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Keysight N1911A/1912A P-Series Power Meters

User’s Guide

Notices

CAUTION

WARNING

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 as governed by United States and international copyright laws.

Manual Part Number

N1912-90002

Edition

Edition 18, September 29, 2017

Printed in:

Printed in Malaysia

Published by:

Keysight Technologies Bayan Lepas Free Industrial Zone, 11900 Penang, Malaysia

Technology Licenses

The hardware and/or software described in this document are furnished under a license and may be used or copied only in accordance with the terms of such license.

Declaration of Conformity

Declarations of Conformity for this product and for other Keysight products may be downloaded from the Web.

U.S. Government Rights

The Software is “commercial computer software,” as defined by Federal 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 software under the same terms by which the software is customarily provided to the public. Accordingly, Keysight provides the Software to U.S. government customers under its standard commercial license, which is embodied in its End User License Agreement (EULA). The license set forth in the EULA represents the exclusive authority by which the U.S. government may use, modify, distribute, or disclose the Soft-ware. The EULA and the license set forth therein, does not require or per-mit, among other things, that Keysight: (1) Furnish technical information related to commercial computer commercial computer software documentation that is not customarily provided to the public; or (2) Relinquish to,

or otherwise provide, the government rights in excess of these rights customarily provided to the public to use, modify, reproduce, release, per-form, display, or computer software com-puter software documentation. No additional government requirements beyond those set forth in the EULA shall apply, except to the extent licenses are explicitly required from all providers of commercial computer software pursu-ant to the FAR and the DFARS and are set forth specifically in writing 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.

disclose commercial

that those terms, rights, or

else-where in the EULA.

soft-ware or

or commercial

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, EITHER EXPRESS OR IMPLIED, WITH REGARD TO THIS MANUAL AND ANY INFORMATION CONTAINED HEREIN, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. KEYSIGHT SHALL NOT BE LIABLE FOR ERRORS OR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES IN CONNECTION WITH THE FURNISHING, USE, OR PERFORMANCE OF THIS DOCUMENT OR OF ANY INFORMATION CONTAINED HEREIN. SHOULD KEYSIGHT AND THE USER HAVE A SEPARATE WRITTEN AGREEMENT WITH WARRANTY TERMS COVERING THE MATERIAL IN THIS DOCUMENT THAT CONFLICT WITH THESE TERMS, THE WARRANTY TERMS IN THE SEPARATE AGREEMENT SHALL CONTROL.

Safety Information

A CAUTION notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not correctly performed or adhered to, could result in damage to the product or loss of important data. Do not proceed beyond a CAUTION notice until the indicated conditions are fully understood and met.

A WARNING notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not correctly performed or adhered to, could result in personal injury or death. Do not proceed beyond a WARNING notice until the indicated conditions are fully understood and met.

2 Keysight N1911A/1912A User’s Guide

Certification

Keysight Technologies certifies that this product met its published specifications at the time of shipment. Keysight further certifies that its calibration measurements are traceable to the United States National Institute of Standard and Technology (formerly National Bureau of Standards), to the extent allowed by that organization’s calibration facility, and to the calibration facilities of other International Standards Organization members.

General 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, either express or implied with regard to this manual and any information contained herein, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Keysight shall not be liable for errors or for incidental or consequential damages in connection with the furnishing, use, or performance of this document or any information contained herein. Should Keysight and the user have a separate written agreement with warranty terms covering the material in this document that conflict with these terms, the warranty terms in the separate agreement shall control. Duration and conditions of warranty for this product may be superseded when the product is integrated into (becomes a part of) other Keysight products. During the warranty period, Keysight will, at its option, either repair or replace products which prove to be defective. The warranty period begins on the date of delivery or on the date of installation if installed by Keysight.

Warranty Service

For warranty service or repair, this product must be returned to a service facility designated by Keysight. For products returned to Keysight for warranty service, the Buyer shall prepay shipping charges to Keysight and Keysight 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 from another country.

Keysight N1911A/1912A User’s Guide 3

Limitation of Warranty

The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Buyer, Buyer-supplied products or interfacing, unauthorized modification or misuse, operation outside of the environmental specifications for the product, or improper site preparation or maintenance.

The design and implementation of any circuit on this product is the sole responsibility of the Buyer. Keysight does not warrant the Buyer’s circuitry or malfunctions of Keysight products that result from the Buyer’s circuitry. In addition, Keysight does not warrant any damage that occurs as a result of the Buyer’s circuit or any defects that result from Buyer-supplied products.

To the extent allowed by local law, Keysight makes no other warranty, expressed or implied, whether written or oral with respect to this product and specifically disclaims any implied warranty or condition of merchantability, fitness for a particular purpose or satisfactory quality.

Exclusive Remedies

To the extent allowed by local law, the remedies provided herein are the Buyer’s sole and exclusive remedies. Keysight shall not be liable for any direct, indirect, special, incidental, or consequential damages (including lost profit or data), whether based on warranty, contract, tort, or any other legal theory.

4 Keysight N1911A/1912A User’s Guide

Restricted Rights Legend

The Software and Documentation have been developed entirely at private expense. They are delivered and licensed as “commercial computer software” as defined in DFARS 252.227-7013 (Oct 1988), DFARS 252.211-7015 (May 1991), or DFARS 252.227-7014 (Jun 1995), as a “commercial item” as defined in FAR

2.101(a), or as “restricted computer software” as defined in FAR 52.227-19 (Jun

1987) (or any equivalent agency regulation or contract clause), whichever is applicable. You have only those rights provided for such Software and Documentation by the applicable FAR or DFARS clause or the Keysight standard software agreement for the product involved.

Technology Licenses

The hardware and/or software described in this document are furnished under a license and may be used or copied only in accordance with the terms of such license.

Keysight N1911A/1912A User’s Guide 5

Safety Symbols

The following symbols on the instrument and in the documentation indicate precautions which must be taken to maintain safe operation of the instrument.

Direct current (DC). Alternating current (AC).

Off (mains supply). On (mains supply).

Caution, risk of electric shock.

Earth (ground) terminal. Frame or chassis (ground) terminal.

Protective earth (ground) terminal.

Caution, risk of danger (refer to this manual for specific Warning or Caution information).

Equipment protected throughout by double insulation or reinforced insulation.

Both direct and alternating current.

Caution, hot surface. In position of a bi-stable push control.

Three-phase alternating current. Equipotentiality.

This symbol indicates the operating switch for ‘Stand-by’ mode. Note, the instrument is NOT isolated from the mains when the switch is pressed. To isolate the instrument, the mains coupler (mains input cord) should be removed from the power supply.

Out position of a bi-stable push control.

6 Keysight N1911A/1912A User’s Guide

Safety Considerations

Read the information below before using this instrument.

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 violates safety standards for design, manufacture, and intended use of the instrument. Keysight Technologies assumes no liability for the customer’s failure to comply with these requirements.

Recommended Calibration Interval

Keysight Technologies recommends a two- years calibration cycle for the N1911A/1912A P-Series power meter.

Keysight N1911A/1912A User’s Guide 7

General Safety Information

WARNING

This is a Safety Class I instrument (provided with a protective earthing ground, incorporated in the power cord). The mains plug shall only be inserted in a socket outlet provided with a protective earth contact. Any interruption of the protective conductor inside or outside of the instrument is likely to make the instrument dangerous. Intentional interruption is prohibited.

– DO NOT operate the product in an explosive atmosphere or in the

presence of flammable gases or fumes.

– DO NOT use repaired fuses or short-circuited fuseholders: For continued

protection against fire, replace the line fuse(s) only with fuse(s) of the same voltage and current rating and type.

– DO NOT perform procedures involving cover or shield removal unless you

are qualified to do so: Operating personnel must not remove equipment covers or shields. Procedures involving the removal of covers and shields are for use by service-trained personnel only.

– DO NOT service or adjust alone: Under certain conditions, dangerous

voltages may exist even with the equipment switched off. To avoid dangerous electrical shock, service personnel must not attempt internal service or adjustment unless another person, capable of rendering first aid and resuscitation, is present.

– DO NOT operate damaged equipment: Whenever it is possible that the

safety protection features built into this product have been impaired, either through physical damage, excessive moisture, or any other reason, REMOVE POWER and do not use the product until safe operation can be verified by service-trained personnel. If necessary, return the product to a Keysight Technologies Sales and Service Office for service and repair to ensure the safety features are maintained.

– DO NOT substitute parts or modify equipment: Because of the danger of

introducing add itional hazards, do not install substitute parts or perform any unauthorized modification to the product. Return the product to a Keysight Technologies Sales and Service Office for service and repair to ensure the safety features are maintained.

8 Keysight N1911A/1912A User’s Guide

Environmental Conditions

The N1911A/1912A is designed for indoor use and in an area with low condensation. The table below shows the general environmental requirements for this instrument.

Environmental condition Requirement

Temperature

Humidity

Altitude Up to 3000 m

Pollution degree 2

Operating condition – 0 °C to 55 °C Storage condition – –40 °C to 70 °C

Operating condition – Up to 95% RH at 40 °C (non-condensing) Storage condition – Up to 90% RH at 65 °C (non-condensing)

Keysight N1911A/1912A User’s Guide 9

Regulatory Information

The N1911A/1912A complies with the following safety and Electromagnetic Compatibility (EMC) compliances:

Safety compliance

– IEC 61010-1:2010/EN 61010-1:2010 (3rd Edition)

– Canada: CAN/CSA-C22.2 No. 61010-1-12

– USA: ANSI/UL 61010-1:2012

EMC compliance

– IEC 61326-1:2005/EN 61326-1:2006

– CISPR11:2003/EN 55011:1998+A1:1999+A2:2002, Group 1 Class A

– Canada: ICES/NMB-001:Issue 4, June 2006

– Australia/New Zealand: AS/NZS CISPR 11:2004

10 Keysight N1911A/1912A User’s Guide

Regulatory Markings

The CE mark is a registered trademark of the European Community. This CE mark shows that the product complies with all the relevant European Legal Directives.

ICES/NMB-001 indicates that this ISM device complies with the Canadian ICES-001. Cet appareil ISM est conforme a la norme NMB-001 du Canada.

ISM GRP.1 Class A indicates that this is an Industrial Scientific and Medical Group 1 Class A product.

This symbol is a South Korean Class A EMC Declaration. This is a Class A instrument suitable for professional use and in electromagnetic environment outside of the home.

This symbol indicates the time period during which no hazardous or toxic substance elements are expected to leak or deteriorate during normal use. Forty years is the expected useful life of the product.

The CSA mark is a registered trademark of the Canadian Standards Association.

The RCM mark is a registered trademark of the Australian Communications and Media Authority.

This instrument complies with the WEEE Directive (2002/96/EC) marking requirement. This affixed product label indicates that you must not discard this electrical or electronic product in domestic household waste.

Keysight N1911A/1912A User’s Guide 11

Waste Electrical and Electronic Equipment (WEEE) Directive 2002/ 96/EC

Product category:

With reference to the equipment types in the WEEE directive Annex 1, this instrument is classified as a “Monitoring and Control Instrument” product.

