Transcript
Page 1: Techniques to Reduce Femtocell Manufacturing Test Timerfmw.em.keysight.com/mod/pdf/solutions_small_cell_test_ref_soln... · 2350 MHz 2350 MHz 2350 MHz 2310 MHz 2310 MHz 2610 MHz 2610MHz

Techniques to Reduce FemtocellManufacturing Test Time

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PageAgenda– Femtocell test challenges

– Improving Test Time and Throughput

• What is Test time ?

• Test faster with Measurement Sequencer techniques (SAMM)

• Increase test throughput with Pipeline and Ping Pong

– Introduction to the Keysight E6650A EXF Femtocell test solution

Wireless Symposium 2

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PageAgenda– Femtocell test challenges

– Improving Test Time and Throughput

• What is Test time ?

• Test faster with Measurement Sequencer techniques (SAMM)

• Increase test throughput with Pipeline and Ping Pong

– Introduction to the Keysight E6650A EXF Femtocell test solution

Wireless Symposium 3

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0

5,000,000

10,000,000

15,000,000

20,000,000

25,000,000

2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018

Cellular Infrastructure Equipment ‐ Units

3G/4G Small Cell

3G/4G Femtocell

LTE ‐ Macro

2G/3G BSC

3G RRH ‐ Macro

2G/3G BTS ‐ Macro

Setting the Scene, The Femtocell Market

Femtocell and Small Cell units expected to grow at 46% CAGR from 2014-2018 to account for 90% of all mobile infrastructure equipment units sold in 2018.

Wireless Market Forecasts

Source: Infonetics Research, Dec 2014, Feb 2015, Mar 2015

Long-term drivers• Demand for indoor coverage• RAN offload for operators to

improve network capacity• Need for consistent mobile

broadband• ‘Home-zone’ applications/tariffs• >$100 per unit cost for residential

Phase 1

Phase 2

Phase 3

Phase 4

We are here

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Femtocell Manufacturing Test Requirement and Challenges

Calibration• Tx – Frequency, Power, IQ• Rx -- Uplink & Monitor Gain

Verification tests • Tx – Power, OBW, ACP,

EVM, SEM, Freq error• Rx -- RSSI, BER

Wireless Symposium 5

Test Items & Requirements Test Challenges

Multiple Cellular Radio formats

3GPP Specified tests have strict requirements for conformance

Incremental WLAN Test

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PageAgenda– Femtocell test challenges

– Improving Test Time and Throughput

• What is Test time ?

• Test faster with Measurement Sequencer techniques (SAMM)

• Increase test throughput with Pipeline and Ping Pong

– Introduction to the Keysight E6650A EXF Femtocell test solution

Wireless Symposium 6

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How to Reduce Femtocell Manufacturing Test Time?

Wireless Symposium 7

Calibration time

Mode switch and Boot time

Txmeasurement

time

Rx measurement

time

One device, One test Set : Measurement and Sequencer Techniques

Multiple Devices, One test Set : Smart Scheduling Techniques

Cal Mode Tx Rx Cal Mode Tx Rx

Reduce measurement timereduce Cal time Mode Switch time

Sequencer (analyzer and Source)

Smarter Scheduling method

Cal Mode Tx Rx

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Traditional Signal Analyzer Measurement Concept

• Reports back a single measurement result every time • Need to switch between two measurements

Wireless Symposium

Burst 1 Burst 2 … Burst nMeas 1 X1Meas 2 X2… …Meas n Xn

Acquisition 1 Acquisition 2 Acquisition n

8

Single acquisition single measurement (SASM)

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Parallel Measurement Concept

Approach 1 : “Combined” measurements under one measurement mode

• Acquisition length is one burst• Reports multiple measurement results• Measurement BW is limited by hardware

Wireless Symposium 9

Two approaches to improve the measurement speed

Burst 1 Burst 2 … Burst nMeas 1 X1 X2 XnMeas 2 X1 X2 Xn… … X1 X2 XnMeas n X1 X2 Xn

Acquisition 1 Acquisition 2 Acquisition n

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Sequencer Measurement Concept

2nd Approach : Single acquisition multiple measurements(SAMM)

Acquisition length is n*bursts Report multiple measurement results No limitation on measurement BW Supports frequency fast switch and multi-burst results

Wireless Symposium

Burst 1 Burst 2 … Burst n

Burst n+1

Burst n+2 … Burst n+m

Meas 1 X1 X1 X1 X1 X2 X2 X2 X2Meas 2 X1 X1 X1 X1 X2 X2 X2 X2

… … X1 X1 X1 X1 X2 X2 X2 X2Meas N X1 X1 X1 X1 X2 X2 X2 X2

Acquisition 1 Acquisition 2

10

Further approach to improve the measurement speed

Same time, Many More

measurements!

