Anritsu MS2717A User Manual

User’s Guide

MS2717A

Economy Spectrum Analyzer

Advanced Spectrum Analysis for Manufacturing, R & D
and General Purpose Testing

100 kHz to 7.1 GHz

WARRANTY

The Anritsu product(s) listed on the title page is (are) warranted against defects in
materials and workmanship for one year from the date of shipment.

Anritsu's obligation covers repairing or replacing products which prove to be defec­tive during the warranty period. Buyers shall prepay transportation charges for
equipment returned to Anritsu for wa rranty repairs. Obligation is limited to the origi­nal purchaser. Anritsu is not liable for consequential damages.

LIMITATION OF WARRANTY

The foregoing warranty does not apply to Anritsu conn ecto rs that h ave failed du e to
normal wear. Also, the warranty does not apply to defects resulting from improper
or inadequate maintenance by the Buyer, unauthorized modification or misuse, or
operation outside the environmental specifications of the product. No other war­ranty is expressed or implied, and the remedies provided herein are the Buyer's
sole and exclusive remedies.

TRADEMARK ACKNOWLEDGMENTS

Windows, Windows 2000 and Windows XP are registered trademarks of the
Microsoft Corporation. Intel Pentium is a trademark of Intel Corporation. VxWo rks is
a registered trademark, and WindML is a trademark of Wind River Systems, Inc. NI
is a trademark of National Instruments. Spectrum Analyzer is a trademark of Anritsu
Company.

NOTICE

Anritsu Company has prepared this manual for use by Anritsu Company personnel
and customers as a guide for the proper installation, operation and maintenance of
Anritsu Company equipment and computer programs. The drawings, specifications,
and information contained herein are the property of Anritsu Company, and any
unauthorized use or disclosure of these drawings, specifications, and information is
prohibited; they shall not be reproduced, copied, or used in whole or in part as the
basis for manufacture or sa le of the equipment or software programs with out the
prior written consent of Anritsu Company. All other trademarks contained herein are
the property of their respective owners.

UPDATES

Updates to this manual, if any, may be downloaded from the Anritsu internet site at:
http://www.us.anritsu.com.

VxWorks Runtime License

2000-1189 2000-1372

NI Device License

2000-1486

March 2007 10580-00159
Copyright 2007 Anritsu Company Revision B

WindML Ta rg et Lice nse

Equipment marked with the Crossed-out Wheelie Bin

symbol complies with the European Parliament and

Council Directive 2002/96/EC (the “WEEE Directive”) in

For Products placed on the EU market after August 13,
2005, please contact your local Anritsu representative at
the end of the product's useful life to arrange disposal in

accordance with your initial contract and the local law.

the European Union.

Safety Symbols Used on Equipment and in Manuals

The following safety symbols are used inside or on the equipment near operation loca­tions to provide information about safety items and operation precautions. Ensure
that you clearly understand the meanings of the symbols and take the necessary pre­cautions before operating the equipment. Some or all of the following five symbols
may or may not be used on all Anritsu equipment. In addition, there may be other
labels attached to products that are not shown in the diagrams in this manual.

This indicates a prohibited operation. The prohibited operation is indicated
symbolically in or near the barred circle.

This indicates a compulsory safety precaution. The required operation is
indicated symbolically in or near the circle.

This indicates a warning or caution. The contents are indicated symbolically
in or near the triangle.

This indicates a note. The contents are described in the box.

These indicate that the marked part should be recycled.

For Safety

Warning: Always refer to the operation manual when

working near locations at which the alert mark,
shown on the left, is attached. If the operation,
etc., is performed without heeding the advice in
the operation manual, there is a risk of personal
injury. In addition, the equipment performance
may be reduced. Moreover, this alert mark is
sometimes used with other marks and
descriptions indicating other dangers.

Warning: When supplying power to this equipment,

connect the accessory 3-pin power cord to a 3­pin grounded power outlet. If a grounded 3-pin
outlet is not available, use a conversion adapter
and ground the green wire, or connect the
frame ground on the rear panel of the
equipment to ground. If power is supplied
without grounding the equipment, there is a risk
of receiving a severe or fatal electric shock.

Warning: This equipment can not be repaired by the

operator. D
equipment covers or to disassemble internal
components. Only qualified service technicians
with a knowledge of electrical fire and shock
hazards should service this equipment. There
are high-voltage parts in this equipment
presenting a risk of severe injury or fatal electric
shock to untrained personnel. In additi on, there
is a risk of damage to precision components.

o not attempt to remove the

Table of Contents

Chapter 1 - General Information

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Calibration Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

ESD Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Replacing the Line Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Rack Mount Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Anritsu Service Centers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Chapter 2 - Quick Start Guide

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Turning the MS2717A On for the First Time. . . . . . . . . . . . . . . . . . 2-1

Front Panel Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Display Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Back Panel Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Making Spectrum Analyzer Measurements . . . . . . . . . . . . . . . . . . . 2-9

Chapter 3 - Key Functions

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

BW (Bandwidth). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Freq (Frequency). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Marker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Measure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Preset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19

Sweep . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24

Trace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27

i

Chapter 4 - Measurement Fundamentals

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Resolution Bandwidth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Video Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Sweep Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Attenuator Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Preamplifier Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

Chapter 5 - Transmitter Measurements

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Occupied Bandwidth Measurement . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Channel Power Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

CDMA Channel Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

CDMA Channel Power Measurement . . . . . . . . . . . . . . . . . . . . . . . 5-3

GSM Channel Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . 5-3

AMPS Channel Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . 5-4

Adjacent Channel Power Ratio. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5

Adjacent Channel Power Measurement . . . . . . . . . . . . . . . . . . . . . . 5-5

GSM Adjacent Channel Power Measurement . . . . . . . . . . . . . . . . . 5-6

AMPS (TDMA) Adjacent Channel Power Measurement . . . . . . . . 5-7

Out-of-Band Spurious Emission Measurement . . . . . . . . . . . . . . . . 5-8

In-band/Out-of-Channel Measurements . . . . . . . . . . . . . . . . . . . . . . 5-9

In-band Spurious Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9

Field Strength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11

AM/FM/SSB Demodulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

Carrier to Interference Ratio Measurement . . . . . . . . . . . . . . . . . . 5-12

Chapter 6 - WCDMA/HSDPA Measurements

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

WCDMA/HSDPA Signal Analyzer Mode . . . . . . . . . . . . . . . . . . . . 6-1

Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Freq (Frequency). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9

Preset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10

System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12

WCDMA/HSDPA Measurements . . . . . . . . . . . . . . . . . . . . . . . . . 6-15

Measurement Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17

WCDMA/HSDPA RF Measurements . . . . . . . . . . . . . . . . . . . . . . 6-21

Demodulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28

Pass/Fail Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-34

ii

Chapter 7 - Master Software Tools

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Using Master Software Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4

Language Editor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-11

Signal Standards Editor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-13

Pass/Fail Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-15

Dat Conversion Utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-17

Automatic Firmware Updates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-18

Appendix A - Signal Standards

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Appendix B - Error Messages

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Self Test or Application Self Test Errors . . . . . . . . . . . . . . . . . . . . . 6-1

Operation Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

Index

iii

iv

Chapter 1 General Information

Introduction

This chapter provides a description, performance specifications, optional accessories, pre­ventive maintenance, and calibration requirements for the Anritsu Economy Spectrum Ana­lyzer model listed below. Throughout this manual, this instrument may be referred to as a
Spectrum Analyzer.

Model Frequency Range

MS2717A 100 kHz to 7.1 GHz

Description

The Anritsu Economy Spectrum Analyzer is a synthesizer-based economy spectrum ana­lyzer that provides quick and accurate measurement results. Measurements can be easily
made using the main instrument functions: frequency, span, amplitude and bandwidth. Dedi­cated keys for common functions and a familiar calculator-type keypad are available for fast
data entry.

Time and date stamping of measurement data is automatic. The internal memory provides
for the storage and recall of more than 1000 measurement setups and more than 1000 traces.
The bright, high-resolution color liquid crystal display (LCD) provides easy viewing in a
variety of lighting conditions.

The Anritsu Economy Spectrum Analyzer is designed for monitoring, measuring, and ana­lyzing signal environments. A full range of marker capabilities such as peak, center and delta
functions are provided for faster, more comprehensive analysis of displayed signals. Upper
and lower multi-segmented limit lines are available to create quick, simple pass/fail mea­surements. A menu option provides for an audible alert when the limit value is exceeded.

Anritsu Master Software Tools, a PC-based software program, provides for storing measure­ment data. Master Software Tools can also convert the Spectrum Analyzer display into sev­eral graphic formats.

Measurements stored in internal memory can be downloaded to a PC using the included
USB or Ethernet cables. Once stored, the graphic trace can then be displayed, scaled, or
enhanced with markers and limit lines. Historical graphs can be overlaid with current data
using the PC mouse in a drag-and-drop fashion. The underlying data can be extracted and
used in spreadsheets or for other analytical tasks.

Options

The following options are available for the MS2717A Spectrum Analyzer:

Option Description

MS2717A-009 Modulation Measurement and Demodulation Hardware

Upgrade
MS2717A-044 WCDMA/HSDPA RF Measurements (requires Option 009)
MS2717A-045 WCDMA Demodulator (requires Option 009)

1-1

Accessories

The following standard accessories are supplied with the MS2717A:

Part Number Description

10580-00159 MS2717A User's Guide
2300-498 Master Software Tools Program CD ROM
2000-1360 USB A/5-pin mini-B Cable
2000-1371 Ethernet Cable, 7 feet (213 cm)
2000-1358 64 MB Compact Flash Memory Module
One year Warranty (includes firmware and software)

The following optional accessories are available for the MS2717A:

Part Number Description

2000-1358 64 MB Compact Flash Memory Module
42N50A-30 30 dB, 50W, Bi-dir., DC-18 GHz, N(m) to N(f) Attenuator
34NN50A Precision Adapter, DC to 18 GHz, 50W, N(m) to N(m)
34NFNF50 Precision Adapter, DC to 18 GHz, 50W, N(f) to N(f)
15NNF50-1.5B Test port cable armored, 1.5 meter, N(m) to N(f), 18.0 GHz
15NN50-1.5C Test port cable armored, 1.5 meter , N( m) to N(m), 6 GHz
15NN50-3.0C Test port cable armored, 3.0 meter , N( m) to N(m), 6 GHz
15NN50-5.0C Test port cable armored, 5.0 meter , N( m) to N(m), 6 GHz
15NNF50-1.5C Test port cable armored, 1.5 meter, N(m) to N(f), 6 GHz
15NNF50-3.0C Test port cable armored, 3.0 meter, N(m) to N(f), 6 GHz
15NNF50-5.0C Test port cable armored, 5.0 meter, N(m) to N(f), 6 GHz
15ND50-1.5C Test port cable armored, 1.5 meter , N(m) to 7/16 DIN(m), 6.0 GHz
15NDF50-1.5C Test port cable armored, 1.5 meter, N(m) to 7/16 DIN(f), 6.0 GHz
3-806-152 Ethernet Cable, Crossover
2300-498 Master Software Tools Program CD ROM
1091-27 Adapter, Type-N male to SMA female
510-90 Adapter, 7/16 DIN (f) to N(m), DC to 7.5 GHz, 50 ohm
510-91 Adapter, 7/16 DIN (f)-N(f), DC to 7.5 GHz, 50 ohm
510-92 Adapter, 7/16 DIN(m)–N(m), DC to 7.5 GHz, 50 ohm

1-2

510-93 Adapter, 7/16 DIN(m)-N(f), DC to 7.5 GHz, 50 ohm
510-96 Adapter 7/16 DIN (m) to 7/16 DIN(m), DC to 7.5 GHz, 50 ohm

Part Number Description

510-97 Adapter 7/16 DIN(f) to 7/16 DIN(f), 7.5 GHz, 50 ohm
760-240 MS2717A Transit Case
MS2717A-001 Rack Mount Kit (no slides)
10580-00159 Anritsu User’s Guide, Model MS2717A
10580-00160 Anritsu Programming Manual, Model MS2717A
10580-00161 Anritsu Maintenance Manual, Model MS2717A

For a complete list of accessories available for the MS2717A, refer to the MS2717A Spec­trum Analyzer Technical Datasheet, Anritsu part number 11410-00390, available online at

www.us.anritsu.com.

1-3

Performance Specifications

Frequency

Frequency Range: 100 kHz to 7.1 GHz
Tuning Resolution: 1 Hz
Frequency Reference: Aging: ±1 ppm/10 years

Accuracy: ±1 ppm (25°C ± 25°C) + aging (standard)

Accuracy: ±3 ppm (25°C ± 25°C) + aging (Option 9)
Frequency Span: 10 Hz to 7.1 GHz plus 0 Hz (zero span)
Sweep Time: Minimum 200 ms, 10 µs in zero span
Sweep Trigger: Free run, Single, Video, External
Resolution Bandwidth: (–3 dB width) 10 Hz to 3 MHz in 1-3 sequence ± 10%
Video Bandwidth: (–3 dB) 1 Hz to 3 MHz in 1-3 sequence
SSB Phase Noise: –100 dBc/Hz max at 10, 20 and 30 kHz offset from carrier

–102 dBc/Hz max at 100 kHz offset from carrier
Capture Bandwidth 8 MHz

Amplitude

Measurement Range: DANL to +30 dBm
Overall Amplitude

Accuracy (95%)
20–30ºC, 10 dB input
attenuation, preamplifier
off, 0 dBm to –50 dBm ±0.9 dB, 100 kHz to 3 GHz

±1.25 dB, >3 GHz to 7.1 GHz

Displayed Average Noise Level (DANL in 10 Hz RBW, 0 dB attenuation, preamp on)
Frequency Typical Max
>10 MHz to 1 GHz –155 –151
>1 GHz to 2.2 GHz –152 –149
>2.2 GHz to 2.8 GHz –147 –143
>2.8 GHz to 4.0 GHz –150 –149
>4.0 GHz to 6.5 GHz –150 –144
>6.5 GHz to 7.1 GHz –149 –144

Display Range: 1 to 15 dB/div in 1dB steps. Ten divisions displayed.

Amplitude Units, Log Scale Modes: dBm, dBV, dBmv, dBµV

Attenuator Range: 0 to 65 dB

1-4

WCDMA/HSDPA RF Measurements (Option 44, requires Option 9)

Frequency Range 824–894 MHz, 2300–2700 MHz

1710–2170 MHz

RF Channel Power ±0.7 dB typical ±0.7 dB typical
(15ºC to 30ºC) (±1.25 dB max) (±1.25 dB max)

Occupied Bandwidth ±100 kHz ±100 kHz

Residual ACLR

ACLR Accuracy ±0.8 dB ACLRŠ–45 dB ±1.0 dB ACLRŠ–45 dB
at 5 MHz offset at 5 MHz offset

Freqency Error ±10 Hz + Time Base Error ±10 Hz + Time Base Error

1

–54 dB typical –54 dB typical

at 5 MHz offset at 5 MHz offset

–59 dB typical –57 dB typical

at 10 MHz offset at 10 MHz offset

±0.8 dB for ACLRŠ–50 dB ±1.0 dB for ACLRŠ–50 dB

at 10 MHz offset at 10 MHz offset

99% confidence level 99% confidence level

WCDMA Demodulator (Option 45, requires Option 9)

Frequency Range 824–894 MHz, 2300–2700 MHz

1710–2170 MHz

EVM Accuracy

Residual EVM 2.5% typical 2.5% typical

1

(3GPP Test Model 4) ±2.5% for EVM £20%

±2.5%; EVM £25%

(3GPP Test Model 5)

±2.5%; EVM £20%

Code Domain Power ±0.5 dB for code ±0.5 dB for code

channel power Š25 dB channel power Š25 dB

16, 32, 64 DCPH 16, 32, 64 DCPH

(test model 1) (test model 1)

16, 32 DCPH 16, 32 DCPH

(test model 2, 3) (test model 2, 3)

CPICH (dBm) ±0.8 dB typical ±0.8 dB typical
Scrambling Code 3 seconds 3 seconds

1

Depends on reference level, input signal level and single channel conditions.

1-5

General

Max Continuous Input: 10 dB attenuation, +30 dBm, ±50 VDC
RF Input VSWR: 2.0:1 maximum, 1.5:1 typical (Š10 dB attenuation)

Interfaces Type N female RF Connector

BNC female connectors for ext reference and ext trigger

RJ45 connector for Ethernet 10/100-Base T

USB 2.0 (full-speed)

Compact Flash

2.5 mm 3-wire cellular headset connector

Environmental: MIL-PRF-28800F class 2

Operating: –10º C to 55º C, humidity 85%

Storage: –51º C to 71º C

Altitude: 4600 meters, operating and non-operating

AC Input Power 90V to 250 VAC, 50-60 Hz, 400 VA maximum

Electromagnetic Compatibility:

Meets European Community requirements for CE marking.

Size: 372 x 242 x 339 mm (14.7 x 9.6 x 13.4 in.)
Weight: 5.6 kg (< 12 lbs.) typical

For a complete list of MS2717A specifications, refer to the MS2717A Spectrum Analyzer
Technical Datasheet, Anritsu part number 11410-00390, available online at
www.us.anritsu.com.

1-6

Preventive Maintenance

MS2717A preventive maintenance consists of cleaning the unit and inspecting and cleaning
the RF connector on the instrument and all accessories. Clean the MS2717A with a soft, lint­free cloth dampened with water or water and a mild cleaning solution.

CAUTION

To avoid damaging the display or case, do not use solvents or abrasive cleaners.

Clean the RF connectors and center pins with a cotton swab dampened with denatured alco­hol. Visually inspect the connectors. The fingers of N(f) connectors and the pins of N(m)
connectors should be unbroken and uniform in appearance. If you are unsure whether the
connectors are good, gauge the connectors to confirm that their dimensions are correct.

Calibration Requirements

The MS2717A loads factory calibration data during start-up, eliminating the need for daily
calibration checks.

Although the MS2717A does not require daily calibration, Anritsu recommends annual cali­bration and performance verification by local Anritsu service centers. Anritsu service cen­ters are listed in this chapter.

ESD Cautions

The MS2717A, like other high performance instruments, is susceptible to ESD damage.
Very often, coaxial cables and antennas build up a static charge, which, if allowed to dis­charge by connecting directly to the MS2717A without discharging the static charge, may
damage the MS2717A input circuitry. MS2717A operators should be aware of the potential
for ESD damage and take all necessary precautions.

