Agilent E4406A cdmaOne Measurement Guide

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cdmaOne Measurement Guide

Agilent Technologies E4406A VSA Series

Transmitter Tester

Manufacturing Part Number: E4406-90100

Printed in USA

April 2000

The information contained in this document is subject to change without notice.

Agilent Technologiesmakesnowarrantyofanykindwithregard to this material, including but not limited to, the implied warranties of merchantability and ﬁtness for a particular purpose. Agilent Technologies shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.

Contents

1. Understanding cdmaOne

What Is the cdmaOne (IS-95) Communication System? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

What Does the E4406A VSA Series Transmitter Tester Do? . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Other Sources of Measurement Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Instrument Updates at www.agilent.com/ﬁnd/vsa . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2. Setting Up the cdmaOne Mode

cdmaOne Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

How to Make a Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Changing the Mode Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Changing the Frequency Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

cdmaOne Measurement Key Flow. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Installing Optional

Measurement Personalities. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Available Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

License Key Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Installing a License Key Number. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Using the Uninstall Key. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

3. Making cdmaOne Measurements

cdmaOne Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Preparing for Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Initial Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Measure Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Measurement Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Making the Channel Power Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Measurement Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Making the Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Results. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Changing the Measurement Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Changing the Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

Troubleshooting Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Making the Modulation Accuracy (Rho) Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Measurement Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Making the Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Results. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Changing the Measurement Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Changing the View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Changing the Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

Making the Code Domain Measurement

(Base Station Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Measurement Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Making the Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Results. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Changing the Measurement Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Contents

Changing the View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Changing the Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Making the Spur Close Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

Measurement Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

Making the Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

Changing the Measurement Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

Changing the View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

Making the Spectrum (Frequency Domain) Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Measurement Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Making the Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Changing the Measurement Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

Changing the View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

Using the Markers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

Troubleshooting Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

Making the Waveform (Time Domain) Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Measurement Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Making the Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

Changing the Measurement Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

Changing the View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74

Using the Markers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

Troubleshooting Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

Making the Adjacent Channel Power Ratio (ACPR) Measurement. . . . . . . . . . . . . . . . . . . . .77

Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

Measurement Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

Making the Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

Changing the Measurement Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81

Changing the View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83

Troubleshooting Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83

1 Understanding cdmaOne

Understanding cdmaOne

What Is the cdmaOne (IS-95) Communication System?

Code Division Multiple Access (CDMA) is a direct sequence spread-spectrum digital communications technique that was originally designed for military applications. The main advantages of CDMA over other types of communications schemes are:

• greater capacity than with other techniques

• immunity to signal loss and degradation in the presence of high broadband interference

• immunity to signal loss and degradation due to multipath, scatter, and fading

• power consumption of mobile stations is strictly minimized (by base station control)

• supports full 9600 baud capability for voice and data communications

• provides increased security

CDMA uses correlative codes to distinguish one user from another. Frequency division is still used, as is done with Frequency Division Multiple Access (FDMA) and Time Division Multiple Access (TDMA), but in a much larger bandwidth (1.25 MHz). CDMA uses a direct sequence spread spectrum technique that realizes increased capacity from 1:1 frequency reuse and sectored cells. The capacity limit is soft. That is, capacity can be increased with some degradation of the error rate or voice quality.

In cdmaOne, a single user's channel consists of a speciﬁc frequency combined with a unique code. Correlative codes allow each user to operate in the presence of substantial interference. The interference is the sum of all other users on the same cdmaOne frequency, both from within and without the home cell, and from delayed versions of these signals. It also includes the usual thermal noise and atmospheric disturbances. Delayed signals caused by multipath are separately received and combined in cdmaOne. One of the major differences in access is that any cdmaOne frequency can be used in all sectors of all cells. This is possible because cdmaOne is designed to decode the proper signal in the presence of high interference.

6 Chapter1

Understanding cdmaOne

What Is the cdmaOne (IS-95) Communication System?