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There are two independent sequencers in the EXF Wireless Test Set for Femtocell E6650A:

Source List Sequencer Sequence Analyzer List Sequencer

Each sequencer can work individually or in Synch with the other.

• Both sequencers can synchronize with each other by the use of internal triggers

• Both Sequencers can be controlled by a single sequence

Test Faster with the Sequencer Technique

Page 11

11Wireless Symposium

Sequencer Basics

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Sequence Analyzer Key Parameters– Acquisition Parameters

• Supports up to 512 pre-configurable hardware states.

Wireless Symposium 12

– Analysis Parameters• Up 1000 steps per sequence

• Defines part of the capture memory to use as a measurement step

• Each State has:• Radio Format• Frequency• Gain• Acquisition

duration• Transition Time

• Trigger Type• Trigger Delay• Output Trigger• Max Acquisition

length 2GB =256MSa

Each step has: • Analysis Offset (from Acquisition start) - Expected Power at DUT • Analysis Interval - Measurement Selection• Analysis Number

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Pre-Trigger

Basic Terminology for Sequence Analyzer

Sequence

Acquisition Acquisition

Trig Event TransitionTime

AnalysisIntervals

Acquisition Duration Data is returned to App after FPGA analysis here

Wireless Symposium 13

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Red Bar = Acquisition vs. Blue Bar = Analysis Step

Wireless Symposium 14

RFBIMM

Contiguous samplesStored in capture memory

Step 1 Step 2 Step 3 Step 1 Step 2 Step 3 Step 4 Step 5

Freq Changed.Samples gated out(Not stored)

Acq 1 time

TransitionInterval

Trig delay

Trig event locationStored

Conceptual StepBeginning = Trig event +Trig Delay

Multiple Extractions of the same data allowed (and with different lengths)

E-Atten changeRequired, hence new Acquisition

Step 1 Step 2

SequenceAcquisition1 Acquisition2 Acquisition3

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Source List Sequencer• Signal is generated in ARB waveform mode

• Setup a waveform sequence with the same or different waveforms to cover one or multiple formats

• Each waveform signal can be configured with a different frequency and amplitude by using a new step in the sequence

Wireless Symposium 15

– Key Parameters

• Waveform Sequence

Segment

Repetition

• Trigger

Trigger Source

Trigger delay

Trigger type

Polarity

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How do you Co-ordinate the Sequencers ?

Wireless Symposium 16

DUT

List Sequence from DUT1. Channel 1 Tx, 0dBm, E-TM 1.12. Channel 1 Tx, -10dBm, E-TM 1.1 3. Channel 1 Tx, 0dBm, E-TM 3.1 4. Channel 2 Rx

List Sequence measurements by EXF1. Channel 1 Power2. Channel 2 Power, EVM, Spectral mask3. Channel 3 Power4. Channel 2 RX Test, -100dBm, FRC A1-1

TestController

Ethernet Hub

List Sequence EXF E6650A

“BERResult”

“Measurement Results”

“Start Sequencer”

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Typical Sequencer Test Plan

Wireless Symposium

17

Power, EVM

Power

-20 dBm

+24 dBm

120 ms

120 ms

120 ms

Power, SEM, ACLR, EVM,Time error, Freq error, OBW, PCDE

-60 dBm

2310 MHz 2310 MHz 2350 MHz 2350 MHz 2390 MHz 2390 MHz 2610 MHz 2610 MHz

2310 MHz

Power, EVM

Power

-20 dBm

+24 dBm

120 ms

120 ms

120 ms

Power, SEM, ACLR, EVM,Time error, Freq error, OBW, PCDE

-60 dBm

Power, EVM

Power

-20 dBm

+24 dBm

120 ms

120 ms

120 ms

Power, SEM, ACLR, EVM,Time error, Freq error, OBW, PCDE

-60 dBm

Power, EVM

Power

-20 dBm

+24 dBm

120 ms

120 ms

120 ms

Power, SEM, ACLR, EVM,Time error, Freq error, OBW, PCDE

-60 dBm

2310 MHz2310 MHz 2610MHz2610MHz2610 MHz2350 MHz2350 MHz2350 MHz 1900 MHz1900 MHz1900 MHz

Source output Uplink signal as a sequence to DUT

Tx

Rx

Triggers / Synch

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Fastest Measurement Speed

18

Sequence analyzer – LTE 20 MHz LTE-FDD E-TM3.1 example

EXF Sequencer

EXF sequencer: Typical Testplan

34x faster than MXA one-button application

Wireless Symposium

MXA one-ButtonTest Equipment Setup

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Increase Test Throughput with Pipeline