Operators should exercise practices outlined within industry standa rds such as JEDEC-625
(EIA-625), MIL-HDBK-263, and MIL-STD-1686, which pertain to ESD and ESDS devices,
equipment, and practices. As these apply to the MS2717A, it is recommended that any static
charges that may be present be dissipated before connecting coaxial cables or antennas to the
MS2717A. This may be as simple as temporarily attaching a short or load device to the cable
or antenna prior to attaching to the MS2717A. It is important to remember that the operator
may also carry a static charge that can cause damage. Following the practices outlined in the
above standards will ensure a safe environment for both personnel and equipment.

1-7

Replacing the Line Fuse

The MS2717A line fuse value is printed on the rear panel next to the power connector.

CAUTION

Before changing the fuse, always remove the power cord from the power outlet. There is
a risk of receiving a fatal electric shock if the fuse is replaced with the power cord con­nected. Always use a new fuse of the type and rating specified by the fuse markings on
the rear panel of the instrument.

To replace the line fuse:
Step 1. Turn off the rear panel power switch and disconnect the MS2717A from the

power source.

Step 2. Using a small flat-blade screwdriver, carefully pry under the tab above the rear

panel power switch to open the cover and gain access to the fuse holders (refer to
the figure below).

Figure 1-1. Replacing the Line Fuse

Step 3. Slide the fuse out of the fuse holder.
Step 4. If the fuse is defective, replace the fuse with a new fuse of the type and rating

specified by the fuse markings on the rear panel of the instrument.
Step 5. Reinstall the fuse holder in the rear panel power connector.
Step 6. Close the cover to secure the fuse holder in place. The cover will close with an

audible snap.
Step 7. Reconnect the MS2717A to the power source and turn on the rear panel po wer

switch.

1-8

Rack Mount Kit

The MS2717A Rack Mount Kit (part number MS2717A-001) allows the unit to be mounted
to a standard 19-inch equipment rack. Follow the instructions below to install the kit.

Step 1. Turn off the rear panel power switch and disconnect the MS2717A from the

power source.
Step 2. Using a small flat blade screwdriver, carefully pry the cover plates from the front

sides of the unit to expose the rack mount bracket mounting holes.

REMOVE

COVER PLATE

Figure 1-2. Rack Mount Bracket Mounting Holes

Step 3. Align the rack mount brackets (part number 65642) wit h the screw ho les and

insert the mounting screws (905-2620) as shown. Tighten using a #1 Phillips

screw driver.

Figure 1-3. Insert the Mounting Screws

Step 4. Repeat the process on the other side. The unit is ready to be mounted into an

instrument rack.

1-9

Anritsu Service Centers

UNITED STATES

ANRITSU COMPANY
490 Jarvis Drive
Morgan Hill, CA 95037-2809
Telephone: [phone]
1-800-ANRITSU
FAX: [phone]

ANRITSU COMPANY
10 New Maple Ave., Unit 305
Pine Brook, NJ 07058
Telephone: [phone]
1-800-ANRITSU
FAX: [phone]

ANRITSU COMPANY
1155 E. Collins Blvd
Richardson, TX 75081
Telephone: 1-800-ANRITSU
FAX: [phone]

AUSTRALIA

ANRITSU PTY. LTD.
Unit 21, 270 Ferntree Gully Road
Notting Hill, VIC 3168
Australia
Telephone: [phone]
FAX: [phone]

FRANCE

ANRITSU S.A
9 Avenue du Quebec
Zone de Courtaboeuf
91951 Les Ulis Cedex
Telephone: [phone]
FAX: [phone]

GERMANY

ANRITSU GmbH
Konrad-Zuse-Platz 1
81829 Muenchen, Germany
Telephone: [phone]
FAX: [phone]

INDIA

MEERA AGENCIES PVT. LTD.
23 Community Centre
Zamroodpur, Kailash Colony
Extension,
New Delhi, India 110 048
Phone: [phone]
FAX : [phone]

ISRAEL

TECH-CENT, LTD.
4 Raul Valenberg St
Tel-Aviv 69719
Telephone: [phone]
FAX: [phone]

SINGAPORE

ANRITSU (SINGAPORE) PTE
LTD.
10, Hoe Chiang Road
#07-01/02 Keppel Towers
Singapore 089315
Telephone: [phone]
FAX: [phone]

SOUTH AFRICA

ETECSA
12 Surrey Square Office Park
330 Surrey Avenue
Ferndale, Randburg, 2194
South Africa
Telephone: [phone]
FAX: [phone]

SWEDEN

ANRITSU AB
Borgafjordsgatan 13
164 40 Kista
Telephone: [phone]
FAX: [phone]

TAIWAN

ANRITSU CO., INC.
7F, No. 316, Section 1
NeiHu Road
Taipei, Taiwan, R.O.C.
Telephone: [phone]
FAX: [phone]

BRAZIL

ANRITSU ELECTRONICA LTDA.
Praia de Botafogo, 440, Sala
2401
CEP22250-040, Rio de Janeiro,
RJ, Brasil
Telephone: [phone]
FAX: [phone]

CANADA

ANRITSU INSTRUMENTS LTD.
700 Silver Seven Road, Suite 120
Kanata, Ontario K2V 1C3
Telephone: [phone]
FAX: [phone]

CHINA

ANRITSU ELECTRONICS
(SHANGHAI) CO. LTD.
2F, Rm B, 52 Section Factory
Building
No. 516 Fu Te Rd (N)
Shanghai 200131 P.R. China
Telephone:[phone],
58680227, 58680228
FAX: [phone]

1-10

ITALY

ANRITSU Sp.A
Roma Office
Via E. Vittorini, 129
00144 Roma EUR
Telephone: [phone]
FAX: [phone]

JAPAN

ANRITSU CUSTOMER SER­VICES LTD.
5-1-1 Onna Atsugi-shi
Kanagawa-Prf. 243-0032 Japan
Telephone: [phone]
FAX: [phone]

KOREA

ANRITSU CORPORATION LTD.
Service Center:
8F Hyunjuk Building
832-41, Yeoksam Dong
Kangnam-Ku
Seoul, South Korea 135-080
Telephone: [phone]
FAX: [phone]

UNITED KINGDOM

ANRITSU LTD.
200 Capability Green
Luton, Bedfordshire
LU1 3LU, England
Telephone: [phone]
FAX: [phone]

Chapter 2

A

Quick Start Guide

Introduction

This chapter provides a brief overview of the Anritsu MS2717A Spectrum Analyzer. The
intent of this chapter is to provide a starting point for making basic measurements. For more
detailed information, see Chapter 3, Key Functions and Chapter 4, Measurement Fundamen-
tals.

Turning the MS2717A On for the First Time

No initial setup is required. After unpacking, the MS2717A is ready for use. The MS2717A
is equipped with automatic line-power sensing and will operate with line voltages from 90V
to 250 VAC, at 50-60 Hz, 400 V A maximum. The MS2717A is intended for Installation Cat­egory (Over Voltage Category) II.

Step 1. Connect the AC line cord to the AC Input on the rear panel of the instrument and

to an adequate mains supply.

CAUTION

When supplying power to this equipment, connect the accessory 3-pin
power cord to a 3-pin grounded power outlet. If a grounded 3-pin outlet is
not available, use a conversion adapter and ground the green wire. If
power is supplied without grounding the equipment, there is a risk of
receiving a severe or fatal electric shock.

Step 2. Switch the AC Power rocker switch on the rear panel to “1” to apply the line volt-

age to the power supply.

AC POWER

ON/OFF

C LINE INPUT

Figure 2-1. MS2717A AC Input

2-1

Step 3. Set the instrument to Operate by pressing the illuminated Standby/Operate (On/

S

Off) front panel button.

TANDBY/OPERATE BUTTON

Figure 2-2. MS2717A On/Off Button

The MS2717A takes about forty-five seconds to complete power up and load the application
software. At the completion of this process, the instrument is ready to use.

For information on making measurements with the Spectrum Analyzer, refer to “Making a
Spectrum Analyzer Measurement,” later in this chapter. For advanced applications, refer to
Chapter 4, Measurement Fundamentals, and Chapter 5, Transmitter Measurements.

2-2

Front Panel Overview

S

SO

S

The menu-driven interface is easy to use and requires little training. Hard keys on the front
panel are used to initiate function-specific menus. There are five function hard keys located
below the display. In Spectrum Analyzer mode, the function hard keys are:
quency),
mode, the function hard keys are:

Marker.

There are 21 hard keys and a rotary knob located to the right of the display. Eight of the hard
keys are dual purpose, depending on the current mode of operation. The dual-purpose keys
are labeled with a number on the key itself, and the alternate function printed on the panel
above the key. Use the shift key to access the functions printed on the panel. The
key, used for aborting data entry, is the round button located above the soft keys. The rotary
knob and the keypad can both be used to change the value of an active parameter.

There are also eight soft keys to the right of the display which change function depending
upon the current menu selection. The current soft key function is indicated in the active
function block to the right of the display. The locations of the different keys are shown in
Figure 2-2, below.

Amplitude, Span, BW (Bandwidth) and Marker. In WCDMA Signal Analyzer

Freq (Frequency), Amplitude, Setup, Measurements and

FT KEY

Freq (Fre-

Escape

ACTIVE FUNCTION

BLOCK

ESCAPE KEY

SHIFT KEY
ROTARY KNOB

KEYPAD

FUNCTION

HARD KEY

Figure 2-3. MS2717A Overview

Ventilation Ports

It is important to keep the ventilation ports on the top and sides of the intrument clear of
obstructions at all times for proper ventilation and cooling of the instrument.

RF IN

2-3

Display Overview

Figure 2-3 illustrates some of the key information areas of the MS2717A display. Refer to
Chapter 3, Key Functions, for more detailed key descriptions.

Real Time

Instrument

Settings

Summary

Clock

Display Area

Soft Key

Labels

Hard Key Labels

Figure 2-4. Display Overview

2-4

Optional Data Window

Back Panel Connectors

SLO

N

JAC

A

The connectors and indicators located on the back panel are shown in Figure 2-4 and
described below.

EXTERNAL TRIGGER

AC POWER

ON/OFF

C LINE INPUT

COMPACT

Figure 2-5. Back Panel Connectors

When supplying power to this equipment, connect the accessory 3-pin
power cord to a 3-pin grounded power outlet. If a grounded 3-pin outlet is
not available, use a conversion adapter and ground the green wire. If
power is supplied without grounding the equipment, there is a risk of
receiving a severe or fatal electric shock. The MS2717A is equipped with
automatic line-power sensing and will operate with line voltages from 90V
to 250 VAC, at 50-60 Hz, 400 VA maximum.

FLASH

IN

CELLULAR

HEADSET

T

CAUTION

EXTERNAL
REFERENCE
FREQUENCY

RJ45 LAN
CONNECTIO

USB PORT

K

LAN Connection

The RJ-45 connector is used to connect the MS2717A to a local area network. Integrated
into this connector are two LEDs. The amber LED indicates the presence of LAN voltages—
a live LAN connection—while the green LED flashes to show that LAN traffic is present.
The instrument IP address is set by pressing the
by the

System Options soft key and the Ethernet Config soft key. The instrument Ethernet

Shift key, then the System (8) key followed

address can be set automatically using DHCP, or manually by entering the desired IP
address, gateway address and subnet mask.

Dynamic Host Configuration Protocol (DHCP) is an Internet protocol that automates the
process of setting IP addresses for devices that use TCP/IP, and is the most common method
of configuring a device for network use. To determine if a network is set up for DHCP, con­nect the MS2717A to the network and select DHCP protocol in the

Ethernet Config menu.

2-5

Turn the MS2717A off, and then on. If the network is set up for DHCP, the assigned IP
address should be displayed briefly after the power up sequence.

To display the IP address with the instrument on, press the
then the
displayed as shown in Figure 2-5.

Figure 2-6. IP Address Assigned Using DHCP

System Options soft key and the Ethernet Config soft key. The IP address will be

Shift key, then the System key,

More about DHCP

DHCP stands for Dynamic Host Configuration Protocol. It is a protocol that allows a server
to dynamically assign IP addresses to devices that are connected to the network. Most net­works include a DHCP server to manage IP addresses. When a DHCP server is available on
the network, DHCP is the preferred IP address mode.

When using DHCP, no setup is required to lease and use a dynamic IP address. In a dynamic
IP operation, the IP address in use may change from use to use. The DHCP server hands out
IP addresses on a first come, first served basis. As soon as the device is disconnected from
the network, the IP address that it was using becomes available to lease to the next unit
requesting an IP address. Normally there is some amount of lag time on the DHCP server
end, so if the device is connected again reasonably soon, it may end up with the same
address.

NOTE: The MS2717A must be connected to the network before it is turned
on for DHCP to work. Key elements of the DHCP lease are only performed
during the instrument's startup operations, or when switching from manual
to DHCP.

When a DHCP server is not available, a Static IP address can be used. A Static IP address is
a fixed address. Once set, it will always remain the same and care must be taken to not con­flict with other equipment on the network.

When using a static IP address on an established network, always request a Static IP address
from the network administrator. Randomly choosing a Static IP address on an established
network may result in duplicate IP addresses or other conflicts.

Three parameters must be set prior to using a Static IP address:

2-6

IP Address

This is the Static IP address on the network.

Default Gateway

Often when a static IP address is assigned, a default gateway is also identified. If the
default gateway is unknown, type in the Static IP address so that the Static IP address and
Default Gateway are the same number.

Subnet Mask

This parameter is usually extracted from the Static IP address based on the class of the
address and determines the destination of any broadcast messages that might be sent from
the instrument. It can be customized if necessary. The subnet mask may also be provided
with the Static IP address.

Example 1

In this example, a Static IP address has been chosen because there is no network available.
The instrument is connected to the network port on the PC with a crossover Ethernet cable
(not included). This is also referred to as Direct Connect:

IP Address: 10.0.0.2
Default Gateway: 10.0.0.2
Subnet Mask: 255.255.0.0

Example 2

In this example, the Static IP address has been assigned with an associated gateway and sub­net mask:

IP Address: 153.56.100.42
Default Gateway: 153.56.100.1
Subnet Mask: 255.255.252.0

There are a few tools built into the Microsoft Windows operating system that can assist in
making some determinations about the network the PC is plugged into. Typing
command prompt will display information about the in-use parameters of the PC and its net­work connection. Below is an example of the typical results expected.

NOTE: The ipconfig display does not report if the information is from a
DHCP server or a Static IP setup.

Y:\>ipconfig
Windows 2000 IP Configuration
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix. : us.anritsu.com

IP Address. . . . . . . . . . . . : 172.26.202.172

Subnet Mask . . . . . . . . . . . : 255.255.252.0

Default Gateway . . . . . . . . . : 172.26.200.1

Another tool that can find out if a selected IP address is already on the network is
is a harmless way to determine if an address is found on the network, and if it is found, for it
to reply. Greatly simplified, ping sends out a request to a specific address to determine if it is
there. If it is found, it will respond by sending back what was sent to it. If it is not found, the
response will be "

Y:\>ping 172.26.202.172
Pinging 172.26.202.172 with 32 bytes of data:
Reply from 172.26.202.172: bytes=32 time<10ms TTL=128
Reply from 172.26.202.172: bytes=32 time<10ms TTL=128
Reply from 172.26.202.172: bytes=32 time<10ms TTL=128
Reply from 172.26.202.172: bytes=32 time<10ms TTL=128

request timed out" meaning that there was no reply from that IP address.

ipconfig at a

ping. Ping

2-7

Ping statistics for 172.26.202.172:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

USB Interface

The USB 2.0 interface can be used to connect the MS2717A directly to a PC. The first time
the MS2717A is connected to a PC, the normal USB device detection by the computer oper­ating system will take place. The CD-ROM shipped with the instrument contains a driver for
Windows 2000 and Windows XP that is installed when Master Software Tools is installed.
Drivers are not available for earlier versions of the Windows operating system. During the
driver installation process, place the CD-ROM in the computer drive and specify that the
installation wizard should search the CD-ROM for the driver.

Cellular Headset Jack

The cellular headset jack provides audio output from the built-in AM/FM/SSB demodulator
and other audio signals for testing and troubleshooting wireless communication systems.
The jack accepts a 2.5 mm 3-wire miniature phone plug such as those commonly used with
cellular telephones.

Ext Trigger

A TTL signal applied to the
sweep to occur. This mode is used in zero span, and triggering occurs on the rising edge of
the signal. After the sweep is complete, the resultant trace is displayed until the next trigger
signal arrives.

External Trigger female BNC input connector causes a single

Ext Freq Ref

BNC female connector for connection of an external frequency reference or external trigger.
Select the
nal reference from the list presented. Valid frequencies are 1 MHz, 1.2288 MHz, 1.544
MHz, 2.4576 MHz, 4.8 MHz, 4.9152 MHz, 5 MHz, 9.8304 MHz, 10 MHz, 13 MHz and

19.6608 MHz at amplitude from -10 dBm to +10 dBm.

RF In

50W Type-N female connector.

Compact Flash

The MS2717A is shipped with a 64 MB Compact Flash Memory Module, Anritsu Part
Number 2000-1358. The removable compact flash card can be any size, although it must be
a minimum of 64 MB to be able to hold the entire contents of the internal flash memory.

Ext Ref Freq soft key under the System menu to select the frequency of the exter-

2-8

Making Spectrum Analyzer Measurements

Required Equipment

• MS2717A Economy Spectrum Analyzer

• Optionally, an appropriate RF signal generator

Making a Measurement

To make a measurement, locate and display the signal(s) of interest by selecting the desired
frequency, span, and amplitude value, as explained below.

NOTE: In most cases, information and parameters can be entered into the
MS2717A through the keypad, the directional arrows or the rotary knob.
The numerical keypad enters the information directly. The up and down
arrow keys change a frequency parameter by the value entered through
the

Freq Step soft key (default value is 1 MHz). The left and right arrow

keys change the frequency parameter by one graticule, that is, one-tenth
of the total span. The rotary knob changes the frequency parameter by
one pixel per step. There are 551 pixels across the screen in normal mode
and 661 pixels in full-screen mode. Choose whichever method is most
convenient to enter the required information.

Step 1. Connect the input signal or antenna to the
Step 2. Press the

Freq key to display the Frequency menu.

Step 3. To enter a center frequency, select the

RF In test port.

Center Freq soft key and enter the desired

center frequency.
Step 4. To set a specific frequency band, select the

desired start frequency, then select the

Start Freq soft key and enter the

Stop Freq soft key and enter the desired

stop frequency.
Step 5. Press the

select the

Span key to display the Span menu and enter the span, or for a full span,

Full Span soft key. Selecting a full span will override any previously set

Start and Stop frequencies. For a single frequency measurement, select the

Span

soft key.

NOTE: To quickly move the span value up or down, select the

5

or Span Down 1-2-5 soft keys. These keys facilitate a zoom-in, zoom-out

Span Up 1-2-

in a 1-2-5 sequence.