The cdmaOne communication system is deﬁned in the following Electronics Industry Association (EIA) and Telecommunications Industry Association (TIA) documents:

TIA/EIA/ IS-95-A Mobile Station - Base Station Compatibility Standard

for Dual-Mode Wideband Spread Spectrum Cellular System

TIA/EIA-97-B Recommended Minimum Performance Standards for

Base StationsSupportingDual-ModeWideband Spread Spectrum Cellular Mobile Stations

TIA/EIA-98-B Recommended Minimum Performance Standards for

dual-Mode Wideband Spread Spectrum Cellular Mobile Stations

And the following American National Standards Institute (ANSI) documents:

J-STD-008 Personal Station-Base Station Compatibility

Requirements for 1.8to2.0GHzCode Division Multiple Access (CDMA) Personal Communications Systems

J-STD-018 Recommended Minimum Performance Requirements

for 1.8 to 2.0 GHz Code Division Multiple Access (CDMA) Personal Stations

J-STD-019 Recommended Minimum Performance Requirements

for Base Stations Supporting 1.8 to 2.0 GHz Code Division Multiple Access (CDMA) Personal Stations

Chapter 1 7

Understanding cdmaOne

What Does the Agilent Technologies E4406A VSA Series Transmitter Tester Do?

This instrument can help determine if a cdmaOne transmitter is working correctly. When conﬁgured for cdmaOne, the instrument can be used for the testing of a cdmaOne transmitter, according to the Electronics Industry Association and Telecommunications Industry Association TIA/EIA/IS-95A, TIA/EIA-97B, and TIA/EIA-98B documents and American National Standards Institute (ANSI) documents: J-STD-008, J-STD-018 and J-STD-019. These documents deﬁne complex, multi-part measurements used to maintain an interference-free environment. For example, the documents include measuring the power of a carrier. The E4406A automatically makes these measurements using the measurement methods and limits deﬁned in the standards. The detailed results displayed by the measurements allow you to analyze cdmaOne system performance. You may alter the measurement parameters for specialized analysis.

For infrastructure test, the instrument will test base station transmitters in a non-interfering manner by means of a coupler or power splitter.

This instrument makes the following measurements:

❏ Channel Power ❏ Modulation Accuracy (Rho) ❏ Spurious Close ❏ ACPR (Adjacent Channel Power Ratio) ❏ Code Domain - power, timing, and phase ❏ Spectrum (Frequency Domain) ❏ Waveform (Time Domain)

8 Chapter1

Understanding cdmaOne

Other Sources of Measurement Information

Additional measurement application information is available through your local Agilent Technologies sales and service ofﬁce. The following application notes treat digital communications measurements in much greater detail than discussed in this measurement guide.

• Application Note 1298 Digital Modulation in Communications Systems - An Introduction part number 5965-7160E

• Application Note 1311 Understanding CDMA Measurements for Base Stations and Their Components part number 5968-0953E

Instrument Updates at www.agilent.com/ﬁnd/vsa

This web location can be used to access the latest information about the transmitter tester.

Chapter 1 9

Understanding cdmaOne

Other Sources of Measurement Information

10 Chapter1

2 Setting Up the cdmaOne Mode

Setting Up the cdmaOne Mode

cdmaOne Mode

At initial power up, the transmitter tester will come up in the Basic mode, with the Spectrum (Frequency Domain) measurement selected and the

Measure menu displayed.

To access the cdmaOne measurement personality, press the and select the

cdmaOne key.

Mode key

If you want to set the cdmaOne mode to a known, factory default state, press Preset. This will preset the mode setup and all of the measurements to the factory default parameters.

NOTE Note that pressing the Preset key does not switch instrument modes.

You may want to install a new personality, reinstall a personality that you have previously uninstalled, or uninstall a personality option. Instructions can be found in “Installing and Uninstalling Optional Measurement Personalities” later in this section.

How to Make a Measurement

Follow the three-step process shown in the table below:

Step Primary Key Setup Keys Related Keys

1. Select & setup a mode

2. Select & setup a measurement

Mode Mode Setup, Input,

Frequency Channel

Measure Meas Setup Meas Control,

System

Restart

3. Select & setup view

View/Trace Span X Scale,

Amplitude Y Scale Next Window, Zoom

12 Chapter2

, Display,

File

, Save,

Print, Print Setup, Marker, Search

Setting Up the cdmaOne Mode

cdmaOne Mode

Changing the Mode Setup

Numerous settings can be changed at the mode level by pressing the

Mode Setup key. This will access a menu with the selections listed below.