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“Pipeline” Test Scenario

Serial Test: 2 DUTsSerial Test: 2 DUTs

Tx-DUT1 Rx- DUT1Boot-DUT1DUT 1DUT 2

Tx-DUT2 Rx- DUT2Boot-DUT2

Pipeline: Test DUT1 Tx, DUT2 Rx in parallel; then swapPipeline: Test DUT1 Tx, DUT2 Rx in parallel; then swap

Boot-DUT1DUT 1DUT 2 Boot-DUT2

Time saved

DUT 1

DUT 2

Wireless Symposium

Tx-DUT1 Rx- DUT1Tx-DUT2Rx- DUT2

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TRX1TRX1

Increase Test Throughput with Ping Pong

20

“Ping Pong” Test ScenarioOn a 16 port Test Set, you can connect 8 two-antenna (1 Tx/Rx, 1 Rx diversity) DUTsOn a 16 port Test Set, you can connect 8 two-antenna (1 Tx/Rx, 1 Rx diversity) DUTs

DUT 2

1

Boot up

Cellular Cal

Cellular Tx

Cellular Rx

Cellular Rx Diversity

Tx

Tx

Rx

Rx

RxTx

RxD

RxD

RxD

Boot

Boot

Boot

Boot

Cal

Cal

Cal

Cal Tx Rx RxDDUT 1

Next

1

2

Unload/Load

Unload/Load Unload/Load

Wireless Symposium

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Combination: Ping Pong & Pipeline

21Keysight Restricted

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PageAgenda– Femtocell test challenges

– Improving Test Time and Throughput

• What is Test time ?

• Test faster with Measurement Sequencer techniques (SAMM)

• Increase test throughput with Pipeline and Ping Pong

– Introduction to the Keysight E6650A EXF Femtocell test solution

Wireless Symposium 22

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Traditional Femtocell Tx/Rx Test Setup

Wireless Symposium

MXG + XSA approach

Ethernet Hub

10 MHz

40 ms TTI Trigger Event

1 to 50 MHz Frequency Ref*

UL

DL

AttenDuplexer

Femtocell

MXA/EXA Signal Analyzer

MXG Signal Generator

Ethernet Hub

Classic

23

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New Femtocell Tx/Rx Test Setup for Manufacturing

24Wireless Symposium

EXF Wireless Test Set for Femtocell approach

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EXF

New Femtocell Tx/Rx Test Setup for Manufacturing

Wireless Symposium

Femtocell One-Box Tester approach

Ethernet Hub

40 ms TTI Trigger Event

10 MHz Frequency Reference

DL

Atten

FemtocellEthernet

Hub

Economic

1 UP TRX

RFIO 1

RFIO 2

Trig in

Ref in

EXF E6650A Wireless Test Set for Femtocell

25

LAN

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Keysight Femtocell Test Platforms for R&D, DVT & Mfg

E6650A EXF- Accelerate FemtocellManufacturing

• Lower overall cost of test• Test multi-format designs • Compatible with X-Series analyzers

and generator code

M9381A VSG &M9391A/M9393A VSA*

Simplify Signal Creation

Keysight Signal Studio X-Series Measurement Applicationsand Downlink Sequencer

Reduce engineering test development timeControl, Cal, Test

Chipset Software

Fast and Accurate Measurements

ManufacturingR&D and DVT

EXG/MXG

EXA/MXA

Signal Generator & Analyzer Modular PXI VSG & VSA One-Box Tester (OBT)

*DL sequencer and chipset control software not available on PXI modular products today

26Wireless Symposium

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Fastest Measurement Speed

27

Advanced Sequence Analyzer

Execute test plans at the chipset’s highest achievable speed

Flexible & Capable• Designed for ultra-fast device calibration and

verification• Enables single acquisition with multiple

measurements • Allows precise control of

• test intervals• test levels• measurement timing

Fast Measurements

DL Sequence Analyzer

Wireless Symposium

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Highest Throughput and Yield