Setting the Amplitude

Step 1. Press the

NOTE: To change the current measurement units, press the

Amplitude key.

Units soft key

and select the required units from the soft keys presented. Press the
soft key to return to the Amplitude menu.

Step 2. Press the

to set the reference level. Press
Step 3. Press the

the desired scale. Press

Reference Level soft key and use the Up/Down arrow keys or the keypad

Enter to set the reference level.

Scale soft key and use the Up/Down arrow keys or the keypad to enter

Enter to set the scale.

Zero

Back

NOTE: The

Scale parameter cannot be changed when linear units are

selected (Watts or Volts).
Press the

Amplitude soft key and select Auto Atten coupling of the attenuator

setting and the reference level to help ensure that harmonics and spurs
are not introduced into the measurements. See Attenuator Functions
(page 4-2) for more information.

2-9

Selecting a Signal Standard

Selecting a signal standard sets the center frequency, channel spacing, integration band­width and span for the first channel of the selected standard. Appendix A contains a table of
the signal standards available in the instrument.

To select a signal standard:
Step 1. Press the

Step 2. Press the

knob to highlight the desired signal standard. Press

Freq key to display the Frequency menu.

Signal Standard soft key and use the Up/Down arrow keys or the rotary

Enter to select the highlighted

signal standard.
Step 3. Press the

Channel# soft key to choose the required channel. By default, if a chan-

nel number has not yet been entered, the lowest channel number for that standard

is automatically selected. The channel numbers that can be selected correspond to

the channel numbering schemes of the various signal standards.

Setting Bandwidth Parameters

Both resolution bandwidth (RBW) and video bandwidth (VBW) can be automatically or
manually coupled to the frequency span. That is, the wider the span, the wider the RBW. The
ratio of the span width to the resolution bandwidth is 300:1 by default, and if necessary, can
be changed as follows:

Step 1. Press the
Step 2. Select the

BW key .

Span/RBW soft key. The current Span/RBW ratio is shown as part of

the soft key label. Change the value using the keypad, the directional arrows or the

rotary knob.
When auto coupling between the span and the RBW is selected, it is indicated on the left
side of the display as

RBW XXX, where XXX is the bandwidth value. If manual RBW cou-

pling is selected, a "#" is shown in front of RBW on the left side of the display, and the reso­lution bandwidth can be adjusted independently of the span. If a non-existent resolution
bandwidth is entered, the instrument will select the next higher resolution bandwidth. If a
value greater than the widest RBW is entered, the widest RBW will be selected.

Auto coupling of the VBW links the video bandwidth to the resolution bandwidth, so that
the wider the RBW, the wider the VBW. Auto coupling is indicated on the left side of the
display as

VBW XXX. If manual VBW coupling is selected, a "#" is shown in front of VBW

on the left side of the display, and the video bandwidth can be adjusted independently of the
RBW . If a non-existent video bandwidth is entered, the instrument will select the next higher
video bandwidth. If a value greater than the widest VBW is entered, the widest VBW will be
selected.

The ratio of the resolution bandwidth to the video bandwidth can be changed by pressing the

BW key, the RBW/VBW soft key, and then using the keypad, the directional arrows or the

rotary knob to set the ratio. The current value of the ratio is shown as part of the soft key
label.

Setting Sweep Parameters

To set the sweep parameters, press the

Shift key and then the Sweep (3) key.

Single/Continuous

When this soft key is pressed the instrument toggles between single sweep and continuous
sweep. In single sweep mode, after the sweep the instrument waits in Hold mode until the

Manual Trigger soft key is pressed or another triggering mode is selected.

2-10

Trigger Type

To select a specific type of triggering, press the

Free Run

The default trigger type is "Free Run" in which the instrument begins another sweep as
soon as one is finished.

External

A TTL signal applied to the External Trigger BNC input connector causes a single
sweep to occur. This mode is used in zero span, and triggering occurs on the rising
edge of the signal. After the sweep is complete, the resultant trace is displayed until the
next trigger signal arrives.

Video

This mode is used in zero span to set the power level at which a sweep is initiated. The
power level can be set from -120 dBm to +20 dBm. Trigger is based on the measured
signal level. If no signal reaches or exceeds the trigger level, there will be no trace on
the screen.

Change Trigger Position

This soft key is used in conjunction with video triggering to set the horizontal position
on the display where a signal that meets the video triggering criterion will be placed.
The value can be from 0% to 100%. Zero percent places the triggering event at the left
edge of the screen while 100% places the triggering at the right edge of the screen.
When the trigger position is any value other than 0%, the portio/n of the trace before
the trigger event is displayed very quickly since the trace data is stored in memory. The
portion of the trace after the trigger point is painted on the screen at the normal rate as
the signal is swept.

Trigger Type soft key. Selections are:

2-11

2-12

Chapter 3 Key Functions

Introduction

This chapter describes the MS2717A keys and how to use them. The major key sections are
arranged in alphabetical order with soft key menus under those key selections listed in the
order they appear on the instrument, from top to bottom.

There are five function hard keys located below the display . In Spectrum Analyzer mode, the
function hard keys are:
In WCDMA Signal Analyzer mode, the function hard keys are:

tude

, Setup, Measurements and Marker. There are 21 hard keys and a rotary knob located
to the right of the display. Eight of the hard keys are dual purpose, depending on the current
mode of operation. The dual-purpose keys are labeled with a number on the key itself, and
the alternate function printed on the panel above the key. Use the shift key to access the
functions printed on the panel. The
button located above soft keys. The rotary knob and the keypad can both be used to change
the value of an active parameter. There are also eight soft keys to the right of the display
which change function depending upon the current menu selection.

Amplitude

The Amplitude hard key is located below the display. The Amplitude menu soft keys are:

Freq (Frequency), Amplitude, Span, BW (Bandwidth) and Marker.

Freq (Frequency), Ampli-

Escape key, used for aborting data entry, is the round

Amplitude

Reference Level

10.0 dBm

Scale

10 dB/div

Auto Atten

OffOn

Atten Lvl

30.0 dB

RL Offset

0.0 dB

Units

-->

Pre Amp

On Off

Detection

-->

Figure 3-1. Amplitude Menu Soft Keys

Detection

Peak

RMS

Negative

Sample

Back

-->-->

Units

dBm

dBV

dBmV

dbuV

Volt

Watt

Back

Reference Level

3-1

The reference level is the top graticule line on the display, and can be set from +30 dBm to

-130 dBm. A value may be entered from the key pad, using the ± key as the minus sign.
After entering the value press the
change the reference level in 10 dB steps, and the Left/Right arrow keys change the value
by 1 dB. The rotary knob changes the value by 0.1 dB per detent.

The reference level value may be modified by the reference level offset value, discussed
later in this chapter.

Scale

The scale can be set in 1 dB steps from 1 dB per division to 15 dB per division. The value
can be changed using the keypad, the rotary knob or the Up/Down arrow keys.

Auto Atten On/Off

Input attenuation can be either tied to the reference level (On) or manually selected (Off).
When input attenuation is tied to the reference level, attenuation is increased as higher ref­erence levels are selected to make sure the instrument input circuits are not saturated by
large signals that are likely to be present when high reference levels are required.

Atten Lvl

Input attenuation can be set from 0 to 65 dB, in 5 dB steps. Select this soft key and use the
keypad, the rotary knob or the Up/Down arrow keys to change the attenuation value. When
the Preamplifier is turned on, the allowed attenuation settings are 0 and 10 dB.

RL Offset

Reference Level Offset compensates for the presence of input attenuation or gain external
to the instrument. Enter a positive value to compensate for an external amplifier or a nega­tive value to compensate for an external attenuator. Use the ± key to enter the negative sign
when a negative offset value is being entered.

dBm soft key or the Enter key. The Up/Down arrow keys

Units

Select the display units from the soft key menu shown on page 3-1. Press the
to return to the Amplitude menu.

Pre Amp On/Off

This soft key turns the low-noise front-end preamplifier on or off. The preamplifier lowers
the noise floor by approximately 25 dB. To assure accurate measurement results, the larg­est signal into the instrument input when the preamplifier is turned on should be <-50
dBm.

Back soft key

3-2

BW (Bandwidth)

The BW hard key is located below the display. The BW menu soft keys are:

BW

RBW

3 MHz

Auto RBW

OffOn

VBW

1 MHz

Auto VBW

OffOn

RBW/VBW

3

Span/RBW

300

Figure 3-2. BW Menu Soft Keys

RBW

The current resolution bandwidth value is displayed in this soft key. The RBW can be
changed using the keypad, the Up/Down arrow keys, or the rotary knob. The range is 10
Hz to 3 MHz in a 1-3 sequence, from 10 Hz to 30 Hz to 100 Hz, and so on.

Auto RBW

When Auto RBW is On, the instrument selects the resolution bandwidth based on the cur­rent span width. The ratio of span width to RBW can be specified using the Span/RBW
soft key .

VBW

The current video bandwidth value is displaye d in this soft key. The VBW can be changed
using the keypad, the Up/Down arrow keys, or the rotary knob. The range is 1 Hz to 3
MHz in a 1-3 sequence.

Auto VBW

When Auto VBW is On, the instrument selects the video bandwidth based on the resolu­tion bandwidth. The ratio of video bandwidth to resolution bandwidth can be set using the

RBW/VBW soft key.

RBW/VBW

This soft key displays the ratio between resolution bandwidth and video bandwidth. To
change the ratio, select this soft key and use the keypad, the Up/Down arrow keys, or the
rotary knob to select a new ratio. The default ratio is 3.

Span/RBW

This soft key displays the ratio between the span width and the resolution bandwidth. The
default value is 300, meaning that the span width is approximately 300 times the resolution
bandwidth. The value is approximate because resolution bandwidth filters come in discrete
steps while span width can be set to any value up to 7.1 GHz. To change the ratio, select
this soft key and use the keypad, the Up/Down arrow keys, or the rotary knob to select a
new ratio.

3-3

File

To access the functions under the File menu, select the Shift key, then the File (7) key. The
File menu soft keys are:

File

Save, Recall,

Delete, & Copy

Print

Save

On

Event

-->

-->

-->

Save On

… Crossing Limit

On Off

… Sweep Complete

On Off

Save Then Stop

On Off

Clear All

Print

Save

Screen

as JPEG

Back

-->

Save/Recall

Save

Setup

Recall
Setup

Save

Measurement

Recall

Measurement

Delete

Copy All

to

External Card

Copy All

from

External Card

Save

Screen

as JPEG

Figure 3-3. File Menu Soft Keys

Save / Recall

Selecting this soft key opens a list of save and recall function soft keys, as explained
below.

Save Setup

Opens a dialog box to name and save the current operating settings, allowing them to
be recalled later to return the instrument to the state it was in at the time the setup was
saved. The saved setup can be named using the keypad to select numbers, the rotary
knob to highlight a number or character and pressing the knob to select, or by selecting
the soft key for each letter. Us e the
Right directional arrows to move the cursor position. Press

Recall Setup

This soft key brings up a selection box that allows selection and recall of a previously
stored instrument setup. Use the rotary knob or the Up/Down arrow keys to highlight
the saved setup, and press

3-4

Back

-->

Shift key to select an upper case letter. Use the Left/

Enter to save the setup.

Enter, the rotary knob, or the Recall soft key to select. All

current instrument settings are replaced by the stored setup information. Press the Esc
key to cancel the recall.

Save Measurement

Initiates a dialog box to name and save the current active trace A. The saved measure­ment trace can be named using the keypad to select numbers, the rotary knob to high­light a number or character and pressing the knob to select, or by selecting the soft key
for each letter. Use the
tional arrows to move the cursor position. Press

Shift key to select an upper case letter . Use the Left/Right direc-

Enter to save the measurement trace.

NOTE: If a measurement has been previously saved, the Save Measure­ment dialog box will open with the previously saved name displayed with
an automatically incremented suffix. For instance, if the previously saved
trace was named Trace, the next measurement saved will be named T race
(1), and so on. To save the new measurement with this name, simply press

Enter. To save the new measurement with a similar name, press the Right

directional arrow and add the changes. To create a completly new name,
use the keypad, the rotary knob or select the soft key for each letter.

Recall Measurement

Brings up a selection box that allows recall of a previously stored measurement trace.
Use the rotary knob or the Up/Down arrow keys to highlight the saved measurement
trace, and press

Enter, the rotary knob, or the Recall soft key to select. A recalled trace

may be displayed as trace A, in place of the live trace, or as trace B or C along with the
live trace. Use the rotary knob or the Up/Down arrow keys to highlight the recalled
trace option, and press the

Enter key to select. Press the Esc key to cancel the recall.

To remove a recalled measurement trace from the screen, select the

Trace (5) key to open the Trace menu. Use the Trace soft key to select the trace to be

removed from the screen and use the
Use the

Trace key to select an active trace after blanking a recalled trace.

View/Blank soft key to view or blank the trace.

Shift key and the

Delete

Brings up a selection box that shows all stored setups and traces. The list shows the
setup or trace name, the type (stp for a saved setup, spa for a saved trace, jpg for a
JPEG file) and the date and time the information was saved. Use the rotary knob or the
Up/Down arrow keys to highlight the saved information, and press
knob, or the
information. Press the

Delete soft key to delete. Press the Delete All soft key to delete all saved

Esc key to cancel the operation.

Enter, the rotary

Copy All to External Card

This function copies all stored setups and measurements from the internal memory to
an external Compact Flash memory card.

Copy All from External Card

This function copies all measurements and setups from an external Compact Flash
memory card into the instrument internal memory.

Save Screen as JPEG

This function saves a measurement trace as a graphics file. The saved measurement can
be named using the keypad to select numbers, the rotary knob to highlight a number or
character and pressing the knob to select, or by selecting the soft key for each letter.
Use the
move the cursor position. Press

Shift key to select an upper case letter . Use the Left/Right directional arrows to

Enter to save the measurement after entering the file

name. The file is saved in the internal memory with the specified name, with .jpg
appended.

3-5

Print

The Print key can be used to save a measurement trace as a graphics file. This file can then
be downloaded to a PC using Master Software Tools and printed.

Save Screen as JPEG

This function saves a measurement trace as a graphics file. The saved measurement can
be named using the keypad to select numbers, the rotary knob to highlight a number or
character and pressing the knob to select, or by selecting the soft key for each letter.
Use the
move the cursor position. Press

Shift key to select an upper case letter . Use the Left/Right directional arrows to

Enter to save the measurement after entering the file

name. The file is saved in the internal memory with the specified name, with .jpg
appended.

Back

The

Back key returns to the previous menu.

Save On Event…

The instrument can be configured to automatically save a measurement if a selected
condition is satisfied. Approximately 1500 measurements can be saved before the
memory is full.

… Crossing Limit On/Off

When

Crossing Limit is On, and an upper or lower limit line is set, if any point in a

measurement exceeds either the upper or lower limit line, the measurement is automat­ically saved at the end of the sweep. The saved measurement is named "
by the date and time in the format:

LIMyyyymmddhhmmss. The time value in the file

LIM" followed

name will generally be slightly earlier than the measurement time stamp shown in th e
file list, since the file name is created at the time the limit violation is noted and the
time stamp is the time at which the measurement file is actually saved.

If a limit line has not been set, selecting this soft key results in the on-screen message:
"

You must have a limit ON first."

… Sweep Complete On/Off

When

Sweep Complete is On, the measurement is automatically saved at the end of a

sweep. This is particularly useful for very slow sweeps. The saved measurement is
named "

EOS" with a file name in the format: EOSyyyymmddhhmmss.

Save Then Stop On/Off

When the
surement when the

Save Then Stop soft key is set to On, the instrument will save just one mea-

Crossing Limit or Sweep Complete soft keys are set to On, and the

qualifying event occurs. Sweeping stops after a measurement is saved. If it is set to Off,
sweeping continues after a measurement is saved and more measurements may be
saved. The default for this selection is Off.

NOTE: This feature should be used with care. With

Save Then Stop set to

Off (the default) a large number of measurements can be saved when the

Crossing Limit or Sweep Complete soft keys are set to On, making it time-

consuming to retrieve saved measurements or to delete unwanted mea­surements. When there are many save d measureme nts , the time requ ired
to display a file list can be several minutes.

Clear All

Pressing this soft key turns off both save on event conditions and sets

Save then Stop to

Off, the default state.

3-6

Back

Returns to the top-level file menu.

Freq (Frequency)

The tuning frequency range for the MS2717A can be entered in several different ways
depending on what makes the most sense for the user or for the application. The center fre­quency and span can be specified, the start and stop frequencies can be entered, or a signal
standard and channel number can be selected from the built-in list. The
located below the display. The Freq menu soft keys are:

Freq

Center Freq

3.550 GHz
Start Freq

0 Hz

Stop Freq

7.100 GHz

Span

-->

Freq Step

1.000 MHz
Signal

Standard

Channel

- -

Freq hard key is

Figure 3-4. Freq Menu Soft Keys

Center Frequency

Press the

Freq key followed by the Center Freq soft key and enter the desired frequency

using the keypad, the arrow keys, or the rotary knob. If entering a frequency using the key­pad, the soft key labels change to
Selecting the

Enter key has the same affect as the MHz soft key.

NOTE: When using the up and down arrows, the frequency moves in
steps defined by the value entered using the
When using the left or right arrow keys, the frequency of the active param­eter moves by 10% of the current frequency span. If the instrument is in
zero span, the left and right arrows do nothing.
Turning the rotary knob changes the active frequency parameter in incre­ments of one display point for each click of the knob. There are 551 dis­play points across the screen (661 points in full-screen mode).

Start Frequency

Press the

Freq key followed by the Start Freq soft key and enter the desired frequency

using the keypad, the arrow keys, or the rotary knob. If a start frequency higher than the
current stop frequency is entered, the stop frequency will be changed to yield a 10 Hz span.

GHz, MHz, kHz and Hz. Select the appropriate units key.

Freq Step soft key.

3-7

Stop Frequency

Press the

Freq key followed by the Stop Freq soft key and enter the desired frequency

using the keypad, the arrow keys, or the rotary knob. If a stop frequency lower than the
current start frequency is entered, the start frequency will be changed to yield a 10 Hz
span.

Span

Press the

Freq key followed by the Span soft key and enter the desired span. The Span

menu is used to set the frequency range over which the instrument will sweep. For the
MS2717A, the span can be set from 10 Hz to 7.1 GHz. Span can also be set to zero span.

The soft key shows the current value for span in units of GHz, MHz, kHz or Hz. When the

Span button is pressed, span becomes the active parameter and may be changed. Use the

keypad, the directional arrow keys or the rotary knob to increase or decrease the span fre­quency. If the span is changed using the Up/Down arrow keys, the span changes by the
value of the Frequency Step for each key press.