These settings will affect all the measurements in the cdmaOne mode.

Radio

The

Radio key accesses a menu to select:

Band - Select IS-95A or J-STD-008.

•

Device - Select the device to test (base station or mobile station).

•

Radio Default Settings

Band IS-95A Device Base

Input

Input key accesses a menu to select the following: (You can also

The access this menu from the front-panel

Input Port - Choose between RF, I/Q, I Only, 50 MHz Ref, and IF Align.

•

RF Input Range - To set the RF input range, choose Auto or Manual. If

•

Auto is chosen, the instrument automatically sets the attenuator

Input key.)

based on the power level of the carrier (where it is tuned). If there are multiple carriers present, the total power might overdrive the front end. In this case you need to set the

RF Input Range to Manual

and enter the expected Max Total Pwr. Manual is also used if you want to hold the input attenuation constant (for the best relative power accuracy). For single carriers it is generally recommended to set the

RF Input Range to Auto. Max Total Pwr - To set the maximum total power at the UUT (Unit

• Under Test). This is the maximum expected value of the mean carrier power referenced to the output of the UUT (may include multiple carriers). The

Atten setting. If RF Input Range is set to Auto, and Max Total Pwr is

changed,

Input Atten - To set the input attenuator setting. The Input Atten

•

RF Input Range is switched to Manual.

Max Total Pwr setting is coupled to the Input

setting is coupled to the Max Total Pwr setting. The Input Atten key reads out the actual hardware value that will be used for the current measurement. If more than one input attenuator value is used in a single measurement, the value used at the carrier frequency will be displayed. If

RF Input Range is switched to Manual.

RF Input Range is set to Auto, and Input Atten is changed,

Chapter 2 13

Setting Up the cdmaOne Mode

cdmaOne Mode

NOTE The Max Total Pwr and Input Atten settings are coupled together. When

you switch to a different measurement, the constant, but the

Input Atten may change if the two measurements have

Max Total Pwr is kept

different mixer margins. Thus, you can directly set the transmitter tester input attenuation, or you can set it indirectly by specifying the maximum expected power at the UUT (Max Total Pwr setting).

•

Ext Atten - To enter the external attenuator setting for either a base

station or mobile station. This will allow the instrument to display the measurement results referred to the output of the UUT (Unit Under Test).

•

IF Align Signal - This key has effect only when Input Port is set to IF Align. When IF Align is activated, the RF path is switched to bring

in the same alignment signal that is automatically switched in to perform many alignments. This selection will allow manual adjustment of the alignment signal for diagnostic purposes:

—

Signal Rate - The signal is modulated by a digital sequence that

can be set to 1 of 13 positions (rate 0 through 12) to cause the comb spacing (or pulse timing) to widen or narrow. The key reports the comb spacing for a given rate (0 to 12) in “kHz”.

—

Signal Amptd - This is the DAC control that changes the

amplitude of the signal. It is a 12 bit (0 to 4095) DAC. A higher DAC number will raise the signal amplitude.

—

Signal Type - This can be Comb, CW (a tone that appears in the

center of the IF), or

Input Port RF RF Input Range Auto Max Total Power −15 dBm Input Atten 0 dBm Ext Atten Mobile 0.0 dB Ext Atten Base 0.0 dB

Pulse.

Input Default Settings

IF Align Signal Rate 0 (= 468.75 kHz) IF Align Signal Amptd DAC 500 IF Align Signal Type CW

14 Chapter2

Setting Up the cdmaOne Mode

cdmaOne Mode

Trigger

Trigger key accesses the mode setup menu for the following trigger

The source menus:

•

RF Burst

• Video (IF Envlp)

• Ext Front

• Ext Rear

Pressing one of the trigger source menu keys will access the trigger mode setup menu. This menu is used to set the

Delay, Level, and Slope

for each trigger source. Note that the actual trigger source is selected separately for each measurement (under the

Delay - For trigger delay use positive values. For pre-trigger use

Meas Setup key).

negative values.

Level - For the RF Burst selection, the level is relative to the peak

level of the RF signal. For the in dBm at the RF input, that will cause the trigger. For the

Video selection, the level is the value,

Ext Front

and Ext Rear selections, the level range is −5 to +5 volts.