The affixed product label is as shown below.

Do not dispose in domestic household waste.

12 Keysight N1911A/1912A User’s Guide

Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

General Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Warranty Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Limitation of Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Exclusive Remedies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Restricted Rights Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Technology Licenses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Recommended Calibration Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

General Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Safety compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

EMC compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Regulatory Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/

EC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Product category: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Sales and Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

1Introduction

LXI Class-C Compliant Power Meter . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Rack Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Power Meter and Sensor Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Conventions Used in this Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Front Panel Keys and Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

The Display Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Keysight N1911A/1912A User’s Guide 13

Window Symbols and Pop-ups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Warning symbol pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Wait symbol pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Confirm symbol pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Numeric entry pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Text entry pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Trace scaling pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

List pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Using the Instrument Web Browser . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Editing the Instrument’s LAN Settings . . . . . . . . . . . . . . . . . . . . . . . 54

2 General Power Meter Functions

Setting the Units of Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Selecting units of measurement from the softkeys . . . . . . . . . . . . . 59

Setting the Measurement Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Setting the Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Making Relative Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Setting the Pulse Reference Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Setting Offsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Setting channel offsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Setting display offsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Setting frequency dependent offsets . . . . . . . . . . . . . . . . . . . . . . . . 71

Editing frequency dependent offset tables . . . . . . . . . . . . . . . . . . . . 74

Setting Measurement Averaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Step Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Setting the Video Averaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

14 Keysight N1911A/1912A User’s Guide

Setting the Video Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85

Setting Measurement Channel Gates . . . . . . . . . . . . . . . . . . . . . . . . . .87

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

Auto Gate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Setting up the Channel Trace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

Auto Scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95

Setting the Trigger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97

Setting External Trigger for Normal and Average Power Measurement . .

103

Power sweep mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104

Frequency sweep mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112

Determine the right step to be set . . . . . . . . . . . . . . . . . . . . . . . . .117

Setting Measurement Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118

Setting limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119

Checking for limit failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121

Setting the Measurement Display . . . . . . . . . . . . . . . . . . . . . . . . . . . .122

Numeric format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124

Single function measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125

Combined Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127

Scaling the Analog Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129

Recorder Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .131

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .131

N1911A/N1912A Option H01 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135

Saving and Recalling Power Meter States . . . . . . . . . . . . . . . . . . . . . .137

Editing a register’s name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138

Recalling a measurement setup . . . . . . . . . . . . . . . . . . . . . . . . . . .139

Zeroing and Calibrating the P-Series Sensor . . . . . . . . . . . . . . . . . . .140

Zeroing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .141

Keysight N1911A/1912A User’s Guide 15

Zero/Cal Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Presetting the Power Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Setting the Cable Short/Long . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Short . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

Long . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

3 Using P-Series Power Sensor

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Configuring a Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

Setting the Trace Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

Step 1. Connecting the power sensor . . . . . . . . . . . . . . . . . . . . . . 153

Step 2. Setting the channel frequency . . . . . . . . . . . . . . . . . . . . . . 153

Step 3. Setting the trigger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Step 4. Setting the display to trace . . . . . . . . . . . . . . . . . . . . . . . . 154

Step 5. Expanding the trace display . . . . . . . . . . . . . . . . . . . . . . . . 155

Gate Control in a Single Enlarged Window . . . . . . . . . . . . . . . . . . 156

Viewing the results in a full screen window . . . . . . . . . . . . . . . . . . 160

Improving the accuracy with additional settings . . . . . . . . . . . . . . 162

4 Using E9320 E-Series Power Sensors

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

Power Meter Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Default Channel Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Configuring a Peak Power Measurement . . . . . . . . . . . . . . . . . . . . . . 169

Measurement Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

Setting the Trace Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Step 1. Connecting the power sensor . . . . . . . . . . . . . . . . . . . . . . 173

Step 2. Setting the channel frequency . . . . . . . . . . . . . . . . . . . . . . 173

Step 3. Setting the trigger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

Step 4. Setting the display to trace . . . . . . . . . . . . . . . . . . . . . . . . 174

Step 5. Expanding the trace display . . . . . . . . . . . . . . . . . . . . . . . . 175

Gate Control in a Single Enlarged Window . . . . . . . . . . . . . . . . . . 176

Viewing the results in a full screen window . . . . . . . . . . . . . . . . . . 180

16 Keysight N1911A/1912A User’s Guide

Improving the accuracy with additional settings . . . . . . . . . . . . . .181

5 Using E9300 E-Series Power Sensors

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .186

Power Meter Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .187

Default Channel Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .188

Measurement Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .189

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .190

Measuring Spread Spectrum and Multitone Signals . . . . . . . . . . . . . .192

CDMA signal measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .193

Multitone signal measurements . . . . . . . . . . . . . . . . . . . . . . . . . . .194

Measuring TDMA Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .195

Power meter and sensor operation . . . . . . . . . . . . . . . . . . . . . . . . .195

Achieving stable results with TDMA signals . . . . . . . . . . . . . . . . . .195

Achieving stable results with GSM signals . . . . . . . . . . . . . . . . . . .196

Electromagnetic Compatibility (EMC) Measurements . . . . . . . . . . . . .197

Measurement Accuracy and Speed . . . . . . . . . . . . . . . . . . . . . . . . . . .198

Setting the range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .198

Measurement considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . .199

6 Using E4410 E-Series Power Sensors

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .202

Power Meter Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203

Default Channel Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .204

Measurement Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .205

7 Using 8480 Series Power Sensors

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .208

Power Meter Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .209

Default Channel Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .210

8480 Series sensors connection requirements . . . . . . . . . . . . . . . .210

Measurement Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .212

Keysight N1911A/1912A User’s Guide 17

Frequency Specific Calibration Factors . . . . . . . . . . . . . . . . . . . . . . . . 213

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213

Sensor Calibration Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218

Editing/Generating sensor calibration tables . . . . . . . . . . . . . . . . . 221

Pre-installed calibration table contents . . . . . . . . . . . . . . . . . . . . . 225

8 Using N8480 Series Power Sensors

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230

Power Meter Configuration Changes . . . . . . . . . . . . . . . . . . . . . . . . . 232

Default Channel Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233

N8480 Series Sensors Connection Requirements . . . . . . . . . . . . . . . 234

N8480 Series Power Sensors (excluding Option CFT) . . . . . . . . . . . . 235

Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

N8480 Series Power Sensors with Option CFT . . . . . . . . . . . . . . . . . . 237

Frequency specific calibration factors . . . . . . . . . . . . . . . . . . . . . . 237

Sensor calibration tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242

Selecting a sensor calibration table . . . . . . . . . . . . . . . . . . . . . . . . 243

Editing/Generating sensor calibration tables . . . . . . . . . . . . . . . . . 246

9 Complementary Cumulative Distribution Function (CCDF)

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252

Setting the CCDF Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253

Windowed CCDF table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253

Expanded CCDF table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254

Full Screen CCDF table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255

Setting the CCDF Trace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256

10 Maintenance

Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262

Power on self test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262

Front panel selection of Self Tests . . . . . . . . . . . . . . . . . . . . . . . . . 262

Instrument Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263

18 Keysight N1911A/1912A User’s Guide

Remote testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .264

Test descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .264

Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .266

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .266

Error message list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .268

Operator Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .275

Replacing the power line fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . .275

Contacting Keysight Technologies . . . . . . . . . . . . . . . . . . . . . . . . . . . .277

Before calling Keysight Technologies . . . . . . . . . . . . . . . . . . . . . . .277

Check the basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .277

Instrument serial numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .278

Erasing Memory Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .280

Returning Your Power Meter for Service . . . . . . . . . . . . . . . . . . . . . . .281

Packaging the power meter for shipment . . . . . . . . . . . . . . . . . . . .281

11 Specifications and Characteristics

Keysight N1911A/1912A User’s Guide 19

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20 Keysight N1911A/1912A User’s Guide

List of Figures

Figure 1-1 Dual numeric display . . . . . . . . . . . . . . . . . . . . . . . . . .38

Figure 1-2 Single numeric and analog display . . . . . . . . . . . . . . .40

Figure 1-3 Full screen numeric display . . . . . . . . . . . . . . . . . . . . .41

Figure 1-4 Trace display in both windows . . . . . . . . . . . . . . . . . . .42

Figure 1-5 Trace display in single enlarged window in markers

Figure 1-6 Trace display in single enlarged window in trigger delay

Figure 1-7 Trace display in single enlarged window in trace control

Figure 1-8 Opening the instrument Web interface. . . . . . . . . . . . 50

Figure 1-9 N1912A P-Series power meter Web browser (Welcome

Figure 1-10 Status message before Toggle ID is selected. . . . . . .52

Figure 1-11 Status message when Toggle ID is selected. . . . . . . .52

Figure 1-12 Example of Lan Status message . . . . . . . . . . . . . . . . .53

Figure 1-13 Viewing LAN configuration settings from the Web

Figure 1-14 Password security dialog box. . . . . . . . . . . . . . . . . . . . 55

Figure 1-15 Changing the instrument LAN interface configuration 56

Figure 2-1 Frequency pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

Figure 2-2 Typical relative measurement display . . . . . . . . . . . . .62

Figure 2-3 Numeric display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Figure 2-4 Measurement configuration screen . . . . . . . . . . . . . . .64

Figure 2-5 Pulse duration measurement between two reference

Figure 2-6 Trace Ref Lvl 1 pop-up . . . . . . . . . . . . . . . . . . . . . . . . .65

Figure 2-7 Trace Ref Lvl 2 pop-up . . . . . . . . . . . . . . . . . . . . . . . . .66

Figure 2-8 Pulse Duration Ref Lvl pop-up . . . . . . . . . . . . . . . . . . .66

Figure 2-9 Simplified measurement path . . . . . . . . . . . . . . . . . . .67

Figure 2-10 Typical channel offset display . . . . . . . . . . . . . . . . . . .68

Figure 2-11 Channel offset indicator . . . . . . . . . . . . . . . . . . . . . . . .69

Figure 2-12 Typical display offset display . . . . . . . . . . . . . . . . . . . .70

Figure 2-13 Frequency dependent offset tables display . . . . . . . . .73

mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Page) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

Keysight N1911A/1912A User’s Guide 21

Figure 2-14 Frequency dependent offset indicator . . . . . . . . . . . . 73

Figure 2-15 “Edit Offset” display with data added . . . . . . . . . . . . . 75

Figure 2-16 Edit table title pop-up . . . . . . . . . . . . . . . . . . . . . . . . . 76

Figure 2-17 Typical averaged readings . . . . . . . . . . . . . . . . . . . . . . 78

Figure 2-18 Meas Avg Count pop-up . . . . . . . . . . . . . . . . . . . . . . . 79

Figure 2-19 Video Avg Count pop-up . . . . . . . . . . . . . . . . . . . . . . . 83

Figure 2-20 Bandwidth filter shapes . . . . . . . . . . . . . . . . . . . . . . . . 85

Figure 2-21 Video bandwidth pop-up . . . . . . . . . . . . . . . . . . . . . . . 86