Freq Step

Press the

Freq key followed by the Freq Step soft key to enter the desired frequency step

size. The frequency step specifies the amount by which a frequency will change when the
Up/Down arrow keys pressed. The center frequency, start frequency, and stop frequency
values are affected by the value of
frequency step when the Up/Down arrow keys are pressed. If

Freq Step. The active parameter will be changed by the

Freq Step is the active

parameter, nothing happens when the UP/Down arrow keys are pressed. The frequency
step size can be any value from 1 Hz to 7.1 GHz with a resolution of 1 Hz.

Use the keypad or the rotary knob to change the Frequency Step size.

Signal Standard

Use the Up/Down arrow keys or the rotary knob to highlight a signal standard and press

Enter to select.

When a signal standard is selected, the center frequency and span for the first channel of
the particular standard is automatically tuned. Other settings, such as channel spacing and
integration bandwidth, are also automatically entered. Appendix A contains a table of the
signal standards that are in the instrument firmware.

Channel #

Use the Up/Down arrow keys, the keypad, or the rotary knob to select a channel number
for the selected signal standard. The center of the channel is tuned to the center of the spec­trum analyzer display.

3-8

Limit

To access the functions under the Limit menu, select the Shift key, then the Limit (6) key.
The Limit menu soft keys are:

Limit

Limit

LowerUpper

On
Off

Limit Edit

-->

Limit Alarm
On Off

Set Default Limit

Figure 3-5. Limit Menu Soft Keys

Limit

Frequency

586.777 kHz

Amplitude

-15.0 dBm

Add

Point

Delete

Point

Next

Point

Left

Next
Point
Right

Move Limit

0.0 dBm

Back

-->

Two types of limit lines can be specified, lower limit lines and upper limit lines. Limit lines
can be used for visual reference only, or for pass/fail criteria using the limit alarm. Limit
alarm failures are reported whenever a signal is above the upper limit line or below the lower
limit line.

Each limit line can consist of a single segment, or as many as 40 segments across the entire
frequency span of the instrument. These limit segments are retained regardless of the current
frequency span of the instrument, allowing the configuring of specific limit envelopes at var­ious frequencies of interest without having to re-configure them each time the frequency is
changed. To clear the current limit setup configuration and return to a single limit segment
starting at the current start frequency and ending at the current stop frequency, press the

Default Limit

soft key.

Set

Limit Upper/Lower

This soft key selects which limit line will be active for editing. The limit line that is cur­rently selected for editing is underlined

.

On/Off

This soft key turns the active limit line (upper or lower) on or off.

Limit Edit

A submenu is displayed by this soft key that allows the creation or editing of single or
multi-segment limit lines. The currently active limit point is marked by a red circle on the
display.

3-9

Frequency

The frequency of each point in a limit line can be individually set. When a new point is
added, it takes on a value halfway between two existing points, or the stop frequency of
the current sweep if there is no point higher in frequency than the one being added. See
the

Add Point soft key description for more details. Use the keypad, the Left/Right

arrow keys or the rotary knob to change the frequency of a point.

Amplitude

The amplitude of each limit point can also be individually set. By default, when a new
point is added, it takes on the amplitude that is on the limit line at the frequency where
the point was added. Use the keypad, using the ± key as the minus sign, the Up/Down
arrow keys or the rotary knob to move the point to the desired value. The unit of the
amplitude limit is the same as the current vertical amplitude unit. See the
key description for more details.

Add Point

The behavior of this soft key depends on which limit point is active at the time the key
is pressed. If the active limit point is located somewhere in the middle of a multi-seg­ment limit line, a new limit point will be added that is halfway between the currently
active point and the point immediately to its right. The amplitude of the point will be
such that it falls on the limit line. For example, if there is a limit point at 2.0 GHz with
an amplitude of -30 dBm and the next point is 3.0 GHz with an amplitude of -50 dBm,
the added point will be at 2.5 GHz with an amplitude of -40 dBm. The frequency and
amplitude values of the new point can be adjusted as needed with the

Amplitude soft keys.

Add Point soft

Frequency and

If the last limit point is active (and not at the right edge of the display) the new limit
point will be placed at the right edge of the display at the same amplitude as the cur­rently active point.

Points may not be added beyond the current sweep limits of the instrument.

Delete Point

This soft key deletes the currently active point. The active point becomes the one
immediately to the left of the point that was deleted.

Next Point Left

This soft key selects the limit point immediately to the left of the active point, making
it active for editing or deletion. With each key press, the indicator of which point is
active moves one limit point to the left until it reaches the left edge of the screen.

Next Point Right

This soft key selects the limit point immediately to the right of the active point, making
it active for editing or deletion. With each key press, the indicator of which point is
active moves one limit point to the right until it reaches the right edge of the screen.

Move Limit

If the limit line is in its default state, the limit line will be set to the value entered. If the
limit line has been changed from its default settings, the entire single- or multi-segment
limit line can be moved up or down by the amount entered. V alues can be entered using
the keypad, the Up/Down arrow keys, or the rotary knob. The units for this amount will
be the current display units as selected under the

Amplitude menu.

3-10

Back

Returns to the higher-level Limit menu.

Limit Alarm

This soft key selects, for the currently active limit line, if an alarm beep will occur when a
data point exceeds the limit.

Set Default Limit

This soft key deletes all limit points for the currently active limit line and defaults to a sin­gle limit whose amplitude value will be selected to make it visible on the screen. The other
limit line is not altered.

Marker

Press the Marker function hard key to open the Marker menu. The MS2717A is equipped
with six markers. Any or all markers can be employed simultaneously. The
is located below the display. The Marker menu soft keys are:

Marker & Peak

Recall

Peak Search

Marker(1/2)

Marker

2 3 4 5 61

On
Off

Delta

On Off

Peak Search

-->

Measurement

Next Peak

Delete

Left

-->

Copy All

Next Peak

to

External Card

Right

Copy All

Delta Marker

from

to

External Card

Span

Save

Marker Freq

Screen

to

as JPEG

Center

Marker(2/2)

Marker Noise

On Off

Marker T able

On Off

All Markers

Off

Counter Marker

On Off

Marker hard key

Marker Freq

to

Center

Marker

to

Ref Lvl

More
Peak

Options

-->

More

-->

Figure 3-6. Marker Menu Soft Keys

Marker 1

2 3 4 5 6

Use this soft key to select the active marker. The underlined marker number is the active
marker. Each press of the soft key moves the underline to the next marker number.

On/Off

This soft key turns the active marker, selected by the

Marker

to

Ref Lvl

Peak Threshold

10.00%

Back

-->

Set Marker

To

Channel

Back

-->

Marker soft key above, on or off.

3-11

Delta On/Off

This function turns on a delta marker and prompts for a delta offset frequency, either posi­tive or negative from the frequency of the currently active marker.

Peak Search

This soft key places the currently active marker on the highest signal amplitude currently
displayed on screen.

Marker Freq to Center

This soft key changes the center frequency to place the currently active marker at the cen­ter of the display.

Marker to Ref Level

This soft key causes the amplitude of the currently active marker to become the reference
level, which is the top horizontal line of the display.

More Peak Options

This soft key brings up a secondary menu of soft keys for more peak searching options.

Peak Search

This soft key places the currently active marker on the highest amplitude signal cur­rently on screen.

Next Peak Left

From the current position of the active marker, the instrument searches to the left
(toward lower frequencies) for a peak signal that rises at least a certain amount above
the previous valley. If no such peak is found, the marker is placed at the left end of the
trace. The
searching.

Peak Threshold soft key allows the user to specify the performance of peak

Next Peak Right

From the current position of the active marker, the instrument searches to the right
(toward higher frequencies) for a peak signal that rises at least a certain above the pre­vious valley . If no such peak is found, the marker is placed at the right end of the trace.
The Peak Threshold soft key allows the user to specify the performance of peak search­ing.

Delta Marker to Span

Sets the total span width to the value of the delta marker . If the delta marker is zero, the
span is set to 10 Hz. If there is no delta marker, or the delta marker value is set to less
than 10 Hz, then the span will be set to 10 Hz.

Marker Freq to Center

Sets the center frequency to the frequency of the currently active marker.

Marker to Ref Lvl

Sets the amplitude of the currently active marker to the top graticule line as the refer­ence level.

Peak Threshold

This soft key allows the user to specify how far above the average noise floor a signal
must rise before it is considered a peak.

Back

Returns to the higher-level menu.

More

Opens a submenu of further Marker options.

3-12

Marker Noise

This marker option turns the markers into noise markers with units of dBm/Hz. When
this option is selected, the detection method is automatically changed to RMS and the
displayed value is compensated for the noise bandwidth of resolution bandwidth filter.

Marker Table

Pressing this soft key causes a table to be displayed below the sweep window. The
table is automatically sized to display all markers that are turned on. In addition to the
marker frequency and amplitude, the table also shows delta frequencies and amplitude
deltas for all markers that have deltas entered for them.

All Markers Off

This soft key turns off all markers and the marker table.

Counter Marker On Off

Sets the frequency counter mode for all markers. Marker frequency values are nor­mally limited in resolution to individual display pixels. Each pixel may represent mul­tiple frequencies. Using Counter Marker in association with Marker to Peak will result
in the exact frequency of the peak within the pixel to a resolution of 1 Hz.

Set Marker to Channel

Opens a dialog box to enter a channel within the currently active signal standard. The
active marker will move to the center of the selected channel.

Back

Returns to the previous menu.

Figure 3-7. Markers

NOTE: When using the up and down arrows, the active marker moves in
steps defined by the value entered using the
When using the left or right arrow keys, the active marker moves by one
division.

Freq Step soft key (page 3-8).

3-13

Measure

To access the functions under the Measure menu, select the Shift key, then the Measure (4)
key. The Measure menu soft keys are:

Measure

Field

Strength

OCC BW

Channel

Power

ACPR

AM/FM

Demod

C/I

Measurement Off

F Strength

On
Off

Antenna

OCC BW

On
Off

Method

dBc% Int Pwr

%

-->

-->

-->

-->

-->

-->

C/I
On
Off

Center Freq

3.550 GHz

Span

7.100 GHz

Carrier

Signal

Type

-->

Min Sweep Time

50 us

C/I Signal Type

NB FHSS

WB FHSS

Broadband

99.00 %

dBc

3

AM/FM Demod

On
Off

Demod Type

Demod Freq

10.350 MHz

Demod Time

3 s

Set Demod Freq

to Current

Marker Freq

Beat Freq Osc

0 Hz

Volume

Back

-->

Channel Pwr

ACPR

On
Off

Main Ch BW

10.350 MHz

Adj Ch BW

10.350 MHz

Ch Spacing

10.350 MHz

Span

7.100 GHz

-->

Demod Type

FM Wide

Band

FM Narrow

Band

AM

USB

LSB

On

Off

Center Freq

3.550 GHz

Ch Pwr Width

10.350 MHz

Span

7.100 GHz

Figure 3-8. Measure Menu Soft Keys

Field Strength

This measurement allows the use of an antenna with known gain characteristics and mea­sures the field strength over the frequency range of the antenna in units of dBm/meter,
dbV/meter, dBmV/meter, dBµV/meter, volts/meter or watts/meter.

On Off

Turns field strength measurements on or off.

3-14

Antenna

This soft key brings up a dialog box that lists all the antennas for which the instrument
has data, including both standard antennas and custom antenna that have been added
using Master Software Tools. Use the Up/Down arrow keys or the rotary knob to select
the desired antenna and press

Back

Returns to the previous menu.

OCC BW

Activates the occupied bandwidth menu. Select either % or dBc method of occupied band­width measurement.

Method % Down/dBc Down

Select either the % of Power (default) or dB Down measurement method as displayed
in the message area.

%

Use the keypad, the directional arrow keys or the rotary knob to enter the percent of
power, from 0 to 99%.

dBc

Use the keypad, the directional arrow keys or the rotary knob to enter the dBc value (0
to 120 dB).

Back

Returns to the previous menu.

Enter.

Channel Power

Activates the Channel Power measurement function. Channel Power and Channel Power
Density are measured based on the selection in the Units menu.

On Off

Begins or ends the channel power measurement. When the measurement is on, the
Channel Power information box will appear below the display. The detection method
will automatically be changed to RMS Average when the measurement is started. The
detection method can be modified by pressing the
ing the

Detection soft key.

Center Freq

Activates the center frequency function, and sets the center frequency of the Spectrum
Analyzer for the channel power measurement. Use the keypad, the directional arrow
keys or the rotary knob to enter the center frequency.

Ch Pwr Width

Sets the integration bandwidth for channel power measurement. Use the keypad, the
directional arrow keys or the rotary knob to enter the integration bandwidth.

Span

Sets the channel span for channel power measurement. Use the keypad, the directional
arrow keys or the rotary knob to enter the channel span.

Back

Returns to the previous menu.

Shift and the Sweep keys and select-

ACPR

Accesses a menu of Adjacent Channel Power Ratio measurement options:

On Off

Begins or ends the ACPR measurement.

3-15

Main Ch BW

Sets the bandwidth of the main channel for ACPR measurement. Use the keypad, the
directional arrow keys or the rotary knob to enter the a specific frequency. When using
the keypad, select the

Adj Ch BW

Sets the bandwidth of the adjacent channels for ACPR measurement. Use the keypad,
the directional arrow keys or the rotary knob to enter the a specific frequency. When
using the keypad, select the
input.

Ch Spacing

Sets the channel spacing between the main and adjacent channels. Use the keypad, the
directional arrow keys or the rotary knob to enter the a specific frequency. When using
the keypad, select the

Back

Returns to the previous menu.

AM/FM Demod

The user can select AM, Narrow Band FM (300 µs de-emphasis), Wide Band FM (50 µs
de-emphasis), Upper Sideband or Lower Sideband.

On Off

Turns AM/FM Demodulation on or off.

Demod Type

Provides soft keys to select the type of signal to be demodulated:

GHz, MHz, kHz, or Hz soft key to accept the frequency input.

GHz, MHz, kHz, or Hz soft key to accept the frequency

GHz, MHz, kHz, or Hz soft key to accept the frequency input.

FM Wide Band
FM Narrow Band
AM
USB
LSB

Demod Freq

Use the keypad, the directional arrow keys or the rotary knob to enter the center fre­quency of the signal to be demodulated. This frequency does not have to be within the
current frequency sweep range to which the instrument is set.

Demod Time

Use the keypad, the directional arrow keys or the rotary knob to increase or decrease
the demodulation time, and press the
be set from 100 milliseconds to 500 seconds. The instrument sweeps one time for every
demodulation period. Sweeping pauses during the demodulation time.

Set Demod Freq to Current Marker Freq

Sets the demodulation frequency to the frequency of the current marker.

Beat Freq Osc

Sets the beat frequency of the oscillator to exactly set the demodulation frequency of
USB and LSB signals.

Volume

The current volume setting is displayed on the screen. Use the Up/Down arrow keys or
rotary knob to change the volume, and press the

Enter key to select. The demodulation time can

Enter key to select.

3-16

Back

Returns to the previous menu.

C/I

The Carrier to Interference ratio is a two-step measurement sequence that first measures
the amplitude of a carrier, then, with the carrier turned off, measures the amplitude of all
other interfering signals within the channel bandwidth.

On Off

Starts and stops the carrier to interference measurement.

Center Freq

Use the keypad, the directional arrow keys or the rotary knob to enter the center fre­quency.

Span

Use the keypad, the directional arrow keys or the rotary knob to enter the frequency
span.

Carrier Signal Type

Opens a menu to select the carrier signal type.

NB FHSS (Narrow Band Frequency Hopping Spr ead Spectrum)

Use this setting when the signal being measured is 802.11b.

WB FHSS (Wide Band Frequency Hopping Spread Spectrum)

Use this setting when the signal being measured is 802.11a or 802.11g.

Broadband

Use this setting when the signal being measured is a digital modulation format such
as CDMA, GSM, etc.

Back

Returns to the previous menu.

Min Sweep Time

Set the minimum sweep time for the measurement.

Back

Returns to the previous menu.

3-17

Mode

To access the functions under the Mode menu, select the Shift key, then the Mode (9) key.
Use the rotary knob or Up/Down arrow key to highlight the desired mode, then press
to select.

Preset

To access the functions under the Preset menu, select the Shift key, then the Preset (1) key.
The Preset menu soft keys are:

Preset

Preset

Save

Setup

Recall

Setup

Figure 3-9. Preset Menu Soft Keys

Preset

This key resets the instrument to the default starting conditions of full band sweep, 10 dBm
log reference level, 10 dB/division scaling, 0 dB reference level offset, all measurements
turned off and trigger set to free run.

Enter

Save Setup

Opens a dialog box to name and save the current operating settings, allowing them to be
recalled later to return the instrument to the state it was in at the time the setup was saved.
The saved setup can be named using the keypad to select numbers, the rotary knob to high­light a number or character and pressing the knob to select, or by selecting the soft key for
each letter. Use the
arrows to move the cursor position. Press

Shift key to select an upper case letter. Use the Left/Right directional

Enter to save the setup.

Recall Setup

This soft key brings up a selection box that allows selection and recall of a previously
stored instrument setup. Use the rotary knob or the Up/Down arrow keys to highlight the
saved setup, and press
instrument settings are replaced by the stored setup information. Press the

Enter, the rotary knob, or the Recall soft key to select. All current

Esc key to can-

cel the recall.

3-18

Span

The Span menu is used to set the frequency range over which the instrument will sweep.
For the MS2717A, the span can be set from 10 Hz to 7.1 GHz. The Span can also be set to
zero span.

Press the

Span function key located below the display to access the Span menu. The Span

menu soft keys are:

Span

Span

7.100 GHz

Span Up

1-2-5

Span Down

1-2-5

Full Span

Zero Span

Last Span

Back

-->

Figure 3-10. Span Menu Soft Keys

Span

This soft key shows the current value for span in units of GHz, MHz, kHz or Hz. When the
Span button is pressed, span becomes the active parameter and may be changed. Use the
keypad, the directional arrow keys or the rotary knob to increase or decrease the span fre­quency. If the span is changed by using the up and down arrow keys, the span changes by
the value of the Frequency Step entered in the Frequency menu.

Span Up 1-2-5

This is a convenient way to quickly arrive at a wider span value. The first time the soft key
is pressed, the span value increases to the nearest even value that starts with 1, 2 or 5. For
example if the span is 1.8 MHz, pressing the soft key for the first time changes the span to

2.0 MHz, the next press takes the value to 5.0 MHz and so on.

Span Down 1-2-5

This is a convenient way to narrow the frequency span. The first time the soft key is
pressed, the span value decreases to the nearest even value that starts with 1, 2 or 5. For
example if the span is 1.8 MHz, pressing the soft key for the first time changes the span to

1.0 MHz, the next press takes the value to 500 kHz, then 200 kHz and so on.

3-19

Full Span

Pressing this button sets the span to cover the entire tunable spectrum of the MS2717A
from 0 Hz to 7.1 GHz.

