ETS-Lindgren HI-6153 User Manual

0 (0)

EMC Field Probes

User Manual

ETS-Lindgren L.P. reserves the right to make changes to any product described herein in order to improve function, design, or for any other reason. Nothing contained herein shall constitute ETS-Lindgren L.P. assuming any liability whatsoever arising out of the application or use of any product or circuit described herein. ETS-Lindgren L.P. does not convey any license under its patent rights or the rights of others.

© Copyright 2006–2013 by ETS-Lindgren L.P. All Rights Reserved. No part of this document may be copied by any means without written permission from ETS-Lindgren L.P.

Trademarks used in this document: The ETS-Lindgren logo, ProbeView, LaserPro, and ProbeView II are trademarks of ETS-Lindgren L.P; Microsoft and Windows are registered trademarks of Microsoft Corporation in the United States and/or other countries.

ii |

Revision Record

MANUAL,EMC PROBES | Part #H-600100, Rev. K

Revision

Description

Date

A

Initial Release

December, 2006

 

 

 

B

Added EC Declaration of Conformity; updated

January, 2007

 

descriptions of I and r commands in Operating

 

 

Protocols; consistency/quality edits

 

 

 

 

C

Added FM5004 Field Monitor to Introduction;

April, 2007

 

added new sections, Typical Configurations

 

 

and HI-6153 Electric Field Probe; updated

 

 

photos, specifications, battery replacement in

 

 

HI-6053 Field Probe; added HI-6153 to Probe

 

 

Stand; updated service procedures, safety

 

 

notices

 

 

 

 

D

Updated H-491269 Probe Stand

November, 2007

 

 

 

E

Added information for HI-6022 and HI-6122

March, 2008

 

probes

 

 

 

 

F

Updated HI-6153 fiber optic connectors;

May, 2008

 

branding updates

 

 

 

 

G

Added HI-4413USB content

October, 2009

 

 

 

Added ETSProbe DLL User Guide

 

 

 

 

H

Removed HI-4422 content; removed

October, 2010

 

FM5004 content

 

 

 

 

I

Added General Safety Considerations

March, 2011

 

 

 

J

Updated About Probe Operation

June, 2011

 

 

 

|iii

Revision

Description

Date

K

 

Updated Specifications: All probes

February, 2013

 

 

 

Added Typical Isotropic Response charts:

 

 

 

HI-6105, HI-6005, HI-6153, HI-6053

 

 

Updated Frequency Response charts:

 

 

 

All probes

 

 

Updated Additional Parts: All probes

 

 

Added laser shutoff information to

 

 

 

Laser-Powered Field Probes

 

 

 

 

 

iv |

Table of Contents

Notes, Cautions, and Warnings...............................................

ix

General Safety Considerations ................................................

x

ETS-Lindgren Product Information Bulletin............................

x

1.0 Introduction ........................................................................

11

Readout Options.......................................................................................

12

HI-6100 Field Monitor .......................................................................

12

HI-6113 Laser Data Interface............................................................

12

HI-4413P Fiber Optic Modem............................................................

13

HI-4413USB Fiber Optic to USB Converter .......................................

13

Optional Tripod .........................................................................................

14

Optional Probe Stand................................................................................

15

About Probe Operation .............................................................................

16

2.0 Typical Configurations......................................................

17

HI-6100 Field Monitor Configuration..........................................................

18

HI-6113 Laser Data Interface Configuration ..............................................

19

HI-4413P / HI-4413USB Configuration......................................................

20

3.0 Maintenance .......................................................................

21

Annual Calibration ....................................................................................

21

Laser Probes and Maintenance of Fiber Optics.........................................

22

Upgrade Policies.......................................................................................

22

Service Procedures ..................................................................................

22

4.0 Laser-Powered Field Probes ............................................

23

HI-6122 Electric Field Probe .....................................................................

24

HI-6122 Specifications ......................................................................

24

HI-6122 Operation ............................................................................

25

HI-6122 Typical Frequency Response ..............................................

26

HI-6122 Typical Isotropic Response..................................................

27

HI-6122 Additional Maintenance .......................................................

28

HI-6122 Additional Parts ...................................................................

28

HI-6153 Electric Field Probe .....................................................................

30

HI-6153 Specifications ......................................................................