Slope Pos Neg - Choose to trigger off of the leading edge (Pos) or the

trailing edge (

Other keys accessed under the

Trig Holdoff - sets the period of time before the next trigger can occur.

•

Auto Trig - acts as a trigger timeout. If no trigger occurs by the

•

Neg) of the burst.

Trigger key:

speciﬁed time, a trigger is automatically generated.

• Frame Timer - accesses the menu to manually control the frame timer:

Period - sets the period of the frame clock Offset - sets a one-time phase adjustment of the frame clock Reset Offset - resets the display of offset key to 0 Sync Source - selects the source used to sync the frame timer

Chapter 2 15

Setting Up the cdmaOne Mode

cdmaOne Mode

RF Burst

Delay Peak Level Slope

Video

Delay Level Slope

Ext Front

Delay Peak Level Slope

Ext Rear

Delay Peak Level Slope

Trigger Default Settings

0.000 s

−6.0 dB Pos

0.000 s

−6.0 dBm Pos

0.000 s

2.00 V Pos

0.000 s

2.00 V Pos

Trig Holdoff 0.000 s Auto Trig 100 ms Off Frame Timer Period 250.0000 µs Frame Timer Offset 0.000 s Frame Timer Sync Source Off

Demod

Sync Type - selects the type of synchronization used for the

• demodulation.

—

Even Sec - synchronizes to the internal frame timer that has been

synchronized to an even second clock input. The frame timer has a 26.6667 ms period. This input signal is connected to the rear-panel TRIGGER IN connector.

—

Pilot Seq - synchronizes to the pilot sequence on the RF channel.

As this does not provide an absolute time reference, the measured time offset value will not be valid.

—

Ext Front -directlysynchronizestoanexternalsignal connected to

the front-panel EXT TRIGGER INPUT connector.

— Ext Rear - directly synchronizes to an external signal connected to

the rear-panel TRIGGER IN connector.

— None

16 Chapter2

Setting Up the cdmaOne Mode

cdmaOne Mode

• PN Offset- Used to enter the PN offset of the base station being tested. This allows correct time offset values to be determined. This setting is not applicable when

RF Carrier - Select Single if there is a single RF carrier present at the

• RF Input. Select

Multi if there is more than one carrier present at the

Sync Type is set to Pilot Seq.

RF Input; which rejects the upper and lower adjacent channels for the modulation accuracy and code domain measurements.

Demod Default Settings

Sync Type Even Sec PN Offset 0 × 64[chips] RF Carrier Single

Changing the Frequency Channel

After selecting the desired mode setup, you will need to select the desired center frequency and PN offset. The selections made here will apply to all measurements in the mode. Press the key to access the following softkeys:

Center Freq - This is the current instrument center frequency. Use

• this key to input a frequency that corresponds to the desired RF channel to be measured.

•

PN Offset - Used to enter the PN offset of the base station being

tested. This allows correct time offset values to be determined as time offset is deﬁned relative to the PN offset. The range is

0 to 511 × 64[chips]. This setting is not applicable when Sync Type

is set to Pilot Seq. It is duplicated in Demod under Mode Setup key, for the modulation accuracy and code domain measurements.

Function Factory Default Setting

Center Frequency 1.00000 GHz PN Offset 0 × 64[chips]

Frequency Channel

Chapter 2 17

Setting Up the cdmaOne Mode

cdmaOne Measurement Key Flow

The key ﬂow diagrams, shown in a hierarchical manner on the following pages, will help the user to grasp the overall functional relationships for the front-panel keys and the softkeys displayed at the extreme right side of the screen. The diagrams are:

“Mode Setup / Frequency Channel Key Flow (1 of 2)” on page 19 “Channel Power Measurement Key Flow” on page 21 “Modulation Accuracy (Rho) Measurement Key Flow” on page 22 “Code Domain Measurement Key Flow” on page 23 “Spur Close Measurement Key Flow” on page 24 “Spectrum (Freq Domain) Measurement Key Flow (1 of 3)” on

page 25 “Waveform (Time Domain) Measurement Key Flow (1 of 2)” on

page 28

Meas Setup

EVM

Avg Number 10 On | Off

“ACPR Measurement Key Flow” on page 30

Use these ﬂow diagrams as follows:

• There are some basic conventions: An oval represents one of the front-panel keys. This box represents one of the softkeys displayed. This represents an explanatory description on its speciﬁc key. This box represents one of the default condition softkeys displayed.

