HP (Hewlett-Packard) E6380-90019 User Manual

Download

HP 8935 CDMA Cellular/PCS Bas e St ati o n

Main Menu

Test Set

Reference Guide

Firmware Version: A.01.00 and above

HP Part N u mber E6380- 90019

Revision A

Printed in U.S.A.

November 1997

Notice

Main Menu

Information contained in this document is subject to change without notice.

This material may be reproduced by or for the U.S. Government pursuant to the Copyright License under the clause at DFARS

52.227-7013 (APR 1988).

Contents

Main Menu

Product Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

In This Book. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Conventions Used in this Book. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

1. Getting Started

Before Connecting a Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Changing the Test Set’s Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Changing the Measurement Screen . . . . . . . . . . . . . . . . . . . . . . . . . 25

Changing the Control Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

How do I Verify that the Test Set is Operating Properly? . . . . . . . . . 31

Instrument Quick Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

2. Operating Overview

Displaying CDMA Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Channel Power, Rho, EVM, Average Power. . . . . . . . . . . . . . . . . . . 34

Code Domain Measurements (Power, Timing, Phase). . . . . . . . . . . 35

Displaying Analog Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

RF Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Displaying AF Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Displaying Analog Measurement Results on a Meter Scale . . . . . . 39

Using Channel Numbers to Set Analyzer and Generator Frequencies40

Calibrating the Channel Power Measurement . . . . . . . . . . . . . . . . . . 41

Changing the Increment or Decrement Setting. . . . . . . . . . . . . . . . . . 42

Specifying An Increment Value for the Arrow Keys or Knob . . . . . 42

Using the Factor of 10 Increment/Decrement Keys . . . . . . . . . . . . . 42

Using Measurement Limit Indicators . . . . . . . . . . . . . . . . . . . . . . . . . 43

Setting A Measurement Reference. . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Averaging Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

How the Test Set Averages Measurements . . . . . . . . . . . . . . . . . . . 46

Setting an RF Generator/Analyzer Offset . . . . . . . . . . . . . . . . . . . . . . 47

Saving and Recalling Instrument Se tups. . . . . . . . . . . . . . . . . . . . . . . 48

Memory Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Instrument Hardware Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Using USER Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Using Pre-Defined USER Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Assigning and Releasing USER Keys . . . . . . . . . . . . . . . . . . . . . . . . 52

Replacing Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

3. Overview of the Test Set’s Built-In Tools

Using RF Tools Program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Swept Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Discrete Freq Insertion Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Swept Insertion Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Swept Return Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Cable Fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Replot Data Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Contents

Main Menu

Transfer Stored Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

SA (spectrum analyzer) Self Calibration ON/OFF. . . . . . . . . . . . . . 65

Catalog PC (Memory) Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Set Up Printer/Data Collection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Using the Code Domain Analyzer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Selecting the Code Domain Analyzer’s Controls Menus . . . . . . . . . 67

Using the Spectrum Analyzer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Automatic Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Setting Resolution Bandwidth and Sweep Rate. . . . . . . . . . . . . . . . 68

Selecting the Spectrum Analyzer’s Controls Menus. . . . . . . . . . . . . 69

Using the Voltmeter and Audio Frequency Counter. . . . . . . . . . . . . . 70

Using the Oscilloscope (Scope) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Selecting the Oscillo sc op e’s Inp u t . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Selecting the Oscillo sc op e’s F ilte rs . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Triggering the Osc illo sc ope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Using the Oscilloscop e ’ s Mark er . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Using IB_UTIL Programs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

COPY_PL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

FILE_XFER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

RAM_USAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

Securing a Test Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Clearing RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Using the LISTOPTS (list options) Program. . . . . . . . . . . . . . . . . . . . 77

Using the DEMO Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Using the ST_PLT (store or plot) Program . . . . . . . . . . . . . . . . . . . . . 79

4. CDMA Measurements - Screens and Contr ol Fields

CDMA Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Average Power Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Channel Power Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Rho Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Error Vector Magnitude (EVM) Measurements . . . . . . . . . . . . . . . . 88

Code Domain Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Control Fields for CDMA Measurements. . . . . . . . . . . . . . . . . . . . . . . 93

ADCfs or ADC FS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Analyzer (CDMA analyzer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Analyzer (code domain analyzer). . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Anl Dir. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Anl Special . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Auto Zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Car FT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Chn Pwr Cal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

CW RF Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Data Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Data Source. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Even Sec In. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Contents

Main Menu

Freq Err. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Gain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Gen Dir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Gen Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Gen Special . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Input Atten . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Input Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Lvl . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Meas Intvl. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Num Avgs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Ofs Trnsfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Output Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

PN Offset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Pwr Gain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Pwr Intvl. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Pwr Scale. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Pwr Zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Qual Event . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

RF Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

RF Gen Freq . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

RF In/Ant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

Time Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

TmOfs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Trig Event. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Tune Freq . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Walsh Chan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

5. Analog Measurements - Screens and Contr ol Fields

Analog Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

AC Level Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

AM Depth Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

AF Freq Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

DC Level Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Distn (Distortion) Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

FM Deviation Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Frequency Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Frequency Error Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

TX Power Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

FM Deviation Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

AF Freq (Audio Frequency) Measurement . . . . . . . . . . . . . . . . . . . 121

SINAD Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

SNR Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

Control Fields for Analog Measurements. . . . . . . . . . . . . . . . . . . . . . 123

AF Anl In. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

AF Cnt Gate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

AFGen1 Freq. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

Contents

Main Menu

AFGen1 To . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124

AFGen2 Freq. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

AFGen2 To . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Atten Hold. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

Audio In Lo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Audio Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Auto/Norm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Auto Zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Center Freq. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Cont/Single . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

De-Emp Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

De-Emphasis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Detector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

Ext Load R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Filter 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

Filter 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

FM Coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Freq (marker) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133

Gain Cntl. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134

IF Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

Input Atten . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135

Input Gain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Input Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136

Internal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Level (div) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

Lvl (marker) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138

Marker To Peak+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Marker To Peak- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Marker To (spectrum analyzer). . . . . . . . . . . . . . . . . . . . . . . . . . . . 139

Mod In To . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

No Pk/Avg. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140

Normalize . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Notch Freq . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

Notch Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Offset Freq . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142

Output Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Pk Det To . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Port/Sweep . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144

Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145

Ref Level. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146

RF Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

RF Cnt Gate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147

RF Gen Freq . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

RF In/Ant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148

Scope To . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149

Sensitivity (RF analyzer). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Contents

Main Menu

Sensitivity (spectrum analyzer). . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Settling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

Span. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151

Speaker ALC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

Speaker Vol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

Squelch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Time/div . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Track/Fixed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154

Trig-Delay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

Tune Freq . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

TX Pwr Meas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156

TX Pwr Zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

Vert/div . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

Vert Offset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

6. Configuration - Screens and Control Fields

Configuring the Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Setting the Date and Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Changing the Beeper’s Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Turning Off User Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

Configuring for Printing A Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

Printing a Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161

Control Fields on the Configuration Screens. . . . . . . . . . . . . . . . . . . 162

Abort Print . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Antenna In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162

Base Freq (User Defined) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163

Beeper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

Chan Space (User Defined) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164

Data Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Date. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Display User Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165

Duplex Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

Ext Ref In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166

FF at End:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

FF at Start:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

Firmware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167

Flow Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168

Frame Clock Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

(Gen)-(Anl) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

(Gen)-(Anl) (User Defined). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

HP-IB Adrs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

IBASIC Echo. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

Inst Echo. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170

Lines/Page: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

Model: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

Notch Coupl . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

Opt CDMA TB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Contents

Main Menu

Parity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Printer Port: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Print Title:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172

Range Hold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

Ref Select. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

RF Chan Std. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175

RF Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

RF Gen Volts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

RF In/Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

RF Level Offset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

RF Offset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178

Save/Recall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179

Serial Baud . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Serial_9 In. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Serial No. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

Stop Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

Total RAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181

7. Connectors

Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

10 MHz REF OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

16 × CHIP CLOCK 19.6608 MHz OUT. . . . . . . . . . . . . . . . . . . . . . 184

ANALOG MODULATION IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184

ANT IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

AUDIO IN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186

AUDIO OUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

BASEBAND OUT (I and Q). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187

Chassis Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

CHIP CLOCK 1.2288 MHz OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

DATA IN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

DUPLEX OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188

EVEN SECOND SYNC IN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

EXT REF IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

EXT SCOPE TRIG IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189

FRAME CLOCK OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

HP-IB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

MEMORY CARD Slot. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

PARALLEL PORT 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

PARALLEL PORT 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

RF IN/OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

SCOPE MONITOR OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

SERIAL PORTs 9, 10, and 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193

TRIGGER QUALIFIER IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

VIDEO OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

8. Accessories, Manuals, Support

Modifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196

Contents

Main Menu

Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197

External Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197

Manuals (English and non-English) . . . . . . . . . . . . . . . . . . . . . . . . 197

Test Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198

HP Support for Your Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199

Getting Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199

Customer Training. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200

9. Error Me ss a ges

General Information About Error Messages . . . . . . . . . . . . . . . . . . . 204

Positive Numbered Error Messages . . . . . . . . . . . . . . . . . . . . . . . . 204

Negative Numbered Error Messages. . . . . . . . . . . . . . . . . . . . . . . . 205

IBASIC Error Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205

HP-IB Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

Text Only Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

The Message Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207

Non-Recoverable Firmware Error. . . . . . . . . . . . . . . . . . . . . . . . . . 207

Text Only Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208

Contents

Main Menu

Product In formation

Main Menu

Manufacturer’s

Main Menu

Declaration

This statement is provided to comply with the requirements of the German Sound Emission Directive, from 18 January 1991.

This product has a sound pressure emission (at the operator position) < 70 dB( A).

• Sound Pressure Lp < 70 dB(A).

• At Operator Position.

• Normal Operation.

• According to ISO 7779:1988/EN 27779:1991 (Type Test).

Herstellerbescheinigung

Diese Information steht im Zusammenhang mit den Anf orderungen der Maschinenlärminformationsverordnung vom 18 Januar 1991.

• Schalldruckpegel Lp < 70 dB(A).

• Am Arbeitsplatz.

• Normaler Betrieb.

• N ach I SO 7779:198 8/ E N 27779:19 91 (Typprüfu n g) .

Safety

Main Menu

Considerations

GENERAL This product and related documentation must be reviewed for

familiarization with safety markings and instructions before operation. This product has been designed and tested in accordance with IEC

Publication 1010, "Safety Requirements for Electronic Measuring Apparatus," and has been supplied in a safe condition. This instruction documentation contains information and warnings which must be followed by the user to ensure safe operation and to maintain the product in a safe condition.

SAFETY EARTH GROUND A uninterruptible safety earth ground must be provided from the main

power source to the product input wiring terminals, power cord, or supplied power cord set.

CHASSIS GROUND TERMINAL To prevent a potential shock hazard, always connect the chassis ground

terminal to earth ground when operating this instrument from a dc power source.

SAFETY S Y M BOLS Indicates instrument damage c an occur if indica ted operating l imits are

exceeded. Refer to the instructions in this guide. Indicates hazardous voltages. Indicates earth (ground) terminal

WARNING A WARNING note denotes a hazard. It calls attention to a

procedure, practice, or the like, which, if not correctly performed or adhered to, could result in personal injury. Do n ot proceed beyond a WARNING sign until the indicated conditions are fully understood and met.

CAUTION A CAUTION note denotes a hazard. It calls attention to an operation

procedure, practice, or the like, which, if not correctly performed or adhered to, could result in damage to or destruction of part or all of the product. Do not proceed beyond an CAUTION note until the indicated conditions are fully understood and met.

Safety Considerations for this Instrument

Main Menu

WARNING This product is a Safety Class I instrument (provided with a

protective earthing ground incorporated in the power cord). The mains plug shall only be inserted in a socket outlet provided with a protective earth contact. Any interruption of the protective conductor inside or outside of the product is likely to make the product dang erous. Intentional interruption is prohibited.

Do not expose to or operate this instrument in outdoor

atmospheric conditions such a s direct rain, hail, sleet, snow, icing, sunshine or wind. Op erate th is i nstrument onl y within its specified temperature humidity conditions.

This instrument is equipped with internal gr ound fault circuit

interrupter class A.

• This device does not protect against electrical shock due to contact with both circuit conductors or a fault in supply wiring to product.

• Do not use extension cord to connect this product to power receptacle. At tention-ne pas utiliser de ra llonge pour raccorder le detecteur-disjoncteur a la prise de courant.

• Replace cordset only with HP 8120 series. Attention Remplacer uniquement par un cordon amovible numero

8120.

• Do not use in wet location. Ne pas utilise r dans un emplacement mouille.

WARNING Whenever it is likely tha t the protection has been im paired, the

instrument must be made inoperative and be secured against any unintended operation.

If this instrument is to be energized via an autotransformer (for voltage reduction), make sure the common terminal is connected to the earth termina l of the power source.

If this product is not used as specified, the protection provided by t he equipm en t c o ul d b e i mpa i re d. Th is pr o d uc t m u s t b e u se d in a normal condition (in which all means for protection are intact) only.

No operator servi ceable parts in t his product. Refer servicing to qualified personnel. To prevent electrical shock, do not remove covers.

Servicing inst ructions are for use by qualified personnel only.