30

HI-6153 Operation ............................................................................

32

HI-6153 Typical Frequency Response ..............................................

33

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v

HI-6153 Typical Isotropic Response..................................................

34

HI-6153 Additional Maintenance .......................................................

37

HI-6153 Additional Parts ...................................................................

37

HI-6105 Electric Field Probe .....................................................................

39

HI-6105 Specifications ......................................................................

39

HI-6105 Operation ............................................................................

40

HI-6105 Typical Frequency Response ..............................................

41

HI-6105 Typical Isotropic Response..................................................

42

HI-6105 Additional Maintenance .......................................................

43

HI-6105 Additional Parts ...................................................................

43

5.0 Battery-Operated Field Probes.........................................

45

HI-6022 Field Probe..................................................................................

46

HI-6022 Specifications ......................................................................

46

HI-6022 Operation ............................................................................

47

HI-6022 Power Switch ......................................................................

48

HI-6022 Typical Frequency Response ..............................................

49

HI-6022 Typical Isotropic Response..................................................

50

HI-6022 Additional Maintenance .......................................................

51

HI-6022 Additional Parts ...................................................................

51

HI-6053 Field Probe..................................................................................

53

HI-6053 Specifications ......................................................................

53

HI-6053 Operation ............................................................................

55

HI-6053 Power Switch ......................................................................

56

HI-6053 Controls...............................................................................

57

HI-6053 Typical Frequency Response ..............................................

58

HI-6053 Typical Isotropic Response..................................................

59

HI-6053 Additional Maintenance .......................................................

62

HI-6053 Battery Replacement ...........................................................

62

HI-6053 Additional Parts ...................................................................

64

HI-6005 Field Probe..................................................................................

66

HI-6005 Specifications ......................................................................

66

HI-6005 Operation ............................................................................

67

HI-6005 Power Switch ......................................................................

68

HI-6005 Typical Frequency Response ..............................................

69

HI-6005 Typical Isotropic Response..................................................

70

HI-6005 Additional Maintenance .......................................................

71

vi |

 

HI-6005 Additional Parts ...................................................................

71

6.0 H-491269 Probe Stand .......................................................

73

Probe Stand Dimensions ..................................................................

73

Probe Stand Assembly .............................................................................

74

Parts to Assemble.............................................................................

74

Steps to Assemble............................................................................

75

Probe Stand Operation .............................................................................

78

7.0 Probe Shield Care and Replacement ...............................

81

Appendix A: Warranty .............................................................

83

Appendix B: Series H-491198-01 Battery Charger

 

for NiMH Batteries....................................................................

85

Appendix C: Series H-491198-48 Battery Charger

 

for NiMH Batteries....................................................................

93

Appendix D: Operating Protocols ........................................

101

Appendix E: ETSProbe DLL User Guide .............................

111

About Redistribution.................................................................................

111

Getting Started.........................................................................................

111

DLL Function Calling Conventions ...........................................................

112

Supported Probes and Communications Protocols ..................................

112

Probe Family HI-Any (Auto Probe Detector).....................................

116

Probe Family FP-Any (Auto Probe Detector FP) ..............................

116

Probe Family Virtual.........................................................................

116

Probe Family HI-44xx MS ................................................................

117

Probe Family HI-6005 MS (Medium Speed).....................................

117

Probe Family HI-6005 HS (High Speed)...........................................

118

Probe Family Laser HS (High Speed) ..............................................

118

Probe Types Not Supported.............................................................

118

Quick Start Function Reference ...............................................................

119

ETS_CreateProbe() .........................................................................

119

ETS_ReadFieldSynchronous().........................................................

122

ETS_RemoveProbe().......................................................................

123

Advanced Function Reference.................................................................

124

ETS_Battery() ..................................................................................

124

ETS_CalibrationDate().....................................................................

125

|

vii

ETS_CombinedField() .....................................................................

126

ETS_Field() .....................................................................................

127

ETS_Firmware() ..............................................................................

128

ETS_GetErrorDescription() ..............................................................

129

ETS_GetUnitsString() ......................................................................

130

ETS_InitiateReadBattery() ...............................................................

131

ETS_InitiateReadField()...................................................................

132

ETS_InitiateReadTemperature() ......................................................

133

ETS_IsOperationComplete()............................................................