Zero Span

This soft key sets zero span. In this mode the display shows amplitude changes at a single
frequency. This function is frequently used to allow the easy monitoring of power varia­tions over time. For example, if information about the amplitude of an 802.11a access
point signal is needed, the access point frequency would be set as the center frequency , res­olution bandwidth would be set to a value wide enough to encompass the signal and the
tester would walk around the access point usable area while the Spectrum Analyzer
records the amplitude using slow sweep.

Last Span

This soft key returns the span to the most recent span value immediately before a change
was made.

Back

Returns to the previous menu.

3-20

Sweep

T o access the functions under the Sweep menu, select the Shift key, then the Sweep (3) key.
The Sweep menu soft keys are:

Detection

Peak

Sweep

Sweep

Single Continuous

Manual
Trigger

Reset

Sweep

Detection

-->

Min Sweep Time

50 us

Trigger

Type

-->

RMS

Negative

Sample

Back

-->

Trigger

Free
Run

External

Video

Change

Trigger

Position

Manual
Trigger

Back

-->

Figure 3-11. Sweep Menu Soft Keys

Sweep Single/Continuous

This soft key toggles between continuous sweep and single sweep. In single sweep mode,
the results of a sweep are displayed on the screen while the instrument awaits a trigger
event to start a new sweep.

Manual Trigger

Pressing this soft key causes the instrument to make a single sweep when the instrument is
in single sweep mode. This key has no function when the instrument is in continuous
sweep mode.

Reset Sweep

This soft key stops the current sweep, clears trace averaging results, clears the maximum
hold results, if selected, and restarts the sweep at the left side of the screen.

3-21

Detection

Several detection methods tailor the performance of the instrument to meet specific mea­surement requirements. In general, there are more measurement points across the screen
than display points. The various detection methods are different ways of dealing with
selecting which measurement point will be shown at each display point.

Peak

This method causes the largest measurement point to be shown for each display point,
and assures that a narrow peak is not missed.

RMS

This method performs a root-mean-square calculation of all the measurement points in
each display point, and is particularly useful in displaying the average value of noise.

Negative

This method causes the smallest measurement point to be shown for each display point.
T ypically this mode is used to help detect small discrete signals in the presence of
nearly equal values of noise. The display points that contain only noise will tend to
show lower amplitudes than those that contain discrete signals.

Sample

This is the fastest detection method since for each display point only one frequency
point is measured. Use this method when speed is of paramount importance and the
possibility of missing a narrow peak is not important.

Back

Returns to the previous menu.

Min Sweep Time

This function allows a minimum sweep time to be specified. Use the keypad, the direc­tional arrow keys or the rotary knob to set the minimum sweep time from 200 microsec­onds to 4294 seconds. When using the keypad, the available time units are minutes,
seconds, milliseconds and microseconds.

If the required sweep time for accurate measurement is longer than the specified minimum,
then the time required for accurate measurements will prevail.

Trigger Type

Sets the type of trigger to be used.

Free Run

In this mode, a new sweep is started immediately upon completion of an old sweep. No
trigger event is required to initiate a sweep.

External

A TTL signal applied to the
sweep to occur. This mode is used in zero span, and triggering occurs on the rising
edge of the signal. After the sweep is complete, the resultant trace is displayed until the
next trigger signal arrives.

Video

This mode is used in zero span to set the power level at which a sweep is initiated. The
power level can be set from -120 dBm to +20 dBm. The trigger is based on the mea­sured signal level. If no signal reaches or exceeds the trigger level, there will be no
trace on the screen. This mode is available only in Zero Span.

External Trigger BNC input connector causes a single

3-22

Change Trigger Position

This soft key is used in conjunction with video triggering to set the horizontal position
on the display where a signal that meets the video triggering criterion will be placed.
The value can be from 0% to 100%. Zero percent places the triggering event at the left
edge of the screen while 100% places the triggering at the right edge of the screen.
When the trigger position is any value other than 0%, the portion of the trace before the
trigger event is displayed very quickly since the trace data is stored in memory. The
portion of the trace after the trigger point is displayed on the screen at the normal rate
as the signal is swept. This mode is available only in Zero Span.

Back

Returns to the previous menu.

3-23

System

To access the functions under the System menu, select the Shift key, then the System (8)
key. The System menu soft keys are:

System

Options

Status

Self

Test

Application

Self

Test

Impedance

50 Ohm 75 Ohm Other

Ext Ref Freq

Back

-->

Application

Options

-->
System
Options

-->

Figure 3-12. System Menu Soft Keys

System Options

Date

&

Time

Ethernet

Config

Language

Brightness

Name

Volume

Reset

Back

-->

-->

Reset

Factory

Defaults

Master

Reset

Update
OS Via

Ethernet

Update
OS Via

USB

Back

-->

3-24

Status

Pressing this soft key displays the current system status, including the operating system
and firmware versions, temperatures and other details. Press

Esc or Enter to return to nor-

mal operation.

Self Test

This soft key initiates a series of diagnostic tests that test the components of the instru­ment. A display will list the individual tests with a pass or fail indication. Press

Enter to return to normal operation.

Esc or

Application Self Test

This soft key initiates a series of diagnostic tests related to the performance of the spec­trum analyzer. A display will list the individual tests with a pass or fail indication. Press

Esc or Enter to return to normal operation.

Application Options

This soft key presents a menu to select application options.

Impedance 50 Ohm/75 Ohm/Other

Select either 50 ohm, 75 ohm, or other impedance value. Selecting 75 ohm selects the

7.5 dB loss of the Anritsu 12N50-75B adapter. For other adapters, select

Other and

enter the appropriate loss.

Ext Ref Freq

Select the frequency of the external reference from the list presented. Valid frequencies
are 1 MHz, 1.2288 MHz, 1.544 MHz, 2.4576 MHz, 4.8 MHz, 4.9152 MHz, 5 MHz,

9.8304 MHz, 10 MHz, 13 MHz and 19.6608 MHz at amplitude from -10 dBm to +10
dBm.

Back

Returns to the previous menu.

System Options

This key opens a selection of system option soft keys.

Date and Time

This soft key brings up a dialog box for setting the current date and time. Use the soft
keys or the Left/Right arrow keys to select the field to be modified. Use the keypad, the
Up/Down arrow keys or the rotary knob to select the date and time. Select
accept the changes, or press the

Esc key to return to normal operation without chang-

Enter to

ing anything.

Ethernet Configuration

This soft key brings up a dialog box to set the IP address of the instrument.

Type Manual/DHCP

This softkey selects whether the address will be entered manually, or supplied auto­matically by a network DHCP server. If Manual is selected, use the soft keys or the
Left/Right arrow keys to select the field to be modified. Use the keypad, the Up/
Down arrow keys or the rotary knob to enter the input. Select
changes, or press the

Esc key to return to normal operation without changing any-

Enter to accept the

thing.

Language

This soft key brings up a selection box allowing selection from a list of built-in lan­guages for the MS2717A displays. The languages currently available are English,
French, German, Spanish, Japanese, Chinese, Korean, and Italian. In addition, a cus­tom language may be selected if it has been defined using the Master Software Tools
software and loaded into the MS2717A. The only limit regarding the number of lan-

3-25

guages that may be loaded into the instrument is the amount of space available in the
memory . Select

Enter to accept the change, or press the Esc key to return to normal

operation without changing anything.

Brightness

The brightness of the display can be adjusted to optimize viewing under a wide variety
of lighting conditions. Use the keypad, the Up/Down arrow keys or the rotary knob to
select a brightness level from 1 to 9, 9 being the brightest. Select

Enter to accept the

change.

Name

Opens a dialog box to name the instrument. The unit can be named using the keypad to
select numbers, the rotary knob to highlight a number or character and pressing the
knob to select, or by selecting the soft key for each letter. Use the

Shift key to select an

upper case letter. Use the Left/Right directional arrows to move the cursor position.
Press

Enter to save the name.

Volume

The current volume setting is displayed on the screen. Use the keypad, the Up/Down
arrow keys or the rotary knob to change the volume and press the

Enter key to accept

the change.

Reset

Opens a menu of reset and update options.

Factory Defaults

Restores the instrument to the factory default values, indluding Ethernet, language
and brightness settings. Press the
then on again to complete. Press

Enter key to initiate the reset, and turn the unit off,

Esc to return to normal operation without resetting.

Master Reset

This will restore factory setting to all system parameters, including Time/Date, Ether­net, language and brightness settings. Also, all user files in the internal memory are
deleted, and the original language and antenna files are restored. Press the
to initiate the reset, and turn the unit off, then on again to complete. Press

Enter key

Esc to

return to normal operation without resetting.

Update OS Via Ethernet

Select this soft key to update the instrument operating system via the Ethernet con­nection. Press Enter to begin the update, or press

Esc to return to normal operation

without updating.

Update OS Via USB

Select this soft key to update the instrument operating system via the USB connec­tion. Press Enter to begin the update, or press

Esc to return to normal operation with-

out updating.

Back

Returns to the previous menu.

3-26

Trace

Trace A Ops

Trace
Trace
A B C

View

Blank

Write

Hold

Trace A

Operations

Trace B

Operations

Trace C

Operations

Save/Recall

Full Screen

On Off

Normal ->A

Max Hold->A

Min Hold->A

Average->A

# of Averages

10

-->

-->

-->

-->

-->

Save/Recall

Save

Setup

Recall
Setup

Save

Measurement

Recall

Measurement

Trace B Ops

A->B

B<->C

Trace C Ops

A->C

B<->C

Max Hold->C

Min Hold->C

A-B->C

B-A->C

Delete

Copy All

to

External Card

Copy All

from

External Card

Save

Screen

as JPEG

Figure 3-13. Trace Menu

To access the functions under the Trace menu, select the Shift key, then the Trace (5) key.
The MS2717A is capable of displaying up to three traces, one with live data, and the other
two either with stored data or trace math data.

Trace A

, B, C

This soft key selects which trace is the active trace. The active trace is the one that is
underlined. As the key is pressed, the underline advances from A to B to C and back to A.

View Blank

This soft key toggles the currently active trace to be either visible or hidden.

3-27

Write/Hold

Selects if the currently active trace will continue to sweep and be updated or to hold the
current trace on screen. This is not applicable to traces B or C unless trace math involving
trace A is active.

Trace A Operations

This soft key activates a menu of functions available for Trace A.

Normal ->A

Displays the current trace data as Trace A.

Max Hold ->A

Trace A shows the cumulative maximum value of each display point over many traces.

Min Hold ->A

Trace A shows the cumulative minimum value of each display point over many traces.

Average ->A

Trace A shows a running average of a number of traces. The number of traces averaged
is set using the

# of Averages

Sets the number of traces used for calculating averge display from 1 to 65535.

Trace B Operations

This soft key activates a menu of functions available for Trace B.

A->B

Copies the contents of Trace A to Trace B, overwriting the previous contents of Trace
B.

# of Averages soft key.

B<->C

Exchanges the contents of Traces B and C.

Trace C Operations

This soft key activates a menu of functions available for Trace C.

A->C

Copies the contents of Trace A to Trace C, overwriting the previous contents of Trace
B.

B<->C

Exchanges the contents of Traces B and C.

Max Hold ->C

Trace C shows the cumulattive maximum value of each display point over many traces.
Trace A is unaffected.

Min Hold ->C

Trace C shows the cumulative minimum value of each display point over many traces.
Trace A is unaffected.

A-B->C

Subtracts the value of Trace B from Trace A and places the result in Trace C. This
function is userful for observing the changes in value of live Trace A compared to a
trace stored in Trace B. Display scaling can be set so that the difference is easy to see.

B-A->C

Subtracts the value of Trace A from Trace B and places the result in Trace C. This
function is userful for observing the changes in value of live Trace A compared to a
trace stored in Trace B. Display scaling can be set so that the difference is easy to see.

3-28

Save/Recall

Selecting this soft key opens a list of save and recall function soft keys, as explained in the

File menu section on page .

Full Screen

Increases the size of the X-Y display by hiding the data labels on the left side of the dis­play.

3-29

3-30

Chapter 4 Measurement Fundamentals

Introduction

Measurement fundamentals include the use of additional spectrum analyzer functions
beyond frequency, span, amplitude and marker functions. In particular, this section focuses
on resolution bandwidth, video bandwidth, sweep, and attenuator functions.

Resolution Bandwidth

Resolution Bandwidth is determined by the intermediate frequency (IF) filter bandwidth.
The spectrum analyzer traces the shape of the IF filter as it tunes past a signal. If more than
one IF filter is used in a spectrum analyzer, the narrowest one dominates and is considered
the resolution bandwidth. The choice of resolution bandwidth depends on several factors.
Filters take time to settle. That is, when a signal first appears at the input of the filter, it will
take a while before the signal appears at the output. Additionally, the output of the filter will
take some time to settle to the correct value, so that it can be measured. The narrower the fil­ter bandwidth (resolution bandwidth) the longer the settling time needs to be and so the
slower the sweep speed.

The choice of resolution bandwidth will depend on the signal being measured. If two
closely-spaced signals are to be measured individually , then a narrow bandwidth is required.
If a wider bandwidth is used, then the energy of both signals will be included in the measure­ment. Thus, the wider bandwidth does not have the ability to look at frequencies selectively
but instead simultaneously measures all signals falling within the resolution bandwidth.
Therefore, a broadband measurement would include all signals and noise within the mea­surement bandwidth into a single measurement.

On the other hand, a narrow-band measurement will separate the frequency components,
resulting in a measurement that includes separate peaks for each signal. There are advan­tages to each. The ultimate decision will depend on the type of measurement required by the
user.

There is always some amount of noise present in a measurement. Noise is often broadband
in nature; that is, it exists at a broad range of frequencies. If the noise is included in the mea­surement, the measured value could be in error (too large) depending on the noise level.
With a wide bandwidth, more noise is included in the measurement. With a narrow band­width, less noise enters the resolution bandwidth filter, and the measurement is more accu­rate. If the resolution bandwidth is narrower, the noise floor will drop on the spectrum
analyzer display. This is because the IF filter of the analyzer has been made narrower in
bandwidth, which lets in less noise. As the measured noise level drops, smaller signals that
were previously obscured by the noise can now be measured.

Video Bandwidth

Spectrum analyzers typically use another type of filtering after the detector called video fil­tering. This filter also affects the noise on the display but in a different manner than the reso­lution bandwidth. In video filtering, the average level of the noise remains the same but the
variation in the noise is reduced. Hence, the effect of video filtering is a "smoothing" of the
signal noise. The resultant effect on the analyzer's display is that the noise floor compresses
into a thinner trace, while the position of the trace remains the same.

Changing the video bandwidth (VBW) does not improve sensitivity, but it does improve dis­cernability and repeatability when making low-level measurements. As a general rule of
thumb, most field spectrum analyzer measurements are made at a video bandwidth that is a

4-1

factor of 10 to 100 less than the resolution bandwidth. In the MS2717A Spectrum Analyzer,
this ratio can be specified in the BW menu. For a resolution bandwidth of 30 kHz, the typical
video bandwidth setting options are either 3 kHz or 300 Hz.

Sweep Limitations

With some spectrum analyzers, the user has control over sweep time (the elapsed time of
each sweep, sometimes called scan time). An analyzer cannot be swept arbitrarily fast while
maintaining its specified accuracy, but will have a sweep rate limitation depending on the
resolution bandwidth, video bandwidth, and frequency range selected. The sweep rate is not
usually chosen by the user but is determined by the frequency range swept divided by the
sweep time. The limitation on sweep rate comes from the settling or response time of the res­olution and video bandwidth filters. If an analyzer is swept too quickly, the filters do not
have time to respond, and the measurement is inaccurate. Under such conditions, the ana­lyzer display tends to have a "smeared" look to it, with the spectral lines being wider than
normal and shifted to the right.

Fortunately, the Anritsu Economy Spectrum Analyzer is designed to relieve the user from
having to calculate the sweep speed or experiment to discover a sweep speed that yields
accurate results. When changing the RBW and VBW with Spectrum Analyzer, the sweep
speed automatically changes to the fastest sweep speed that will yield accurate results. The
sweep speed will be faster for a wide RBW or VBW and slower for a narrow RBW or VBW.
The sweep speed can also be changed manually , by pressing the
selecting the
the minimum sweep time entered by the user is less than the value needed to assure accurate
results, the value that delivers accurate results will be used. Regardless of the minimum
sweep time setting, the Spectrum Analyzer will never sweep faster than the RBW and VBW
settings will allow. Spectrum Analyzer is designed to assure that no uncalibrated measure­ment conditions will occur.

Min Sweep Time soft key. Enter a sweep time from 0.02 ms to 4294 seconds. If

Shift and Sweep keys, then

Attenuator Functions

Attenuation adjusts the spectrum analyzer input attenuator. In Auto mode, as the reference
level is increased, the attenuation is increased. In Manual mode, the input attenuation can be
adjusted using the keypad or the Up/Down arrow keys. The attenuator range is 0 to 65 dB, in
5 dB steps. When the preamplifier is on, input attenuation can be either 0 dB or 10 dB.

4-2

Preamplifier Operation

The preamplifier can be turned on and off by pressing the Amplitude key, then selecting the

Preamp On/Off soft key. The preamplifier has a gain of approximately 25 dB and generally

will lower the noise floor by that amount. When the preamplifier is on, input attenuation can
be either 0 dB or 10 dB.

Preamplifier Measurement Example

Figures 4-1 and 4-2 show the same signal with the preamplifier off and then on. Notice that
when the preamplifier is turned on, the noise floor drops significantly allowing spectral
regrowth components that were lost in the noise without the preamplifier to become easily
visible.

Figure 4-1. Preamplifier Off

4-3

Figure 4-2. Preamplifier On

4-4

Chapter 5 Transmitter Measurements

Introduction

There are one-button measurements built into the MS2717A for field strength, occupied
bandwidth, channel power, adjacent channel power ratio, and carrier to interference ratio (C/
I) tests. In addition, AM/FM/SSB demodulation is available to aid in the identification of
interfering signals. This chapter presents brief examples demonstrating the use of these mea­surements.

Occupied Bandwidth Measurement

Occupied bandwidth (OBW) is a common measurement performed on radio transmitters.
This measurement calculates the bandwidth containing the total integrated power occupied
in a given signal bandwidth. There are two different methods of calculation depending on
the technique used to modulate the carrier.