Figure 2-22 Example of measurement gates . . . . . . . . . . . . . . . . . 87

Figure 2-23 Gate Setup screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

Figure 2-24 Time Gating Start pop-up . . . . . . . . . . . . . . . . . . . . . . 89

Figure 2-25 Time Gating Length pop-up . . . . . . . . . . . . . . . . . . . . 89

Figure 2-26 Auto Gate Settings display . . . . . . . . . . . . . . . . . . . . . 90

Figure 2-27 Marker 1 Ref Percentage pop-up . . . . . . . . . . . . . . . . 90

Figure 2-28 Marker 2 Ref Percentage pop-up . . . . . . . . . . . . . . . . 91

Figure 2-29 The placement of gates (markers) in Auto Gating mode

Figure 2-30 Trace setup display . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Figure 2-31 Trace Start Time pop-up . . . . . . . . . . . . . . . . . . . . . . . 93

Figure 2-32 X Scale/Division pop-up . . . . . . . . . . . . . . . . . . . . . . . 93

Figure 2-33 Trace Units pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Figure 2-34 Y scale maximum value pop-up . . . . . . . . . . . . . . . . . 94

Figure 2-35 Y Scale/Division pop-up . . . . . . . . . . . . . . . . . . . . . . . 95

Figure 2-36 Trigger menu - free run mode . . . . . . . . . . . . . . . . . . . 96

Figure 2-37 Trigger Setting Menu 1 of 2 . . . . . . . . . . . . . . . . . . . . . 97

Figure 2-38 Trigger Level pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Figure 2-39 Trigger Delay pop-up . . . . . . . . . . . . . . . . . . . . . . . . . 99

Figure 2-40 Trigger setting menu 2 of 2 . . . . . . . . . . . . . . . . . . . . 100

Figure 2-41 Trigger Holdoff pop-up . . . . . . . . . . . . . . . . . . . . . . . 101

Figure 2-42 Trigger Hysteresis pop-up . . . . . . . . . . . . . . . . . . . . . 102

Figure 2-43 TRIG IN and TRIG OUT connection diagram between power

meter and power source. . . . . . . . . . . . . . . . . . . . 105

Figure 2-44 Channel Setup display . . . . . . . . . . . . . . . . . . . . . . . . 106

Figure 2-45 Sensor Mode pop-up. . . . . . . . . . . . . . . . . . . . . . . . . 107

Figure 2-46 Trigger setting menu 1 of 2 . . . . . . . . . . . . . . . . . . . . 108

Figure 2-47 Trigger setting menu 2 of 2 . . . . . . . . . . . . . . . . . . . . 108

Figure 2-48 Limits checking applications . . . . . . . . . . . . . . . . . . . 118

22 Keysight N1911A/1912A User’s Guide

Figure 2-49 Limits checking results . . . . . . . . . . . . . . . . . . . . . . . .118

Figure 2-50 Minimum limit pop-up . . . . . . . . . . . . . . . . . . . . . . . .120

Figure 2-51 Limit failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121

Figure 2-52 Sixteen measurements per channel . . . . . . . . . . . . .122

Figure 2-53 Measurement feed example . . . . . . . . . . . . . . . . . . . .123

Figure 2-54 Measurement Setup showing single configuration . .124

Figure 2-55 Function pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125

Figure 2-56 Measurement type pop-up . . . . . . . . . . . . . . . . . . . .126

Figure 2-57 Gating Number pop-up . . . . . . . . . . . . . . . . . . . . . . .126

Figure 2-58 Measurement Setup showing combined configuration .

127

Figure 2-59 Measurement example display . . . . . . . . . . . . . . . . .128

Figure 2-60 Maximum limit pop-up . . . . . . . . . . . . . . . . . . . . . . . .129

Figure 2-61 Minimum limit pop-up . . . . . . . . . . . . . . . . . . . . . . . .130

Figure 2-62 Increment and decrement multiplier . . . . . . . . . . . . .130

Figure 2-63 Recorder Minimum pop-up . . . . . . . . . . . . . . . . . . . .132

Figure 2-64 Recorder Maximum pop-up . . . . . . . . . . . . . . . . . . . .132

Figure 2-65 Increment and decrement multiplier . . . . . . . . . . . . .134

Figure 2-66 Measurement example for Option H01 . . . . . . . . . . .135

Figure 2-67 Example screenshot of the RF Multitone waveform .136

Figure 2-68 Save/Recall screen . . . . . . . . . . . . . . . . . . . . . . . . . . .137

Figure 2-69 Save confirm pop-up . . . . . . . . . . . . . . . . . . . . . . . . .138

Figure 2-70 File name pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . .138

Figure 2-71 Recall pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139

Figure 2-72 Zeroing pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140

Figure 2-73 Calibration wait pop-up . . . . . . . . . . . . . . . . . . . . . . .142

Figure 2-74 Please zero and calibrate window . . . . . . . . . . . . . . .143

Figure 2-75 Preset display options . . . . . . . . . . . . . . . . . . . . . . . .145

Figure 2-76 Short/long cable option . . . . . . . . . . . . . . . . . . . . . . .147

Figure 3-1 P-Series sensor default channel setup . . . . . . . . . . .153

Figure 3-2 Trace display in dual channel power meter . . . . . . . .154

Figure 3-3 Trace display in single enlarged window . . . . . . . . . .155

Figure 3-4 Trace display with gate control menu . . . . . . . . . . . .156

Figure 3-5 Trace display with trigger delay menu . . . . . . . . . . . .158

Figure 3-6 Trace display with trace control menu . . . . . . . . . . . 159

Figure 3-7 Trace display in full screen . . . . . . . . . . . . . . . . . . . . .161

Figure 3-8 P-Series power sensor default channel setup . . . . . .162

Keysight N1911A/1912A User’s Guide 23

Figure 3-9 Channel offset display . . . . . . . . . . . . . . . . . . . . . . . . 163

Figure 4-1 Bandwidth Filter Shapes . . . . . . . . . . . . . . . . . . . . . . 167

Figure 4-2 E–Series E9320 power sensor default channel setup . . .

168

Figure 4-3 Frequency pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

Figure 4-4 E-Series E9320 power sensor channel setup when trigger

is selected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

Figure 4-5 Trace display in dual channel power meter . . . . . . . 174

Figure 4-6 Trace display in single enlarged window . . . . . . . . . 175

Figure 4-7 Trace display with gate control menu . . . . . . . . . . . . 176

Figure 4-8 Trace display with trigger delay menu . . . . . . . . . . . 177

Figure 4-9 Trace display with trace control menu . . . . . . . . . . . 179

Figure 4-10 Trace display in full screen . . . . . . . . . . . . . . . . . . . . 180

Figure 4-11 E-Series E9320 power sensor default channel setup 181

Figure 4-12 Channel offset display . . . . . . . . . . . . . . . . . . . . . . . . 182

Figure 5-1 E9300 E-Series auto-averaging settings . . . . . . . . . 187

Figure 5-2 . . . E9300 E-Series sensor default channel setup 188

Figure 5-3 Frequency pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

Figure 5-4 Spread spectrum signal . . . . . . . . . . . . . . . . . . . . . . . 192

Figure 5-5 Wideband CDMA error of E-Series E9300 power sensor

versus corrected CW sensor. . . . . . . . . . . . . . . . . 193

Figure 5-6 CDMA (IS-95A): 9Ch Fwd . . . . . . . . . . . . . . . . . . . . . 193

Figure 5-7 Calibration factors versus frequency . . . . . . . . . . . . . 194

Figure 6-1 E-Series CW sensor auto-averaging settings . . . . . . 203

Figure 6-2 E-Series E4410 sensor default channel setup . . . . . 204

Figure 6-3 Frequency pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

Figure 7-1 8480 Series auto-averaging settings . . . . . . . . . . . . 209

Figure 7-2 8480 Series sensor default channel setup . . . . . . . . 210

Figure 7-3 Reference Calibration Factor pop-up window . . . . . 214

Figure 7-4 Calibration factor pop-up window . . . . . . . . . . . . . . 215

Figure 7-5 Calibration factor display . . . . . . . . . . . . . . . . . . . . . . 215

Figure 7-6 Sensor table selected . . . . . . . . . . . . . . . . . . . . . . . . 218

Figure 7-7 Frequency dependent offset indicator . . . . . . . . . . . 219

Figure 7-8 Frequency/calibration table display . . . . . . . . . . . . . 220

Figure 7-9 “Sensor Tbls” screen . . . . . . . . . . . . . . . . . . . . . . . . . 222

Figure 7-10 “Edit Cal” display . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223

Figure 7-11 Edit table title pop-up . . . . . . . . . . . . . . . . . . . . . . . . 223

24 Keysight N1911A/1912A User’s Guide

Figure 8-1 Auto-averaging settings . . . . . . . . . . . . . . . . . . . . . . .232

Figure 8-2 N8480 Series sensor (excluding Option CFT) default chan-

nel setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .233

Figure 8-3 N8480 Series sensor with Option CFT default channel

setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .233

Figure 8-4 Frequency pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . .236

Figure 8-5 Reference calibration factor pop-up window . . . . . .238

Figure 8-6 Calibration factor pop-up window . . . . . . . . . . . . . . .239

Figure 8-7 Calibration factor displayed . . . . . . . . . . . . . . . . . . . .240

Figure 8-8 Sensor table selected . . . . . . . . . . . . . . . . . . . . . . . . .244

Figure 8-9 Frequency dependent offset indicator . . . . . . . . . . . .244

Figure 8-10 Frequency/calibration table display . . . . . . . . . . . . .245

Figure 8-11 “Sensor Tbls” screen . . . . . . . . . . . . . . . . . . . . . . . . .247

Figure 8-12 “Edit Cal” display . . . . . . . . . . . . . . . . . . . . . . . . . . . .248

Figure 8-13 Edit table title pop-up . . . . . . . . . . . . . . . . . . . . . . . .248

Figure 9-1 CCDF table in windowed display . . . . . . . . . . . . . . . .253

Figure 9-2 CCDF table in expanded display . . . . . . . . . . . . . . . .254

Figure 9-3 CCDF table in full-screen display . . . . . . . . . . . . . . .255

Figure 9-4 Trace Display Select control menu . . . . . . . . . . . . . .256

Figure 9-5 CCDF trace display with Marker Trace menu . . . . . .257

Figure 9-6 Scale/Div pop-up . . . . . . . . . . . . . . . . . . . . . . . . . . . .259

Figure 9-7 Selection of CCDF trace to be stored as a reference

trace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .259

Figure 10-1 Self test complete . . . . . . . . . . . . . . . . . . . . . . . . . . .263

Figure 10-2 Error indicator position . . . . . . . . . . . . . . . . . . . . . . . .266

Figure 10-3 Replacing the fuse . . . . . . . . . . . . . . . . . . . . . . . . . . .276

Figure 10-4 Secure erase status pop-up . . . . . . . . . . . . . . . . . . . .280

Keysight N1911A/1912A User’s Guide 25

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26 Keysight N1911A/1912A User’s Guide

List of Tables

Table 1-1 Type of Lan Status message . . . . . . . . . . . . . . . . . . . .53

Table 2-1 Measurement units - Single channel meters . . . . . . . 58

Table 2-2 Measurement units - Dual channel meters . . . . . . . . .58

Table 2-3 P-Series Sensor Video Bandwidth Setting . . . . . . . . .84

Table 2-4 Power and frequency sweep mode compatibility table .