Default conditions are shown as much as possible with underlined parameters or values displayed on those softkey labels.

• Follow the measurement diagram from left to right and top to bottom.

• A single softkey may allow multiple choices. For example; the softkey reveals two choices, BTS or MS. The underlined choice is the current state of the instrument. To change choices, press the softkey one time.

• When entering a numeric value of

Frequency, for example, use the

numeric keypad and terminate the entry with the appropriate unit selection from the softkeys displayed.

Device

• When entering a numeric value of numeric keypad and terminate with the

Slot (Std), for example, use the

Enter front-panel key.

• Instead of using the numeric keypad to enter a value, it may be easier to use the RPG knob or Up/Down keys.

18 Chapter2

Setting Up the cdmaOne Mode

cdmaOne Measurement Key Flow

Figure 2-1 Mode Setup / Frequency Channel Key Flow (1 of 2)

cdmaOneMode

Mode Setup

Radio

Band

IS-95A

J-STD-008

Device Base | Mobile

Input

Input Port

RF I/Q I only

50 MHz Ref

IF Align

RF Input Range Auto|Man Max Total Pwr -15.00 dBm Input Atten 0.00 dB Ext Atten

Mobile 0.00 dB

Base 0.00 dB

IF Align Signal

Signal Rate 0 =468.75kHz Signal Amptd DAC 500 Signal Type CW, Comb, Pulse

Trigger

RF Burst

Delay 0.000 s Peak Level -6.00 dB Slope Pos|Neg

Video (IF Envlp)

Delay 0.000 s Level -6.00 dBm Slope Pos|Neg

Ext Front

Delay 0.000 s Level 2.00 V

Slope Pos|Neg

Ext Rear

Delay 0.000 s Level 2.00 V Slope Pos|Neg

Trig Holdoff 0.000 s Auto Trig 100.0 ms On|Off

Frame Timer

Period 250.0000 us Offset 0.000 s Reset Offset Display Sync Source

Off RF Burst (Wideband) Ext Front Ext Rear

(a)

Chapter 2 19

Setting Up the cdmaOne Mode

cdmaOne Measurement Key Flow

Figure 2-2 Mode Setup / Frequency Channel Key Flow (2 of 2)

(a)

Demod

Sync Type

Even Sec Pilot Sec Ext Front Ext Rear

None PN Offset 0 X 64[chips] RF Carrier Single | Multi

Frequency Channel

Center Freq 1.00000 GHz PN Offset 0 X 64 [Chips]

20 Chapter2

Figure 2-3 Channel Power Measurement Key Flow

Setting Up the cdmaOne Mode

cdmaOne Measurement Key Flow

Measure

Channel Power

Meas Setup

Channel PowerMeasure Amplitude Y Scale

Avg Number 20 On | Off Avg Mode Exp | Repeat Integ BW 1.23000 MHz

Chan Power Span 2.00000 MHz

Restore Meas Defaults

Advanced

Sweep Time 68.27 usAuto | Man

Data Points 512 Auto | Man

Trig Source

Free Run (Immediate)

Video (IF Envlp)

RF Burst (Wideband) Ext Front Ext Rear

Scale/Div 10.00 dB Ref Value

Ref Position Top | Ctr | Bot

Scale CouplingOn | Off

Chapter 2 21

Setting Up the cdmaOne Mode

cdmaOne Measurement Key Flow

Figure 2-4 Modulation Accuracy (Rho) Measurement Key Flow

Measure

Mod Accuracy (Rho)

Meas Setup

Mod Accuracy (Rho)Measure View/Trace

Avg Frames 10 On|Off Avg Mode Exp|Repeat

Meas Intvl 1.250 ms

Spectrum Normal|Invert

Demod

Sync Type

Even Sec (Rear Trig In)

Pilot Seq Ext Front

Ext Rear

None

PN Offset 0 X 64 [Chips]