Main Menu

To avoid electrical shock, do not perform any servicing unless you are qualified to do so.

The opening of covers or removal of parts is likely to expose dangerous voltages. Disconnect the product from all voltage sources while it is being opened.

Adjustments described in the manual are performed with power supplied to the instrument while protective covers are removed. Energy available at many points may, if contacted, result in personal injury.

The power cord is connected to internal capacitors that my remain live for 5 seconds after disconnecting the plug from its power supply.

For Continued protection against fire hazard, replace the line fuse(s) only with 250 V fuse(s) or the same current rating and type (for example, normal blow or time delay). Do not use repaired fuses or short circuited fuseholders. FUSE: T 5.0A

CAUTION Always use the three-prong ac power cord supplied with this product.

Failure to ensure adequate earth grounding by not using this cord may cause personal injury and/or product damage.

This product is designed for use in Installation Category II and Pollution Degree 2 per IEC 1010 and IEC 664 respectively. For indoor use only.

This product has autoranging line voltage input, be sure the supply voltage is within the specified range.

Ventilation Requirements: When installing the product in a cabinet, the convection into and out of the product must not be restricted. The ambient temperature (outside the cabinet) must be less than the

maximum operating temperature of the product by 4° C for every 100 watts dissipated in the cabinet. If the total power dissipated in the cabinet is greater than 800 watts, then forced convection must be used.

To prevent electrical shock, disconnect instrument from mains (line) before cleaning. Use a dry cloth or one sl ightly d ampened with water to clean the external case parts. Do not attempt to clean internally.

Product Markings CE - the CE mark is a registered trademark of the European

Community. A CE mark accompanied by a year indicated the year the desi gn was pro ven.

CSA - the CSA mark is a registered trademark of the Canadian Standards Associatio n .

CERTIFICATION Hewlett-Packard Company certifi es that this p r oduct met its published

Main Menu

specifications at the time of shipment from the factory. Hewlett-Packard further certifies that its calibration measurements are traceable to the United States National Institute of Standards and

Technology, to the extent allowed by the Institute’s calibration facility, and to the calibration facilities of other International Standards Organization members.

WARRANTY This Hewlett-Packard instrume nt produc t i s warr anted a gainst d ef ec ts

in material and workmanship for a period of one year from date of shipment. During the warranty period, Hewlett- Packard Company will at its option, either repair or replace products which prove to be defective.

For warranty service or repair, this product must be returned to a service facility designated by HP. Buyer shall prepay shipping charges to HP and HP shall pay s hipping cha rges, duti es, and taxes for product s returned to HP from another country.

HP warrants that its software and firmware designated by HP for use with an instrument will execute its programming instructions when properly installed on that instrument. HP does not warrant that the operation of the instrument, or software, or firmware will be uninterrupted or error free.

LIMITATION OF WARRANTY

EXCLUSIVE REMEDIES

ASSISTANCE Product maintenance agreements and other customer assistance

The foreg o in g warranty shall not apply t o de fe ct s re su lting from improper or inadequate maintenance by Buyer, Buyer-supplied software or inte rfa cing, una uthor ized modification or misuse, operation outside of the enviro nmental sp ec ifications for the pro duct, or im proper site preparation or maintenance.

NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. HP SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE REMEDIES. HP SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER BASE ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.

agreements are available for Hewlett-Packard products. For any assistance, contact your nearest Hewlett-Packard Sales and Service Office.

Table 1 Regional Sales and Service Offices

Main Menu

Eastern USA Sales Office Hewlett-Packard Company 2101 Gather Rd. Rockville, MD 20850 Tel: (301) 258-2000

Southern USA Sales an d S ervice Hewlett-Packard Company 1995 North Park Place Atlanta, GA 30339 Sales Tel: (404) 955-1500 Fax: (404) 980-7292 Service Tel: (404) 850-2544 Fax: (404) 980-7292

Western USA Sales an d S ervice Hewlett-Packard Company 24 Inverness Place East Englewood, CO 80112 Sales Tel: (303) 649-5000 Fax: (303) 649-5787 Service Tel: (303) 649-5512 Fax: (303) 649-5787

Eastern USA Sales Office Hewlett-Packard Company 2101 Gather Rd. Rockville, MD 20850 Tel: (301) 258-2000

Southern USA Service Center Hewlett-Packard Company 930 E. Campbell Road Richardson, TX 75081 Tel: (214) 699-4331

Western USA Sales and Service Hewlett-Packard Company 1421 South Manhattan Avenue Fullerton, CA 92631 Sales Tel: (714) 999-6700 Fax: (714) 778-3033 Service Tel: (714) 758-5490 Fax: (714) 778-3033

Midwestern USA Sales and Service Hewlett-Packard Company 5201 Tollview Drive Rolling Meadows, IL 60008 Tel: (708) 342-2000

Western USA Service Center Hewlett-Packard Company 301 E. Evelyn Avenue Mountain View, CA 94041 Tel: (415) 694-2000 Fax: (415) 694-0601

United States of America Customer Information Center Hewlett-Packard Company Tel: (800) 752-0900 6:00 am to 5:00 pm Pacific Time Parts Direct: 1-800-227-8164

South Eastern Europe Sales an d S ervice Hewlett-Packard Ges. m.b.h. Liebigasse 1 P.O. Box 72 A-1222 Vienna, Austria Telephone: 43 222 2500 0 Telex: 13 4425

European Multicountry Region Sales and Service Hewlett-Packard S.A. P.O. Box 95 150, Route dv Nant_dl_AVRIL CH-1217 Meyrin 2 Geneva , Switzerland Telephone: (41/ 22) 780-8111 Fax: (41/22) 780-8542

Northern Euro pe Sales and Service Hewlet t-Packard Nederland B.V . Startbaan 16 1187 XR Amstelveen, The Ne therlands P.O. Box 667 Telephone: 31/20 5476911 X 6631 Fax: 31-20-6471825NL

Asia

Main Menu

Sales and Service Hewlett-Packard Asia Ltd. 22-30/F Peregrine Tower Lippo Center 89 Queensway, Central Hong Kong G.P.O. Box 863 Hong Kong Telephone: 852-848-7777 Fax: 852-868-4997

Japan Sales an d S ervice Yokogawa-Hewlett-Packard Ltd. 3-29-21, Takaido-Higashi Suginami-Ku, Tokyo 168 Telephone: 81 3 3331-6111 Fax: 81 3 3331-6631

International Sale s Bra nch Headquarters

Sales and Service Hewlett-Packard S.A. 39 Rue Veyrot P.O. Box 365 1217 Meyrin 1 Geneva , Sw i t z e rl a n d Telephone: 41-22-780-4111 Fax: 41-22-780-4770

Australia, New Zealand Sales and Service Hewlett-Packard Ltd. P.O. Box 221 31-41 Joseph Street Blackburn, Victoria 3130 Telephone: (61/ 3) 895-2895 Fax: (61/3) 898-9257

Canada Service Center Hewlett-Packard Ltd. 11120 178 Street Edmonton, Alberta T5S 1P2 Canada Telephone: (403) 486-6666 Fax: (403) 489-8764

Canada Sales an d S ervice Hewlett-Packard (Canada) Ltd. 5150 Spectrum Way Missi ssaug a , Ontari o L4W 5G1 Canada Telephone: (416) 206-4725 Fax: (416) 206-4739

Latin America Hewlett-Packard Company LAHQ Mexico City Col. Lomas de Virreyes 11000 Mexico D.F. Mexico Telephone: (52/5 ) 326-4000 Fax: (52/5) 202 7718

Canada Service Center Hewlett-Packard Company 17500 Transcanada Highway S. Serv Road Kirkland, Quebec H9J 2X8 Canada Telephone: (416) 206-3295

United Kingdom Sales and Service Hewlett-Packard Ltd. Cain Road Amen Corner Bracknell, Berkshire RG12 1HN United Kingdom Telephone: 44 344 360000

Product Description

Main Menu

The HP 8935 CDMA Cellular/PCS Base Station Test Set offers full signal gene ration and an alysis capab il ity and support for c el lular frequency bands and international PCS frequency bands.

You can perform the following CDMA measurements using the Test Set:

• Signal Quality Measurements

• Rho (ρ)

• Time Offset

• Frequency Error

• Carrier Feedthrough

• Code Domain Measurements

• Code Domain Power

• Code Domain Timing

• Code Domain Phase

• Average Power

• Channel Power

• Error Vector Magnitude The Test Set’s CDMA generator also has the following capabilities:

• Reverse Channel Source with Data Buffer

• AWGN (built-in calibrated E The Test Set also supports CDMA reference clocks and triggers. In addition to its CDMA measurements and capabilities, the Test Set

also provides the following analog measurements:

• AC Level

• A M De pth

• AF Frequency

•DC Level

• Distortion

• Frequency and Frequency Error

• Transmitter Power

• F M Deviatio n

• Audio Frequency

•SINAD

•SNR

b/No

levels)

In This Book

Main Menu

• Chapter 1, “Getting Started,” on page 23 familiarizes you with the front panel controls. It introduces the differ ent types of control fields that are used to make measurements

• Chapter 2, “Operating Overview,” on page 33 provides general information about how to change measurement screens and change control field settings. This chapter also provides some utility procedures: calibrating channel power, setting a reference, setting measurement limits, setting a generator/analyzer offset, averaging measurements, saving and recalling setups, and using USER keys.

• Chapter 3, “Overview of the Test Set’s Built-In Tools,” on page 55 introduces the RFTOOLS program. This program automates some measurements: cable fault location, swept return loss, swept and discrete insertion loss, spectrum analyzer self-calibration. The program also includes utilities for printing and data collection.

Basic operation of the built-in signal strength meter, spectrum analyzer, oscilloscope, and code domain analyzer is also included in this chapter.

• Chapter 4, “CDMA Measurements - Screens and Control Fields,” on

page 81 explains the measurements that can be made from these

screens and the fields that control the measurement’s parameters. CDMA measurements include average power measurements,

channel power measurements, rho measurements (including frequency error, time offset, and carrier feedthrough), EVM measurements (including phase error and magnitude error), and code domain measurements (including timing, phase, and power).

• Chapter 5, “Analog Measurements - Screens and Control Fields,” on

page 115 explains the measurements that can be made from these

screens and the fields that control the measurement’s parameters. Analog measurements include ac/dc level, AM depth, AF frequency,

distortion, frequency and frequency error, transmitter power, FM deviation, SINAD, and SNR.

• Chapter 6, “Configuration - Screens and Control Fields,” on page

159 explains the configuration controls for the Test Set.

• Chapter 7, “Connectors,” on page 183 describes the function and physical attributes of each connector on the Test Set.

• Chapter 8, “Accessories, Manuals, Support,” on page 195 describes any available upgrades, accessories, training and support for the Test Set.

• Chapter 9, “Error Messages,” on page 203 provides any available information about error recovery when messages are displayed.

Conventions Used in this Book

Main Menu

Screen names are shown as follows: CODE DOM. Keys are shown in the following typeface:

CDMA Gen. Shifted functions

(labeled in blue above the keys) are accessed by pressing and releasing the blue Shift key, and then the key below the blue label.

Fields and messages displayed on the CRT are shown in the following typeface: Input Atten.

The term “Test Set” is used to refer to the HP 8935. The screens shown in this manual may not exactly match the screens

displayed on the Test Set’ s CRT. Some di fferences may b e due to cont rol field settings, while other differences may be due to instrument revisions.

Which Document is Required?

Table 2 Document Navigation

Document Part Number Usage

CDMA Application Guide E6380-90016 Use this manual for basic CDMA measure ments and

AMPS Application Guide E6380-90017 Use this manual for making AMPS base station

The following documents are part of the HP 8935 document set. Use the table to help you decide which document you need.

for get ti n g sta rted with th e Te s t Se t.

measurements.

Reference Guide E6380-90019 Use this manual for screen and field descriptions and

general operation information about the Test Set.

Programmer’ s Guide E6380-90018 Use this manual to learn HP-IB syntax and for learning

how to program the Test Set.

Assembly Level Repair Guide

E6380-90015 Use this manual to perform calibration on the Test Set

and for general service information.

Main Menu

1 Getting St arted

Main Menu

• “Before Connecting a Radio” on page 24

• “Changing the Measurement Screen” on page 25

• “Changing the Control Fields” on page 26

• “Instrument Quick Check” on page 31

Getting Started

Main Menu

Before Connecting a Radio

NOTE The RF IN/OUT port should be used for all transmitter

tests when the radio is connected directly to the Test Set. (All UUT transmitter power measurements are made through this port). Off - the- air measur ement s can be made using the ANT IN port.

CAUTION Overpower Damage — Refer to the Test Set’s side panel

for maximum input power level at the RF IN/OUT, DUPLEX OUT, and ANT IN connectors. Exceeding these levels can cause permanent instrument damage.

24 Chapter 1

Changing the Test Set’s Display

Main Menu

Changing the Measurement Sc reen

The measurement screen is changed using the titlebar at the top of the screen and the cursor-control knob, using the GENERATOR/ANALYZER keys, or by using the UTILS keys. Rotate the knob to move the cursor from field to field or to change settings. Press the knob to make selecti ons (s ee “Changing the Control F ields” on

page 26 for more information about fields).