103 Table 2-5 Power and frequency sweep measurement functions

table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104

Table 2-6 Range of values for window limits . . . . . . . . . . . . . . .119

Table 2-7 Ranges of recorder output setting . . . . . . . . . . . . . . .133

Table 2-8 Preset compatibility matrix for E-Series E9320 power

sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146

Table 4-1 Sensor Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . .166

Table 5-1 Power sensor connection requirements . . . . . . . . . .189

Table 7-1 8480 Series connection requirements . . . . . . . . . . . .210

Table 7-2 Installed power sensor models . . . . . . . . . . . . . . . . .221

Table 8-1 Power range in the Range setting . . . . . . . . . . . . . . .230

Table 8-2 N8480 Series connection requirements . . . . . . . . . .234

Table 8-3 Installed power sensor models . . . . . . . . . . . . . . . . .246

Keysight N1911A/1912A User’s Guide 27

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28 Keysight N1911A/1912A User’s Guide

Keysight N1911A/1912A P-Series Power Meters User’s Guide

1 Introduction

LXI Class-C Compliant Power Meter 30 Rack Mounting 30 Power Meter and Sensor Capability 31 Conventions Used in this Guide 32 Front Panel Keys and Connections 33 The Display Layout 38 Window Symbols and Pop-ups 46 Using the Instrument Web Browser 50

This chapter introduces you to the front panel display and instrument Web browser of the P-Series power meter.

1Introduction

LXI Class-C Compliant Power Meter

P-Series power meter is a LXI Class C compliant instrument, developed using LXI Technology. LXI, an acronym for LAN eXtension for Instrumentation, is an instrument standard for devices that use the Ethernet (LAN) as their primary communication interface.

Hence, it is an easy-to-use instrument especially with the usage of an integrated Web browser that provides a convenient way to configure the instrument’s functionality.

Rack Mounting

The N1911A/1912A can be mounted in a standard 19-inch rack. Rack mount kits are available as listed below. Support rails are also required for rack mounting. These are normally supplied with the rack and are not included with the rack mount options.

If you are installing an instrument on top of the N1911A/1912A, ensure that the instrument does not obstruct the ventilation holes at the top of the N1911A/ 1912A. If required, use a filler panel above the N1911A/1912A to ensure adequate space for air circulation.

Option Description

N1911A Option 908 Rack mount kit for one instrument

N1911A Option 909 Rack mount kit for two instruments

N1912A Option 908 Rack mount kit for one instrument

N1912A Option 909 Rack mount kit for two instruments

30 Keysight N1911A/1912A User’s Guide

Power Meter and Sensor Capability

NOTE

Your P-Series power meter is compatible with Keysight P-Series, E-Series E9320, E-Series E9300, E-Series E4410, 8480 Series and the N8480 Series power sensors. However, not all sensor and meter combinations have the same features or capabilities. The main differences are as below:

Introduction 1

Features

Average power of CW signal * * * * * *

Average power of modulated signal * * * * *

Peak power * *

Cal factors stored on EEPROM * * * *

>200 readings/sec * * * *

Peak/burst average power * *

Time gated measurements * *

Rising edge trigger * *

Falling edge trigger * *

[a] Not applicable for N8480 Series power sensors with Option CFT

P-Series

N1920

E-Series

E9320

E-Series

E9300

E-Series

E4410

8480 Series

– The E-Series, 8480 Series and N8480 Series power sensors require N1917A/

B/C/D cables when connected to the P-Series power meters.

– The N8480 Series power sensors used in this user’s guide is referring to all

sensors from the N8480 Series unless otherwise stated.

N8480

Series

[a]

Specifications

The specifications for the power meter are listed in Chapter 11, "Specifications

and Characteristics".

Keysight N1911A/1912A User’s Guide 31

1Introduction

Softkey

Channel

Channel A

Channel B

Softkey

Conventions Used in this Guide

The following conventions are used throughout this guide.

This symbol and text represents a labeled key on the power meter front panel.

This symbol and text represents a labeled softkey and is used to indicate you should press the unmarked key beside the displayed text.

Message This text represents a displayed message.

Parameter This is used to represent a parameter, value, or title.

This User’s Guide describes the operation for both the single channel and the dual channel power meter. To identify channels on a dual channel meter a

“Channel”

softkey on an N1911A meter becomes and an N1912A.

When you are asked to press “the channel” in a procedure, make sure you select the relevant channel.

32 Keysight N1911A/1912A User’s Guide

Front Panel Keys and Connections

This section briefly describes the functions of the front panel keys and connectors.

These keys are located to the left of the display.

Key Function

Press this key to preset the power meter. An option list of pre-installed measurement configurations is presented. Select an option and press the confirm key.

Introduction 1

Press this key to control the power meter from the front panel when it is operating via the remote interfaces (when Local Lock Out is not enabled).

Press this key to select the upper or lower measurement window. The selected window is highlighted by a blue line on the right side of the window. Any measurement setup you create is performed in the selected window.

Press this key to choose windowed, expanded, or full-screen display of a numeric measurement. It also provides quick access to the Gate Control screen and menu when a trace window is selected.

Press this key to switch the meter between on and standby. When power is supplied, the background LED is red. Pressing the key, switches the power meter on and the background LED is green.

Keysight N1911A/1912A User’s Guide 33

1Introduction

These keys are located along the lower edge of the display.

Key Function

Press this key to access general configuration-menus, such as GPIB address. You can also access the Self-Test and Table entry menus. The measurement screen remains visible.

Press this key to access the channel configuration menus. Channel parameters such as averaging and offsets are configured from this menu.

Press this key to access the triggering menu. Unless a P-Series or an E-Series E9320A Sensor is connected, all the menu keys are disabled (grayed out).

Press this key to setup relative measurements or set display offsets. Use this key to configure the selected measurement.

Press this key to access the measurement display menu. You can choose the displayed measurement resolution, units and display format.

Use this key together with to configure measurement displays.

34 Keysight N1911A/1912A User’s Guide

Introduction 1

These keys are all associated with the menu labels and data entry. They are located to the right of the display.

Key Function

Press this key to return to the previous screen. This key also cancels pop-up entry.

These unmarked keys are called ‘softkeys’ and are referred to by the text on the display next to them.

For example, during a Preset, you are given an option to confirm the command. Press to continue, that is, press the softkey beside the displayed word ‘confirm’.

The lowest of the unmarked softkeys is used when there is a two page menu to be displayed. For example, a 1 of 2 is displayed beside the key indicating the first page of a two page menu. Press the key to access the next page or second page. (A 2 of 2 is displayed).

Keysight N1911A/1912A User’s Guide 35

1Introduction

These keys and connectors are associated with the measurement channels and are located on the right-hand side of the front panel.

Key Function

The arrow keys are used for navigation around the parameter entry screens. The up and down arrows are used for selecting values from a pop-up list, they can also be used for stepping two values, X Scale and Y Scale. They are also used to enter text, for example, table names.

Press this key to select a highlighted field to allow data entry, check a checkbox and terminate entry of a popup list.

Press this key to access the zero and calibration menus.

36 Keysight N1911A/1912A User’s Guide

Press this key to start and stop the acquisition of the measurement.

Press these keys to enter numeric values in the pop-up fields, for example, the offset values. To complete the entry use the softkey.

Connector Function

The power reference is a 1 mW (0 dBm) 50 MHz signal available from a 50 W type-N connector. It is used for calibrating an 8480, E-Series or N8480 Series power sensor and meter system. If the meter is configured with Option 003, the connector is fitted to the rear panel. The Green LED beside the connector is lit when the calibrator is turned on.

Introduction 1

The sensor input connectors (N1912A shown, the N1911A has one input). If the meter is configured with Option 003, the connectors are fitted to the rear panel.

Keysight N1911A/1912A User’s Guide 37

1Introduction

Disp Type

The Display Layout

Figure 1-1 shows the display layout when two windows are configured in dual

numeric mode.

Pressing , the other display formats are available.

Figure 1-1 Dual numeric display

1 The status reporting line displays messages and the control status of the

power meter. For example, the status can be either RMT (remote, GPIB, USB or LAN operation) or LCL (local, front panel operation).

The message fields indicate ERR for any error conditions that occur or informing you to Please Zero the power sensor.

2 The blue highlight on the right hand side of the window shows it is the

currently selected measurement display line. This measurement line is the Upper Window/Upper Measurement.

3 The measured channel is shown. With a P-Series or an E-Series E9320 power

sensor connected, and channel in trigger mode, the associated gate number is shown.

4 The associated measurement type is shown below the channel and gate

number.

5 This displays the measurement units, either dBm, dB, Watts, or percent (%).

38 Keysight N1911A/1912A User’s Guide

Introduction 1

NOTE

With a P-Series or an E-Series E9320 power sensor connected, a measurement result of –270 dBm indicates the input power level is beyond the sensitivity of the sensor.

6 With a P-Series or an E-Series E9320 power sensor connected, you can make

combined measurements with a single channel meter. A dual channel meter extends this feature across both channels.

7 This displays the number of pages in the current menu. For example, 1 of 2

indicates that there are two pages in the menu and the first page is currently displayed. Pressing the softkey displays the next page, indicated by 2 of 2. (Press the softkey to display the previous menu page.)

8 The available softkey labels are displayed in these four fields. Additionally,

settings associated with the labeled function are displayed under the label.

9 This field displays the menu title. For example, Channel Setup or press

and the Zero/Cal menu is displayed.

Keysight N1911A/1912A User’s Guide 39

1Introduction

14 13

Figure 1-2 Single numeric and analog display

10 Figure 1-2 shows the default display mode of two measurement windows. The

upper measurement window has a blue highlight on the right hand side of the window showing it has been selected.

Using the , , or keys you can change the selection of the

measurement window.

Using the key on numeric measurement results window you can

choose either two rectangular windows, a single enlarged window, or a full screen display by pressing. The display style is applied to the currently selected window or measurement line.

11 The upper window is configured to show a single numeric display.

12 The lower window is configured to show an analog meter which displays the

measurement result and the meter scaling.

13 With a P-Series or an E-Series E9320 power sensor connected, the symbol

shows the trigger state (Free Run), (Stopped), (Negative Slope), or (Positive Slope).

14 The channel measurement frequency.

15 This displays the connected sensor, the offset value, and the acquisition mode

on the channel. On dual channel models it shows for both channels.

40 Keysight N1911A/1912A User’s Guide

Introduction 1

20 19

NOTE

Figure 1-3 Full screen numeric display

16 Figure 1-3 shows a single numeric full screen displaying a relative result.

This field displays Rel if relative mode is on.