28

Maximize throughput with raw HW speed and advanced sequencing

o Simultaneous control of all TRXs

o Maximize test throughput with full parallel test

o Get ultra-fast data processing with quad-core controller and high-bandwidth PXIe backplane

o Accelerate test execution with advanced sequencing and single acquisition, multiple measurements

Increase production yield with signal purity and measurement quality

o Best-in-class power-level accuracyo ≤ ±0.4 dB

o High-margin receiver EVM floor o < 1% EVM for 20 MHz LTE carrier

Wireless Symposium

Fastest, Most Accurate Parallel Femtocell Test

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29

Lowest Cost of Test - Reducing CAPEX Investment

Small form factor – PXI based instrument• Up to 4 independent TRX• Each is a fully calibrated VSA&VSG

Flexible License structure• Apps bundled with mainframe• Upgrade Freq. & BW (SW lic. only)• New radio format support (1 lic for all TRX)

Minimise cost of ownership• 3 year Std Keysight Warranty• Field upgradeable / replaceable TRX• Rugged N-Type RF connectors (for MFG)

4G_H15_EXF Femtocell MFG

Shared Embedded ControllerMeasurement App license

Signal Studio/waveform pack license

VSA

VSG

RFIO

VSA

RFIO

VSA

RFIO

VSA

RFIO

VSG VSG VSG

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Accelerate Time to Volume ManufacturingManufacturing Test Integration Program

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Quickly step your DUT through cal and test modes with chipset software manufacturing test tools

Control, Cal, & Test

Keysight Chipset Reference Software – ex. TAP• Save engineering time spent on test development • GUI and API for chipset control, calibration and verification• Tailor measurement parameters to your test plan• Generate graphical test results and logs

Collaboration with Wireless Chipset Suppliers

Wireless Chipsetsupplier

Production

Keysight Instrument

Keysight Chipset Reference Software

Chipset Suppliers’ tools

Chipset suppliers’ manufacturing test tools• Keysight instrument integrated into manufacturing test tools• Solutions verified by Keysight & Wireless Chipset suppliers• New chipset models being added to keep pace with latest

technology advances

Wireless Symposium

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E6650A - EXF Wireless Test Set for Femtocell

31

Fastest, most accurate parallel testo Speed optimized HW and SW applications

measurement scienceo Sequence analyzer, SAMM

Ultimate scalability and port density on the manufacturing line

o Up to 4 independently configurable TRXo Modularity: repair, upgrade, extensibilityo Small MFG. footprint

Broad multi-format Supporto Cellular + WLAN X-Series Apps (DL only)o One SW license for all TRX modules

Backward Compatible with Bench Topo Same X-Series Measurement scienceo Same signal studio waveformso Consistent results between R&D & Mfg

Wireless Symposium

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Thank You!

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Back up

Wireless Symposium 33

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What are the components that give us the overall test time?

Wireless Symposium 34

Typical femtocell test plan-- Flow chartCal freq

Ant# ≤N?

Switch Antenna

Tx power EVM

Freq Error

SEM

ACPR

DUT Tx RxBoot Cal

Ch# ≤M?

Switch channel

Boot

Y

Y

N

Reset Ant#

Ant# ≤N?

Switch Antenna

Ch# ≤M?

Switch channelCal power

Rx sensitivity

Boot

Y

N

Done

Y

N

Mode switch time

Mode switch time

TxMeasurement time

Rx Measurement time

Calibration time

Calibration time

N

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Page 35

Femtocells are low-power wireless access points that operate in licensed spectrum toconnect standard mobile devices to a mobile operator’s network using residential DSL or cablebroadband connections.

Source: http://www.femtoforum.org

What is a Femtocell?

35

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Page 36

Why Femtocells?Node B vs. Femtocell (HNB)

64QAM16QAMQPSK

distance

64QAM

16QAM

QPSK

36

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Page 37

Serving NetworkGSM/GPRS/EDGE Radio Access Network (GERAN) Core & Services NetworkCS Core (Voice)

SGSN

MGWMSC

VLR HLRSMS

PCRF

PDN

BTS

BSC

PCU

Femtocell  Indoor  Architecture

MS

Um Abis

Uu

Femtocell Management System

PS Core (Data)

GSM‐ACS

PSGPRS‐Gb

PS

CSIu‐CS

Iu‐PS

Iub

RNCHNB Secure GatewayHNB‐GW

IP VPN

Home Node B

UMTS Terrestrial Radio Access Network (UTRAN)

