

FLICT WITH THESE TERMS, THE

WARRANTY TERMS IN THE SEPA-

RATE AGREEMENT WILL CONTROL.

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The hardware and/or software

described in this document are fur-

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Declaration of Conformity

Declarations of Conformity for this

product and for other Keysight prod-

ucts may be downloaded from the

Web. Go to http://www.key-

sight.com/go/conformity. You can

then search by product number to

find the latest Declaration of Confor-

mity.

U.S. Government Rights

The Software is “commercial com-

puter software,” as defined by Fed-

eral Acquisition Regulation (“FAR”)

2.101. Pursuant to FAR 12.212 and

27.405-3 and Department of Defense

FAR Supplement (“DFARS”)

227.7202, the U.S. government

acquires commercial computer soft-

ware under the same terms by which

the software is customarily provided

to the public. Accordingly, Keysight

provides the Software to U.S. gov-

ernment customers under its stan-

dard commercial license, which is

embodied in its End User License

Agreement (EULA), a copy of which

can be found at http://www.key-

sight.com/find/sweula

. The license

set forth in the EULA represents the

exclusive authority by which the U.S.

government may use, modify, dis-

tribute, or disclose the Software. The

EULA and the license set forth

therein, does not require or permit,

among other things, that Keysight:

(1) Furnish technical information

related to commercial computer soft-

ware or commercial computer soft-

ware documentation that is not

customarily provided to the public; or

(2) Relinquish to, or otherwise pro-

vide, the government rights in

excess of these rights customarily

provided to the public to use, modify,

reproduce, release, perform, display,

or disclose commercial computer

software or commercial computer

software documentation. No addi-

tional government requirements

beyond those set forth in the EULA

shall apply, except to the extent that

those terms, rights, or licenses are

explicitly required from all providers

of commercial computer software

pursuant to the FAR and the DFARS

and are set forth specifically in writ-

ing elsewhere in the EULA. Keysight

shall be under no obligation to

update, revise or otherwise modify

the Software. With respect to any

technical data as defined by FAR

2.101, pursuant to FAR 12.211 and

27.404.2 and DFARS 227.7102, the

U.S. government acquires no greater

than Limited Rights as defined in FAR

27.401 or DFAR 227.7103-5 (c), as

applicable in any technical data.

Safety Notices

A CAUTION notice denotes a haz-

ard. It calls attention to an oper-

ating procedure, practice, or the

like that, if not correctly per-

formed or adhered to, could

result in damage to the product

or loss of important data. Do not

proceed beyond a CAUTION

notice until the indicated condi-

tions are fully understood and

met.

A WARNING notice denotes a haz-

ard. It calls attention to an oper-

ating procedure, practice, or the

like that, if not correctly per-

formed or adhered to, could

result in personal injury or death.

Do not proceed beyond a WARN-

ING notice until the indicated

conditions are fully understood

and met.

Contents

Keysight 16065C External Bias Adapter 3

1. General Information

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Using the 16065C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Accessories Supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Operating and Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2. Operating and Safety Precautions

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Environmental Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Operating and Storage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Connecting the Adapter for Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Repackaging the Adapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3. Operation

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

OPEN/SHORT Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

DC Bias . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

You Can NOT Use the Internal DC BIAS Source of Your Instrument. . . . . . . . . . . . . . . . . 15

Requirement for External Voltage Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Current Limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Capacitive Component Requires Time to Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Additional Error for D Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4. Service

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Replaceable Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4 Keysight 16065C External Bias Adapter

Contents

Keysight 16065C External Bias Adapter

Operation and Service Manual

1 General Information

Introduction

The purpose of this manual is to enable you to use your 16065C External Bias

Adapter efficiently and confidently. This manual contains both general and

specific information. To use the 16065C to perform a specific function (without

having to read the entire manual), follow the directions in "Using the 16065C".

Using the 16065C

• To install the 16065C, turn to Chapter 2.

• To operate the 16065C, turn to Chapter 3.

• To order replaceable parts for the 16065C, turn to "Replaceable Parts" in

Chapter 4.