134

ETS_Model()....................................................................................

135

ETS_ProbeName() ..........................................................................

136

ETS_ReadBatterySynchronous() .....................................................

137

ETS_ReadTemperatureSynchronous() ............................................

138

ETS_SerialNumber()........................................................................

139

ETS_SetRange() .............................................................................

140

ETS_SetUnits()................................................................................

141

ETS_TemperatureC() ......................................................................

142

ETS_LaserCurrent().........................................................................

143

ETS_Version() .................................................................................

144

ETS_SupplyVoltage() ......................................................................

145

ETS_LaserTemperature() ................................................................

146

ETS_ZeroProbe().............................................................................

147

Status Codes ...........................................................................................

148

Appendix F: EC Declaration of Conformity.........................

151

viii |

Notes, Cautions, and Warnings

Note: Denotes helpful information intended to provide tips for better use of the product.

Caution: Denotes a hazard. Failure to follow instructions could result in minor personal injury and/or property damage. Included text gives proper procedures.

Warning: Denotes a hazard. Failure to follow instructions could result in SEVERE personal injury and/or property damage. Included text gives proper procedures.

See the ETS-Lindgren Product Information Bulletin for safety, regulatory, and other product marking information.

|ix

General Safety Considerations

LASER HAZARD. Laser power up to 150 mW at

830 nm may be accessible at the fiber connector of the laser. However, the laser beam itself is not hazardous as the interlock ensures that the exposure time will be less than 30 ms.

See the ETS-Lindgren Product Information Bulletin for safety, regulatory, and other product marking information.

ETS-Lindgren Product Information Bulletin

See the ETS-Lindgren Product Information Bulletin included with your shipment for the following:

Warranty information

Safety, regulatory, and other product marking information

Steps to receive your shipment

Steps to return a component for service

ETS-Lindgren calibration service

ETS-Lindgren contact information

x|

1.0 Introduction

The ETS-Lindgren EMC Field Probes embody the latest innovations in isotropic sensor design and low-noise, miniaturized electronics. Each probe is a fully intelligent sensor enabling fast and accurate EMF measurements with industry-leading performance specifications. Optical coupling to a variety of readout options makes these probes ideally suited for a wide range of field monitoring applications.

The EMC field probes include laser-powered (laser) probes and battery-operated probes. This manual includes operating information and specifications for these probe models:

Laser-Powered HI-6122

HI-6153

HI-6105

Battery-Operated HI-6022

HI-6053

HI-6005

ETS-Lindgren may substitute a similar part or new part number with the same functionality for another part/part number. Contact ETS-Lindgren for questions about part numbers and ordering parts.

Introduction

|

11

Readout Options

HI-6100 FIELD MONITOR

The HI-6100 Field Monitor accepts inputs from up to any four probes, and analyzes and displays information on a user-configurable LCD.

The HI-6100 may be used in conjunction with both the laser and battery-operated probes.

HI-6100 Field Monitor

For information on using the HI-6100 with ETS-Lindgren probes, see HI-6100 Field Monitor Configuration on page 18.

HI-6113 LASER DATA INTERFACE

The laser probes and the HI-6113 Laser Data Interface together communicate with ProbeView™ Laser software through a USB port on the computer.

HI-6113 Laser Data Interface

For information on using the HI-6113 with ETS-Lindgren probes, see HI-6113 Laser Data Interface Configuration on page 19.

12

|

Introduction

HI-4413P FIBER OPTIC MODEM

The battery-powered probes use the HI-4413P Fiber Optic Modem to communicate with ProbeView II™ software through a serial port on the computer.

HI-4413P Fiber Optic Modem

For information on using the HI-4413P with ETS-Lindgren probes, see

HI-4413P / HI-4413USB Configuration on page 20.

HI-4413USB FIBER OPTIC TO USB CONVERTER

The battery-powered probes use the HI-4413USB Fiber Optic to USB Converter to communicate with ProbeView II™ software through a USB port on the computer.

HI-4413USB Fiber Optic to USB Converter

For information on using the HI-4413USB with ETS-Lindgren probes, see

HI-4413P / HI-4413USB Configuration on page 20.