Figure 1-1 Using the cursor-control Knob or Screen Keys

Getting Started

Changing the Test Set’s Display

Titlebar

Push the knob to make a selection. Rota te the k n ob to move the cursor , or change settings.

USER

k1’

k2’

Pause/

Continue

k3’ k3

Ref Set Incr

10 k4’ k4

Lo Limit

Release k5

Push to Select

Shift

Out of Lock

Cancel

Volume Squelch

Meter Incr Set

Press one of the GENERATOR/ANALYZER or UTILS keys for a shortcut to the measurement or configuration screens.

CDMA Gen

RF Gen

Avg Incr x 10

Hi limit

GENERATOR/ ANALYZERSOFTWARE

DATA ENTRY

A EEX

Yes On/Off

CDMA Anl

AF Anl ScopeReset RF Anl

No ppm W

STATE

Code

Preset

Dom

Meas Reset

Spec

Hold

Anl

Save Recall

Enter

ADRS Local

dB GHz

dBm

UTILS

Prev MHz V

Printer

Config

Print s kHz mV

I/O

+/-

Config

Inst

Config

Error Hz

Message V

dBV

Help

To change the measurement screen

Step 1. Select the titlebar at the top of the screen (placement of the

titlebar may vary slightly on some screens).

Chapter 1 25

Step 2. Select the measurement screen from the list of choices.

Step 1. Press a screen key:

Spec Anl, AF Anl, Scope, Prev, Inst Config, Help, Pr i nter Config, I/O Config, Error Message.

CDMA Gen, CDMA Anl, Code Dom, RF Gen, RF Anl,

AF Anl, Scope, Printer Config, I/O Config, and Error Message are shifted functions (labeled in blue above a key). You must press and release the blue

Shift key then the key below the blue

label to access the screen (or other function) labeled in blue. Pressing the

Prev key displays the previous screen.

Getting Started

Main Menu

Changing the Test Set’s Display

Changing the Control Fie lds

There are several types of control fields in the Test Set. This section describes some of the different types of fields.

Unit-of -M easure Fi eld

Unit-of-measure can be changed to display measurements in different values or magnitudes. The unit-of-measure field can also be used to turn a measurement on or off (use the On/Off Yes key).

Figure 1-2 Unit-of-Measure Field

Unit-of-Measure

26 Chapter 1

To change a unit-of-measure field

Step 1. Position the cursor at the unit field on the display. Step 2. Press a key labeled with a different unit-of-measure

(such as W) . If the new units are valid, the measurement value is d isplayed

in the unit. If the new units are not valid, the message Invalid

keystroke. is displayed and the units are not changed.

Getting Started

Main Menu

Changing the Test Set’s Display

Underlined Entry Field

Underlined entry fields provide a choice of two settings (toggle).

Figur e 1- 3 Und erline d E n tr y F i el d

Underlined Entry Field

To Change an underlined entry

Step 1. Position the cursor at the field. Step 2. Push the cursor-control knob or the

underline under the desired choice. The underlined setting is immediately activated when

selected.

Enter key to move the

Chapter 1 27

Getting Started

Main Menu

Changing the Test Set’s Display

One-of-Many Field

One-of-many fields display a list of choices when selected.

Figure 1-4 One-of-Many Field

One-of-Many Field

Choices:

Chan Pwr Rho EVM Avg Pwr

To make a one-of-many choice

Step 1. Position the cursor at the field. Step 2. Push the cursor-control knob or the

Enter key to display the

choices.

Step 3. Move the cursor through the choices by turning the knob. Step 4. Push the cursor-control knob or the

Enter key to make the

choice. The choice is immediately activated when selected.

28 Chapter 1

Getting Started

Main Menu

Changing the Test Set’s Display

Numeric-Entry Fields

Values for numeric entry fields can be entered and changed using various methods, depending on your testing needs.

Figure 1-5 Nume ri c -Entr y Fi e l d

Numer ic E ntry Field

To change a value

Step 1. Position the cursor at the field. Step 2. Key in the desired number using the DATA ENTRY keys. Step 3. Press

Enter to select the choice.

Step 1. Position the cursor at the field. Step 2. Push the cursor-control knob (the flashing >> cursor appears) . Step 3. Turn the knob to increment or decrement the value. (The

current increment value may not be appropriate for your operation. See See “Changing the Increment or Decrement

Setting” on page 42.)

Step 4. Push the cursor-control knob or the

Enter key to select the

choice. OR

Step 1. Position the cursor at the field. Step 2. Push the cursor-control knob to highlight the desired choice.

Chapter 1 29

Step 3. Use the up-arrow or down-arrow keys to increment or

decrement the value.

Getting Started

Main Menu

Changing the Test Set’s Display

Decimal Valu e s

Decimal values are used for most numeric entry fields. The acceptable entries for decimal values are 0 through 9,, +/-, and EEX.

The

+/- key is used for entering negative numbers. EEX key is used to enter values in exponential notation. For

The example to enter 10-9 you would enter 1, 0, EEX (Shift, +/-), +/-, 9.

Hexadecimal Values

Hexadecimal (Hex) values are used for entering some signaling parameters. The acceptable entries values are 0 through 9 and A through F. No unit-of-measure is associated with these values.

Hexadecimal values are either entered from the keypad (A through F are shifted functions) or for some fields, values are selected from a list of choices.

30 Chapter 1

How do I Verify that the Test Set is Operating Properly?

Main Menu

How do I Verify that the Test Set is Operating Properly?

If your Test Set powers-up and dis pla ys the CDMA ANALYZER screen, but you suspect an instrument problem, use the Instrument Quick Check to verify operation of the basic instrument functions.

If no failure is indicated by this test, but you still suspect a problem,

refer to the “Performance Tests” information in the Assembl y L ev el Repair Manual.

Instrument Quick Check

Step 1. Set up the quick check:

a. Remove any connected cables ( excep t for AC or DC power). b. Turn instrument power on (if it is not already on).

Getting Started

c. Press d. Press e. Press

Preset. Inst Config and set the RF Display field to Freq. CDMA Anl and select the Avg Pwr field, then select Rho

from the Choices: menu.

f. Set the Tune Freq field to 800 MHz. g. Set the Anl Dir field to Rev h. Press

CDMA Gen and set the Output Port field to RF Out.

i. Set the RF Gen Freq field to 800 MHz. j. Set the Amplitude field to −40 dBm k. Set the Gen Dir. field to Fwd

displayed.)

Step 2. Check the following reading:

a. Rho should be greater than 0.96.

Step 3. Press

Spec Anl to access the SPEC ANL screen.

You should see the characteristic CDMA spectrum.

. (The EQ In/Out field is

Chapter 1 31

Getting Started

Main Menu

How do I Verify that the Test Set is Operating Properly?

Figure 1-6 CDMA Spectrum

32 Chapter 1

2Operating Overview

Main Menu

• "Displaying CDMA Measurements" on page 34

• "Displaying Analog Measurements" on page 36

• "Using Channel Numbers to Set Analyzer and Generator

Frequencies" on page 40

• "Calibrating the Channel Power Measurement" on page 41

• "Changing the Increment or Decrement Setting" on page 42

• "Using Measurement Limit Indicators" on page 43

• "Setting A Measurement Reference" on page 45

• "Averaging Measurements" on page 46

• "Setting an RF Generator/Analyzer Offset" on page 47

• "Saving and Recalling Instrument Setups" on page 48

• "Using USER Keys" on page 51

• "Replacing Batteries" on page 53

Ope rati ng Overvi ew

Main Menu

Displaying CDMA Measurements

Displayi ng CDMA Measure me nts

Channel Power, Rho, EVM, Average Power

You can select channel power, rho, EVM, or average power on the CDMA ANALYZER or CDMA GENERATOR screen as shown in

Figure 2-1.

For more information about these measurements see "CDMA

Measurements" on page 82.

Figure 2-1 Displaying Channel Po wer, Rho, EVM, or Average

Power

Choices:

Chan Pwr Rho EVM Avg Pwr

Time Offset, Frequen cy Erro r, Ca rrier Feedthrough

When you select Rho, the Time Offset, Frequency Error, and Carrier Feedthru measurements are displayed. Time offset and

carrier feedthrough are also displayed on the CODE DOM screen along with frequency offset.

Frequency Offset

Frequency offset is displayed on the CODE DOM screen.

Magnitude Error, Phase Error

When you select EVM, the Magnit ud e Err or and Ph as e Er ro r measurements are displayed.

34 Chapter 2

Operating Ov erview

Main Menu

Displaying CDMA Measurements

Code Domain Measurements (Power, Timing, Phase)

Code domain measurements are displayed on the CODE DOM screen. To select a code domain measurement, go to the CODE DOM screen and select a measurement from the Measurement field in the Main controls menu.

For more information about code domain measurements see "Code

Domain Measurements" on page 89.

Figure 2-2 Selecting Code Domain Measurements

Choices:

Power Fast Pwr Timing Phase

Chapter 2 35

Ope rati ng Overvi ew

Main Menu

Displaying Analog Measurements

Displayi ng An al og Meas ur e ments

RF Measurements

Frequency Error, Frequency

RF Frequency Error and RF Frequency are displayed on the RF ANALYZER, RF GENERATOR, and AF ANALYZER screens.

Figure 2-3 Displaying RF Frequency Error or RF Frequency,

and TX Power

Choices:

Freq Error Frequency

TX Power

Transmitter (TX)Power

TX Power is only measured and displayed here when the Input Po rt on the RF ANALYZER screen is set to RF In. If Ant (antenna) is selected, the measurement is replaced by four dashes (- - - -).

You can measure low power levels on the ANT IN port using the spectrum an a lyzer.

Refer to the "TX Power Measurement" field on page 120 and the "TX

Pwr Zero" field on page 157 for more information on measuring

transmitter po wer.

CAUTION Connecting a signal of >60 mW to the ANT IN (antenna)

port can cause instrument damage (although internal protection circuits can typically withstand a short-duration signal of 1 or 2 Watts). If the overpower circuit is triggered, remove the signal from the ANT IN port and turn the Test Set off and on to reset it.

36 Chapter 2

Displaying AF Measurements

Main Menu

FM Deviation, AM Depth, AC Level

The AF Anl In setting determines the AF analyzer’s input and the measurement displayed in the top-right corner of the measurement area (see figure 2-4). These measurements are displayed on the RF GENERATOR, RF ANALYZER, and AF ANALYZER screens.

Table 2-1 lists the measurement displayed for each AF Anl In setting.

Figure 2-4 Displaying FM Deviation, AM Depth, or AC Level

Choices:

FM Demod AM Demod SSB Demod Audio In Ext Mod FM Mod AM Mod

Operating Ov erview

Displaying Analog Measurements

Table 2-1 Measurements Selected with the AF Anl In field

Measurement AF Anl In Setting

FM Deviation FM Demod, FM Mod AM Depth AM Demod, AM Mod AC Level SSB Demod, Audio In, Ext Mod, Audio Out

Chapter 2 37

Ope rati ng Overvi ew

Main Menu

Displaying Analog Measurements

SINAD, Distortion, SNR, AF Frequency, DC Level,

These measurements are available on the RF GENERATOR, RF ANAL YZER, and AF ANALYZER screens. See figure 2 -5 .

Figure 2-5 Displaying SINAD, Distortion, SNR, DC Level, or

AF Frequency

Choices:

SINAD Distn SNR AF Freq DC Level

The Distortion measurement is only for a 1 kHz tone. Selecting SNR (Signal/Noise Ratio) turns off any other audio

measurement. For more information on making this measurement, see the RF Gen Freq field description, on page 148.

38 Chapter 2

Operating Ov erview

Main Menu

Displaying Analog Measurements

Displaying Analog Measurement Results on a Meter Scale

Figure 2-6 Displaying the Meter Scale

Unit-o f -Measure

Fields

Meters:

On/Off Lo End Hi End Intervals

Measurement results can be displayed on a meter scale. The digital numeric value is still displayed (but smaller) under the meter scale.

To display the meter scale

Step 1. Move the cursor to the unit-of-measure field for the

measurement you want displayed on the meter.

Step 2. Press and release the blue Shift key, then the Incr Set key to

access the meter function.

Step 3. Select On/Off from the Meters: menu (or press the

On/Off key ).

To set the meter’s end points and scale intervals

Step 1. Use the knob to select the unit-of-measure field for the

measurement you want displayed on the meter.

Step 2. Press and release the blue

Shift key, then the Incr Set key to

access the meter function.

Step 3. Select Hi End, Lo End, or Interval from the Meters: menu

and enter the value for your selection, then press the

Enter key.

Step 4. Repeat steps 2 and 3 until you have set the desired

parameters for the meter’s scale.

Chapter 2 39

Ope rati ng Overvi ew

Main Menu

Using Cha nn el Num bers to Set Analyzer and Generat o r Frequencies

Using Chann el Numbers t o Set Analyz er and Gene rator Frequencies

RF analyzer and RF generator frequencies can be entered by channel number (the default setting) or by discrete frequencies (in MHz). The RF Disp la y fie ld on the INSTRUMENT CONFIGURE screen controls which way frequencies are entered. This screen is accessed by pressing the

Inst Config key.