Product Description

The 16065C has been designed to operate specifically with the E4980AL LCR

Meter and E4981A Capacitance Meter. By connecting an external dc voltage

source to the 16065C, the 16065C can supply a bias voltage across

components of up to ±40 V dc through a four-terminal pair type test fixture.

Accessories Supplied

The following accessories are supplied with the 16065C:

Table 1-1 Furnished Accessories

Description Part Number Quantity

Operation and Service Manual (this manual) 16065-90020 1

6 Keysight 16065C External Bias Adapter

General Information

Operating and Safety Precautions

1-

Operating and Safety Precautions

Operating

You need observe only normal precautions when handling and operating the

16065C. Do not exceed the operating input power, voltage, and current level

and signal type appropriate for the measurement instrument being used, refer

to your instrument's operation manual.

Service

The voltage levels in this adapter do not warrant more than normal caution for

operator safety. Nevertheless, service should be performed only by qualified

personnel.

Electrostatic discharge (esd) can damage the highly sensitive microcircuits

in your instrument. ESD damage is most likely to occur as the 16065C is

being connected or disconnected. Protect the 16065C from ESD damage

by wearing a grounding strap that provides a high resistance path to

ground. Alternatively, ground yourself to discharge any static charge

build-up by touching the outer shell of any grounded instrument chassis

before touching the test port connectors.

Never touch a test port connector's center contacts.

Use a work station equipped with an anti-static work surface.

Keysight 16065C External Bias Adapter 7

General Information

Specifications

Specifications

This section lists the complete 16065C specifications. These specifications are

the performance standards and limits against which the 16065C is tested.

When shipped from the factory, the 16065C meets the following specifications:

External DC Bias

Up to ±40 V can be applied to the DC BIAS INPUT BNC

connector.

Frequency Range

100 Hz to 1 MHz

Applicable Instrument

E4981A, E4980AL

Applicable Fixture

16034E/G/H, 16047A/E, 16048A/D, 16089A/B/C

Input Resistance

2 kΩ±10%

Weight

450 g

Operating Temperature

0 to 55 °C

Operating Humidity

~95% RH (@40 °C)

Non-operating Temperature

–40 to 70 °C

Non-operating Humidity

~95% RH (@65 °C)

Dimensions

160 mm (w) × 50 mm (h) × 150 mm (d)

Cable Length

210 mm

8 Keysight 16065C External Bias Adapter

General Information

Specifications

1-

Keysight 16065C External Bias Adapter

Operation and Service Manual

2 Operating and Safety Precautions

Introduction

This chapter explains how to install the 16065C External Bias Adapter. The

topics covered include initial inspection, ambient environmental

considerations, connecting the adapter for use, and repackaging the adapter.

Initial Inspection

The adapter has been carefully inspected electrically and mechanically before

being shipped from the factory. It should be in perfect physical condition, no

scratches, dents or the like, and it should be in perfect electrical condition.

Verify this by carefully performing an incoming inspection to check the adapter

for signs of physical damage and missing contents. If any discrepancy is found,

notify the carrier and Keysight Technologies. Your Keysight Technologies sales

office will arrange for repair and replacement without waiting for the claim to

be settled.

Step 1. Inspect the shipping container for damage, and keep the shipping materials

until the inspection is completed.

Step 2. Verify that the shipping container contains everything shown in Figure 2-1

and listed in Table 2-1.

Step 3. Inspect the exterior of the 16065C for any signs of damage.

10 Keysight 16065C External Bias Adapter

Operating and Safety Precautions

Environmental Considerations

2-

Figure 2-1 Product Overview

Environmental Considerations

Operating and Storage

The 16065C should be operated within an ambient temperature range of 0 °C

to 55 °C and relative humidity up to 95% at 40 °C (non-condensing).

The 16065C may be stored within a temperature range of –40 °C to +70 °C,

and at a relative humidity of up to 95% at +65 °C (non-condensing).