Introduction

|

13

Optional Tripod

The H-491009 Dielectric Tripod is the preferred method for mounting field probes for making unperturbed field measurements. It provides stable placement for one probe, and includes a 1/4–20 UNC threaded stud for mounting any ETS-Lindgren probe with a tripod mount. It is designed with an adjustable center post and a rotating mount.

14

|

Introduction

Optional Probe Stand

The ETS-Lindgren Probe Stand may also be used in testing configurations. The probe stand supports up to two probes. For complete information on probe stand assembly and operation, see

H-491269 Probe Stand on page 73.

Introduction

|

15

About Probe Operation

For information on reducing measurement uncertainties and selecting the best field probe for your application see the white paper Practical Considerations for Radiated Immunities Measurement using ETS-Lindgren EMC Field Probes. This document is located on the ETS-Lindgren website at: www.ets-lindgren.com/whitepapers.

For complete information on setting up and operating the field monitor, software, and other devices available for the laser and battery-operated field probes, please see the documentation provided with those products.

Field probes are nominally rated for operation within a specific frequency range, but may also respond to signals above and below those frequencies. A probe may exhibit response to frequencies below the lower end of the range, and may also respond to frequencies above the upper end of the range, though not consistently or predictably.

Keep all conductive objects away from laser-powered and battery-operated probes. Conductive objects in the proximity of the probe can distort the near field and compromise measurement accuracy. If the application requires measurements from a fixed position, always mount the probe on a non-metallic platform, using non-metallic screws.

16

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Introduction

2.0 Typical Configurations

A variety of configurations are available with the field monitors, probes, and other devices. Following are typical examples of how the components can be assembled to accommodate most testing environments.

Typical Configurations

|

17

HI-6100 Field Monitor Configuration

The following diagram illustrates the ETS-Lindgren probes that may be used with the HI-6100 Field Monitor. In the diagram, the FM in HI-6153FM, for example, refers to Field Monitor Kit. As a kit, the probe includes an interface card.

18

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Typical Configurations

HI-6113 Laser Data Interface Configuration

The following diagram illustrates the ETS-Lindgren probes that may be used with the HI-6113 Laser Data Interface (LDI). In the diagram, the USB in HI-6153USB, for example, refers to USB Kit. As a kit, the probe includes all components required to operate the probe with the HI-6113.

Typical Configurations

|

19

HI-4413P / HI-4413USB Configuration

The following diagram illustrates the ETS-Lindgren probes that may be used with the HI-4413P Fiber Optic Modem or the HI-4413USB Fiber Optic to USB Converter.

20

|

Typical Configurations

3.0 Maintenance

WARRANTY

Before performing any maintenance, follow the safety information in the ETS-Lindgren Product Information Bulletin included with your shipment.

Maintenance of probes is limited to external components such as cables or connectors.

Warranty may be void if the housing is opened.

If you have any questions concerning maintenance, contact ETS-Lindgren Customer Service.

If you have one of the following probes, see Probe Shield Care and Replacement on page 81: HI-6122, HI-6022, HI-6105, or HI-6005 Field Probe.

Annual Calibration

See the Product Information Bulletin included with your shipment for information on ETS-Lindgren calibration services.

Maintenance

|

21

Laser Probes and Maintenance of Fiber Optics

The fiber optic connectors and cables used with laser-powered probes can be damaged from airborne particles, humidity and moisture, oils from the human body, and debris from the connectors they plug into. Always handle connectors and cables with care, using the following guidelines.

Before performing any maintenance, disconnect the fiber optic cables from the unit and turn off power.

When disconnecting fiber optic cables, apply the included dust caps to the ends to maintain their integrity.

Before connecting fiber optic cables, clean the connector tips and in-line connectors.

Before attaching in-line connectors, clean them with moisture-free compressed air.

Failure to perform these tasks may result in damage to the fiber optic connectors or cables.

Upgrade Policies

Periodically, probes are upgraded to enhance functionality. Contact ETS-Lindgren Customer Service for the upgrade status of your probe.

Service Procedures

For the steps to return a system or system component to ETS-Lindgren for service, see the Product Information Bulletin included with your shipment.

22

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Maintenance

4.0 Laser-Powered Field Probes

The HI-61XX Series LaserPro™ Field Probe is a laser-powered probe, an excellent tool for electric field mapping, industrial monitoring, and EMC field measurements.