If the RF Disp lay field is set to Chan to set the RF Chan Std field to indicate the standard for your base station (such as North American PCS). This automatically sets the correct frequency of f set needed to ge nerate r ev erse c ha nnel si gna ls a nd analyze forward channel signals for base stations.

If you do not know the channel number of your base station, but know the transmit and r eceive frequenc ies, s et the RF Display field to Freq You can then enter these frequencies directly for the RF generator and RF analyzer during tests.

Figure 2-7 Con figuration to Use Channel Numbers for RF

Set the RF Display field to Chan to turn on channel tuning.

Select the RF Chan Std field to

display a list of system types.....

for channel tuning, you also need

Generator and Analyzer Settings

..and then sel ec t the channel standard for testing your base stations.

40 Chapter 2

Operating Ov erview

Main Menu

Calibrating the Channel Power Measuremen t

Calibrati ng th e Cha nne l Power Meas ure me nt

To calibrate a channel power measurement at the RF IN/OUT port using the internal CDMA generator

Step 1. Go to the CDMA ANALYZER s creen and choos e the Chan Pwr

measurement.

Step 2. Set the Tune Freq field (or RF Channel field) to the center

frequency of your CDMA signal.

Step 3. Select the C hn Pw r Ca l field and wait until the calibration is

complete.

Chapter 2 41

Ope rati ng Overvi ew

Main Menu

Changing the Increment or Decrement Setting

Changing the Increment or D ecrement Setting

Specifying An Increment Value for the Arrow Keys or Knob

The Incr Set key is used to assign a specific increment value. The increment value may use different units than the field you are

incrementing/decrementing. For instance; if the RF generator’s Amplitude setti n g is disp layed in dB µV, you could increment in units of dB or mV.

To change the increm en t/decrem ent value

Step 1. Move the cursor to the numeric entry field to be changed. Step 2. Press

unit-of-measure using the DATA ENTRY keys.

Step 3. Use the down-ar ro w an d up-arrow ke ys or cursor

control knob to increment the field’s value. The field’s value changes by the value you set for each key press or knob click.

Incr Set, and enter the desired incremental value and

Using the Factor of 1 0 Inc rement/Decrement Keys

The Incr × 10 and Incr ÷ 10 keys change the increment/decrement value by a factor of 10.

For example, if you set the increment for Tune Freq to 10 MHz for every click of the knob or push of the down-arrow or up-arrow keys, pushing

Incr ×10 changes the increment value to 100 MHz.

42 Chapter 2

Using Measurement Li m it In di c at or s

Main Menu

Using Measurement Limit Indicators

The Lo Limi t and Hi Limit functions are used to define a measurement

“window.” You can set a high limit, a low limit, or both. When limits are assigned, Lo, Hi or both are indicated on the screen.

A measurement that goes above or below the defined limits causes three things to happen:

1. A message appears at the top of the screen indicating a limit was exceeded.

2. The Lo or Hi indicator flashes.

3. The beeper beeps (if it is has been enabled in the INSTRUMENT CONFIGURE screen).

Limits are helpful when you can’t watch the Test Set’s display while you are making an adjustment on the equipment you are testing or repairing. They are also a convenient way of alerting you to long-term measurement drift.

Operating Ov erview

To set high and low limits

Step 1. Position the cursor in front of the unit-of-measure for the

measurement for which you are setting limits.

Step 2. Press and release the

Shift key, then the down-arrow key to

access the Lo Limit function, and enter the measurement’s low-limit value and its unit-of-measure.

Step 3. Press and release the Shift key, then the up-arrow key to access

the

Hi Limit function, and enter the measurement’s high-limit

value and its unit-of-measure.

Chapter 2 43

1. The fundamental unit for the limits does not have to be the same as the mea-

surement’s units. For instance; when measuring AC Level in Volts, you can set high and low limits in units of dBm.

Ope rati ng Overvi ew

Main Menu

Using Measurement Limit Indicators

To reset or remove limits

To reset a limit that has been exceeded

Step 1. Position the cursor in front of the measurement’s

unit-of-measure.

Step 2. Press and release the

Shift key, then the down-arrow (or

up-arrow key) to access the Lo Limit (or Hi Limit) function.

Step 3. Press

Enter or Shift then Hold to access the Meas Reset function.

To remove a limit

Step 1. Position the cursor in front of the unit-of-measure for the

assigned limit.

Step 2. Press and release the

Shift key, then the down-arrow (or

up-arrow key) to access the Lo Limit (or Hi Limit) function, then press the On/Off key.

44 Chapter 2

Setting A Measurement Reference

Main Menu

The reference set (Ref Set) function establishes a measurement reference point. This allows you to make a direct comparison between two measurement results, or between a measurement standard and the actual measurement results.

Depending on the type of measurement, referenced measurements are displayed in one of two ways:

1. Displayed val u e = Measurement − Reference. The difference between the measured value and the reference value is displayed.

2. Displayed value = Measurement ÷ Reference. A ratio of the measured value to the reference value is displayed. This ratio is expressed in dB.

To set a reference

Operating Ov erview

Setting A Measurement Reference

Step 1. Position the cursor in front of the unit-of-measure for the

measurement you want to set the reference for.

Step 2. Press and release the

Shift key, then the Incr ÷10 key to access

the Ref Set function.

Step 3. Enter a reference value, then press

Enter. (To use the currently

measured value as a reference, just press Enter.)

Step 4. The Reference indicator shows that an internal reference has

been set.

Step 5. To turn the reference off press and release the

Shift key, then

the Incr ÷10 key to access the Re f Set functi on, and then press the

On/Off key .

Chapter 2 45

Ope rati ng Overvi ew

Main Menu

Averaging Measuremen ts

Averaging Measurements

The Avg (average) function allows you to display the average value of a number of measurements. You enter the number of measurement samples used to calculate and display the measurement average. This dampens the effects of rapidly changing measurements, providing a more usable measurement display.

To use measurement averaging

Step 1. Position the cursor in front of the measurement’s

unit-of-measure.

Step 2. Press and release the

Shift key, then the Incr ×10 key to access

the Avg function.

Step 3. Enter the d esir ed number of meas ure ment samples to be used

for calculating the average, then press the knob or the key.

or Press

On/Off to use the currently-displayed number of samples.

Step 4. To turn averaging off, position the cursor in front of the

unit-of-measure and press and release the

Incr ×10 key to access the Avg function, then press the On/Off key.

How the Test Set Averages Measurements

When the averaging function is first enabled, a numeric average is calculated and displayed each time a measurement is made. This continues until the specified number of samples is reached. From that point on, the averaging function performs an exponential filtering operation that mimics an RC filter.

Because of the exponential response, any large measurement changes result in a displayed value that ramps up or down to the actual measured value.

Enter

Shift key, then the

46 Chapter 2

A measurement reset clears the measurement history for all measurements and starts the averaging process over. (Press and release the

Shift key then the Hold key (Meas Reset) to reset the

measurement.)

Setting an RF Generator/Analyzer Offset

Main Menu

Setting an R F Gener at or/ An aly ze r Offs et

You can set a fixed frequency offset between the RF generator and the RF analyzer. This feature is convenient for testing radios with a fixed transmit/receive frequency offset.

To set an R F Offset

Step 1. Go to the INSTRUMENT CONFIGURE screen.

Operating Ov erview

Step 2. Set the RF Display field to Freq Step 3. Set the RF Offset field to On. Step 4. Select the (Gen)-(Anl) field and enter the frequency offset

value.

Step 5. Go to the RF GENERATOR screen. Step 6. Select the RF Gen Freq field, and rotate the cursor control

knob to vary the RF generator’s frequency.

Step 7. Go to the RF ANALYZER screen. Notice that the Tune Freq

value changes to maintain the offset between the generator and the analyzer. (You can use the the generator and analyzer screens.)

Prev key to switch between

Chapter 2 47

Ope rati ng Overvi ew

Main Menu

Saving and Recalling Instrument Setups

Saving and Re cal li ng In st ru ment Se t up s

The save and recall functions allow you to store different instrument setups and retrieve them later, eliminating the task of re-configuring the Test Set.

The number of available save registers depends on how many changes were made to the base instrument setup for each save. (See "BASE

Settings" on page 50.) The smaller the number of changes, the greater

the number of save registers that can be used (typically over 200). Save/Recall register settings can be saved to internal RAM or to a PC

card. Saving registers to a PC card allows you to “back up” the settings in case you need to clear them from memory for running large programs, or when a firmware upgrade is performed (see "Memory

Considerations" on page 50).

To save an instrument setup

Step 1. Go to the I/O CONFIGURE screen. Step 2. Select the storage media using the Save/Recall field. (The

default is internal memory.)

Step 3. Make any changes to the instrument that you want to save in

a register.

Step 4. Press and release the

Save function.

Shift key then the Recall key to access the

Step 5. Use the DATA ENTRY keys or the Save: m enu to enter the

To recall an instrument setup

Step 1. Select the I/O CONFIGURE screen. Step 2. Select the media to recall settings from using the

Save/Recall field. The default is internal memory.

Step 3. Press Recall. Step 4. Use the knob to select the d esired setup to b e recalled f rom the

Recall menu.

48 Chapter 2

Operating Ov erview

Main Menu

Saving and Recalling Instrument Setups

To remove (clear) an individual save register

Step 1. Specify where the register is stored using the Save/Recall

field on the I/O CONFIGURE screen.

Step 2. Press Step 3. Use the knob to position the cursor in front of the register to

Step 4. Press

Step 5. Press

To clear all save registers

Step 1. Press Step 2. Use the knob to position the cursor in front of the *Clr All*

Step 3. Press the knob or press

Step 4. Press

Register Name s

Recall.

be removed from the Recall menu at the bottom-right of the screen. The reg ister name and percentage of memory occupied by that register are indicated at the top of the screen.

Yes On/Off. A prompt appears, asking i f you want to delete

the save register.

Yes On/Off.

Recall.

entry in the Recall menu at the bottom-right of the screen.

Enter. A prompt appears at the top of

the screen to verify that you want to clear all registers.

Yes On/Off.

You can use any number, letter, or combination of numbers and letters as a name for storing instrument settings. For instance; if you want to

save a setup for testing a “Vulcan7” radio, you can save the setting as “VULCAN7”.

Two register names are reserved for special purposes: POWERON and BASE.

POWERON S ettings

When the Test Set is turned on, it uses a set of instrument setup parameters specified at the time of manufacture. You can have the instrument power up in a different state by making the desired changes to the original settings, and then saving them using the name POWERON.

The next time the instrument is turned on, the instrument returns to the state present wh en y ou s a ved the POWERON setting. For ins ta nce; if the SCOPE screen was displayed when POWERON was saved, it is the screen that is displayed when you turn the instrument on.

Chapter 2 49

Ope rati ng Overvi ew

Main Menu

Saving and Recalling Instrument Setups

BASE Settings

The BASE register contains any field settings the user has saved that are different from the instrument preset state. It establishes a reference point for all future saves. If a base is not saved, the preset state is used as the reference.

When you save an instrument setup, the new setup is compared to the base settings, and any differences are stored under the register name you supply. Because only differences are stored, a much larger number of instrument setups can be saved than if the contents of every field was saved.

When you recall an instrument setting, every field is reset to the base settings. The saved settings are then used to re-establish the desired instrument setup.

You can define your own base setting. If your desired settings are very different from the preset values, you may want to change the BASE register. This will decrease the amount of memory used to save each setup, and allow you to save many more setups.

CAUTION Since each save/recall register only contains the

differences between the setup being saved a nd the present base register settings, changing the base settings causes all other saved setups to be erased from memory (including the POWERON setting if one has been saved). Unless you consistently change the same fields to the same value each time you use the instrument, you should avoid creating your own BASE settings.

Memory Conside r atio ns

When the Save/Recall field of the I/O CONFIGURE screen is set to Internal, programs are saved to the same non-volatile RAM used to

create RAM disk(s) and run IBASIC programs. By saving a large number of instrument setups, you red uce t he amount of RAM availa ble

to run programs. If you get a “memory overflow” message while trying to load a program, you must clear one or more save/recall registers to free RAM space.

Instrument Hardware Changes

Recalling a saved register that uses a hardware option that has been removed results in unspecified operation. Re-install the needed option before atte mpting to recall the asso ciated regi st e r(s).

50 Chapter 2

Using USER Keys

Main Menu

You can use user keys to move quickly between fields on the same screen, and to access fields that are not normally available on the screen you are using.

Local user keys are used to move between settings on the sc re en tha t is displayed. Five local user keys are avai lable for eac h screen: and k5 . When the user key is pressed, the cursor instantly moves to, a nd selects, the assigned field; eliminating the need to turn and push the knob. Using these keys removes any other local user keys you may have set up.

Global user keys are used to access settings that are not available on the current screen. Three global user keys are available: (Use the Shift key to access the global user keys)

Using Pre-Defined USER Keys

Operating Ov erview

Using USER Keys

k1, k2, k3, k4,

k1’, k2’, an d k3’.

To Use the Pre-Assigned Local USER Keys

Step 1. Press and release the

Shift key, the k4 key; then the Enter key.

The numbers 1 through 5 appear in front of various fields. (See figure 2-8.)