NodeB

RNC

UE

Uu Iub

RNC

Iur

Radio Network Subsystem

Base Station Subsystem

HSS

S6

S7

GGSN

SGW

SS7/SIGTRAN

Internet

RX+

CSCF MRF

ISPADSL

CS Iu‐CS PS Iu‐PS

FemtoCell (HNB) Architecture, Air Interface, IP network

37

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What is a Femtocell?(in the Smallcell categories)

– Femtocell is a low-power wireless access point that operate in licensed spectrum to connect standard mobile devices to a mobile operator’s network using residential DSL or cable broadband connections.

http://www.smallcellforum.org/aboutsmallcells-small-cells-what-is-a-small-cell

Macro

Micro

Indoor

Outdoor/ metro

Outdoor/ metro

IndoorHome

/ Personal

Enterprise

SizeWeight

cost

40 W

4 W

300 mW

50 mW

RAN ArchitectureIu-b

(RNC)Iu-h(Femto gateway)

RF

Pow

er

Femto

Operator ConsumerDeployment &

Background management

Small Cell Types and Characteristics (original source: NGMN)

Pico

38

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What is a Femtocell?(in the Smallcell categories)Specifications Microcells Picocells Public-Space

FemtocellsHome useFemtocells

Cell radius 2 km max 200 m max 10-100 mOutput Power 33-36 dBm / 2-5

W250 mW –1W

1 mW – 250 mW

Number of users More than 100 30 to 100 Less than 20Controller signaling protocol

Iu-b Iu-b Iu-b / Iu-h Iu-h

RRH/RRU option Yes Yes No NoDAS usage Yes Yes No No

Application Microcells Picocells Public-Space Femtocells

Home useFemtocells

Low power outdoor sites Yes Yes No NoVillages and road sites Yes Yes No NoCity centers Yes Yes No NoRooftop sites Yes Yes No NoStadiums Yes Yes No NoTunnel sites (e.g. subway) Yes Yes No NoShopping centers, malls Yes Yes Yes NoIn-building sites (e.g. building / office floor)

Yes Yes Yes No

Home sites (e.g. room) Yes Yes Yes YesWireless Symposium 39

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Ultimate Scalability

160 MHz80 MHz

40 MHz

380 MHz-6 GHz1.1-1.8 GHz

380 MHz-3.8 GHz2.3-2.6 GHz 4.8-6 GHz

• Tailor your TRX’s measurement bandwidth

• Tailor your TRX’s frequency rangeUpgrade your TRX

hardware capability

with license keys

Buy one software license, apply to the platform (1~4 TRX)• Measurement application• Waveform packs

40Wireless Symposium

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X-Series Benchtop Signal Analyzer Portfolio (excludes PXI)

41

EXABalance the challenges10 Hz to 44 GHz, 40 MHz BW

MXAAccelerate in wireless 10 Hz to 26.5 GHz, 160 MHz BWReal-time spectrum analysis

PXADrive your evolution3 Hz to 50 GHz, 160 MHz BWReal-time spectrum analysis

89600 VSA softwareSee through the complexity

CXAMaster the essentials9 kHz to 26.5 GHz, 25 MHz BW

UXASee the real performance3 Hz to 26.5 GHz, 510 MHz BWReal-time spectrum analysis

Per

form

ance

Price

X-Series Code Compatibility

Backward CC with legacy

Inherent X-Series CC

Wireless Symposium

Page 42: Techniques to Reduce Femtocell Manufacturing Test Timerfmw.em.keysight.com/mod/pdf/solutions_small_cell_test_ref_soln... · 2350 MHz 2350 MHz 2350 MHz 2310 MHz 2310 MHz 2610 MHz 2610MHz

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AGILENT SIGNAL GENERATION PORTFOLIO (EXCLUDES PXI) Keysight Signal Generation Portfolio (excludes PXI)

PXB Multi-Channel BB Fading & MIMO

MXGPure & Precise9 kHz to 6 GHz RF Vector & Analog9 kHz to 40 GHz uW Analog

N9310A Basic Bench top 9 kHz to 3 GHz

EXGCost Effective9 kHz to 6 GHz Vector & Analog9 kHz to 40 GHz uW Analog

PSGMetrology Grade 250 kHz to 44 GHz uW Vector250 kHz to 70 GHz uW Analog 250 kHz to 9 GHz RF Analog

UXGMetrology Grade 250 kHz to 40 GHz uW Analog

Signal Studio Software

OML and VDImm-wave source

modules up to 750 GHz

Per

form

ance

PriceWireless Symposium


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