17 This field indicates the measurement result is beyond the configured upper or

lower limit. If the measurement is within the limits this field is empty. If the measurement result is less than the minimum limit set, Undr Lmt is displayed. If the measurement result is more than the maximum limit set, Over Lmt is displayed.

18 This field displays Ofs if an offset is set.

19 This field displays Rng Hld if a range is selected.

20 This field displays Dty Cyc if a duty cycle is set.

21 The information in this field is displayed on two lines and depends on the

sensor type, sensor calibration table, frequency dependent offset table currently selected, and the measurement frequency.

The following trace displays are only available when a P-Series or an E-Series E9320 power sensor is connected.

Keysight N1911A/1912A User’s Guide 41

1Introduction

NOTE

Sing Trig

Cont Trig

Trigger

Trace

Free Run

Figure 1-4 Trace display in both windows

22 Figure 1-4 shows both windows configured to trace display mode. This is only

available with an P-Series or an E-Series E9320 power sensor is connected. The captured trace, channel, and scaling are displayed. The lower window is the selected window.

23 The indicates the point on the trace where trigger event occurs.

Single or continuous triggering ( or ) must be selected from the Acqn menu to view a trace window. The Acqn menu is accessed by pressing

, . is disabled when is selected.

42 Keysight N1911A/1912A User’s Guide

Introduction 1

Gate

Marker

NOTE

Figure 1-5 Trace display in single enlarged window in markers mode

Figure 1-5 shows a single enlarged window with the Gate Ctrl menu and

associated tables and markers. The Gate Control is the default display when using trace display.

24 Pressing scrolls through the 4 gates available for each channel.

25 The markers, 1 and 2, indicate the start and end points of the selected gate.

Pressing toggles between the two markers. You can use the and

keys to move the active marker along the trace.

26 The highlighted table, with the green border, shows the time (Time:) and the

instantaneous power level (Pow:) of the active marker at the configured point. A negative time value indicates a measurement before the trigger point.

Gate timing parameters are all related to your chosen trigger point. This may be different from the timing of the triggering event if you have configured a trigger delay. Refer to item No 30 for more information.

27 This table shows the time (Time:) and the instantaneous power level (Pow:) of

the inactive marker at the configured point.

28 The highlighted marker shows the active marker at the configured point.

29 This table shows the width of the gate

average, peak, and peak-to-average ratio power measurements within the

ΔT: (time between the markers), the

active gate.

Keysight N1911A/1912A User’s Guide 43

1Introduction

Select TgDel

Figure 1-6 Trace display in single enlarged window in trigger delay mode

Figure 1-6 shows a single enlarged window with the Gate Ctrl menu and

associated tables and trigger delay.

30 Pressing removes the gate markers and displays the trigger

marker(s). The indicates when the trigger event occurs, whilst shows the delayed trigger point. When the two points coincide only the trigger is

shown.

In the example shown in Figure 1-6, the appears ahead of the as a trigger delay of –5.00 µs has been configured, placing the measurement trigger before the trigger event. You can configure the trigger delay by pressing and entering a numeric value.

To indicate an off-screen trigger event, is displayed. To indicate an off-screen trigger point, is displayed.

31 The selected channel and gate number is displayed.

32 The trigger setting and slope is displayed. Examples shown in Figure 1-6 are

Internal Channel A and a Positive Slope.

44 Keysight N1911A/1912A User’s Guide

Introduction 1

Figure 1-7 Trace display in single enlarged window in trace control mode

Figure 1-7 shows a single enlarged window with the Trace Ctrl menu with

information on the pulse and associated X and Y control.

33 This is the X and Y trace setup fields. Using the or keys you can

highlight the item and change its value.

34 The current settings of the X and Y scale are displayed in this reporting line.

35 This table shows 8 automatic time measurements performed on the first

complete captured pulse after the trigger. The 8 measurements are rise time

, fall time , time to positive occurrence , time to negative

occurrence , pulse period , pulse width , duty cycle 50.0 % and pulse repetitive frequency 12.5 kHz.

Keysight N1911A/1912A User’s Guide 45

1Introduction

Window Symbols and Pop-ups

There are several different graphic symbols and pop-up windows that can occur on the power meter display. These can occur for a variety of reasons, for example:

– An error or warning occurs

– You are required to wait while the power meter carries out a procedure

– You are required to select an entry from a list

– You are required to enter a numeric value

There are three different colors used to signify the pop-up status:

– Green - used to allow data entry

– Orange - used to display information

– Red - used to display an error

Warning symbol pop-up

The warning symbol is displayed either in a pop-up window or directly in the measurement window when such an event occurs. A pop-up window is displayed for approximately two seconds. The text in the pop-up window gives details of the warning type, for example, to indicate that a power sensor has insufficient bandwidth or a previous entered frequency value in a table. Depending on the severity of the warning, the pop-up may be displayed in Orange or Red.

46 Keysight N1911A/1912A User’s Guide

Wait symbol pop-up

The wait symbol is displayed when the power meter is carrying out a procedure and no action is required from you. The symbol appears in a pop-up window. It may appear, for example, during a calibration.

Confirm symbol pop-up

This type of pop-up window is displayed when you are required to press Confirm to verify your previous selection. For example, prior to a Save being carried out.

Introduction 1

Numeric entry pop-up

This type of pop-up window is displayed when you need to modify numeric data. The numeric keys allow you to enter the value.

Keysight N1911A/1912A User’s Guide 47

1Introduction

Text entry pop-up

This type of pop-up window is displayed when you need to modify alphanumeric data, for example, table names. The up/down arrow keys increment and decrement the alphanumeric digit that the cursor is currently positioned. The left/ right arrow keys move the cursor to another alphanumeric digit.

Trace scaling pop-up

This pop-up window is displayed when you are in the Trace Control menu and you can either use the up/down arrow keys for increment and decrement, or the numeric keys to set, the values of the X scale and Y scale.

48 Keysight N1911A/1912A User’s Guide

List pop-up

This pop-up window is displayed when you are required to select an entry from a list. Use the up/down arrow keys to highlight your choice. Press select to complete the entry.

Introduction 1

Keysight N1911A/1912A User’s Guide 49

1Introduction

NOTE

Using the Instrument Web Browser

P-Series power meters network settings can be configured using its Web-based interface (Web browser). The instrument’s Web browser can be opened from Keysight Connection Expert as shown in Figure 1-8.

Alternatively, the instrument’s Web-based interface can also be opened directly from a Web browser by entering the instrument’s IP address or hostname in the browser’s ‘address’ window.

Figure 1-8 Opening the instrument Web interface.

50 Keysight N1911A/1912A User’s Guide

An example of the Web browser is shown in Figure 1-9.

Remote Interfaces

Introduction 1

Keysight N1911A/1912A User’s Guide 51

Figure 1-9 N1912A P-Series power meter Web browser (Welcome Page)

Instrument on the network can be physically identified through the Status message on Remote Interfaces screen by clicking Toggle ID within the Web browser. This changes the status of the Instrument ID to ON or OFF.

Before the instrument identification starts, press

, to

view the Status message.

When Instrument ID is toggled to ON, this causes the Status message “LAN identify start” in Remote Interface screen on the front panel to blink 3 times. When the Toggle ID is selected again, the default Status message “Running” is returned. See Figure 1-10 and Figure 1-11.

1Introduction

Status message “LAN identity start” to blink 3 times when Toggle ID is selected.

Remote Interfaces

Figure 1-10 Status message before Toggle ID is selected.

52 Keysight N1911A/1912A User’s Guide

Figure 1-11 Status message when Toggle ID is selected.

When power meter is configured to LAN, the Lan Status on screen will show the LAN error condition and status of the LAN configuration connection. There are six types of Lan Status messages that may occur. See

Table 1-1. See also Figure 1-12 for the example of Lan Status message.

Table 1-1 Type of Lan Status message

Type of message Description

Introduction 1

Lan: No Fault Status: Initialized

Lan: No Fault Status: Running

Lan: Fault Status: Initialization failed

Lan: Fault Status: Disconnected

Lan: – Status: Restarting

Lan: DHCP Not Available Status: Running

– A valid IP address is successfully obtained using selected LAN

configuration and the network state is initialized.

– A valid IP address is successfully obtained using selected LAN

configuration, while network is running.

– IP conflict occurs, or – IP address failed to be obtained using selected LAN

configuration, or

– No LAN configuration is selected.

– LAN cable is unplugged.

– Restart the network and try to obtain an IP address using

selected LAN configuration.

– Unable to obtain IP address from DHCP server (if user select

DHCP configuration)

– IP address obtained from Auto-IP or manual configuration.

Figure 1-12 Example of Lan Status message

Keysight N1911A/1912A User’s Guide 53

1Introduction

NOTE

For more details on remote interface configuration, refer to P-Series Power Meters Installation Guide.

Editing the Instrument’s LAN Settings

Once communication path to the instrument has been established, the instrument’s LAN configuration can be viewed and modified using the Web browser.

On the Welcome Page, click View and Modify Configuration. This opens the configuration window shown in Figure 1-13.

Figure 1-13 Viewing LAN configuration settings from the Web interface.

54 Keysight N1911A/1912A User’s Guide

Introduction 1

NOTE

Remote Interfaces

1 of 2

LAN Reset

NOTE

LAN Reset

NOTE

To edit parameters shown, click Mod ify Configuration. The Enter Password dialog box appears as shown in Figure 1-14.

Figure 1-14 Password security dialog box.

Click the Submit (accept the default password) and the window opens as shown in Figure 1-15. The default password is “keysight”.

For P-Series power meters with latest firmware upgrade to be LXI-C compliant, a LAN reset needs to be performed to ensure that the password is reset to default. See LAN reset procedure as below.

Procedure:

Keysight N1911A/1912A User’s Guide 55

1 Press , to display the Remote Interfaces screen.

2 Press softkey to display the second page of the Remote I/F menu.

3 Press softkey to reset the LAN settings to default.

When softkey is pressed, it will also change the GPIB address to default.

You can change the password from the Configuring your N1912A Power Meter window as shown in Figure 1-15. Scroll down the Parameter column until you locate the Change Password parameter.

1Introduction

Figure 1-15 Changing the instrument LAN interface configuration

56 Keysight N1911A/1912A User’s Guide

General Power Meter Functions 2

2 General Power Meter

Functions

Setting the Units of Measurement 58 Setting the Measurement Frequency 60 Setting the Resolution 61 Making Relative Measurements 62 Setting the Pulse Reference Levels 64 Setting Offsets 67 Setting Measurement Averaging 78 Step Detection 81 Setting the Video Averaging 82 Setting the Video Bandwidth 84 Setting Measurement Channel Gates 87 Setting up the Channel Trace 92 Setting the Trigger 96 Setting External Trigger for Normal and Average Power Measurement 103 Setting Measurement Limits 118 Setting the Measurement Display 122 Scaling the Analog Display 129 Recorder Output 131 Saving and Recalling Power Meter States 137 Zeroing and Calibrating the P-Series Sensor 140 Presetting the Power Meter 145 Setting the Cable Short/Long 147

This chapter describes the general operation of the P-Series power meter.