Step 2. Press the USER keys (

k1 to k5) and notice how the cursor

immediately moves to the corresponding field.

Step 3. To stop using the default user keys, press and release the

key, then the k5 key to access the Release function; then press the Enter key.

Figure 2-8 An Example of Pre-Assigned Local User Keys

USER

k1’ k1 k2’ k2 k3’ k3

Assign

Release

Shift

Chapter 2 51

Ope rati ng Overvi ew

Main Menu

Using USER Keys

Assigning and Releasing USER Keys

When defining user keys, the Assign function is used to create key definitions; the user key to a different field automatically releases it from its previous setting.

To assign local user keys

Step 1. Move the cursor to the field that you want to assign to a local

user key.

Release function removes the definitions. Re-assigning a

Step 2. Press and release the

Assign function. Then press a USER key (k1-k5). The user key

Shift key, then the k4 key to access the

number appears in front of the field you assigned it to. (Since the cursor is at the newly assigned field, the USER key number is hidden until the cursor is moved.)

To release local user keys

Step 1. Display the screen containing the user key assignment to be

removed.

Step 2. Press and release the

Release function; then press the USER key (k1-k5).

Shift key, then the k5 key to access the

To assign global user keys

Step 1. Move the cursor to the field you want to assign a g lobal USER

key to.

Step 2. Press and release the

Assign function. Then press Shift and a USER key (k1’- k3’).

Shift key, then the k4 key to access the

Unlike a local user key, the user key number does not appear at this field; instead, a prompt appears at the top of the screen confirming the key assignment.

52 Chapter 2

To release global user keys

Step 1. Move the cursor to the field with the global user key assigned

to it.

Step 2. Press and release the

Release function. Then press Shift and the user key to be

Shift key, then the k5 key to access the

released.

Replacing Batteries

Main Menu

There are two methods by which the Test Set backs up its RAM. One is a set of two AA batteries mounted behind the rear panel of the Test Set. You must periodically change these batteries. The second method of RAM backup is an internal battery. It is not user serviceable.

CAUTION Failure to take prompt action may result in loss of RAM

NOTE Do not use rechargeable batteries.

To change the AA batteries, use the following procedure:

1. Turn off power and unplug the Test Set.

2. Remove the six screws in the rear panel using a TX-15 TORX (R) screwdriver.

Operating Ov erview

Replacing Batteries

data including IBASIC programs and SAVE / RECALL states stored in the RAM.

3. Remove the rear cover.

4. Replace the AA batteries.

5. Replace and reconnect the rear panel. Dispose of used batteries properly.

Chapter 2 53

Ope rati ng Overvi ew

Main Menu

Replacing Batteries

54 Chapter 2

3 Overview of the Test Set’ s

Main Menu

Built-In Tools

• "Using RF Tools Program" on page 56

• "Using the Code Domain Analyzer" on page 67

• "Using the Spectrum Analyzer" on page 68

• "Using the Voltmeter and Audio Frequency Counter" on page 70

• "Using the Oscilloscope (Scope)" on page 71

• "Securing a Test Procedure" on page 75

• "Clearing RAM" on page 76

• "Using the LISTOPTS (list options) Program" on page 77

• "Using the DEMO Program" on page 78

• "Using the ST_PLT (store or plot) Program" on page 79

Overview of the Test Set’s Built-In Tools

Main Menu

Using RF T ool s Pr ogram

Using RF Tools Program

The RF Tools Program resides in the Test Set’s ROM. The following tests and utility programs are available in this program.

See Figure 3-1 on page 57 for instructions on loading the RFTOOLS program.

To run the tests or utilities in the RFTOOLS program:

1. Choose the test or utility you want to run from the list of choices.

2. Fill in the parameters that are displayed for each test. The following tests and utility programs are available in this program.

• "Swept Gain" on page 58

• "Discrete Freq Insertion Loss" on page 59

• "Swept Insertion Loss" on page 59

• "Swept Return Loss" on page 60

• "Cable Fault" on page 62

• "Replot Data Files" on page 65

• "Transfer Stored Data" on page 65

• "SA (spectrum analyzer) Self Calibration ON/OFF" on page 65

• "Catalog PC (Memory) Card" on page 66

• "Set Up Printer/Data Collection" on page 66

56 Chapter 3

Figure 3-1 Loading and Running RF Tools

Main Menu

Overview of the Test Set’s Built-In Tools

Using RF Tools Program

Press Menu to display the Software Menu

screen.

Position the c ursor at ROM and select it .

3 4

Posi ti on th e cursor at Select Procedure

Location: and select it.

Posi ti on th e cursor at Select Procedure Filename: and select it.

ROM

Position the c ursor at Choices: and

select RFTOOLS.

RFTOOLS XXXXXX YYYYYY

Position the cursor at Run Test and

select it. The Software is now loading.

Loading Time: Firs t ti m e : approximately three m i nutes.

After first time: approximately 15 seconds.

Chapter 3 57

Overview of the Test Set’s Built-In Tools

Main Menu

Using RF T ool s Pr ogram

Swept Gain

This test measures the gain of a device by sweeping it over the specified frequency range. In the menu for this test, you can enter the frequency range over which the devi ce is to be swept, the level into the device from the DUPLEX OUT port, and the maximum expected gain.

This test requires tw o 6-dB pads (a ttenua tor s ). The pads a re put on t he

Test Set’s ANT IN and DUPLEX OUT ports to reduce impedance mismatch error at these ports. A reference level is obtained by connecting a short calibration cable between the pads on the DUPLEX OUT and ANT IN ports. Next, the test device is added between the calibration cable and one of the pads, and a measurement is made of the additional gain from the reference level. The trace of the device gain over the frequency range swept is d i s played . The maximum gain is also displayed on the screen.

58 Chapter 3

Overview of the Test Set’s Built-In Tools

Main Menu

Using RF Tools Program

Discrete Freq Insertion Loss

This test measures the loss of a ca bl e or device a t a specif i ed freq uenc y. This test is the most accurate method for measuring insertion loss. In the menu for this test, you can enter the discrete frequency and signal level at which the measurement will be made.

This test requires two 6-dB pads. The pads are put on the ANT IN and DUPLEX OUT ports on the Test Set to reduce impedance mismatch error at these ports. A reference level is obtained by connecting a short calibration cable between the pads on the DUPLEX OUT and ANT IN ports. Next, the test cable or device is added between the calibration cable and one of the pads, and a measurement is made of the addition loss from the reference level. The insertion loss at the specified frequency is displayed on the screen.

NOTE The insertion loss at the specified frequency is displayed twice. The

second disp la y is en la rged for easier reading.

Swept Insertion Loss

This test measures the loss of a cable or device by sweeping it over the specified frequency range. In the menu for this test, you can enter the frequency range over which the cable is to be swept.

This test requires two 6-dB pads. The pads are put on the ANT IN and DUPLEX OUT ports on the Test Set to reduce impedance mismatch error at these ports. A reference level is obtained by connecting a short calibration cable between the pads on the DUPLEX OUT an ANT IN ports. Next, the test cable or device is added between the calibration cable and one of the pads, and a measurement is made of the addition loss from the reference level. The trace of the cable loss over the frequency range swept is displayed. The average loss is also displayed on the screen.

Chapter 3 59

Overview of the Test Set’s Built-In Tools

Main Menu

Using RF T ool s Pr ogram

Swept Return Loss

This test radiates a test signal when testing antennas or cables with antennas attached to them. Verify that the level and frequency span used for the test cannot result in interferenc e to other nearby antenna s. To minimize interference when running the program, set the power level at the DUPLEX OUT port to the minimum value needed for good measurement resolution. Set the frequency range carefully.

This test measures the return loss of a cable or device in the swept mode. A SWR bridge and two 6 dB pads are connected to the Test Set. The pads are used to reduce impedance mismatch errors between the SWR bridge and the DUPLEX OUT and ANT IN ports on the Test Set. You will be prompted at the start of the test to enter the start and stop frequencies. A reference level is measured first with a short or open on the DUT port of the SWR bridge. Then the return loss is measured with the cable or ante nna-und er-test. The trace showing r etur n loss over the frequency band selected is d isplayed on the screen. Measur ed values for best and worst case return loss are printed at the top of the screen. VSWR can be calculated from the return loss.

The following formula can be used to determine the VSWR from the return loss:

VSWR

RL–

---------20

RL–

---------20

–

VSWR

110

-----------------------=

110

VSWR is sometimes stated as a ratio. For example: 1.2:1 or “one point two to one” VSWR. The first number in the ratio is calculated from the formula above. The second number in the rati o i s always one. Table 3 -1 and Table 3-2 contain some of the values from this calculation.

Table 3-1 Return Loss (0 to 20 dB) to VSWR

Return Loss (dB)0 2 4 6 8 101214161820 VSWR 8.7 4.4 3.0 2.3 1.92 1.67 1.50 1.38 1.29 1.22

Table 3-2 Return Loss (20 to 40 dB) to VSWR

Return Loss (dB) 20 22 24 26 28 30 32 34 36 38 40

∞

VSWR 1.22 1.17 1.13 1.11 1.08 1.07 1.05 1.04 1.03 1.03 1.02

60 Chapter 3

Overview of the Test Set’s Built-In Tools

Main Menu

Using RF Tools Program

Estimating Antenna Return Loss

If you are measuring the return loss of an antenna connected to the end of a known good feed line, you can determine the approximate return loss of the antenna by subtracting twice the line loss. For example, if you measure a return loss of 24 dB and the line is known to have 2 dB loss, the estimated return loss of the antenna is 20 dB (since there is a total of 4 dB of loss as the signal is sent to the SWR bridge and reflected back to the Test Set). This estimate is in error if the coaxial line and connectors do not have a return loss somewhat greater than 24 dB.

Chapter 3 61

Overview of the Test Set’s Built-In Tools

Main Menu

Using RF T ool s Pr ogram

Cable Fault

NOTE Test Signal Can Cause Interference

When testing cables attac hed to a ntenna s, test s i gna ls w ill b e r adi ate d. Verify that the signal used for the test cannot result in interference to another antenna.

This test operates over a wide frequency band. The test will always operate with a center frequency of 505 MHz. The frequency span however will be d etermined b y the length of the ca ble measured. L onger cables will use a narrower frequency span. The frequency span equals 990 MHz for cables less than 50 feet long and gets narrower as the cable length increases. It is always safe to assume that the frequency span is less than or equal to 990 MHz.

This test displays the return loss of a transmission line as a function of the distance down the line. A frequency-swept s ignal fr om the DUPLEX OUT port is applied through a resistive power divider to the cable-under-test. Signals r eflect ed from f aults in the ca ble are c ombined with the DUPLEX OUT signal in the power divider and applied to the ANT IN port. The changing interference of the forward and reflected signals, over the swept frequency band, contains information about the distance to one or more faults. The software uses a Fast Fourier Transform (FFT) to convert the frequency domain into the distance

domain. The distance displayed on the Test Set’s CRT is the physical distance to the fault with correction for the velocity factor of the cable.

Cable Fault Performance

Measurements of the cable fault location can typically be made up to 500 feet on low-loss cables and 300 feet on higher-loss cables. Resolution of the fault location is approximately 0.4 feet for cable lengths up to 50 feet and then linearly increases to 4 feet for a 500 foot cable.

62 Chapter 3

Overview of the Test Set’s Built-In Tools

Main Menu

Using RF Tools Program

Selec ting Cable Type

In the menu for this test, you can enter the following information:

• Cable length

• Cable length units

• Pressing the knob toggles the selection between feet and meters.

• C able class

• Pressing the knob allows selection of Heliax, RG, and custom options.

• The next menu varies depending on the selection for cable class:

•If Custom is selected, you can enter the cable’s velocity of propagation constant and attenuation per 100 feet (or meters). The propagation velocity must be a value between 0 and 1.

•If RG is selected, you can enter the cable type with the example [RG 58/U = 58]. You must enter a value between 0 and 1000.

•If Heliax is selected, you can enter the cable type. A list of choices (foam, air, and flex of varying thickness) is displayed. Use the knob to select the desired cable type.

•Press

k1 (or select Be gi n Te st) when all the appropriate entries

have been made.

• Connect the cables as instructed, and press

k1 (Proceed).

Velocity factors and attenuation. Cables that use polyethylene dielectric typ ically have a propagati on v el oci ty of 0.66, cables tha t use a teflon dielectric typically have a propagation velocity of 0.70. If the cable attenuation is unknown, enter 0 dB per 100 feet (or meters). Entering 0 dB/100 will produce return loss values lower than actual, but fault distance can be accurately detected.

Chapter 3 63

Overview of the Test Set’s Built-In Tools

Main Menu

Using RF T ool s Pr ogram

Typical cable fault return loss measurements. Return loss is a ratio of input power to reflected power. For example, if 100 Watts was applied to a cable and 10 Watts was returned, the return loss is 10 dB (10 log (100/10)). In the same example, if 1 Watt was returned, the return loss is 20 dB (10 log (100/1)). Typical return loss measurements for the cable loss test are listed below:

• Open-Circuit Cable = 0 dB

• Short-Circuit Cable = 0 dB

• 50-Ohm Terminated Cable = 20 to 30 dB

• Antenna = 10 to 20 dB Return loss measurements below 25 dB should be considered

excellent. For best results, the cable output should be terminated in 50 ohms.