Table 2-1 Contents

Description Keysight Part Number Quantity

External BIAS Adapter

16065-60370

1

(16065C)

1. Keysight internal-only part number. Purchase the whole unit of the 16065C External

Bias Adapter for replacement.

1

Operation and Service Manual

2

2. Operation and Service Manual is not shown in Figure 2-1.

16065-90020 1

Keysight 16065C External Bias Adapter 11

Operating and Safety Precautions

Connecting the Adapter for Use

Connecting the Adapter for Use

Figure 2-2 Connecting the Adapter

Repackaging the Adapter

If shipping to a Keysight Technologies service center is required, each adapter

should be repackaged using the original factory packaging materials.

Alteratively, comparable packaging materials may be used. Wrap the adapter

in heavy paper and pack in anti-static plastic packing material. Use sucient

shock absorbing material on all sides of the 16065C to provide a thick, firm

cushion and to prevent movement. Seal the shipping container securely and

mark it FRAGILE.

Make sure that the voltage source is turned off before you start making

connections.

12 Keysight 16065C External Bias Adapter

Operating and Safety Precautions

Repackaging the Adapter

2-

Keysight 16065C External Bias Adapter

Operation and Service Manual

3 Operation

Introduction

This chapter describes the features of the 16065C (Figure 3-1), the connection

to an external voltage source and test fixture, and compensation techniques.

Figure 3-1 Adapter Features

1. Four-terminal-pair test leads. These are connected to the UNKNOWN

terminals of an LCR meter or impedance analyzer.

2. Four-terminal-pair BNC terminals. These terminals are connected to a

four-terminal-pair type fixture.

3. DC Bias Input BNC. This terminal is connected to an external voltage

source in order to apply dc bias voltage to the DUT.

14 Keysight 16065C External Bias Adapter

Operation

OPEN/SHORT Correction

3-

OPEN/SHORT Correction

The 16065C has inherent stray capacitance, residual inductance, and residual

resistance which, if not properly compensated for before a measurement is

made, will degrade measurement accuracy. To cancel these residuals and thus

minimize measurement error, the measuring instrument's OPEN/SORT

correction capability must be used. The procedure is described in the

instrument's operation manual.

Operation

The step-by-step instructions on how to make a measurement with the

16065C are:

Step 1. Connect the test leads of 16065C to the measuring Instrument's UNKNOWN

terminals.

Step 2. Connect the test fixture directly to the 16065C.

Step 3. Connect the dc voltage source to the 16065C's DC BIAS INPUT BNC.

Step 4. Perform OPEN and SHORT correction as described in the measuring

instrument manual.

Step 5. Insert the component to be tested into the test fixture.

Do NOT turn on the voltage source while correction is in progress.

Do NOT short the high and low terminals when the voltage source is turn

on.

When a positive bias vol tage is used, the positive terminal of an electrolytic

capacitor must be connected to the instruments high terminal. When using

a negative bias voltage, connect an electrolytic capacitor's negative

terminal to the instrument's high terminal.

When measuring high value capacitors, allow suffcient time for the

capacitor to charge to the applied voltage.

Keysight 16065C External Bias Adapter 15

Operation

DC Bias

DC Bias

You Can NOT Use the Internal DC BIAS Source of Your Instrument

The 16065C contains a 100 µF capacitor, series connected between the H

cur

terminal and the component under test. Its function is to block the applied dc

voltage from flowing back into the measuring instrument. Also, because of its

location, this capacitor makes it impossible to bias samples from the

measuring instrument's internal bias source. Thus, the 16065C can not be used

for applications in which the instrument's internal bias source is used.

Requirement for External Voltage Source

The external dc voltage source used for biasing samples connected to the

16065C must be

capable of delivering 20 mA at 40 V.

Current Limiting

The 16065C's DC Bias Input has a 2 kΩ current limiting resistor in series with

the component under test.

Capacitive Component Requires Time to Charge

The 16065C DC BIAS INPUT has a 2 kΩ current limiting resistor in series with

the component under test. The time required for a capacitive component to

charge through this resistance is calculated as:

T(s) = 1.6 + (0.01 × C) [sec]

Where C is the capacitance of the sample, in µF.