Keysight N1911A/1912A User’s Guide 57

2 General Power Meter Functions

Units

dBmWdB

NOTE

Setting the Units of Measurement

The Units menu is used to select the measurement units for the currently selected window. These can either be logarithmic (dBm or dB) or linear (Watt or %) units.

Presetting ( ) the power meter sets the measurement units to dBm (logarithmic units). Tab le 2-1 and Table 2-2 show units that are applicable to each

measurement mode.

Press , . Select the unit of measurement from , , , and

. Softkeys which cannot be selected in your particular mode of operation are

grayed out.

When the measurement unit is set to Watt (W), it is possible that negative power results are displayed when measuring low power levels.

Tab le 2-1 Measurement units - Single channel meters

Measurement Mode Relative Mode Off Relative Mode On

Log dBm dB

Linear Watt %

Tab le 2-2 Measurement units - Dual channel meters

Measurement Mode Relative Mode Off Relative Mode On

Ratio

Difference Log dBm dB

Log dB dB

Linear % %

Linear Watt %

58 Keysight N1911A/1912A User’s Guide

General Power Meter Functions 2

μW

2 of 2

Increment multiplier

Decrement multiplier

Cancel

Increment Multiplier

Decrement Multiplier

NOTE

Selecting units of measurement from the softkeys

In some menus, for example, units in the Trace Setup menu, you are required to enter the units of measurement for power. In some cases, due to the availability of wide power range, the following menu is displayed:

Keysight N1911A/1912A User’s Guide 59

Pressing or increases or decreases the multiplier shown in front of .Pressing after the correct multiplier has been

selected confirms the entry.

Invalid softkeys are grayed out so the value cannot be entered.

2 General Power Meter Functions

MHz

GHz

Setting the Measurement Frequency

Entering the frequency of the RF signal you are measuring optimizes the accuracy and minimizes measurement uncertainty, especially when making comparative measurements between signals.

Procedure

Set the measurement frequency as follows:

1 Press . On dual channel meters select the required channel.

2 Use the and keys to highlight the Frequency value field and press

to display the Frequency pop-up. Use the numeric keypad to enter the

required value in the Frequency pop-up window.

Figure 2-1 Frequency pop-up

3 Confirm your choice by pressing or .

4 Press key to close the Channel Setup screen.

60 Keysight N1911A/1912A User’s Guide

Setting the Resolution

Resolution

The resolution of each of the power meter’s numeric type windows can be set to four different levels (1, 2, 3 or 4).

These four levels represent:

1, 0.1, 0.01, 0.001 dB respectively if the measurement suffix is dBm or dB.

1, 2, 3 or 4 significant digits respectively if the measurement suffix is W or %.

The default value is 0.01 dB (3 digits).

To set the resolution on the currently selected window:

1 Press . The current setting of the resolution is highlighted under the

2 To change this setting, press repeatedly until the required

resolution setting is highlighted.

General Power Meter Functions 2

softkey.

Keysight N1911A/1912A User’s Guide 61

2 General Power Meter Functions

Meas Select

Relative setting

field

Rel field

Original result

Selected Window/

Measuremen

Result field

Making Relative Measurements

Relative mode enables comparison of a measurement result to a reference value. The relative reading, or difference, can be displayed in either dB or % terms. When the measurement result is displayed in % a prefix multiplier may be shown.

Procedure

1 Press to display the Measurement Setup menu.

Figure 2-2 shows a Measurement Setup display and the relative measurement

items labeled.

2 Select the window you wish to set a reference value on by pressing the

key. The currently selected window/measurement is displayed.

3 Use the and keys to highlight the Relative setting field.

62 Keysight N1911A/1912A User’s Guide

Figure 2-2 Typical relative measurement display

4 Press to check the Relative setting field.

5 Confirm that the power meter is measuring the signal you want to use as the

reference. This is displayed under the Result field.

General Power Meter Functions 2

NOTE

Rel indicator

NOTE

6 Press the , , key to highlight the Rel field.

7 Press and the original result value will appear on the right hand side of

the Rel check field.

8 The relative value displayed under Result field will change as the measured

signal varies.

If you return the power meter to display the numeric display, a Rel symbol will be displayed in the measurement window it is applied to.

Figure 2-3 Numeric display

The Rel symbol is not displayed when the associated measurement is displayed in Dual Numeric or Analog format.

Keysight N1911A/1912A User’s Guide 63

2 General Power Meter Functions

1 of 2

Meas Config

Channel A B

NOTE

Setting the Pulse Reference Levels

– Press and proceed to the second page of Sys/Inputs menu by

pressing the softkey.

– Press softkey to display the Measurement Configuration screen.

– Press the softkey to select the desired channel for a dual channel

power meter (N1912A).

Figure 2-4 Measurement configuration screen

Trace Ref Lvl 1 and Trace Ref Lvl 2 are used in calculation of transition durations and occurrences.

Pulse Duration Ref Lvl allows pulse duration measurements between non-standard reference levels.

64 Keysight N1911A/1912A User’s Guide

General Power Meter Functions 2

Trace Ref Lvl 2 = 90%

Pulse Duration Ref Lvl = 50%

Trace Ref Lvl 1 = 10%

Measured pulse duration

Figure 2-5 Pulse duration measurement between two reference levels

1 Use the and keys to highlight the Trace Ref Lvl 1 field.

Keysight N1911A/1912A User’s Guide 65

2 Press to display the Trace Ref Lvl 1 pop-up, and use the numeric

keypad to enter the intended value in the Trace Ref Lvl 1 pop-up window.

Figure 2-6 Trace Ref Lvl 1 pop-up

3 Complete the entry by pressing the softkey.

4 Use the and keys to highlight the Trace Ref Lvl 2 field.

2 General Power Meter Functions

NOTE

5 Press to display the Trace Ref Lvl 2 pop-up, and use the numeric

keypad to enter the intended value in the Trace Ref Lvl 2 pop-up window.

Figure 2-7 Trace Ref Lvl 2 pop-up

6 Complete the entry by pressing the softkey.

7 Use the and keys to highlight the Pul se Duration Ref Lvl field.

8 Press to display the Pul se Duration Ref Lvl pop-up, and use the

numeric keypad to enter the intended value in the Pulse Duration Ref Lvl pop-up.

Figure 2-8 Pulse Duration Ref Lvl pop-up

9 Complete the entry by pressing the softkey.

By default, the Trace Ref Lvl 1, Trace Ref Lvl 2 and Pulse Duration Ref Lvl settings are set to 10 %, 90 % and 50 % respectively.

66 Keysight N1911A/1912A User’s Guide

Setting Offsets

Channel functions

Window functions

Channel A

Cal Factor

Freq Dep Offset

Channel Offset

Channel B

Cal Factor

Freq Dep Offset

Channel Offset

Measurement Highway

Upper Window

Lower Window

Display Offset

Relative

Display Offset

Relative

The power meter can be configured to compensate for a signal loss or gain in your test setup. The power meter allows you to apply offsets at three different points in the measurement path.

General Power Meter Functions 2

Figure 2-9 Simplified measurement path

Figure 2-9 shows that how you can apply a Channel Offset or a

Frequency Dependent Offset prior to any mathematical functions. These allow

you to compensate each channel individually. An overall offset can be applied if required using the Display Offset.

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2 General Power Meter Functions

Offsets

Offset setting field

Offset value field

Setting channel offsets

This gain or loss is applied to the measured power before any mathematical functions, display offsets or relative functions are included.

Offsets are entered in dB and the range is –100 dB to +100 dB.

A positive value compensates for a loss and a negative value compensates for a gain.

Procedure

To enter a channel offset:

1 Press to display the Channel Setup screen. Confirm the channel

requiring setup is displayed.

2 Press to display the Offsets Setup.

3 Use the and keys to highlight the Offset setting field.

68 Keysight N1911A/1912A User’s Guide

4 Press to check the Offset setting field.

Figure 2-10 Typical channel offset display

5 Press to highlight the Offset value field and press to display the

Offset pop-up. Use the numeric keypad to enter the required value in the Offset pop-up window.

6 Confirm your choice by pressing .

General Power Meter Functions 2

Offset indicator

NOTE

7 Press key to complete the offset entry. If either a channel or a display

offset is set, the Ofs indicator is displayed.

Figure 2-11 Channel offset indicator

The Ofs symbol is not displayed when the associated measurement is displayed in Dual Numeric or Analog format.

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2 General Power Meter Functions

Meas Select

Offset setting field

Offset value field

Selected Window/

Measurement

Setting display offsets

This gain or loss is applied to the measured power after any channel offsets or mathematical functions have been included.

Offsets are entered in dB and the range of values is –100 dB to +100 dB. A positive value compensates for a loss, and a negative value compensates for a gain.

Procedure

Enter a display offset on the currently selected window:

1 Press to display the Measurement Setup screen.

2 Select the window you wish to set the offset value on by pressing the

key. The currently selected window/measurement is displayed.

3 Use the and keys to highlight the Offset setting field.

70 Keysight N1911A/1912A User’s Guide

4 Press to check the Offset setting field.

Figure 2-12 Typical display offset display

5 Press to highlight the Offset value field and press to display the

NOTE

Display Offset pop-up. Use the numeric keypad to enter the required value in the Offset pop-up window.

6 Confirm your choice by pressing . Press key to complete the

offset entry.

The Ofs indicator is displayed if Display Offset is selected.

Setting frequency dependent offsets

Frequency dependent offset tables provide a quick and convenient method of compensating for frequency related changes in the response of your test system. Note that when selected, frequency dependent offset corrections are applied IN ADDITION to any correction for sensor frequency response.

The power meter is capable of storing 10 frequency dependent offset tables with a maximum of 80 frequency points each.

General Power Meter Functions 2

To use frequency dependent offset tables:

1 Select the table to be applied to a channel. Refer to “Setting frequency

dependent offsets” on page 71 for further information. If you require to edit the

table refer to “Editing frequency dependent offset tables” on page 74 for further information.

2 If using an 8480 Series, N8480 Series or an E-Series sensor, zero and calibrate

the power meter. The reference calibration factor used during the calibration is automatically set by the power meter from the sensor calibration table (if selected).

3 Specify the frequency of the signal you want to measure. The calibration

factor/offset is automatically set by the power meter from the sensor calibration table (if selected) and the frequency dependent offset table. Refer to “Procedure” on page 72 for further information.

4 Make the measurement.

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2 General Power Meter Functions

Tab les

Freq. Dep. Offset

NOTE

Offsets

Tab les

Freq. Dep. Offset

Offsets

Selecting a frequency dependent offset table

You can select a frequency dependent offset table from the key menu followed by and .

The State column indicates if any frequency dependent offset tables are currently selected. The Offset Tables screen is shown in Figure 2-13.

You can also view which FDO table is being used by pressing the ,

and use the and keys to highlight the FDO Table setting field and

press to display the table.

Procedure

Select an offset table as follows:

1 Press, either:

72 Keysight N1911A/1912A User’s Guide

a , , .

b , and use the and keys to highlight the FDO Table

setting field and press to display the table.