Entering Cable Leng th

The greatest accuracy is obtained when you enter a cable length slightly greater than the actual cable length, considering length uncertainty. If you are not sure of the cable length, enter a value 1.5 times the estimated length. Depending on the return loss of the antenna or device at the end of the cable, you may see a high relative mismatch displayed at the actual length of the cable.

64 Chapter 3

Overview of the Test Set’s Built-In Tools

Main Menu

Using RF Tools Program

Replot Data Files

This utility allows you to easily retrieve and display plots which were previously stored on an SRAM PC card. One or two plots may be displayed at one time.

No measurements are performed.

Transfer Stored Data

This utility may be used to easily transfer data collection files (test results) from an SRAM PC card over the serial or HP-IB port. You do not need to write an IBASIC program. No measurements are performed.

SA (spectrum analyzer) Self Calibration ON/OFF

This test allows you to check the status of the Test Set’s spectrum analyzer, and change the status if you desire.

The RFTOOLS program uses the Test Set’s i nter nal s pectr um analyzer for making network analyzer measurements. The internal spectrum analyzer performs an automatic self calibration every 5 minutes. This automatic self calibration insures that the spectrum analyzer operates within specified limits regardless of the operating temperature. However, this self calibration can introduce instability in spectrum analyzer output after the Test Set is operating at a constant temperature (after approximately 30 minutes).

Each RFTOOLS test includes two parts; calibration and measurement. If the spectrum analyzer performs a self calibration between the calibration and measurement of the RFTOOLS test, the spectrum analyzer automatic self calibration instability will increase RFTOOLS test measurement error. To avoid this problem, you may use this test to turn off the spectrum analyzer self calibration. This self calibration should only be turned off after the unit has reached a constant powered-on operating temperature (approximately 30 minutes after power-on). By turning the self calibration off, the measurement accuracy and stability of RFTOOLS tests will improve.

Chapter 3 65

Overview of the Test Set’s Built-In Tools

Main Menu

Using RF T ool s Pr ogram

Catalog P C (Me m or y) C ar d

This utility lis ts all the files c ontained on the PC car d. The PC card that you want to catalog must be inserted prior to selecting this test.

• LIF file types are denoted by the following prefixes and suffixes:

• c prefix denotes a program code file

• l prefix denotes a library file

• p prefix denotes a procedure file

• _d suffix denotes a data file

• _p suffix denotes a plot file

• DOS file types are denoted by the following suffixes:

• .PGM suffix denotes a program code file

• .LIB suffix denotes a library file

• .PRC suffix denotes a procedure file

• .DAT suffix denotes a data file

• .PLT suffix denotes a plot file

Set Up Printer/Data Co ll ection

This utility allows you to c oll ec t measurement d ata using a printer or a PCMCIA card. The following table shows the parameters that can be set using this utility. These parameters can also be found on the PRINTER CONFIGURE screen and the I/O CONFIGURE screen.

Table 3-3 Parameters for Set Up Printer and Data Collection

• Data Collection

•Off

• Serial 9

• Serial Baud

• Parity

• Data Length

• Stop Length

• Flow Control

• None

• Xon/Xoff

• Hardware

• PCMCIA

• Printer

• Off

•Serial 9

• Serial Baud

• Parity

• Dat a Length

• Stop Length

• Flow Control

• None

• Xon/Xoff

• Hardware

• P arallel 15

• H PIB 701

• Printer Configuration

• Lines/Page

• Form feed at

start of page

• Form feed at

end of page

• HPIB Address

• Output Heading 1

• Output Heading 2

66 Chapter 3

Overview of the Test Set’s Built-In Tools

Main Menu

Using the Code Domain Analyzer

Using the Code Domain An al yzer

The code domain analyzer graphically displays the power, phase, and

timing of the CDMA signal’s 64 Walsh channels. It is a correlated measurement, requiring an external timing signal, such as the even second clock or the 16 × chi p (19.6608 MHz) clock , to in it iate a vali d measurement.

Selecting the Code Domain Anal yz er’s Co ntr ol s Menus

Several levels of menus are used to access the various controls associated with the code domain analyzer. "Cont rol Fields for CDMA

Measurements" on page 93 provides a description for each field on the

code domain analyzer’s menus. See "CDMA Measurements" on page 82 and the HP 8935 CDMA Base Station Tests Applications Guide for more information about code domain measurements.

Figure 3-2 Code Domain Analyzer Menus

Chapter 3 67

Overview of the Test Set’s Built-In Tools

Main Menu

Using the Spectrum Analyzer

Automatic Cali br ati on

During operation, the spectrum analyzer pauses for approximately 2 seconds every 5 minutes to recalibrate itself. This does not affect the accuracy of displayed measurements, but does cause a brief interruption of the displayed information during the process.

Setting Resolutio n Ba ndwidt h and Sweep R ate

The resolution bandwidth and sweep rate are determined by the span setting, and cannot be set independently.

These settings are listed in the following table.

Table 3-4 Relationship Between Span, Resolution Bandwidth, and Sweep Rate

Span

<50 kHz 0.3 28.6 kHz/second <200 kHz 1.0 329.0 kHz/second <1.5 MHz 3.0 3.0 MHz/second <3 MHz 30.0 21.4 MHz/second <18 MHz 30.0 36.3 MHz/second <200 MHz 300.0 257.0 MHz/second 1 GHz 300.0 1.0 GHz/second

Resolution BW

(kHz)

Sweep Rate

68 Chapter 3

Overview of the Test Set’s Built-In Tools

Main Menu

Using the Spectrum Analyzer

Selecting the Spectrum Analyzer’s Controls Menus

Several levels of menus are used to access the various controls associated with the spectrum analyzer (see "Spectrum Analyzer

Controls Menus" on page 69). "Control Fields for Analog Measurements" on page 123 provides a

description for each field on the spectrum analyzer’s menus.

Figure 3-3 Spectrum Analyzer Controls Menus

Chapter 3 69

Overview of the Test Set’s Built-In Tools

Main Menu

Using the Vol t m et er a nd Au di o Frequency Counter

Using the Voltme te r and Aud io Frequency Count er

The voltmeter can be used to measure ac and dc voltages. The input to the voltmeter is determined by the AF Anl In field on the AF ANALYZER screen.

To measure external voltages:

1. Select the AF ANALYZER screen.

2. Set the AF Anl In field to Audio In.

3. Set the Audio In Lo field to match the source you are measuring (600 ohm impedance, floating output amplifier, ground referenced voltage). See the "Audio In Lo" field on page 127 for mor e information.

4. Connect the signal to be measured to the AUDIO IN connector(s). The AUDIO IN HI connector can be used alone as long as the Audio In Lo field is set to Gnd. The AUDIO IN LO connector must also be used if the Audio In Lo field is set to 600 to Hi or Float.

The ac level is displayed. See Figure 3-4 .

5. Select the lower-right measurement display field. See Figure 3-4 .

• Select DC Level to display the dc level.

• Select AF Freq to display the audio frequency.

Figure 3-4 Measuring AC and DC Voltages

Set to Audio In.

AC Level

Set to DC Level or AF Freq.

Set to match source.

70 Chapter 3

Overview of the Test Set’s Built-In Tools

Main Menu

Using the Oscilloscope (Scope)

The built-in 50 kHz oscilloscope provides

• multiple triggering formats (internal and external)

• single-shot and pre-trigger viewing for single events

• full marker capability with automatic level and time readout Time/division, volts/division and vertical offset are displayed and can be

changed using the front-panel knob. Input to the oscilloscope is provided from various sources including

direct inputs to the AUDIO IN (HI and LO) an d A NA LOG MODULATION IN connectors. Oscilloscope functions are accessed from the AF ANALYZER and SCOPE screens.

Figure 3-5 Inputs and Filters for the Oscilloscope

Using the Oscilloscope (Scope)

FM Demod AM Demod SSB Demo d

Audio In connector

Ext Mod connector

FM Mod AM Mod Audio Out

Controlled by AF Anl In field

Input

Filters

De-emp

Notch

Controlled by Scope To field

To Scope

To Scope Monitor Output connector

Chapter 3 71

Overview of the Test Set’s Built-In Tools

Main Menu

Using the Oscilloscope (Scope)

Selecting the Oscil loscope ’s Input

Step 1. Press Shift, then RF Anl (AF Anl) to select the AF ANALYZER

screen.

Step 2. Select the AF Anl In field. A list of choices appears. Step 3. Select the desired input to the scope:

• FM De mod for FM demodulated audio from input signals connected to the RF IN/OUT or ANT IN connectors.

• AM De mod for AM demodulated audio from input signals connected to the RF IN/OUT or ANT IN connectors.

• SSB Demod for SSB demodulated audio from input signals connected to the RF IN/OUT or ANT IN connectors.

• Audio In for a signal connected to the AUDIO IN connector.

• Ext Mod for a signal connected to the ANALOG MODULATION IN connector.

• FM Mod for the FM modulated audio from the RF generator section.

• AM Mod for the AM modulated audio from the RF generator section.

• Audio Out for the signal present at the SCOPE MONITOR OUTPUT connector.

The input to the oscilloscope is displayed on the SCOPE screen.

Selecting the Oscilloscope’s Filters

Step 1. Press Shift, then RF Anl (AF Anl) to select the AF ANALYZER

screen.

Step 2. Select the Scope To field. A list of choices should appear. Step 3. Select the desired filtering for the signal:

• Input if you want no filtering (dc coupled)

• Filters to rout e the audi o to the oscilloscope after passing through Filters 1 an d 2 (ac coupled).

• De-emp to route the audio to the oscilloscope after passing through Filters 1 and 2, and the de-emphasis circuitry (ac coupled).

72 Chapter 3

• Notch to route the audio to the oscilloscope after passing through Filters #1 and #2, the de-emphasis circuitry, and notch circuitry (ac coupled).

Triggering the Oscilloscope

Main Menu

You can control following triggering features of the oscilloscope:

• Trigger external or internal

• Automated or normal triggering

• Continuous or single shot triggering

• Trigger level

• Trigger delay The oscilloscope is triggered using the Trigger menu. Select this menu

with the following procedure:

Overview of the Test Set’s Built-In Tools

Using the Oscilloscope (Scope)

Step 1. Press Step 2. Select the Controls field, then choose Trigger from the list

of choices.

Shift, then Spec Anl (Scope) to go to the SCOPE screen.

Using the O scillosco pe’ s M ar ker

The marker is used to help you make measurements with the oscilloscope. By repositioning the marker, you can measure the level and time.

The marker is controlled usi ng the marker menu. Select this m enu with the following procedure:

Step 1. Press Step 2. Select the Controls field, the choose Marker from the list of

choices.

Shift, then Spec Anl (Scope)to go to the SCOPE screen.

Chapter 3 73

Overview of the Test Set’s Built-In Tools

Main Menu

Using IB_U TI L P rograms

Using IB_UTIL Programs

See "Securing a Test Procedure" on page 75 for information about the SECURE_IT program. See "Clearing RAM" on page 76 for informat io n about the RAM_MANAGER program.

COPY_PL

The COPY_PL program allows you to copy procedures and libraries from one PC card to another. See the HP 8935 Programmer’s Guide for more information about procedures and libraries.

FILE_XFER

The FILE_XFER (file transfer) program transfers files on a PC card to a device attached to either the HP-IB or to SERIAL PORT 9.

RAM_USAGE

The RAM_USAGE program lists the following information about the

Test Set’s RAM:

• Total RAM installed

• RAM disk allocations

• Save register allocations

• Approximate RAM available for IBASIC programs

74 Chapter 3

Securing a Test Procedure

Main Menu

The password option for securing a test procedure is accessed by loading and running the SECURE_IT ROM program. This program is accessed by running the IB_UTIL program .

Step 1. Select the SOFTWARE MENU screen. Step 2. Select the Select Procedure Location: field and choose

ROM.

Step 3. Select the Select Procedure Filename: fie ld.

a. Select IB_UTIL from the list of programs. Press Run Test to

display a list of procedures; select SECURE_IT and follow directions to secure the desired information.

Overview of the Test Set’s Built-In Tools

Securing a Test Procedure

Chapter 3 75

Overview of the Test Set’s Built-In Tools

Main Menu

Clearing RAM

Clearing R AM

RAM can be cleared using the RAM_MANAGER program in the Test Set’s ROM. This program clears all RAM, including any SAVE/RECALL registers saved to Internal RAM.

This program is accessed by running the IB_UTIL program.

Step 1. Select the SOFTWARE MENU screen. Step 2. Select the Select Procedure Location: field and choose

ROM.

Step 3. Select the Select Procedure Filename: field.

•Select IB_UTIL from the list of programs. Pres s Run T est to display a list of procedures; select RAM_MANAGER and fo llow directions to clear RAM.

To preserve the SAVE/RECAL L registers, do not use the RAM_MANAGER program. Instead, load any o ther test program from a c ard or f rom RAM to clear the previous test program, and then reload the desired test.

See the "Save/Recall" field on page 179, and "Savi ng and Rec alling

Instrument Setups" field on page 48 for more info rmation ab o u t

save/recall registers.