RF Carrier Single | Multiple

Restore Meas Defaults

I/Q Measured

Compl Vector

Compl Constln

Polar Vector

Polar Constln

Measure

I/Q Error (Quad View)

Mod Accuracy (Rho)

Display

I/Q Points Points / Chip Chip Dots On | Off

Span X Scale

Scale/Div 1.225 chip Ref Value 0.000 chip Ref Position Left |Ctr|Right Scale CouplingOn|Off

Amplitude Y Scale

Scale/Div

Ref Value

Ref Position Top |Ctr | Bot Scale Coupling On | Off

22 Chapter2

Figure 2-5 Code Domain Measurement Key Flow

Setting Up the cdmaOne Mode

cdmaOne Measurement Key Flow

Measure

Code Domain

Meas Setup

Code DomainMeasure View/Trace

Avg Frames 10 On | Off Avg Mode Exp|Repeat

Meas Intvl 1.250 ms

Meas Method

Power

Timing Phase

Active Set Th -20.00 dB

Spectrum Normal | Invert

Demod

Sync Type

Even Sec (Rear Trig In) Pilot Seq Ext Front Ext Rear

None

PN Offset 0 X 64 [chips]

RF Carrier Single | Multi

Restore Meas Defaults

Power Graph & Metrics Power Graph & Markers

Power Timing & Phase

Measure

Code Domain

Display

Code DomainMeasure

Marker

Points / Chip 2 | 4 | 8

Select 1 | 2 | 3 | 4 Normal Delta

Function

Band Power Noise Off

Trace

Power

Timing

Phase

Off

Shape

Diamond

Line

Square

Cross

Marker All Off

Chapter 2 23

Setting Up the cdmaOne Mode

cdmaOne Measurement Key Flow

Figure 2-6 Spur Close Measurement Key Flow

Measure

Spur Close

Meas Setup

Spur CloseMeasure

View/Trace

Spur CloseMeasure

Marker

Avg Number 15 On | Off

Avg Mode Exp| Repeat

Meas Type Examine |Full

Restore Meas Defaults

Lower Segment

Center Segment

Upper Segment

Select 1 | 2 | 3 | 4 Normal Delta

Function

Band Power Noise Off

Trace

Spectrum Upper Limit

Off

Shape

Diamond Line Square Cross

Marker All Off

24 Chapter2

Setting Up the cdmaOne Mode

cdmaOne Measurement Key Flow

Figure 2-7 Spectrum (Freq Domain) Measurement Key Flow (1 of 3)

Measure

Spectrum (Freq Domain)

Meas Setup

Span 1.00000 MHz Res BW 20.0000 kHz Auto|Man

Average

Trig Source

Restore Meas Defaults Advanced

Avg Number 25 On | Off Avg Mode Exp | Repeat

Avg Type

Pwr Avg (RMS)

Log-Pwr Avg (Video) Voltage Avg Maximum Minimum

Free Run (Immediate) Video (IF Envlp)

RF Burst (Wideband)

Ext Front

Ext Rear

Frame

Line

Pre-ADC BPF On | Off

Pre-FFT Fltr Gaussian | Flat Pre-FFT BW 1.55000 MHz Auto | Man FFT Window

Flat Top (High Amptd Acc)

Uniform Hanning Hamming Gaussian (Alpha 3.5)

Blackman Blackman-Harris

K-B 70 dB (Kaiser-Bessel)

K-B 90 dB (Kaiser-Bessel)

K-B 110 dB (Kaiser-Bessel)

FFT Size

Length Ctrl Auto | Man

Min Pnts/RBW 1.300000 Window Length 706

FFT Length 4096

(a)

Chapter 2 25

+ 58 hidden pages

Agilent E4406A cdmaOne Measurement Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

1 Understanding cdmaOne

What Is the cdmaOne (IS-95) Communication System?

What Does the Agilent Technologies E4406A VSA Series Transmitter Tester Do?

Other Sources of Measurement Information

2 Setting Up the cdmaOne Mode

cdmaOne Mode

How to Make a Measurement

Changing the Mode Setup

Changing the Frequency Channel

cdmaOne Measurement Key Flow