General Power Meter Functions 2

Tab le

NOTE

Tab le

Done

Offset Table A Selected

Figure 2-13 Frequency dependent offset tables display

2 Use the and keys to highlight one of the 10 table titles and press

to highlight .

When no data is contained in the highlighted table, the key is disabled (grayed out).

Keysight N1911A/1912A User’s Guide 73

3 Press to complete the selection of the offset table.

4 Press again to display the measurement screen. Figure 2-14 shows

which offset table is selected.

Figure 2-14 Frequency dependent offset indicator

2 General Power Meter Functions

NOTE

Tab les

Freq. Dep. Offset

5 To change the frequency, press and use the and keys to

highlight the Frequency field.

6 Press to display the Frequency pop-up window. Use the numeric

keypad to enter the required value in the Frequency pop-up window.

7 To confirm your choice, press the appropriate unit softkey.

8 Connect the power sensor to the signal to be measured.

9 The measurement result, including offset, is now displayed.

If the measurement frequency does not correspond directly to a frequency in the sensor calibration table (if selected) and the frequency dependent offset table being used, the power meter calculates the calibration factor and offset using linear interpolation.

If you enter a frequency outside the frequency range defined in the sensor calibration table or the frequency dependent offset table, the power meter uses the highest or lowest frequency point in the appropriate table to set the calibration factor and offset.

74 Keysight N1911A/1912A User’s Guide

Editing frequency dependent offset tables

There are ten frequency dependent offset tables named CUSTOM_A through CUSTOM_J. They are empty of any data when the power meter is shipped from the factory.

You cannot delete any of the 10 existing frequency dependent offset tables or create any additional tables. However, you can enter values into the 10 existing tables. Each frequency dependent offset table can contain a maximum of 80 frequency points.

To view the frequency dependent offset tables currently stored in the power

meter, press , , . The Frequency Dependent Offset Tables screen is displayed as shown in Figure 2-13.

General Power Meter Functions 2

NOTE

Tab les

Freq. Dep. Offset

Edit Table

Editing frequency dependent offset tables requires the following steps:

1 Identify and select the table you want to edit

2 Rename the table

3 Enter the frequency and offset pairs

4 Save the table

Procedure

First select the table you want to edit as follows:

A frequency in the range of 0.001 MHz to 1000.0 GHz can be entered. A calibration factor in the range of 1% to 150% can be entered.

1 Press , , to display the Offset Tbls screen.

2 Choose the table you want to edit using the and keys. Press

to display the Ed it Offset screen as shown in Figure 2-15.

Keysight N1911A/1912A User’s Guide 75

Figure 2-15 “Edit Offset” display with data added

2 General Power Meter Functions

Change

Insert Char

Delete Char

Enter

NOTE

3 Highlight the table title using the and keys. Press and use the

, , and keys to select and change the characters in the Tab le

Name pop-up to create the name you want to use.

Figure 2-16 Edit table title pop-up

Pressing adds a new character to the right of the selected character.

Pressing removes the selected character.

4 Press to complete the entry.

The following rules apply to naming sensor calibration tables:

– The name must consist of no more than 12 characters.

– All characters must be upper or lower case alphabetic characters, or numeric

(0-9), or an underscore (_).

– No other characters are allowed.

– No spaces are allowed in the name.

76 Keysight N1911A/1912A User’s Guide

General Power Meter Functions 2

Insert

Change

GHz

MHz

Change

Done

NOTE

Enter (or edit) the frequency and offset pairs as follows:

1 Press to add a new frequency value (or press to edit). Use the

numeric keypad to enter the required value in the Frequency pop-up window. Complete the entry by pressing the , keys.

2 Enter the new offset value (or press to edit). Use the numeric keypad

to enter the required value in the Offset pop-up window. Complete the entry by pressing the key.

3 Continue adding/editing values until you have entered all the data you require.

4 When you have finished editing the table press to save the table.

If you measure a signal with a frequency outside the frequency range defined in the frequency dependent offset table, the power meter uses the highest or lowest frequency point in the frequency dependent offset table to calculate the offset.

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2 General Power Meter Functions

Minimum sensor power

Resolution setting

Maximum sensor power

Power sensor dynamic range

Number of averages

10 dB

128

256

Setting Measurement Averaging

The power meter uses a digital filter to average power readings. The number of readings averaged can range from 1 to 1024. This filter is used to reduce noise, obtain the desired resolution and to reduce the jitter in the measurement results. Increasing the value of the measurement average reduces measurement noise. However, the measurement time is increased. You can manually select the measurement average or you can set the power meter to auto measurement average mode. The default is AUTO.

When the auto measurement average mode is enabled, the power meter automatically sets the number of readings averaged together to satisfy the filtering requirements for most power measurements. The number of readings averaged together depends on the resolution setting and the power level currently being measured.

Figure 2-17 Typical averaged readings

Figure 2-17 shows the typical number of averages for each range and resolution

when the power meter is in auto filter mode and is set to normal speed mode. P-Series power meters recognize different sensor types when they are connected, and configure suitable averaging automatically.

78 Keysight N1911A/1912A User’s Guide

Resolution is a measurement display function and not a channel function. In the case where a channel is set up in both the upper and lower window and the resolution settings are different, the highest resolution setting is taken to calculate the averaging number.

These four resolution levels represent:

Procedure

Set measurement averaging as follows:

1 Press . On dual channel meters select the required channel. The

2 Use the and keys to select the Filter setting field.

General Power Meter Functions 2

– 1, 0.1, 0.01, 0.001 dB respectively if the measurement suffix is dBm or dB.

– 1, 2, 3 or 4 significant digits respectively if the measurement suffix is

Wor%.

current setting is shown in the Meas Avg field (

Channel Setup screen. The default is

AUTO.

AUTO, MAN, or OFF) on the

3 Press and use the and to step through the available settings.

If you have selected AUTO or OFF proceed at step 7. If you have selected MAN proceed as follows:

4 Use the key to select the Meas Avg: value field.

5 Press to display the Meas Avg Count pop-up.

Figure 2-18 Meas Avg Count pop-up

Keysight N1911A/1912A User’s Guide 79

2 General Power Meter Functions

Enter

6 Use the numeric keys to enter the required value and press .

7 Press key to close the Channel Setup screen.

80 Keysight N1911A/1912A User’s Guide

Step Detection

To reduce the filter settling time after a significant step in the measured power the filter can be set to re-initialize upon detection of a step increase or decrease in the measured power. Step detection can be set in both manual and automatic measurement average modes.

Procedure

Set step detection as follows:

1 Press . On dual channel meters select the required channel.

2 Use the and keys to select the Step Detect setting field.

3 Press to check the step detection to on or off.

4 Press key to close the Channel Setup screen.

General Power Meter Functions 2

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2 General Power Meter Functions

NOTE

Setting the Video Averaging

This feature is only available when a P-Series or an E-Series E9320 power sensor is connected.

Video averaging uses a digital filter to average repetitions of a triggered signal. The number of acquisitions averaged can range from 1 to 256, in multiples of 2

With video averaging the average of a number of acquisitions is calculated to smooth the displayed trace and reduce apparent noise. The measurement requires a continuously repeating signal. Increasing the value of this filter reduces noise but increases the time required to make the measurement.

Procedure

Set the video average as follows:

1 Press . On dual channel meters select the required channel.

2 Use the and keys to select the Video Avg setting field.

3 Press to check the video averaging to on or off.

4 Use the key to select the Video Avg: value field.

5 Press to display the Video Avg Count pop-up.

82 Keysight N1911A/1912A User’s Guide

General Power Meter Functions 2

Figure 2-19 Video Avg Count pop-up

6 Use the and keys to highlight the required Video Avg Count value and

press .

7 Press key to close the Channel Setup screen.

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2 General Power Meter Functions

NOTE

Setting the Video Bandwidth

This feature is only available when a P-Series or an E-Series E9320 power sensor is connected.

Selecting a bandwidth value close to or slightly greater than required by the modulating signal bandwidth can help reduce noise and improve accuracy on peak measurements (see Table 2-3). It can however, reduce the processing speed for long acquisition times.

Tab le 2-3 P-Series Sensor Video Bandwid th Setting

Low: Medium: High: Off

5.0 MHz 15.0 MHz 30.0 MHz >30.0 MHz

The Low, Medium, and High pass band shapes achieved by the video bandwidth settings provide flat filter responses with very sharp cut-off points by applying digital signal processing techniques to ensure accurate power measurement within the specified band.

84 Keysight N1911A/1912A User’s Guide

General Power Meter Functions 2

Amplitude P-Series sensors

Frequency

Approx

-3.5 dB

5 MHz 15 MHz

30 MHz

Low

Med

High

Off

Meter B/W setting

Figure 2-20 Bandwidth filter shapes

When video bandwidth is set to Off, it removes all digital signal conditioning. This provides approximately 3 dB roll off at the maximum sensor’s bandwidth and is best suited for accurate trace capture, minimizing overshoot, and removing any ringing effects caused by the sharp cut-off filters used in the Low, Med and High settings. Figure 2-20 shows the filter shapes associated with the P-Series

Procedure

wideband power sensors.

Set the video bandwidth as follows:

1 Press . On dual channel meters select the required channel.

2 Use the and keys to select the Video B/W setting field.

Keysight N1911A/1912A User’s Guide 85

2 General Power Meter Functions

3 Press to display the Video B/W pop-up.

Figure 2-21 Video bandwidth pop-up

4 Use the and keys to highlight the required Video Bandwid th setting

and press .

5 Press key to close the Channel Setup screen.

86 Keysight N1911A/1912A User’s Guide

Setting Measurement Channel Gates

NOTE

Gate 1

Gate 4

Gate 3

Gate 2

Trigger

This feature is only available when a P-Series or an E-Series E9320 power sensor is connected.

A system of gates, controlled by and referenced to a trigger point, is used to obtain measurement data from a captured trace. The trace data within each gate period is subsequently used for the individual measurement calculations. Up to 4 gates can be set up for each channel. Figure 2-22 shows an example of 4 gates setup to perform the following measurements simultaneously:

– Average power level of the pulse:

Gate 1, average measurement

– Average “off” power level ahead of the pulse:

Gate 2, average measurement

– Peak to average ratio:

Gate 1, peak-to-average measurement

General Power Meter Functions 2

–Pulse drop:

Gate 3, average measurement, minus Gate 4, average measurement

Keysight N1911A/1912A User’s Guide 87

Figure 2-22 Example of measurement gates

2 General Power Meter Functions

NOTE

Gates Setup

NOTE

Figure 2-22 shows measurement results using this example of the gates

placement.

Procedure

This procedure uses the Gates Setup under the Channel Setup menu. Alternatively, you can use a more visual method, when in the Graphical Trace Mode (Gate Control Menu), to set the channel’s Gate Control. (See “Setting the

Trace Display” on page 152).

– Press . The Channel Gate Setup screen is displayed.

Figure 2-23 Gate Setup screen

1 Highlight the Gate Start you want to configure using the , , and

keys.