76 Chapter 3

Overview of the Test Set’s Built-In Tools

Main Menu

Using the LISTOPTS (list options) Program

Using the LISTOPTS (lis t opti ons ) Pr ogra m

You can list the options that a r e installed in your Test Set ( i f a ny) using the LISTOPTS program. LISTOPTS a lso d i s plays the f i rmware v er sion of your Test Set.

To run the LISTOPTS program

Step 1. Select the SOFTWARE MENU screen. Step 2. Select the Select Procedure Location: field and choose

ROM.

Step 3. Select the Select Procedure Filename: fie ld. Step 4. Select LISTOPTS from the list of programs. Step 5. Press Run Test to run the program and follow the directions

on the screen.

Chapter 3 77

Overview of the Test Set’s Built-In Tools

Main Menu

Using the DE MO Program

Using the DEMO Progra m

You can use the DEMO program to learn about the capabilities of the Test Set. This program demonstrates some of the most useful features of the Test Set.

To run the DEMO program

Step 1. Select the SOFTWARE MENU screen. Step 2. Select the Select Procedure Location: field and choose

ROM.

Step 3. Select the Select Procedure Filename: field. Step 4. Select DEMO from the list of programs. Step 5. Press Run Test to run the program and follow the directions

on the screen.

78 Chapter 3

Overview of the Test Set’s Built-In Tools

Main Menu

Using the ST _P LT (store or plot) Pr ogram

Using the ST_PLT (store or pl ot) Pro gra m

This program allows you to store a spectrum analyzer, or oscilloscope trace on PC card or to plot a stored trace from a PC card.

To run the ST_PLT program

Step 1. Select the SOFTWARE MENU screen. Step 2. Select the Select Procedure Location: field and choose

ROM.

Step 3. Select the Select Procedure Filename: fie ld. Step 4. Select ST_PLT from the list of programs. Step 5. Press

directions on the screen.

Step 6. Press

as frequency, level, span, and so forth).

k1 (Run Test) to run the program and follow the

k2 (Show Info) to display the trace’s parameters (such

Chapter 3 79

Overview of the Test Set’s Built-In Tools

Main Menu

Using the ST_PLT (store or plot) Program

80 Chapter 3

4 CDMA Measurements - Screens

Main Menu

and Control Fields

• “Average Power Measurements” on page 82

• “Channel Power Measurements” on page 83

• “Rho Measurements” on page 84

• “Error Vector Magnitude (EVM) Measurements” on page 88

• “Code Domain Measurements” on page 89

• “Control Fields for CDMA Measurements” on page 93

CDMA Measurements - Screens and Control Fields

Main Menu

Average Power Measurements Average Power Measurements

CDMA Measurements

Average Power Measurements

Avg Pwr

Avg Pwr displays the average power level of all signals at the RF IN/OUT port. The units (watts, volts, or dBm) can be changed by positioning the cursor in front of the units field and then pressing the desired units key. (See "Input Port" field on page 136.) Refer to the HP 8935 CDMA Base Station Tests Application s Guide for more information about average power measurements.

Screens on which this measurement is displayed.

• CDMA ANALYZER

• CDMA GENERAT OR

ADC FS

ADC FS is displayed when average power is measured. ADC FS indicates how close the measured power level is to the maximum allowed input level at the RF IN/OUT port for a particular Pwr Gain setting (on the CDMA ANALYZER screen). Changes to ADC FS can be made by altering the Pwr Gain field setting and by altering the sig nal level into the RF IN/OUT port. ADC FS should be between −1.0 and −10 dB when the Pwr Gain field is set to Auto to −0.5 dB when set to Hold FS goes above −0.5 dB. Measurement accuracy may be degraded if ADC FS goes below −10 dB.

Screens on which this measurement is displayed.

• CDMA ANALYZER

• CDMA GENERAT OR

. The measurement will be aborted if ADC

, and can be manually set up

82 Chapter 4

CDMA Measurements - Screens and Control Fields

Main Menu

Channel Power Measurements Channel Power Measuremen t s

Channel Power Measurement s

Chan Pwr

Channel power is the absolute power level of the RF signal in a

1.23 MHz b andwidth centered around the RF channel or tune frequency setting. This measurement must be calibrated using the Chan Pwr Cal field each time the tune frequency is changed. Refer to the HP 8935 CDM A Base Station Tests Application s Guide for more information about channel power measurements.

ADC FS

ADC FS is displayed when channel power is measured. ADC FS indicates how close the measured power level is to the maximum allowed input level at the RF IN/OUT port for a particular Gain sett ing (on the CDMA ANALYZER screen). Changes to ADC FS can be made by altering the Gain field setting and by altering the signal level into the RF IN/OUT port. ADC FS should be between −1.0 and −10 dB when the Gain field is set to Auto when set to Hold. The measurement will be aborted if ADC FS goes above −0.5 dB. Measurement accuracy may be degraded if ADC FS goes below −10 dB.

, and can be manually set up to −0.5 dB

Screens on which this measurement is displayed.

• CDMA ANALYZER

• CDMA GENERATOR

Chapter 4 83

CDMA Measurements - Screens and Control Fields

Main Menu

Rho Measurements Rho Measurements

Rho Measurements

Rho

Rho is a measure of CDMA waveform quality which indicates how well the measured signal (the pilot signal transmitted by the base station under test) corr ela tes w ith the ideal reference waveform (the ideal pi lot generated by the Test Set which is mathematically perfect). This measurement is done through a complex DSP algorithm. Perfect correlation is when rho is equal to 1. The CDMA standard specifies

0.912 as the minimum accepted performance for CDMA base stations. To make rho measurements, the base station needs to be configured to

transmit only a pilot signal. The test equipment is then triggered by any of the selectable CDMA clocks.

Many different things can contribute to rho failure; this is a short list of them:

• compression in the linear power amplifier

• phase non-linearities (group delay)

• carrier feedthrough (see "Carrier Feedthrough" on page 87)

• I/Q magnitude and phase errors (see "Magnitude Error" on page 88 and "Phase Error" on page 88)

Figure 4-1 Rho

Power that correlates with ide al

0OWERTHATCORRELATESWITHIDEAL



Total Power

4OTAL 0OWER

Signal Power

ρ ρ

Screens on which this measurement is displayed.

• CDMA ANALYZER

• CDMA GENERAT OR

3IGNAL0OWER



Signal Power + Error Power

3IGNAL0OWER%RROR0OWER

0.912





84 Chapter 4

CDMA Measurements - Screens and Control Fields

Main Menu

Rho Measurements R ho Measu rements

Frequen c y E r ror

Frequency error is displayed when the Rho m easurement is selected.

Frequency error is the differ ence betwe en the base s tation’s transmitter frequency and the frequency you enter in the Tune Freq field.

Screens on which this measurement is displayed.

• CDMA ANALYZER

• CDMA GENERATOR

Time Offset

Time offset is displayed when the Rho m easurement is selected. Time offset is the time difference between the base station’s even second and the start of the short sequence. It indicates how well your transmitter’s signal is time-aligned to system time. Time offset is measured at the base station’s antenna. The displayed value is based on the value entered in the PN Offset field. (See the PN O ffset field description, on

page 106.)

In Figure 4-2 on page 86 the first example is a measurement with a time offset of zero. The beginning of the received data block aligns with the first pilot PN chip of the reference signal. Zero time offset indicates that the trigger event to t he CDMA Analyze r coi ncid ed with the a rri val of the base station signal’s first pilot PN chip.

When the base station’s signal is delayed relative to the trigger event, time offset will be a positive value. The second example is a measurement with a positive time offset. The beginning of the data block will align with a portion of the reference signal toward the end of a pilot PN sequence. This indicates that the trigger event to the CDMA Analyzer occurred when the base station was still transmitting a pilot PN sequence prior to the first pilot PN chip of the expected sequence.

When the base station’s signal is early relative to the trigger event, time offset will be a negative value. The third example is a measurement with a negative time offset. The beginning of the data block will ali gn with a portion of the r ef er enc e signal after the first p i lot PN chip. This indicates that the trigger event to the CDMA Analyzer occurred after arrival of the base station signal’s first pilot PN chip.

Screens on which this measurement is displayed.

• CDMA ANALYZER

Chapter 4 85

• CDMA GENERATOR

• CODE DOM (Code Domain Analyzer)

CDMA Measurements - Screens and Control Fields

Main Menu

Rho Measurements Rho Measurements

Figure 4-2 Time Offset

86 Chapter 4

CDMA Measurements - Screens and Control Fields

Main Menu

Rho Measurements R ho Measu rements

Carrier Feedthrough

Carrier feedthrough is displayed when the Rho measurement is selected. Carrier feedthrough is a common cause of bad rho measurements. Carrier feedthrough is a result of RF carrier signal feeding through the I/Q modulator and getting on the output circuitry without getting modulated. A good carrier feedthrough level is lower than −25 dB (such as −29 dB).

As shown in the diagram, a perfect constellation is offset by the magnitude of the carrier feedthrough. In the frequency domain, carrier feedthrough can show up as an uncorrelated energy spike that can be seen on the spectrum analyzer by closely scanning the top of the trace. The effects of carrier feedthrough can also show up as higher noise levels on the CODE DOM screen. The inactive Walsh codes will be pushing the −27 dB specification for noise. Carrier feedthrough can be caused by the lack of isolation across the mixer and cavity of the transmitter’s I/Q modulator. Shielding can help reduce carrier feedthrough.

Figure 4-3 Carrier Feedthrough

Amplitude

!MPLITUDE

Frequency Domain

&REQUENCY$OMAIN

Screens on which this measurement is displayed.

• CDMA ANALYZER

• CDMA GENERATOR

• CODE DOM (Code Domain Analyzer)

#ARRIE R&EEDTHROUGH

Carrier Feedthrough

Frequency

&REQUENCY

Signal Power + Error Power

3IGNAL0OWER%RROR0OWER

ORIGIN

origin

I/Q Domain

)1$OMAIN

)

Chapter 4 87

CDMA Measurements - Screens and Control Fields

Main Menu

Error Vector Magnitude (EVM) Measurements Error Vector Magnitude (EVM) Measurements

Error Vector Magnitude (EVM) Measurements

EVM

EVM is a measurement of the accuracy of the phase a nd amplitude of t he QPSK (Quadrature Phase Shift Keying) or Offset QPSK (OQPSK) modulation. Expressed as a percentage, it is the RMS magnitude value of the error vector which connec ts the ideal si gnal phasor to a measured signal phasor at the detection decision points.

Figure 4-4 Components of Error Vector Magnitude

Magnitude Error

evm1.ds4

The magnitude of this error vector represents the “error” between the ideal signal and the measured signal.

As part of the measurement, the signal is corrected for clock delay, carrier frequency, carrier phase, and amplitude scaling.

Screens on which this measurement is displayed.

88 Chapter 4

• CDMA ANALYZER

• CDMA GENERAT OR

Magnitude Error

Magnitude Error is the difference in the RMS magnitude value (in percent) between the ideal signal phasor and the compensated, measured signal phasor at the detected decision points.

Phase Error

Phase Err or is the RMS value of the difference in phase (degrees) between the ideal signal phasor and the c ompensa ted , measured s ignal phasor at the detection decision points.

CDMA Measurements - Screens and Control Fields

Main Menu

Code Domain Measurements Code Domain Measuremen ts

Code Domain Measurements

The following measurements are displayed on the CODE DOM (code domain analyzer) screen: power, fast power, timing and phase. Measurements are selected from the Measurement field on the Main controls menu.

Time offset (Tm Ofs) and frequency offset (FreqOfs) are always displayed when any code domain measurement is made. Carrier feedthrough (CarFT) is also displayed except when fast power is measured.

Code Domain Power

Other users & noise

Synch

1.2288 MHz

Paging

Pilot

User #2 User #1

freq

&REQUENCY$OMAIN

Frequency Domain

0123456789 32 63

Paging

Pilot

User

Synch

User

Code Domain

#ODE$OMAIN

Walsh Code

Chapter 4 89

CDMA Measurements - Screens and Control Fields

Main Menu

Code Domain Measurements Code Domain Measurements

Code Domain Power (Power)

Code domain power displays the power in each of the 64 Walsh channels, relative to the total power inside 1.23 MHz bandwidth centered at the tune frequency. The 64 Walsh codes (0 through 63) are

represented by a verti cal b ar on the a nalyzer’s display. Because this i s a relative measurement, the unit-of-measure is always dB. This allows a comparison of signal levels between the pilot, sync, paging and traffic channels. (Pilot is about two-thirds of the total energy.)

Figure 4-5 Reading Code Domain Power

Walsh 0 (Pilot)

Marker

Set to Marker.

Screens on which this measurement is displayed.

• CODE DOM (Code Domain Analyzer)

Select the Walsh channel.

Read code domain po wer.

90 Chapter 4

CDMA Measurements - Screens and Control Fields

Main Menu

Code Domain Measurements Code Domain Measuremen ts

Fast Power

Fast power is a faster method of measuring c ode domain power. A value for Time Offset must be transferred from a non-fast power measurement before fast measurements begin, or when changes to any of the following fields occur: Data Rate, PN Offset, CDMA TB, Synth Ref.