% Down Method

The occupied frequency bandwidth is calculated as the bandwidth containing the specified
percentage of the transmitted power.

dBc Down Method

The occupied frequency bandwidth is defined as the bandwidth between the upper and
lower frequency points at which the signal level is a desired number of dB below the peak
carrier level.

Required Equipment

• Anritsu MS2717A Economy Spectrum Analyzer

• Test Port Extension Cable, Anritsu part number 15NNF50-1.5C

• 30 dB, 50 Watt, bi-directional, DC -18 GHz, N(m) - N(f), Attenuator, Anritsu
42N50A-30 (required if the power level being measured is >+30 dBm)

Procedure

Step 1. Using the test port extension cable and the 30 dB, 50 watt, bi-directional attenua-

tor (if needed) connect the MS2717A to the appropriate transmitter test port or
signal source.

Step 2. Press the

quency using the keypad , the arrow keys, or the rotary knob. If entering a fre­quency using the keypad, the soft key labels change to
Select the appropriate units key. Selecting the

MHz soft key.

Step 3. If the attenuator was connected in Step 1, press the

RL Offset soft key and set the reference level offset to -30 dB to compensate for

the loss in the attenuator.

Step 4. Press the

priate reference level.

Step 5. Press the

to
Step 6. Press the
Step 7. Press the

Choose the measurement method (

soft key . The selected method is underlined.

Freq key followed by the Center Freq soft key and enter the center fre-

GHz, MHz, kHz and Hz.

Enter key has the same affect as the

Amplitude key and select the

Amplitude key then press the Reference Level soft key to set the appro-

Atten Lvl soft key to set the input attenuation level or leave Auto Atten set

On.

BW key to set the resolution bandwidth and video bandwidth if desired.
Shift key then the Measure (4) key followed by the OCC BW soft key.

dBc Down or % Down) by pressing the Method

5-1

Step 8. Press the dBc or % soft keys to adjust the settings as needed. Common values are

99% and 30 dBc.
Step 9. Press the

appear below the graph while occupied bandwidth measurement is on.

On/Off soft key to start the measurement. An information box will

Figure 5-1. Occupied Bandwidth Results Using the % of Power Method

Figure 5-1 shows the occupied bandwidth results using the % of power method on a CDMA
signal. Occupied Bandwidth is a constant measurement; once it is turned on, it remains on
until it is turned off by pressing the
at the end of each sweep.

On/Off soft key again. Occupied bandwidth is calculated

Channel Power Measurement

Channel power measurement is one of most common measurements for a radio transmitter.
This test measures the output power, or channel power, of a transmit ter over the frequency
range. Out-of-specification power measurements indicate system faults, which can be in the
power amplifiers or in filter circuits. Channel Power measurements can be used to validate
transmitter performance, comply with go v e rn ment regulations, or to keep overall system
interference at a minimum.

Frequency and span settings for many signal standards can be automatically set by pressing
the

Frequency key and then the Signal Standard soft key. Choose the desired standard and

press

Enter. Press the Channel # soft key to enter the channel number at which the measure-

ment is to take place.

CDMA Channel Power

The MS2717A can be used to measure CDMA signals in terms of channel power. It is
important to use the proper settings to accurately measure a CDMA signal because a CDMA
signal is different from a CW signal in many respects.

The following are the recommended settings for IS-95 CDMA measurements:

5-2

• CDMA Channel Bandwidth: 1.23 MHz

• Auto RBW setting: 10 kHz

• Auto VBW setting: 3 kHz

These values are set automatically when the appropriate signal standard is selected. Averag­ing may be used if desired.

CDMA Channel Power Measurement

Required Equipment

• MS2717A Economy Spectrum Analyzer

• 30 dB, 50 Watt, bi-directional, DC -18 GHz, N(m) - N(f), Attenuator, Anritsu
42N50A-30 (required if the power level being measured is >+30 dBm)

• Test Port extension cable, Anritsu 15NNF50-1.5C

Procedure

Step 1. Using the test port extension cable and 30 dB attenuator (if needed), connect the

signal source to the input of the attenuator, and connect the output of the attenua­tor to the RF In test port of the MS2717A.

Step 2. Press the

dialog box using the rotary knob or Up/Down arrow keys to highlight the desired
air interface standard. In this case, select

Enter.

Step 3. Press the

arrow keys, or the rotary knob. In this case, select channel

Step 4. If the attenuator was connected in Step 1, press the

reference level offset to

Step 5. Press the

level to
Step 6. Press the
Step 7. Press the

key.
Step 8. Select the

trum Analyzer is set to that of the CDMA signal, 1.9326 GHz in this example.

This value is automatically set when the air interface standard and channel num-

ber are selected.
Step 9. Press the

MHz.
Step 10. Press the

Freq key followed by the Signal Standard soft key. Scroll thro ugh the

CDMA US PCS - Downlink and press

Channel# soft key and enter the channel number using the keypad , the

50.

RL Offset soft key and set the

-30 dB to compensate for the loss of the attenuator.

Amplitude key and select the Reference Level soft key. Set the reference

-50 dBm.
Scale soft key and set the scale to 10 dB/division.
Shift key then the Measure (4) key, and select the Channel Power soft

Center Freq soft key and verify that the center frequency of the Spec-

Int BW soft key and verify that the integration bandwidth is set to 1.23

Span soft key and verify that the span is set to 3.69 MHz.

NOTE: The integration bandwidth is defined as the frequency span in
which the spectrum analyzer integrates measured power readings, while
the channel span is the frequency range of the analyzer sweeps.

Step 11. Make the measurement by pressing the

On/Off soft key. The MS2717A displays

the measurement results in the message area.

NOTE: Channel power is a constant measurement. Once it is turned on, it
will remain on until it is turned off by pressing the

On/Off key again.

GSM Channel Power Measurement

Global Systems for Mobile (GSM) communication is a globally accepted standard for digital
cellular communication. There are three frequency bands allocated to GSM mobile phones,
one at 850 MHz, one at 900 MHz, and another at 1800 MHz. GSM uses a combination of
Frequency Division Multiple Access (FDMA) and Time Division Multiple Access (TDMA).
Within each band are approximately one hundred available carrier frequencies on 200 kHz
spacing (FDMA), and each carrier is broken up into time-slots so as to support eight separate
conversations (TDMA). Each channel has an uplink and a downlink, 80 MHz apart. GSM
uses the Gaussian Minimum Shift Keying (GMSK) modulation method. Due to the nature of

5-3

TDMA, GSM transmitters ramp RF power rapidly. If the transmitter keys on too quickly,
users on different frequencies (especially those close to the channel of interest) may experi­ence significant interference. This is one of the reasons that spurious measurements are
extensively used in GSM applications.

Required Equipment

• MS2717A Economy Spectrum Analyzer

• Test Port extension cable, Anritsu 15NNF50-1.5C

Procedure

Step 1. Using the test port extension cable, connect the signal source to the

RF In test port

of the MS2717A.

Step 2. Press the

ence level to

Amplitude key and select the Reference Level soft key to set the refer-

-20 dBm. Adjust the values given in this procedure to match your

measurement conditions.
Step 3. Press the
Step 4. Press the
Step 5. Press the

Scale soft key and set the scale to 10 dB/division.

BW key and verify that RBW Auto and VBW Auto are On.
Freq key followed by the Signal Standard soft key. Scroll th rough the

dialog box using the rotary knob or Up/Down arrow keys to highlight the

GSM900 standard for the measurement and press
Step 6. Press the

Channel# soft key and enter the channel number using the keypad , the

Enter.

arrow keys, or the rotary knob. For this example, select Channel 60.
Step 7. Press the

Shift key then the Measure (4) key and press the Channel Power soft

key.
Step 8. Select the

Center Freq soft key and verify that the center frequency of the Spec-

trum Analyzer is set to that of the GSM signal, in this case 947.0 MHz.
Step 9. Select the

Int BW soft key and enter 200 kHz for the integration bandwidth, or set

the integration bandwidth appropriate for the particular application.
Step 10. Select the

Span soft key and enter 800 kHz as the channel span, or set the channel

span to a value appropriate for the particular application.
Step 11. Make the measurement by pressing the

Measure soft key. The MS2717A displays

the measurement results in the message area.

NOTE: Channel Power is a constant measurement. Once it is turned on, it
will remain on until it is turned off by pressing the

On/Off soft key again.

AMPS Channel Power Measurement

The MS2717A can be used to test Advanced Mobile Phone System (AMPS) base stations.
These systems are narrow-band FM voice transceivers with system control functionality.
The energy of the AMPS signal is represented by multiple narrow band FM channels spread
over a wide frequency range. AMPS frequency allocations are within the 800 and 900 MHz
cellular telephone spectrum. Each service provider can use half of the 825-845 MHz range
for receiving signals from cellular phones and half the 870-890 MHz range for transmitting
to cellular phones. The bands are divided into 30 kHz channels with 12 kHz maximum fre­quency deviation.

Required Equipment

• MS2717A Economy Spectrum Analyzer

• Test Port extension cable, Anritsu 15NNF50-1.5C

• 30 dB, 50 Watt, bi-directional, DC -18 GHz, N(m) - N(f), Attenuator, Anritsu
42N50A-30 (required if the power level being measured is >+30 dBm)

5-4

Procedure

Step 1. Using the test port extension cable, and the 30 dB attenuator if needed, connect

the signal source to the input of the attenuator, and connect the output of the atten­uator to the

Step 2. If the attenuator was connected in Step 1, press the

RL Offset soft key and set the reference level offset to -30 dB to compensate for

RF In test port of the MS2717A.

Amplitude key and select the

the loss in the attenuator.

Step 3. Press the

ence level to
Step 4. Press the
Step 5. Press the

Amplitude key and select the Reference Level soft key to set the refer-

-50 dBm.
Scale soft key and set the scale to 10 dB/division.
Amplitude key followed by the Auto Atten soft key if needed to turn On

auto attenuation.
Step 6. Press the
Step 7. Press the

needed to select
Step 8. Press the

BW key and verify that RBW Auto and VBW Auto are On.
Shift key then the Trace (5) key. Press the Trace Mode soft key as

Max (maximum hold).

Shift key then the Measure (4) key and press the Channel Power soft

key.
Step 9. Select the

Center Freq soft key and set the center frequency of the Spectrum Ana-

lyzer to that of the signal, in this example 888.852728 MHz.
Step 10. Select the
Step 11. Select the

Int BW soft key and enter 30 kHz for the integration bandwidth.

Channel Span soft key and enter 90 kHz as the channel span, or set the

channel span to a value appropriate for the particular application.
Step 12. Make the measurement by pressing the

On/Off soft key.

NOTE: Channel Power is a constant measurement. Once it is turned on, it
will remain on until it is turned off by pressing the

On/Off soft key again.

Adjacent Channel Power Ratio

Another common transmitter measurement is that of Adjacent Channel Power Ratio
(ACPR), or adjacent channel leakage power. This is defined as the ratio of the amount of
leakage power in an adjacent channel to the total transmitted power in the main channel.
This measurement can be used to replace the traditional two-tone intermodulation distortion
(IMD) test for system non-linear behavior.

The result of an ACPR measurement is expressed as a power ratio. In order to calculate the
upper and lower adjacent channel values, the MS2717A needs to know the values of four
parameters:

• Main Channel Center Frequency

• Measurement Channel Bandwidth

• Adjacent Channel Bandwidth

• Channel Spacing

When a signal standard is selected from the list in the MS2717A, these four values are auto­matically set for that signal standard.

Adjacent Channel Power Measurement

Required Equipment

• MS2717A Economy Spectrum Analyzer

• 30 dB, 50 watt, Bi-Directional, DC - 18 GHz, N(m) - N(f), Attenuator, Anritsu
42N50A-30 (if needed for the power level being measured)

• Test Port extension cable, Anritsu 15NNF50-1.5C

5-5

Procedure

Step 1. Using the test port extension cable, and the 30 dB attenuator if needed, connect

the signal source to the input of the attenuator, and connect the output of the atten­uator to the

Step 2. If the attenuator was connected in Step 1, press the

RL Offset soft key and set the reference level offset to -30 dB to compensate for

RF In test port of the MS2717A.

Amplitude key and select the

the loss of the attenuator.

Step 3. Press the

Amplitude key and select the Reference Level soft key to set the refer-

ence level to the appropriate reference level.

Step 4. Press the

Atten Lvl soft key to set the input attenuation level needed for the mea-

surement. This value depends on the input power level and any external attenua­tor. Enter an attenuation level to achieve roughly -40 dBm at the input mixer.

Step 5. Press the

BW key and verify that RBW Auto and VBW Auto are On.

Step 6. There are two ways to set the measurement parameters. If the signal standard and

channel are known, press the

Channel

soft keys for the signal to be measured then skip to Step 12. If the signal

Freq key and set the Signal Standard and Select

standard and channel are not known, follow the procedure in Steps 6 through 11
below.

Step 7. Press the

Freq key, select the Center Freq soft key, and enter the desired center

frequency.
Step 8. Press the
Step 9. Press the

Shift key then the Measure key and press the ACPR soft key.

Main Ch BW soft key, and enter the desired main channel bandwidth. For

an IS-95 CDMA signal, enter 1.23 MHz.
Step 10. Press the

Adj Ch BW soft key, and enter the desired adjacent channel bandwidth.

For an IS-95 CDMA signal, enter 1.23 MHz.
Step 11. Press the

Ch Spacing soft key , and enter the desired channel spacing. For an IS-95

CDMA signal, enter 1.23 MHz.
Step 12. Begin making measurement by pressing the

On/Off soft key. The MS2717A dis-

plays the measurement results in the message area.

NOTE: Adjacent Channel Power Ratio is a constant measurement. Once it
is turned on, it will remain on until it is turned off by pressing the On/Off key
again.

GSM Adjacent Channel Power Measurement

Required Equipment

• MS2717A Economy Spectrum Analyzer

• 30 dB, 50 watt, Bi-Directional, DC - 18 GHz, N(m) - N(f), Attenuator, Anritsu
42N50A-30 (if required for the power level being measured)

• Test Port extension cable, Anritsu 15NNF50-1.5C

Procedure

Step 1. Using the test port extension cable and 30 dB attenuator, connect the signal source

to the input of the attenuator, and connect the output of the attenuator to the
test port of the MS2717A.

Step 2. If the attenuator was connected in Step 1, press the

reference level offset to

Step 3. Press the

ence level to

Step 4. Press the

Amplitude key and select the Reference Level soft key to set the refer-

60 dBm.

Atten Lvl soft key to set the input attenuation level needed for the mea-

-30 dB to compensate for the loss of the attenuator.

surement. This value depends on the input power level and any external attenua­tor. Enter an attenuation level to achieve roughly -40 dBm at the input mixer.

Step 5. Press the

BW key and verify that RBW Auto and VBW Auto are On.

RL Offset soft key and set the

RF In

5-6

Step 6. There are two ways to set the measurement parameters. If the signal standard and

channel are known, press the

Channel

soft keys for the signal to be measured then skip to Step 12. If the signal

Freq key and set the Signal Standard and Select

standard and channel are not known, follow the procedure in Steps 7 through 12
below.

Step 7. Press the

Freq key, select the Center Freq soft key, and enter the desired center

frequency.
Step 8. Press the
Step 9. Select the
Step 10. Select the
Step 11. Select the
Step 12. Make the measurement by pressing the

Shift key then the Measure key and select the ACPR soft key.

Main Ch BW soft key, and enter the main channel bandwidth.
Adj Ch BW soft key , and enter the adjacent channel bandwidth.
Ch Spacing soft key, and enter the channel spacing.

On/Off soft key. The detection method is

automatically changed to RMS Average.
Solid vertical lines are drawn on the display to indicate the main channel. Dashed vertical
lines define the adjacent channels. The MS2717A will display the measurement results in
the message area.

NOTE: Adjacent Channel Power Ratio is a constant measurement. Once it
is turned on, it will remain on until it is turned off by pressing the

On/Off soft

key again.

AMPS (TDMA) Adjacent Channel Power Measurement

Required Equipment

• MS2717A Economy Spectrum Analyzer

• 30 dB, 50 watt, Bi-Directional, DC - 18 GHz, N(m) - N(f), Attenuator, Anritsu
42N50A-30 (if needed for the power level being measured)

• Test Port extension cable, Anritsu 15NNF50-1.5C

Procedure

Step 1. Using the test port extension cable, and the 30 dB attenuator if needed, connect

the signal source to the input of the attenuator, and connect the output of the atten­uator to the

Step 2. If the attenuator was connected in Step 1, press the

RL Offset soft key and set the reference level offset to -30 dB to compensate for

RF In test port of the MS2717A.

Amplitude key and select the

the loss in the attenuator.

Step 3. Press the

ence level to
Step 4. Press the
Step 5. Press the
Step 6. Press the
Step 7. Press the
Step 8. Press the

Amplitude key and select the Reference Level soft key to set the refer-

-50 dBm.
RL Offset soft key to set the reference level offset to -30 dB.
Auto Atten soft key and set automatic attenuation to On.

Freq key, select the Center Freq soft key, and enter 835 MHz.
Shift key then the Measure key and press the ACPR soft key.

Main Ch BW soft key to enter the main channel bandwidth. For an

AMPS signal, enter 30 kHz.

Step 9. Press the

Adj Ch BW soft key, and enter the adjacent channel bandwidth. For an

AMPS signal, enter 30 kHz.

Step 10. Select the Ch Spacing soft key, and enter the channel spacing. For an AMPS sig-

nal, enter 30 kHz.

Step 11. Make the measurement by pressing the

On/Off soft key.

5-7

The detection method is automatically changed to RMS Average. Solid vertical lines are
drawn on the display to indicate the main channel. Dashed vertical lines define the adjacent
channels. The MS2717A will display the measurement results in the message area.

NOTE: Adjacent Channel Power Ratio is a constant measurement. Once it
is turned on, it will remain on until it is turned off by pressing the

On/Off soft

key again.

Out-of-Band Spurious Emission Measurement

Required Equipment

• MS2717A Economy Spectrum Analyzer

• Test Port extension cable, Anritsu 15NNF50-1.5C

Procedure

Step 1. Using the test port extension cable, connect the signal source to the

of the MS2717A.
Step 2. Press the
Step 3. Press the

bandwidth and upper and lower channel bandwidths.
Step 4. Press the

ence level to
Step 5. Press the
Step 6. Press the

width to
Step 7. Press the

The underlined number indicates the active marker.
Step 8. Press the

the marker over one of the spurs.
Step 9. Compare the value of the marker to the specified allowable level of out-of-band

spurious emissions for the corresponding channel transmit frequency.
Step 10. Repeat Steps 9 and 10 for the remaining spurs. Use either Marker 1 again, or

choose another marker. Figure 5-2 shows a simulated out-of-band spurious signal

21.000 MHz from the carrier using a delta marker.

Freq key, select the Center Freq soft key, and enter the center frequency.
Span key. Set the span wide enough to include the primary channel

Amplitude key, then press the Refe rence Level soft key and set the refer-

-20 dBm.
Auto Atten soft key set the attenuation to On.
BW key and use the RBW and VBW soft keys to set the resolution band-

3 kHz and the video bandwidth to 300 Hz.