16 Keysight 16065C External Bias Adapter

Operation

DC Bias

3-

Additional Error for D Measurement

Because of the series-connected capacitor between the H

pot

terminal and the

component under test, there is a test frequency dependent phase shift

between the H

pot

terminal and the L

cur

terminal. The input impedance of the

instrument causes additional error in some measurement modes. The

additional error for phase measurements (Ep) is derived by the following

equation:

E

p

_ 70 / f (%)

(Typical)

where f is measurement frequency and unit is Hz.

The additional error for D measurements (E

D

) is derived by the following

equation:

E

D

_ 0.7 / f

(Typical)

The compensation function of the E4981A and E4980AL can correct the

additional error caused by the 16065C. For more information on

compensation and correction, refer your instrument's manual.

Keysight 16065C External Bias Adapter

Operation and Service Manual

4 Service

Introduction

This chapter gives service information for the 16065C. The Replaceable Parts

List and the Schematic Diagram are included.

Serial numbers for Non-RoHS 16065C: “MY431xxxxx and below” /

“SG431xxxxx and below”

Serial numbers for RoHS 16065C: “MY432xxxxx and above” / “SG432xxxxx and

above”

Replaceable Parts

Figure 4-1 and Table 4-1 identify the replaceable mechanical parts and their

respective RoHS compliant replacement support part. RoHS conversion

involves design and dimension change, which results in the RoHS support part

backward incompatible with the non-RoHS 16065C. Special handling is

needed while using the RoHS replacement part on the non-RoHS 16065C. The

original support part number is replaced by the respective “RoHS Compliant

Keysight Part Number”. Once the original support part is depleted, please

proceed to obtain the RoHS compliant support part. The parts listed can be

ordered from your nearest Keysight Technologies office. Ordering information

should include the Keysight part number and the quantity required.

18 Keysight 16065C External Bias Adapter

Service

Replaceable Parts

4-

Figure 4-1 Replaceable Parts Identiers

Table 4-1 Replaceable Mechanical Parts

Reference

Designator

Keysight

Part Number

RoHS

Compliant

Keysight

Part Number

Qty Descrption

1 1250-0083 1250-0083 1 Connector BNC

(for "Ext DC Bias")

2190-0016 2190-0016 1

Washer

1

2950-0043 2950-0043 1

Nut

1

2 16065-04002 16065-04602 1 Chassis

3 16065-04001 16065-04601 1 Chassis Top Cover

Keysight 16065C External Bias Adapter 19

Service

Replaceable Parts

4 16065-61602 16065-61672 1 Cable Assembly "LC"

5 16065-61603 16065-61673 1 Cable Assembly "LP"

6 16065-61605 16065-61675 1 Cable Assembly "HP"

7 16065-61604 16065-61674 1 Cable Assembly "HC"

8 0515-0914 0515-1946 4 Screw Flat Head M3 L6

9 94801-40042 0400-0010 4 Grommet

10 1400-0249 1400-0249 4 Cable Tie

11 0515-1550 0515-0372 4 Screw Pan Head M3×0.5 L8 w/

Washer

12 16065-66503 16065C 1 PC Board Assembly

13 0515-1550 0515-0372 3 Screw Pan Head M3×0.5 L8 w/

Washer

14 16065-01201 16065-01271 1 Angle

15 1250-0118 1250-0118 4 Connector BNC

16047-40002 16047-40002 8

Insulator

2

2190-0016 2190-0016 4

Washer

2

0360-1190 0360-1190 4

Terminal Solder Lug

2

2950-0043 2950-0043 4

Nut

2

0403-0427 0403-0427 6

Bumper Foot

2

1. These parts are for 1.

2. These parts are for 15.

Table 4-1 Replaceable Mechanical Parts (Continued)

Reference

Designator

Keysight

Part Number

RoHS

Compliant

Keysight

Part Number

Qty Descrption

20 Keysight 16065C External Bias Adapter

Service

Replaceable Parts

4-