The gate start time is relative to the trigger event. Positive values set a measurement gate, to a maximum time of 1 second, after the trigger. Negative time gate start values set a measurement gate, to a maximum time of 1 second, before the trigger.

88 Keysight N1911A/1912A User’s Guide

General Power Meter Functions 2

smsμs

2 Press and use the numeric keypad to enter the required value in the

Time Gating Start pop-up window.

Figure 2-24 Time Gating Start pop-up

3 Complete the entry by pressing the required second, millisecond, microsecond

or nanosecond ( , , or ) softkey.

4 Highlight the Gate Length you want to configure using the , , , and

keys.

Figure 2-25 Time Gating Length pop-up

5 Complete the entry by pressing the required second, millisecond, or

microsecond or nanosecond ( , , or ) softkey.

6 Repeat this process until you have setup all the required gates.

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2 General Power Meter Functions

Auto Gate

Auto Gate Settings

NOTE

Gate 1 Ref 1 0.0%

Auto Gate

This feature will automatically set the gates (start and stop times of the user defined time interval) for each measurement relative to the rising and falling edges’ trigger point.

– Proceed to the second page of Gate Ctrl menu and press softkey.

–To change the Auto Gate setup:

1 Press softkey.

90 Keysight N1911A/1912A User’s Guide

Figure 2-26 Auto Gate Settings display

Auto Gate Settings enables the placing of markers (gates) at different positions.

2 Press softkey. The Marker 1 Ref Percentage pop-up is

displayed.

Figure 2-27 Marker 1 Ref Percentage pop-up

General Power Meter Functions 2

Gate 1 Ref 2 0.0%

Ref 1 x PD

Ref 2 x PD

Pulse Duration (PD)

NOTE

Perpetual Off On

3 Use the numeric keys to complete the entry and press softkey.

4 Press softkey. The Marker 2 Ref Percentage pop-up is

displayed.

Figure 2-28 Marker 2 Ref Percentage pop-up

5 Use the numeric keys to complete the entry and press softkey.

Keysight N1911A/1912A User’s Guide 91

Figure 2-29 The placement of gates (markers) in Auto Gating mode

Enabling the softkey allows the gates to be repositioned automatically according to the changes of pulse duration.

2 General Power Meter Functions

NOTE

Trace Setup

Setting up the Channel Trace

This feature is only available when a P-Series or an E-Series E9320 power sensor is connected.

The Trace Setup is the only location where you can change the Y-axis units from dBm to Watts.

Procedure

This procedure uses the Trace Setup under the Channel Setup menu. Alternatively, you can use a more visual method, when in the Graphical Trace Mode (Trace Control Menu), to set the channel’s Trace Control. (See “Setting the

Trace Display” on page 152).

1 Press , to display the Trace Setup menu.

Figure 2-30 Trace setup display

92 Keysight N1911A/1912A User’s Guide

General Power Meter Functions 2

smsμs

2 Use the and keys to highlight the X Start field.

3 Press to display the Trace Start Time pop-up and use the numeric

keypad to enter the required value in the Trace Start Time pop-up window.

Figure 2-31 Trace Start Time pop-up

4 Complete the entry by pressing the required second, millisecond, microsecond

or nanosecond ( , , or ) softkey.

5 Use the and keys to highlight the X Scale field.

6 Press to display the X Scale/Division pop-up.

a Use the numeric keypad to enter the required value in the X Scale/Division

pop-up window.

b Use the and keys to increase or decrease the value.

Figure 2-32 X Scale/Division pop-up

7 Complete the entry by pressing:

a The required second, millisecond, microsecond or nanosecond ( , ,

or ) softkey.

Keysight N1911A/1912A User’s Guide 93

2 General Power Meter Functions

Enter

dBm

b The softkey.

8 Use the and keys to highlight the Units field.

If you want to view the trace in linear scale, use this field. Otherwise the default scale is in logarithmic.

9 Press to display the Units pop-up, and use the and to highlight

Watt or dBm.

Figure 2-33 Trace Units pop-up

10 Press to complete the entry.

11 Use the and keys to highlight the Y Max field.

12 Press to display the Trace Maximum pop-up, and use the numeric

keypad to enter the required value in the Trace Maximum pop-up window.

Figure 2-34 Y scale maximum value pop-up

13 Complete the entry by pressing the or the linear value.

14 Use the and keys to highlight the Y Scale field.

94 Keysight N1911A/1912A User’s Guide

General Power Meter Functions 2

Trace Control

Auto Scale

NOTE

15 Press to display the Y Scale/Division pop-up.

a Use the numeric keypad to enter the required value in the Y Scale/Division

pop-up window.

b Use the and keys to increase or decrease the value.

Figure 2-35 Y Scale/Division pop-up

16 Complete the entry by pressing the or the linear value.

17 Press key to complete the setup and display the measurements

results.

Auto Scale

Auto Scale automatically configures the window’s X-axis and Y-axis to best display the input trace.

1 Press softkey under Gate Ctrl menu.

2 softkey is pressed to accomplish auto scaling.

This feature will work reliably with well behaved pulses. Modulated pulses may cause the meter to auto-scale on the details within the pulse envelope.

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2 General Power Meter Functions

NOTE

Acqn

Trigger status

NOTE

Setting the Trigger

This feature is only available when a P-Series power sensor is connected.

The trigger can be taken from a rising or falling measured power level or controlled externally using the Ext Trig input. Additional control features such as; hold-off, hysteresis, and delay are provided to help you achieve a stable and reliable trigger. To use the measurement gates, the power meter must be triggered.

Press . The Trigger menu is displayed.

The trigger status is displayed below the label in the Trigger menu.

Figure 2-36 shows the power meter display in Free Run mode. In this mode the

meter is not synchronized to any modulated RF signal at the sensor input. Consequently, power levels within the configured time gates are random and the displayed measurement results are not valid.

Figure 2-36 Trigger menu - free run mode

The symbol in the upper window indicates the power meter is in free run mode.

96 Keysight N1911A/1912A User’s Guide

Procedure

Acqn

Sing Trig

Cont Trig

Sing Trig

Cont Trig

Settings

Rising edge source

Channel A is trigger source

1 Press softkey to configure a trigger.

2 Select either or .

3 Press to configure the remaining trigger parameters. The trigger

General Power Meter Functions 2

– is a single shot mode. After triggering, the measurement is

halted, the symbol is displayed. You can start another measurement by

pressing the key.

– is a continuos trigger mode. The symbol or is displayed.

Settings menu have two pages. Figure 2-37 shows page one and Figure 2-40 shows page two.

Keysight N1911A/1912A User’s Guide 97

Figure 2-37 Trigger Setting Menu 1 of 2

To help you quickly check the triggering setup, the current settings for all the trigger parameters are shown with their respective softkey labels.

2 General Power Meter Functions

Source

Ext

Int

Ext

NOTE

Source

Ext

Ch.A

Ch.B

Mode

Source Int

Mode

Norm

AutoLvl

Norm

AutoLvl

Level

Norm

Level

Source

The current setting is shown below the label.

To change the setting press and choose or .

The trigger source is shown beside the trigger symbol when a measurement window is configured in single numeric mode. When an external trigger ( ) is

selected, the power meter can be triggered via the Ext Trig input.

For N1912A, by pressing , you can choose your source through the three different softkeys: , , and .

Mode

The key is only available when trigger is selected.

To change the setting press and choose or .

The current setting is displayed below the label. When is selected you can choose the RF power level transition used as the trigger. The power meter

automatically finds a triggering power level transition when is selected.

Level

is only available when trigger mode has been selected. The current

value is shown below the label. The minimum power level you can enter is limited to 40 dB below the maximum sensor power. To change the setting press

and use the numeric keypad to enter the required value in the Trigger Level

pop-up window to enter the new value.

98 Keysight N1911A/1912A User’s Guide

General Power Meter Functions 2

dBm

Delay

smsμs

NOTE

1 of 2

Figure 2-38 Trigger Level pop-up

Complete the entry by pressing .

Delay

The current setting is displayed below the label. The delay time is applied between the trigger event and all the gate start times. This allows you to time-shift all the gates by the same amount with one setting change. A delay of

up to 1 second can be entered. To enter or change the setting press and use the numeric keypad to enter the required value in the Trigger Delay pop-up window to enter the new value.

Figure 2-39 Trigger Delay pop-up

Complete the entry by pressing the required second, millisecond, microsecond or nanosecond ( , , or ) softkey.

The trigger delay time can also be entered or changed in the Trace Display mode when the Gate Control menu is displayed. See “Setting the Trace Display” on page 152 for further detail.

Press to display the second menu page.

Keysight N1911A/1912A User’s Guide 99

2 General Power Meter Functions

Slope

–

Slope

–

Holdoff

Figure 2-40 Trigger setting menu 2 of 2

Slope

The current setting is displayed below the label and the or symbol is displayed in single numeric display mode. (and ) is used to generate the trigger from an increasing power level. Similarly, (and ) is used to generate the trigger from a decreasing power level. To change the setting, press to highlight or as required.

Holdoff

The current setting is displayed below the label. After a trigger event occurs, the trigger mechanism is disabled for the configured time period. This allows stable triggering to be achieved even when a signal has multiple edges, for example, a TDMA signal with non-constant amplitude modulation. Values up to 400 ms can be configured.

To change the setting press and use the numeric keypad to enter the required value in the Trigger Holdoff pop-up window to enter the new value.

100 Keysight N1911A/1912A User’s Guide

Used Agilent Agilent Used N1912A Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Certification

General Warranty

Warranty Service

Limitation of Warranty

Exclusive Remedies

Restricted Rights Legend

Technology Licenses

Safety Symbols

Safety Considerations

Recommended Calibration Interval

General Safety Information

Environmental Conditions

Regulatory Information

Safety compliance

EMC compliance

Regulatory Markings

Waste Electrical and Electronic Equipment (WEEE) Directive 2002/ 96/EC

Product category:

Table of Contents

List of Figures

List of Tables

1 Introduction

LXI Class-C Compliant Power Meter

Rack Mounting

Power Meter and Sensor Capability

Specifications

Conventions Used in this Guide

Front Panel Keys and Connections

The Display Layout

Window Symbols and Pop-ups

Warning symbol pop-up

Wait symbol pop-up

Confirm symbol pop-up

Numeric entry pop-up

Text entry pop-up

Trace scaling pop-up

List pop-up

Using the Instrument Web Browser

Editing the Instrument’s LAN Settings

General Power Meter Functions 2

Setting the Units of Measurement

Selecting units of measurement from the softkeys

Setting the Measurement Frequency

Procedure

Setting the Resolution

Making Relative Measurements

Procedure

Setting the Pulse Reference Levels

Setting Offsets

Setting channel offsets

Procedure

Setting display offsets

Procedure

Setting frequency dependent offsets

Editing frequency dependent offset tables

Setting Measurement Averaging

Procedure

Step Detection

Procedure

Setting the Video Averaging

Procedure

Setting the Video Bandwidth

Procedure

Setting Measurement Channel Gates

Procedure

Auto Gate

Setting up the Channel Trace

Procedure

Auto Scale

Setting the Trigger

Procedure