The HI-61XX Series probes contain a photo-voltaic converter that provides power to the probe circuitry when sufficient light power is received by the converter. The light power is generated by a laser in the HI-6113 Laser Data Interface, and is transmitted to the converter through an optical fiber in the duplex fiber optic cable. The probe communicates with the HI-6113 through this fiber optic cable. Receiving power from the HI-6113 allows for unlimited test times.

The probe system incorporates a safety interlock mechanism that turns off the laser if the HI-6113 does not receive data from the probe within a specified time frame. The safety mechanism is intended to prevent injury from the laser if the HI-6113 issues a command to turn on the laser while the fiber optic cables are disconnected, improperly connected, cut, or damaged.

The laser driver in the HI-6100 Field Monitor also incorporates this safety interlock mechanism, and operates in the same manner.

The HI-6100 Field Monitor may also be used with the HI-61XX Series for RFI/EMC testing. For more information on readout options, see page 12.

Laser-Powered Field Probes

|

23

HI-6122 Electric Field Probe

 

 

 

 

The ETS-Lindgren HI-6122 Field Probe

 

 

 

 

provides broadband frequency coverage

 

 

 

 

and wide dynamic range that satisfies the

 

 

 

 

demands of most test requirements.

 

 

 

 

The frequency response of the HI-6122 is

 

 

 

 

10 kHz to 1 GHz, and the dynamic range is

 

 

 

 

2 to 800 Volts per meter (V/m).

HI-6122 SPECIFICATIONS

 

 

 

 

 

 

 

 

Dynamic Range:

 

2.0 – 800 Volts per meter (V/m)

 

 

 

 

 

 

 

 

 

 

 

Ranges:

 

Single

 

 

 

 

 

 

 

 

 

 

 

Typical Frequency Response:

 

10 kHz–1 GHz

 

 

 

 

 

 

 

10 kHz–30 kHz: +0.5 dB, -2.5 dB

 

 

 

 

 

 

 

 

30 kHz–1 GHz: ±1 dB

 

 

 

 

 

 

Typical Frequency Response

 

10 kHz–1 GHz: ±0.9 dB

 

 

 

 

 

with Correction:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Linearity:

 

±0.5 dB @ 27 MHz

 

 

 

 

 

 

 

 

 

 

 

Isotropicity:

 

±0.5 dB @ 400 MHz

 

 

 

 

 

 

 

 

 

 

 

Overload Withstand:

 

> 1,500 V/m CW

 

 

 

 

 

 

 

 

 

 

24 |

Laser-Powered Field Probes: HI-6122 Electric Field Probe

 

Physical Interface:

 

Duplex optical fiber

 

 

 

 

 

 

 

(62.5 micron multimode)

 

 

 

FC connectors for laser cable,

 

 

 

integral 1-m optical cable

 

 

 

ST connector for transmitter cable,

 

 

 

integral 1-m optical cable

 

 

 

 

 

 

 

 

 

Probe Mount:

 

1/4–20 UNC tapped hole (internal thread)

 

 

 

 

 

 

 

 

 

Environmental

 

 

 

 

Operating Temperature:

 

10°C to 40°C

 

 

 

 

 

50°F to 104°F

 

 

 

 

 

 

 

Humidity:

 

5% to 95% relative humidity,

 

 

 

 

 

non-condensing

 

 

 

 

 

 

 

Dimensions

 

 

 

 

Housing:

 

32 mm x 32 mm x 32 mm

 

 

 

 

 

1.26 in x 1.26 in x 1.26 in

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Probe Shields:

 

36 mm (1.42 in)

 

 

 

 

 

 

 

 

 

Weight:

 

80 g (2.82 oz)

 

 

 

 

 

 

 

 

HI-6122 OPERATION

The HI-6122 can be used with the HI-6100 Field Monitor. It can also be connected to a personal computer using an optional HI-6113 Laser Data Interface and ProbeView™ Laser software.

The HI-6122 is a true 3-axis probe. When requested, X, Y, Z, and total field data can be reported.

For a list and description of communication and information transfer protocols, including command structure, probe commands, and HI-6113 commands, see

Appendix D: Operating Protocols on page 101.