See the "Ofs Trnsfer" field on page 105 for more information. The number of measurement averages can be entered in the Num Avgs

field on the FP Setup menu. This number is used to calculate and display succe ssive code domain power mea s ure ments.

Screens on which this measurement is displayed.

• CODE DOM (Code Domain Analyzer)

Code Domain Timing (Timing)

Code domain timing is the difference in time between pilot (Walsh 0) and other Walsh codes with the same forward CDMA channel. In the CODE DOM screen, this measurement is indicated as positive or negative bar with the size of the bar indicating how far ahead or behind the other Walsh channels are relative to the pilot. Signals above the reference are leading in time; signals below the reference are lagging. (See figure 4-6.)

Screens on which this measurement is displayed.

• CODE DOM (Code Domain Analyzer)

Chapter 4 91

CDMA Measurements - Screens and Control Fields

Main Menu

Code Domain Measurements Code Domain Measurements

Code Domain Phase (Phase)

Code domain phase is the difference in phase between the pilot and other code channels (Walsh codes) within the same forward CDMA channel. It displays the phase error for each of the 64 Walsh channels relative to the pilot channel (Walsh 0). This measurement is indicated as positive or negative bars on the Test Set’s CODE DOM screen. The size of the bar indicates how much the phase of other Walsh codes lead or lag the pilot. Signals above the reference are leading in phase; signals be lo w the refer e n ce are lagging.

Figure 4-6 Code Domain Timing and Phase

4IME













7ALSH#ODE

0HASE







Screens on which this measurement is displayed.

• CODE DOM (Code Domain Analyzer)





7ALSH#ODE

92 Chapter 4

CDMA Measurements - Screens and Control Fields

Main Menu

ADCfs or ADC FS Amplitude

Control Field s for CDMA Meas ur ement s

ADCfs or ADC FS

ADCfs indicates how close the measured power l evel is to t he maximum

allowed input level for the analyzer’s Analog-to-Digital Converter (ADC). Th is level is affected by the Gain setting on the CODE DOM screen, the Input Atten, Gain, and, Pwr Gain settings on the CDMA ANALYZER screen, and the RF level of the signal connected to the Test Set.

Amplitude

For best measurement performance, ADCfs should be between

−10 dB. The measurement will be aborted if ADCfs goes above 0 dB.

Measurement accuracy may be degraded if ADCfs goes below −10 dB.

−1.0 and

Screens o n which th is field is present

CODE DOM (Code Domain Analyzer) screen: gain controls menu

CDMA ANALYZER (ADC FS) CDMA GENERATOR (ADC FS)

This field sets the output level of the RF generator to the RF IN/OUT or DUPLEX OUT port. Use the DUPLEX OUT port for signal levels greater than −26 dBm .

Screens o n which th is field is present

CDMA GENERATOR

Chapter 4 93

CDMA Measurements - Screens and Control Fields

Main Menu

Analyzer (CDMA analyzer) Analyzer (code domain analyzer)

Analyzer (CDMA analyz er)

The Analyzer field controls three functions:

• Arm Meas arms the CDMA analyzer. The CDMA analyzer needs to be armed only when Single

• Single/Cont selects between “single” measurements and “continuous” measurements.

• When Single is chosen, you must arm each measurement by

selecting the Arm Meas field (see above).

(see below) is selected.

• When Cont

automatically armed. The default selection is Cont

• Disarm disarms the CDMA analyzer during single operation. To stop continuous measurements, select Single does not prevent the analyzer from being re-armed during continuous measurements

(continuous) is chosen, measurements are

Screens on which this field is present

CDMA ANALYZER

Analyze r (c ode domain analyze r)

This field is used to arm or disarm measurements when making a single measurement (does not affect continuous measurements). Selecting Disarm stops the analyzer during a single measurement.

See the "Measurement" field on page 104 for more information.

Screens on which this field is present

COD DOM (Code Domain Analyzer): main controls menu

. Selec ti ng Disarm

94 Chapter 4

CDMA Measurements - Screens and Control Fields

Main Menu

Anl Dir Auto Zero

Anl Dir

This field is used to select the type of signal (forward or reverse link) to analyze.

Anl Special

• Fwd

• Rev

Default selection: Fwd

sets the analyzer to look for base station transmitter data

(forward link).

sets the analyzer to look for mobile transmitter data (reverse

link).

Screens o n which th is field is present

CDMA ANALYZER

Analyz e r special mod e s change h o w I Q modul at e d sign als are analyze d.

• Normal sets the CDMA generator and CD MA a nalyzer to create and analyze signals with standard rotation.

• Inverted sets reverse rotation for I and Q signals; opposite to the direction specified in the IS-95 standards. In this mode, the CDMA generator creates reverse-rotation IQ signals and the CDMA analyzer expects reverse-rotation IQ signals.

Auto Zero

Screens o n which th is field is present

CDMA ANALYZER

This field is displayed for average power measurements.

is used to automatically zero the average power measurement

Auto

periodically during operation.

Manual

you must manually zero the average power measurement by selecting the Pwr Zero field.

is used to override the Auto feature. When Manual is sele cted,

Screens o n which th is field is present

CDMA ANALYZER

Chapter 4 95

CDMA Measurements - Screens and Control Fields

Main Menu

Car FT Chn Pwr Cal

Car FT

This field is a measurement display field. See "Ca rrier Feedthrough" on

page 87 for more information about this measurement.

Screens on which this field is present

COD DOM (Code Domain Analyzer)

Chn Pwr Cal

This field is displayed when the channel power measurement is selected. It is used to calibrate the channel power measurement. When this field is selected, an internally generated calibration signal is measured using the average power technique. Channel power is also measured and a correction factor is generated. This correction factor is applied to subsequent channel power measurements. Calibration should be performed whenever a new set of measurements is made and whenever the frequency of the measured signal is changed. See

"Calibrating the Channel Power Measurement" on page 41 for more

information.

Screens on which this field is present

CDMA ANALYZER

96 Chapter 4

CDMA Measurements - Screens and Control Fields

Main Menu

Controls Controls

Controls

Code domain analyzer settings are arranged into several menus that are accessed using the Controls field. The control groups are:

• Main accesses the RF In/Ant, Tune Freq (or RF Channel), Measurement, and Analyzer fields.

• Marker controls the marker to look at the level of individual Walsh channels.

• Trigger accesses the trigger controls: Qual Event and Trig Event.

• Aux accesses the PN Offset, measurement Threshold, and measurement Interval fields.

• Gain lets you alter the gain into the CDMA analyzer while reading the ADCfs value.

• FP Setup accesses the offset transfer and num ber of a vera ges f ields used to make fast power measurements.

Many of these controls are duplicates from the CDMA ANALYZER and CDMA GENERATOR screens.

Screens o n which th is field is present

COD DOM (Code Domain Analyzer): all menus

Chapter 4 97

CDMA Measurements - Screens and Control Fields

Main Menu

CW RF Path Data Rate

CW RF Path

This field selects the path for the RF generator’s signal.

• Bypass disables the IQ modulator. This mode is used when generating standard AM, FM, or CW signals in the Test Set.

• IQ

enables the IQ modulator.

See the "Data Source" field on page 99 for more informat ion.

Screens on which this field is present

CDMA GENERATOR

Data Rate

This field allows receiver testing at data rates of 9.6 or 14.4 Kbps. If the data buffer is the selected data source, and the data rate is

changed, the transmission state will change to Idle. Sele ct Send to resume data output at the new rate.

Choices

• 14. 4 Kbps

• 9.6 Kbps

Default selection: 9.6 Kbps

Screens on which this field is present

CDMA GENERATOR

98 Chapter 4

CDMA Measurements - Screens and Control Fields

Main Menu

Data Source Data Source

Data Source

This field selects where the baseband quadrature spreader gets its data. This field is removed when the Gen Mode field is set to Noise.

• Zeroes uses a data stream of all 0’s that is not encoded before being applied to the baseband quadrature spreader and output.

• Ext uses external data from the DATA IN conne ctor. This d ata is no t encoded before being applied to the baseband quadrature spreader.

• Random uses 300 frames of random, error-free data. (See Data Buff (below) for Single/Cont, Idle/Send operation.)

• Data Buff uses data previ ously loaded into the data buffer . You can load your own data into the buffer over HP-IB. This data is encoded before baseband quadrature spreading. Choosing this selection displays these additional fields:

• Single/Cont

• Single is select ed.

• Cont Send is selected. Changing to single operation while sending causes the data to be interrupted after the current 20 ms frame.

• Send/Idle

• Send edges of the internal 80 ms clock are detected.

• Idle transmitted. Selec tin g Idle data at the completion of the current 20 ms frame. A data stream of all zeroes (encoded) continues to be transmitted after the initial data stream is interrupted. This is different from the Zeroes selection above where the data is not encoded.

• Start Frame specifies the first frame of data to send.

• # of Frames specifies how many frames of data to send.

causes the data stream to be output once when Send

causes the d ata stream to be repeated conti nuously w hen

causes the data stream to be output after two rising

indicates that data from the buffer is not being

while sending data i nter r upts the

Screens o n which th is field is present

CDMA GENERATOR

Chapter 4 99

CDMA Measurements - Screens and Control Fields

Main Menu

Even Sec In Gain

Even Sec In

This field controls the internal connection of the EVEN SECOND SYNC IN connector to the CDMA analyzer.

Freq Err

• When Enable SYNC IN connector synchronize the timing circuits.

• When Not SYNC IN are ignored. This mode may be useful when signals other than an even-second clock are used for synchronization. For example, when using a one-second clock, you would select Not after synchronization to prevent the internal even- second clock from being retriggered half-way through its cycle.

is selected, signals applied to the EVEN SECOND

is selected, input signals applied to the EVEN SECOND

Screens on which this field is present

CDMA ANALYZER CDMA GENERATOR

This measurement display field displays the frequenc y offset (frequency error). See "Frequency Error" on page 85 for more information about this measurement.

Screens on which this field is present

COD DOM (Code Domain Analyzer)

Gain

This field sets the IF gain of the CDMA analyzer for rho, EVM, and channel power measurements. (Range: 0 dB to 36 dB in 6 dB steps.)

Gain is adjusted two ways:

• Auto measures the signal level and automatically adjusts the gain.

• Hold disables automatic operation to allow you to manually enter the desired gain by selecting the current gain setting and entering a new value using the keypad or cursor control knob.

This field is replaced by the Pwr Gain field when measuring average power. See the "Input Atten" field on page 102 for more in fo rmation.

Screens on which this field is present

CDMA Analyzer COD DOM (Code Domain Analyzer): gain controls menu

100 Chapter 4

HP (Hewlett-Packard) E6380-90019 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Product Description

In This Book

Conventions Used in this Book

1 Getting St arted

Before Connecting a Radio

Changing the Test Set’s Display

Changing the Measurement Sc reen

Changing the Control Fie lds

Instrument Quick Check

2Operating Overview

Displaying CDMA Measurements

Channel Power, Rho, EVM, Average Power

Code Domain Measurements (Power, Timing, Phase)

Displaying Analog Measurements

RF Measurements

Displaying AF Measurements

Calibrating the Channel Power Measuremen t

Changing the Increment or Decrement Setting

Using the Factor of 1 0 Inc rement/Decrement Keys

Using Measurement Li m it In di c at or s

Setting A Measurement Reference

Averaging Measuremen ts

How the Test Set Averages Measurements

Setting an RF Generator/Analyzer Offset

Saving and Recalling Instrument Setups

Register Name s

Memory Conside r atio ns

Instrument Hardware Changes

Using USER Keys

Using Pre-Defined USER Keys

Assigning and Releasing USER Keys

Replacing Batteries

Using RF T ool s Pr ogram

Swept Gain

Discrete Freq Insertion Loss

Swept Insertion Loss

Swept Return Loss

Cable Fault

Replot Data Files

Transfer Stored Data

SA (spectrum analyzer) Self Calibration ON/OFF

Catalog P C (Me m or y) C ar d

Set Up Printer/Data Co ll ection

Using the Code Domain Analyzer

Using the Spectrum Analyzer

Automatic Cali br ati on

Setting Resolutio n Ba ndwidt h and Sweep R ate

Selecting the Spectrum Analyzer’s Controls Menus

Using the Vol t m et er a nd Au di o Frequency Counter

Using the Oscilloscope (Scope)

Selecting the Oscil loscope ’s Input

Selecting the Oscilloscope’s Filters

Triggering the Oscilloscope

Using the O scillosco pe’ s M ar ker

Using IB_U TI L P rograms

COPY_PL

FILE_XFER

RAM_USAGE

Securing a Test Procedure

Clearing RAM

Using the LISTOPTS (list options) Program

Using the DE MO Program

Using the ST _P LT (store or plot) Pr ogram

CDMA Measurements

Average Power Measurements

Channel Power Measurement s

Rho Measurements

Error Vector Magnitude (EVM) Measurements

Code Domain Measurements

Control Field s for CDMA Meas ur ement s

ADCfs or ADC FS

Amplitude

Analyzer (CDMA analyz er)

Analyze r (c ode domain analyze r)

Anl Dir

Anl Special