Marker key and press the Marker 1 2 3 4 5 6 soft key to select marker 1.

On/Off soft key and use the arrow keys, the keypad and the knob to move

RF In test port

Figure 5-2. Simulated Out-of-Band Spurious Emission Measurement

5-8

In-band/Out-of-Channel Measurements

The in-band/out-of-channel measurements are those measurements that measure distortion
and interference within the system band, but outside of the transmitting channel. These mea­surements include in-band spurious emissions and adjacent channel power ratio (also called
spectral regrowth). There are stringent regulatory controls on the amount of interference that
a transmitter can spill to neighboring channels. In order to determine compliance with the
allowable level of spurious emissions, two parameters need to be specified:

• Measurement channel bandwidth

• Allowable level of spurious emissions

In-band Spurious Measurement

Required Equipment

• MS2717A Economy Spectrum Analyzer

• 30 dB, 50 watt, Bi-Directional, DC - 18 GHz, N(m) - N(f), Attenuator, Anritsu
42N50A-30

• Test Port extension cable, Anritsu 15NNF50-1.5C

Procedure

Step 1. Using the test port extension cable and 30 dB, 50 wa tt, Bi-directional attenuator,

connect the MS2717A to appropriate transmit test port.
Step 2. Press the
Step 3. Press the

bandwidth and upper and lower channel bandwidths.
Step 4. Press the

reference level to
Step 5. Select the

sate for the loss of the attenuator
Step 6. Press the
Step 7. Press the

width to 10 kHz and the video bandwidth to 300 Hz.
Step 8. Press the

The underlined number indicates the active marker.
Step 9. Press the

the marker over one of the spurs.
Step 10. Compare the value of the marker to the specified allowable level of in-band/out-

of-channel spurious emissions for the corresponding channel transmit frequency.
Step 11. Repeat steps 9 and 10 for the remaining spurs. Use either Marker 1 again, or

choose another marker.

Freq key, select the Center Freq soft key, and enter the center frequency.
Span key. Set the span wide enough to include the primary channel

Amplitude key and then press the Reference Level soft key to set the

-20 dBm.

RL Offset soft key to set the reference level offset to -30 dB to compen-

Auto Atten soft key set the attenuation to On.

BW key and use the RBW and VBW soft keys to set the resolution band-

Marker key and press the Marker 1 2 3 4 5 6 soft key to select marker 1.

On/Off soft key and use the arrow keys, the keypad and the knob to move

5-9

Figure 5-3 shows a simulated in-band spur at 1 .625 MHz from the carrier frequency. The
carrier is measured by M1. The delta marker on M1 shows the signal at fc+ 1.625 MHz to be

60.17 dB down from the carrier. These values should be compared against the specification
for the transmitter being tested.

Figure 5-3. In-band Spurious Measurement

NOTE: The resolution bandwidth of a spectrum analyzer is de termined by
the intermediate frequency (IF) filter bandwidth. The MS2717A traces the
shape of the IF filter as it sweeps past a signal. Therefore, if two equal­amplitude signals are very close to each other, the measurement result
can appear to be one single response because the IF or resolution band­width is not small enough to resolve the two signals. Similarly, if two sig­nals are not equal in amplitude but are very close together, the smaller
signal may not be seen because it is hidden under the large response.

5-10

Field Strength

Required Equipment

• MS2717A Economy Spectrum Analyzer

• Portable Antenna for which antenna factors or antenna gain and bandwidth data are
available.

Procedure

Step 1. Press the
Step 2. Press the Antenna soft key and use the Up/Down arrow keys or the rotary knob to

select the desired antenna. Press the

NOTE: Select an antenna from the standard list available in the MS2717A,
or use the Antenna Editor feature of Anritsu Master Software Tools (see
Chapter 6) to define a custom antenna and upload the antenna information
to the MS2717A antenna list.

Step 3. Connect the antenna to the MS2717A.
Step 4. Press the
Step 5. Press the

bandwidth and upper and lower channel bandwidths.
Step 6. Press the
Step 7. T o change the units of measurement, press the

Units soft key and select dBm, dBV, dBmV or dBµV.

Step 8. Select either the

adjusts the measurement by the antenna factors selected. Marker values will be

displayed in the same units as selected for the amplitude.

Antenna Calculations

The following is a list of various antenna calculations should you find it necessary to convert
from one to another:

Shift key then the Measure key and press the Field Strength soft key.

Enter key to select.

Freq key, select the Center Freq soft key, and enter the center frequency.
Span key. Set the span wide enough to include the primary channel

BW key and verify that RBW Auto and VBW Auto are On.

Amplitude hard key , then press the

Volts or Watts soft key, as required. The MS2717A automatically

Conversion of signal levels from W to V in a 50 ohm system:

2

P=V

/R

where:

P = power in Watts
V = voltage level in Volts
R = resistance in Ohms

Note that 1 mW = 10

-3

W and 1µV = 10-6V.

For power in dBm, and voltage in dB(µV).

V

dB(µV)

= P

(dBm)

+ 107 dB

Power density to field strength. An alternate measure of field strength to electric field is
power density:

2

/120p

Pd=E

where:

E = field strength in V/m
P = Power density in W/m

5-11

Power density at a point:

d=PtGt

/(4 pr2)

P

In the far field, where electric and magnetic fields are related by the impedance of free
space:

Where P

= power transmitted in Watts

P

t

G

r

= power density in W/m

d

= gain of transmitting antenna

r = distance from the antenna in meters

AM/FM/SSB Demodulation

The MS2717A built-in demodulator for AM, narrowband FM, wideband FM and single
sideband (selectable USB and LSB) allows a technician to hear an interfering signal to ease
identification. The demodulated signal can be heard using either the built-in speaker, or
through a monaural cellular headset connected to the 2.5-mm jack on the test panel.

Demodulation Procedure

Step 1. Press the

key.
Step 2. Press the

USB, or LSB to match the modulation format of the signal .

Step 3. Press the
Step 4. Press the

ter frequency of the signal to be demodulated. For USB and LSB signals, fine tune

the signal by adjusting the

zero, meaning that the re-injected carrier is exactly at the demodulation frequency.

The

fine tune the signal through a span of ±10000 Hz.
Step 5. Press the
Step 6. Press the

change the audio volume from 0% to 100%. For most cellular headsets a volume

of 40% is adequate.
Step 7. The

the signal. Enter a value from 100 ms to 500 seconds.

Shift key followed by the Measure (4) key and the AM/FM Demod soft

Demod Type soft key and select FM Wide Band, FM Narrow Band, AM,

Back soft key.
Demod Freq soft key and use the keypad or rotary knob to enter the cen-

Beat Freq Osc. By default the BFO frequency is set to

Beat Freq Osc soft key allows adjustment of the beat frequency oscillator to

On/Off soft key to enable the measurement.
Volume soft key and use the Up/Down arrow keys or rotary knob to

Demod Time soft key sets the time the Spectrum Analyzer will demodulate

Carrier to Interference Ratio Measurement

Carrier to Interference Ratio (C/I) Measurement is a two-step process, first measuring the
carrier level and then, with the carrier turned off, measuring the remaining signals and noise
in the band of interest. After the two measurements are complete, the ratio of the carrier
level to the noise plus interference is displayed using three assumptions:

• The interferer is a narrowband frequency hopping signal (NB FHSS)

• The interferer is a wideband frequency hopping signal (WB FHSS)

• The interferer is a broadband signal (BB).

The primary application for this type of measurement is determining the magnitude of inter­ference problems for 802.11b, 802.11g and 802.11a access points (hot spots).

Procedure

Step 1. Press the

Frequency key followed by the Signal Standard soft key. Select the

appropriate signal standard based on the signal to be measured and press
Step 2. Press the

being measured and press
Step 3. Press the

Select Channel soft key, select the operating channel of the access point

Enter.

Shift key followed by the Measure (4) key and the C/I soft key.

5-12

Enter.

Step 4. Press the Center Freq soft key and enter the desired frequency, unless a Signal

Standard and Channel have already been selected in the
Step 5. If needed, press the

to be measured.
Step 6. If the signal environment includes slow frequency hopping signals, such as cord-

less telephones, press the

ond or more to give a good chance of capturing instances of the interfering signal.
Step 7. Press the

surement.

NOTE: Access to the transmitter is required to complete this procedure as
the transmitted carrier must be turned off for the second portion of the
measurement.

Step 8. After the measurement is complete, the measurement box gives results for the

three different signal types. Some measurement results may show as

this is to be expected.
The following figures show the C/I measurement steps.

On/Off soft key and follow the on-screen prompts to complete the mea-

Span soft key and set an appropriate span width for the signal

Min Sweep Time soft key to set a sweep time of one sec-

Frequency menu.

Error, and

Figure 5-4. C/I Measurement, Ready to Measure the Carrier

5-13

Figure 5-5. C/I Measurement, Carrier Measured

Figure 5-6. C/I Measurement, Results

5-14

Chapter 6 WCDMA/HSDPA Measurements

Introduction

The MS2717A offers WCDMA/HSDPA RF Measurements (Option 44), and WCDMA
Demodulator Measurements (Option 45). This chapter explains the use of these options.

NOTE: The WCDMA Demodulator demodulates only WCDMA signals.

To connect the node B equipment directly to the MS2717A, connect the power amplifier of
the node B equipment to the

NOTE: The maximum input damage level of the RF In port is +43 dBm. To
prevent damage always use a coupler or high power attenuator.

WCDMA/HSDPA Signal Analyzer Mode
Amplitude

RF In connector of the MS2717A using a coupler or attenuator.

Amplitude

Scale

__ __

Power Offset

0.0 dB

Auto Range

OffOn

Adjust
Range

Figure 6-1. WCDMA/HSDPA Amplitude Menu

Scale

The scale can be set in 1 dB steps from 1 dB per division to 15 dB per division. The value
can be changed using the keypad, the rotary knob or the Up/Down arrow keys.

Power Offset

Choose power offset to have the Spectrum Analyzer automatically adjust for the loss
through any external cables, attenuators and couplers. The power can be offset from 0-100
dB. Press the

Power Offset key, enter the values and press the dB softkey.

6-1

Auto Range On/Off

Adjusts the reference level automatically when Auto Range is activated. Toggles between
On and Off.

Adjust Range

Adjust the range adjusts the reference level to be optimal based on the measured signal.

File

To access the functions under the File menu, select the Shift key, then the File (7) key.

File

Save, Recall

Delete, & Copy

Print

Save

On

Event

-->

-->

-->

N/A

Print

Save

Screen

as JPEG

Back

-->

Save/Recall

Save

Setup

Recall
Setup

Save

Measurement

Recall

Measurement

Delete

Copy All

to

External Card

Copy All

from

External Card

Save

Screen

as JPEG

Figure 6-2. WCDMA/HSDPA File Menu

Save / Recall

Selecting this soft key opens a list of save and recall function soft keys, as explained
below. Press the

Back key to return to the File menu.

Save Setup

Opens a dialog box to name and save the current operating settings, allowing them to
be recalled later to return the instrument to the state it was in at the time the setup was
saved. The saved setup can be named using the keypad to select numbers, the rotary
knob to highlight a number or character and pressing the knob to select, or by selecting
the soft key for each letter. Us e the
Right directional arrows to move the cursor position. Press

Recall Setup

This soft key brings up a selection box that allows selection and recall of a previously
stored instrument setup. Use the rotary knob or the Up/Down arrow keys to highlight

6-2

Shift key to select an upper case letter. Use the Left/

Enter to save the setup.

the saved setup, and press Enter, the rotary knob, or the Recall soft key to select. All
current instrument settings are replaced by the stored setup information. Press the

Esc

key to cancel the recall.

Save Measurement

Initiates a dialog box to name and save the current active trace A. The saved measure­ment trace can be named using the keypad to select numbers, the rotary knob to high­light a number or character and pressing the knob to select, or by selecting the soft key
for each letter. Use the

Shift key to select an upper case letter.

Use the Left/Right directional arrows to move the cursor position. Press

Enter to save

the measurement trace. WCDMA measurements are saved with a .wcd extension.

NOTE: If a measurement has been previously saved, the Save Measure­ment dialog box will open with the previously saved name displayed with
an automatically incremented suffix. For instance, if the previously saved
trace was named Trace, the next measurement saved will be named T race
(1), and so on. To save the new measurement with this name, simply press

Enter. To save the new measurement with a similar name, press the Right

directional arrow and add the changes. To create a completly new name,
use the keypad, the rotary knob or select the soft key for each letter.

Recall Measurement

Brings up a selection box that allows recall of a previously stored measurement trace.
Use the rotary knob or the Up/Down arrow keys to highlight the saved measurement
trace, and press

Enter, the rotary knob, or the Recall soft key to select. A recalled trace

may be displayed as trace A, in place of the live trace, or as trace B or C along with the
live trace. Use the rotary knob or the Up/Down arrow keys to highlight the recalled
trace option, and press the

To remove a recalled measurement trace from the screen, select the

Trace (5) key to open the Trace menu. Use the Trace soft key to select the trace to be

removed from the screen and use the
Use the

Trace key to select an active trace after blanking a recalled trace.

Enter key to select. Press the Esc key to cancel the recall.

Shift key and the

View/Blank soft key to view or blank the trace.

Delete

Brings up a selection box that shows all stored setups and traces. The list shows the
setup or trace name, the type (stp for a saved setup, spa for a saved trace, jpg for a
JPEG file) and the date and time the information was saved. Use the rotary knob or the
Up/Down arrow keys to highlight the saved information, and press
knob, or the
information. Press the

Delete soft key to delete. Press the Delete All soft key to delete all saved

Esc key to cancel the operation.

Enter, the rotary

Copy All to External Card

This function copies all stored setups and measurements from the internal memory to
an external Compact Flash memory card.

Copy All from External Card

This function copies all measurements and setups from an external Compact Flash
memory card into the instrument internal memory.

Save Screen as JPEG

This function saves a measurement trace as a graphics file. Screens saved as JPG can­not be recalled from within the unit, but Master Software Tools can extract them for
saving on a PC for printing or inserting into other documents. The saved measurement
can be named using the keypad to select numbers, the rotary knob to highlight a num­ber or character and pressing the knob to select, or by selecting the soft key for each

6-3

letter. Use the Shift key to select an upper case letter. Use the Left/Right directional
arrows to move the cursor position. Press
the file name. The file is saved in the internal memory with the specified name, with
.jpg appended.

Print

The Print key can be used to save a measurement trace as a graphics file. This file can then
be downloaded to a PC using Master Software Tools and printed.

Save Screen as JPEG

This function saves a measurement trace as a graphics file. The saved measurement can
be named using the keypad to select numbers, the rotary knob to highlight a number or
character and pressing the knob to select, or by selecting the soft key for each letter.
Use the
move the cursor position. Press
name. The file is saved in the internal memory with the specified name, with .jpg
appended.

Save On Event

Not applicable in WCDMA/HSDPA Signal Analyzer Mode (Option 44).

Shift key to select an upper case letter . Use the Left/Right directional arrows to

Enter to save the measurement after entering the file

Enter to save the measurement after entering

6-4

Freq (Frequency)

Figure 6-3. WCDMA/HSDPA Freq Menu

Freq

Center Freq

1.000 GHz
Signal

Standard

Channel

- -

Set CF

To Closest

Channel

Decrement

Channel

Increment

Channel

Center Freq

Press the

Freq key followed by the Center Freq soft key and enter the desired frequency

using the keypad, the arrow keys, or the rotary knob. If entering a frequency using the key­pad, the soft key labels change to
Selecting the

Enter key has the same affect as selecting the MHz soft key.

GHz, MHz, kHz and Hz. Select the appropriate units key.

Signal Standard

Use the Up/Down arrow keys or the rotary knob to highlight a signal standard and press

Enter to select. When a signal standard is selected, the center frequency and span for the

first channel of the selected standard is automatically tuned. Other settings, such as chan­nel spacing and integration bandwidth, are also automatically entered. Appendix A con­tains a table of the signal standards that are in the instrument firmware.

Channel

Use the Up/Down arrow keys, the keypad, or the rotary knob to select a channel number
for the selected signal standard. The center of the channel is automatically tuned to the
center frequency of the selected WCDMA channel.

Set CF To Closest Channel

Press the soft key to change the center frequency to the closest channel.

Decrement Channel

Use the Up/Down arrow keys or the rotary knob to decrease the channel number one chan­nel.

Increment Channel

Use the Up/Down arrow keys or the rotary knob to increase the channel number one chan­nel.

6-5

Measurements

RF Measurement

Measurements

Demodulator

Pass

Fail

Mode

-->

-->

-->

Pass Fail Mode

Select

Pass/Fail

Test

Demod

CDP

Codogram

Modulation

Summary

Back

-->

Band

Spectrum

Channel

Spectrum

ACLR

Spectral

Emission

Mask

Spectral
Emission
Summary

RF

Summary

Reset

WCDMA

Summary

Save

Measurement

Back

-->

Figure 6-4. WCDMA Measurements Menu

RF Measurement

Opens the RF measurement menu.

Band Spectrum

Displays the spectrum of the selected band.

Back

-->

6-6

Ref Level

Sets the required reference level.

Scale

Change the scale.

Band Channel

Use the cursor to select the required channel and the unit analyzes the selected chan­nel signal.

Previous Band

The unit automatically selects the previous band.

Next Band

The unit automatically selects the next band.

Back

Returns to the previous menu.

Channel Spectrum

Displays the spectrum of the selected channel. The screen also displays Channel Power
in dBm and watts, Peak to Average power and Occupied Bandwidth.

ACLR

Displays the Adjacent Channel Leakage Ratio (ACLR). The user can set the main
channels and adjacent channels from 1-4 channels. This screen can display up to 12
channels total.

Display Trace

Select ON to display the trace.

Select # of Main Channels

Set the main channels from 1-4 channels.

Select # of Adjacent Channels

Set the adjacent channels from 1-4 channels.

Back

Returns to the previous menu.

Spectral Emission Mask

Displays the received signal and the mask based on received signal strength.

Spectral Emission Summary

Displays the spectral emission mask in table format and whether the received signal
passed in each frequency range.

RF Summary

Displays the RF measurements in table form.

Back

Returns to the previous menu.

Demodulator

Spectrum Analyzer in demodulator mode demodulates the received WCDMA signal. The
demodulator has three displays, CDP, Codogram and Modulation Summary.