Laser-Powered Field Probes: HI-6122 Electric Field Probe

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25

ETS-Lindgren HI-6153 User Manual

HI-6122 TYPICAL FREQUENCY RESPONSE

TEM Cell and GTEM! – Field Level 20 V/m

26 |

Laser-Powered Field Probes: HI-6122 Electric Field Probe

HI-6122 TYPICAL ISOTROPIC RESPONSE

Isotropic response measured in a 20 V/m field at 400 MHz.

Laser-Powered Field Probes: HI-6122 Electric Field Probe

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27

HI-6122 ADDITIONAL MAINTENANCE

Maintenance of the HI-6122 is limited to external components such as cables, connectors, and probe shields. For information on fiber optic cable and connector maintenance, see Laser Probes and Maintenance of Fiber Optics on page 22. To replace the probe shields, see Probe Shield Care and Replacement on page 81.

Any maintenance or calibration task requires probe disassembly, which may void your warranty. Only ETS-Lindgren service personnel should perform these tasks. To avoid problems with your warranty, contact ETS-Lindgren Customer Service before performing any maintenance.

For complete information on maintenance and calibration, see Maintenance on page 21.

HI-6122 ADDITIONAL PARTS

Use the following table to order replacement or optional parts for the HI-6122.

 

Part Description

 

 

Part Number

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Probe shield replacement Kit

 

112955

 

 

includes:

 

 

 

 

 

 

Three probe shields (cones)

 

 

 

 

 

One each X, Y, and Z label

 

 

 

 

 

 

Six screws

 

 

 

 

 

 

 

 

 

 

Cable Assembly, Fiber, FC-FC,

 

 

H-491263-xx

 

ST-ST

 

 

 

(xx=length in meters)

 

 

 

 

 

 

 

 

 

 

 

 

FC to FC Inline Connector

 

 

H-23861521000

 

 

 

 

 

 

ST to ST Inline Connector

 

708027

 

 

 

 

 

 

 

Carrying Case

 

 

H-491291

 

 

 

 

 

 

HI-6100 Field Monitor

 

 

HI-6100

 

 

 

 

28

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Laser-Powered Field Probes: HI-6122 Electric Field Probe

 

Part Description

 

 

Part Number

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Laser Data Interface

 

 

HI-6113

 

 

 

 

 

 

Tripod, Dielectric

 

 

H-491009

 

 

 

 

 

 

Probe Stand

 

 

H-491269

 

 

 

 

 

 

Fiber Optic Cleaning System

 

 

H-34FO1

 

 

 

 

 

 

Laser System Fiber Optic

 

112333

 

 

Maintenance Kit

 

 

 

 

 

 

 

 

 

 

Probe Carrier for H-491269

 

 

H-491276

 

Probe Stand

 

 

 

 

 

 

 

 

 

 

Laser-Powered Field Probes: HI-6122 Electric Field Probe

|

29

HI-6153 Electric Field Probe

The ETS-Lindgren HI-6153 Field Probe provides broadband frequency coverage and wide dynamic range that satisfies the demands of most test requirements.

The frequency response of the HI-6153 is 10 MHz to 40 GHz, and the dynamic range is 2 to 800 Volts per meter (V/m).

HI-6153 SPECIFICATIONS

 

Dynamic Range:

 

2.0–800 Volts per meter (V/m)

 

 

 

 

 

 

 

 

Ranges:

 

 

Single

 

 

 

 

 

 

 

 

 

 

 

 

Typical Frequency Response:

 

10 MHz–40 GHz

 

 

 

 

10 MHz–100 MHz: +3 dB, -4 dB

 

 

 

 

 

 

 

 

100 MHz–1 GHz: +3 dB, -0.5 dB

 

 

 

 

1 GHz–18 GHz: +4 dB, -2 dB

 

 

 

 

18 GHz–40 GHz: +3.5 dB, -4.5 dB

 

 

 

 

 

 

 

 

 

Typical Frequency Response

 

10 MHz–18 GHz: ± 0.9 dB

 

with Correction:

 

 

 

18 GHz–40 GHz: ± 1.1 dB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Linearity:

 

 

±0.5 dB @ 1 GHz

 

 

 

 

 

 

 

 

 

 

 

Isotropicity:

 

±1.0 dB < 18 GHz

 

 

 

 

 

 

 

30 |

Laser-Powered Field Probes: HI-6153 Electric Field Probe

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