6-7

CDP

When Code Domain Power (CDP) is selected the screen displays all the selected OVSF
codes and selected OVSF zoom codes in the graphical format. The display also dis­plays P-CPICH Abs power, EVM, Carrier Frequency, Channel Power, Carrier
Feedthrough, Frequency Error in Hz and PPM, Noise Floor and Peak CD Error. The
screen also displays CPICH, P-CCPCH, S-CCPCH, PICH, P-SCH and S-SCH powers
in the table format. If the marker is set on the code, the marker will display the code
number, power and Symbol EVM.

Zoom

Select a zoom function of 32, 64 or 128 codes.

Zoom Start

Enter the required zoom start code. For example, to start at code 2, enter 2.

NOTE: For the WCDMA/HSDPA demodulator option, the CDP screen dis­plays HSDPA and WCDMA signals. P-CPICH Abs power, EVM, Carrier
Frequency, Channel Power, Carrier Feedthrough, Frequency Error in Hz
and PPM, Noise Floor and Peak CD Error are also displayed. The screen
displays CPICH, P-CCPCH, S-CCPCH, PICH, P-SCH and S-SCH powers
in the table format. If the marker is se t on the code, th e marker wi ll display
the code number, power and Symbol EVM.

Codogram

When Codogram is selected the screen displays the changes in code power levels over
time. Two graphs are displayed on the screen, the top one displays all the selected
OVSF codes and the bottom one displays the selected OVSF zoom codes.

Zoom

Select a zoom function of 32, 64 or 128 codes.

Zoom Start

Enter the required zoom start code. For example, to start at code 2, enter 2.

Total Time

Use the keypad, the Up/Down arrow keys, or the rotary knob to enter t he total ti me to
display the changes in code power levels. The maximum total time for Codogram is
72 hours.

Single Sweep Time

Single sweep time is related to total time. Use the keypad, the Up/Down arrow keys,
or the rotary knob to set the single sweep time.

Modulation Summary

Displays the demodulation parameters in the table format.

Back

Returns to the previous menu.

Pass/Fail Mode

The Spectrum Analyzer saves the five test model conditions specified in the 3GPP specifi­cation to test the base station. After the selected test model, the unit displays whether the
base station passed or failed the test. Using Master Software Tools, a custom test list can be
created and downloaded into the unit. All critical measurements can be selected for pass
fail testing including each individual code power, spreading factor and symbol EVM. The
results are displayed in table format with clear identification of pass/fail results including
min/max thresholds and measured results.

6-8

Select Pass/Fail Test

Select the parameters file from the list.

Reset

Restart the measurement.

Back

Returns to the previous menu

WCDMA Summary

Displays the critical WCDMA measurements in a table format.

Save Measurement

Initiates a dialog box to name and save the current measurement. The saved measurement
can be named using the keypad to select numbers, the rotary knob to highlight a number or
character and pressing the knob to select, or by selecting the soft key for each letter. Use
the

Shift key to select an upper case letter. Use the Left/Right directional arrows to move

the cursor position. Press

Enter to save the measurement WCDMA measurements are

saved with a .wcd extension.

NOTE: If a measurement has been previously saved, the Save Measure­ment dialog box will open with the previously saved name displayed. To
save the new measurement with a similar name (for example, Trace-1,
Trace-2, etc.) simply press the Right directional arrow and add the
changes. To create a completely new name, use the keypad, the rotary
knob or select the soft key for each letter.

Mode

To access the functions under the Mode menu, select the Shift key, then the Mode (9) key.
The available modes will vary depending upon the options installed. Use the directional
arrow keys or the rotary knob to highlight the selection and press the

Enter key to select.

Preset

Preset

Preset

Save

Setup

Recall

Setup

Figure 6-5. WCDMA/HSDPA Preset Menu

To access the functions under the Preset menu, select the Shift key, then the Preset (1 ) key.

Preset

This key resets the instrument to the default starting conditions of full band sweep, 10 dBm
log reference level, 10 dB/division scaling, 0 dB reference level offset, all measurements
turned off and trigger set to free run.

6-9

Save Setup

Opens a dialog box to name and save the current operating settings, allowing them to be
recalled later to return the instrument to the state it was in at the time the setup was saved.
The saved setup can be named using the keypad to select numbers, the rotary knob to high­light a number or character and pressing the knob to select, or by selecting the soft key for
each letter. Use the
arrows to move the cursor position. Press

Recall Setup

This soft key brings up a selection box that allows selection and recall of a previously
stored instrument setup. Use the rotary knob or the Up/Down arrow keys to highlight the
saved setup, and press
instrument settings are replaced by the stored setup information. Press the
cel the recall.

Setup

Shift key to select an upper case letter. Use the Left/Right directional

Enter to save the setup.

Enter, the rotary knob, or the Recall soft key to select. All current

Esc key to can-

Setup

Scrambling Code

ManualAuto

Manual Scrambling Code

493

Max Spreading Factor

S-CCPCH Spread

S-CCPCH Code

Figure 6-6. WCDMA/HSDPA Setup Menu

Auto Scrambling

Press the Auto Scrambling soft key to automatically select the scrambling code. This key
toggles Auto Scrambling On or Off.

256 512

Select

Reference

Frequency

256

3

PICH Code

16

Threshold

OffOn

6-10

Scrambling Code

Press the Scrambling Code soft key to manually enter the scrambling code using the num­ber keys or the rotary knob.

Max Spreading Factor

Press the Max spreading factor to toggle between 256 and 512 codes.

Select Reference Frequency

Press Select reference frequency and select from the displayed list using Up/Down arrow
keys or rotary knob and press enter.

S-CCPCH Spread

Press S-CCPCH Secondary Common Control Physical Channel soft key to enable the S­CCPCH spreading factor and enter the desired code. The default value is 256.

S-CCPCH Code

Press S-CCPCH code to enable and enter the S-CCPCH code. The default value is 3.

PICH Code

Press PICH to activate Paging Indicator Channel and enter the desired code. The default
value is 16.

Threshold

Change the measurement threshold by pressing threshold softkey and entering a desired
value and pressing enter softkey. The default value is -30 dB.

6-11

System

System

Status

Self

Test

Application

Self
Test

Options

Impedance

50 Ohm 75 Ohm Other

Ext Ref Freq

Back

-->

Application

Options

-->

System

Options

-->

Figure 6-7. WCDMA/HSDPA System Menu

System Options

Date

&

Time

Ethernet

Config

Language

Brightness

Name

Volume

Reset

Back

-->

Reset

Factory

Defaults

Master

Reset

Update
OS Via

Ethernet

Update
OS Via

USB

-->

Back

-->

To access the functions under the System menu, select the Shift key, then the System (8)
key.

Status

Pressing this soft key displays the current system status, including the operating system
and firmware versions, temperatures and other details such as current battery information.
Press

Esc or Enter to return to normal operation.

Self Test

This soft key initiates a series of diagnostic tests that test the components of the instru­ment. A display will list the individual tests with a pass or fail indication. Press

Enter to return to normal operation.

6-12

Esc or

Application Self Test

This soft key initiates a series of diagnostic tests related to the performance of the
MS2717A in WCMDA mode. A display will list the individual tests with a pass or fail
indication. Press

Esc or Enter to return to normal operation.

Application Options

This soft key presents a menu to select application options.

Select Reference Frequency

This soft key brings up a dialog box for selecting the Reference Frequency. Use the
rotary knob or the Up/Down arrow keys to highlight the Reference Frequency and
press

Enter to select, or press the Esc key to cancel.

Back

Returns to the previous menu.

System Options

This key opens a selection of system option soft keys.

Date and Time

This soft key brings up a dialog box for setting the current date and time. Use the soft
keys or the Left/Right arrow keys to select the field to be modified. Use the keypad, the
Up/Down arrow keys or the rotary knob to select the date and time. Select
accept the changes, or press the

Esc key to return to normal operation without chang-

Enter to

ing anything.

Ethernet Configuration

This soft key brings up a dialog box to set the IP address of the instrument.

Type Manual/DHCP

This softkey selects whether the address will be entered manually, or supplied auto­matically by a network DHCP server. If Manual is selected, use the soft keys or the
Left/Right arrow keys to select the field to be modified. Use the keypad, the Up/
Down arrow keys or the rotary knob to enter the input. Select
changes, or press the

Esc key to return to normal operation without changing any-

Enter to accept the

thing.

Language

This soft key brings up a selection box allowing selection from a list of built-in lan­guages for the MS2717A displays. The languages currently available are English,
French, German, Spanish, Japanese, Chinese, Korean, and Italian.

In addition, a custom language may be selected if it has been defined using the Master
Software Tools software and loaded into the MS2717A. T wo custom languages may be
loaded into the instrument using Master Software Tools. Select
change, or press the

Esc key to return to normal operation without changing anything.

Enter to accept the

Brightness

The brightness of the display can be adjusted to optimize viewing under a wide variety
of lighting conditions. Use the keypad, the Up/Down arrow keys or the rotary knob to
select a brightness level from 1 to 9, 9 being the brightest. Select

Enter to accept the

change.

Name

Opens a dialog box to name the instrument. The unit can be named using the keypad to
select numbers, the rotary knob to highlight a number or character and pressing the
knob to select, or by selecting the soft key for each letter. Use the

Shift key to select an

upper case letter. Use the Left/Right directional arrows to move the cursor position.
Press

Enter to save the name.

6-13

Volume

The current volume setting is displayed on the screen. Use the keypad, the Up/Down
arrow keys or the rotary knob to change the volume and press the

Enter key to accept

the change.

Reset

Opens a menu of reset and update options.

Factory Defaults

Restores the instrument to the factory default values, including Ethernet, language
and brightness settings. Press the
then on again to complete. Press

Enter key to initiate the reset, and turn the unit off,

Esc to return to normal operation without resetting.

Master Reset

This will restore factory setting to all system parameters, including Time/Date, Ether­net, language and brightness settings. Also, all user files in the internal memory are
deleted, and the original language and antenna files are restored.

Press the
plete. Press

Enter key to initiate the reset, and turn the unit off, then on again to com-

Esc to return to normal operation without resetting.

Update OS Via Ethernet

Select this soft key to update the instrument operating system via the Ethernet con­nection. Press Enter to begin the update, or press

Esc to return to normal operation

without updating.

Update OS Via USB

Select this soft key to update the instrument operating system via the USB connec­tion. Press Enter to begin the update, or press

Esc to return to normal operation with-

out updating.

NOTE: The Update OS via Ethernet and Update OS via USB selections
are accomplished in conjunction with the Master CodeLoader program,
supplied with the Master Software Tools suite. Improper use of the Master
CodeLoader program could render the system unusable.

Back

Returns to the previous menu.

6-14

WCDMA/HSDPA Measurements

NOTE: Use an applicable band pass filter to eliminate out of band signals
that can cause mixer saturation.

Carrier Frequency

Carrier Frequency is the selected transmitter operating center frequency entered by the user
or calculated from the signal standard and channel number entered by the user.

Carrier Feedthrough

Carrier Feedthrough measures the amount of unmodulated signal that is leaking through the
transmitter and is displayed in the Code Domain Power display. The WCDMA 3GPP speci­fication does not specify carrier feedthrough measurement.

CDP

Code Domain Power displays how much of the channel power is in each Orthogonal Vari­able Spreading Factor (OVSF). Power is normalized to the channel power, so if a code reads

-10dB, it means that the code is 1/10th of the channel power. Colors are applied according to
the following table:

Parameter Description Color VIewable on Display

CPICH Common Pilot Channel Red All CDP views

P-CCPCH

S-CCPCH

PICH Paging Indicator Channel Green All CDP views
P-SCH Primary Sync Channel Navy Blue Control Channels
S-SCH Secondary Sync Channel Blue Control Channels

Traffic WCDMA Traffic Yellow All CDP views
Noise Noise Grey All CDP views

Primary Common Control

Physical Channel

Secondary Common Control

Physical Channel

Magenta All CDP views

Cyan All CDP views

NOTE: In WCDMA specification the P-SCH and S-SCH are not assigned

spreading codes and therefore do not appear in the code domain power

display. They have special non-orthogonal scrambling codes and are on

10% of the time.

Channel Power

Channel power is the total power transmitted in the 3.8 MHz WCDMA channel specified.
Channel Power measures the node B/base station transmitting power across the entire 3.84
MHz WCDMA (UMTS) channel. Channel power is displayed in dBm and Watts.

6-15

Scrambling Code

In the WCDMA specification the scrambling code can be from 0 to 511. If the scrambling
code is known, its value can be entered and the test set can decode and display the code
domain power of the signal. If the scrambling code is unknown, the MS2717A can be set to
auto scrambling so that the test set can lock on to the strongest code to decode and display
the code domain power of the signal.

Spreading Factor (also called OVSF codes)

According to the 3GPP standard the spreading factor can be from 4 to 512, and the
MS2717A can be set to a maximum spreading factor of 256 or 512.

Freq Error

Frequency error is the difference between the received center frequency and the specified
center frequency. This is tied to the external frequency reference accuracy and is typically
only useful with a good external frequency reference.

Codogram

When Codogram is selected the screen displays the changes in code power levels over time.

Noise Floor

The average power of inactive codes in the code domain, displayed in the CDP measurement
display.

Threshold

The Active Channel Threshold Level can be set to indicate which code channels are consid­ered active. Any code channels exceeding this power level are considered active traffic
channels and any code channels below this power level are considered inactive (or noise). A
horizontal red line on the screen represents the threshold level. The MS2717A can set this
level automatically based on the received signal, or the user can manually enter a value in
the Threshold setup menu.

Occupied Bandwidth

The measured occupied bandwidth is calculated as the bandwidth containing 99% of the
total integrated power within the transmitted spectrum around the selected center frequency.

EVM (Error Vector Magnitude)

The Error Vector Magnitude is the ratio in percent of the difference between the reference
waveform and the measured waveform. EVM metrics are used to measure the modulation
quality of a transmitter. The 3GPP standard requires the EVM not to exceed 17.5%.

Symbol EVM (@EVM)

Symbol EVM is defined as the EVM for a single code channel.

Peak to Average Power

Peak to A verage power is the ratio of the peak power and the RMS power of the signal calcu­lated over one frame interval and is displayed in dB.

Peak CD Error (Peak Code Domain Error)

PCDE takes the noise and projects the maximum impact it will have on all OVSF codes.
PCDE is the maximum value for the code domain error for all codes (both active and inac­tive).

In the 3GPP standard to address the possibility of uneven error power distribution in
WCDMA, the EVM measurement has been supplemented with PCDE. The 3GPP standard
requires the PCDE not to exceed -33dB at a spreading factor of 256.

Ec

Ec is a measurement of energy. Ec is determined by multiplying CPICH by the chip time.

6-16

Ec/Io

The pilot power compared to the total channel power. Ec/Io is displayed in text only and
OTA measurement displays.

Pilot Dominance

The strength of the strongest pilot compared to the next strongest pilot in the same channel.
This should be >10 dB to make good measurements.

Total Power

The total power of all the scrambling codes, also called (Io) and displayed in dBm.

CPICH Abs Power

CPICH Abs power is the energy over one chip of the Common Pilot Channel power dis­played in dBm.

P-CCPCH Abs Power

P-CCPCH Abs power is the absolute Primary Common Control Physical Channel power
displayed in dBm.

S-CCPCH Abs Power

S-CCPCH Abs power is the absolute Secondary Common Control Physical Channel power
displayed in dBm.

P-SCH Abs Power

P-SCH Abs power is the absolute Primary Sync Channel power di sp layed in dBm.

S-SCH Abs Power

S-SCH Abs power is the absolute Secondary Sync Channel Power displayed in dBm.

PICH

PICH is the paging indicator channel power.

Constellation

In the HSDPA view, the symbol constellation for the selected code is displayed (16QAM or
QPSK).

Measurement Setup

Setting up the Measurement Frequency

The measurement frequency can be set by entering the center frequency or by selecting the
applicable signal standard and channel, which allows the MS2717A to automatically set the
frequency.

To enter the center frequency:
Step 1. Press the

Step 2. Press the
Step 3. Enter the desired frequency using the keypad, the arrow keys, or the rotary knob.

If entering a frequency using the keypad, the soft key labels change to

kHz and Hz. Select the appropriate units key. Selecting the Enter key has the same

affect as selecting the

Step 4. Press the

the left side of the display.

To select a signal standard:
Step 5. Press the

Step 6. Select the

Freq function hard key.

Center Freq soft key.

MHz soft key.

Enter key to set the Center Frequency. The current setting is shown on

Freq function hard key.

Signal Standard soft key.

GHz, MHz,

6-17

Step 7. Use the Up/Down arrow keys or the rotary knob to highlight a signal standard and

press

Enter to select. When a signal standard is selected, the center frequency for

the first channel of the selected standard is automatically tuned.

Step 8. Select the

Channel soft key and use the Up/Down arrow keys, the keypad, or the

rotary knob to select a channel number for the selected signal standard. The center
of the channel is tuned to the center of the display.

The current settings are displayed on the left side of the screen.

Power Offset for Compensating External Loss

T o get accurate results the external attenuation should be compensated using power offset. In
power offset mode the compensation factor is in dB. The external attenuation is caused by
using an external cable or external high power attenuator.

Step 1. Press the
Step 2. Press the

knob to enter the desired offset value. Press the

Amplitude function hard key.

Power Offset soft key and use the keypad, the arrow keys, or the rotary

Enter key to set the Power Offset.

The value entered is displayed on the left side of the screen.

Scrambling Code Setup

Scrambling codes can be set up a automatically or manually.
In Auto mode the unit automatically locks on to the strongest scrambling code in the signal.

In Manual mode the desired code is manually entered and the unit looks only for that spe­cific scrambling code.

To set up auto scrambling:
Step 1. Press the

Step 2. Press the

Setup function hard key.

Scrambling Code soft key to select Auto

To manually set up a Scrambling Code:
Step 3. Press the

Step 4. Press the

Setup function hard key.

Scrambling Code soft key to select Manual and use the keypad, the arrow

keys, or the rotary knob to enter the desired Scrambling Code, as shown on the left
side of the screen. Press the

Enter key to set the scrambling code.

Maximum Spreading Factor Setup

In a WCDMA system, the number of chips per data symbol is called the Spreading Factor.
The lower the spreading factor the higher the data rate. According to the 3GPP standard, the
spreading factor can vary from 4 to 512 and the maximum spreading factor is either 256 or

512. The MS2717A can be set to 256 or 512 maximum spreading factors. To set up the max­imum spreading factor:

Step 1. Press the
Step 2. Press the

6-18

Setup function hard key.

Max Spreading Factor soft key to select either 256 or 512.