HP (Hewlett-Packard) 8935 User Manual

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

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Test Set

AMPS Base Station Tests

Application Guide

Firmware Version: A.01.00 and above

HP Part Number: E6380-90017

Revision A

Printed in U.S.A

November 1997

© Copyright Hewlett-Packard Company 1997

Notice

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

All Rights Reserved. Reproduction, adaptation, or translation without
prior written permission is prohibited, except as allowed under the
copyright laws.

This material may be reproduced by the U.S. Government pursuant to
the Copyright License under the clause at DFARS 52.227-7013 (APR

1998).

2

Manufacturer’s Declaration

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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
Accordi n g t o ISO 7779:1988 /EN 27779:1991 (Type Te st ).

Herst ellerbeschei nigung

Diese Information steht i m Zusammenhang mit den Anf orderungen der

Maschinenlärminformationsverordnung vom 18 January 1991.
Schalldruckpegel Lp < 70 dB(A).
Am Arbeitsplatz
Normaler Betrieb.
Nach ISO 7779:1988/E N 27779:1991 (Typprüfung) .

3

Safety

!

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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 SYMBOLS

Indicates instrument damage can occur i f indic ated operat ing limits a re
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, coul d result in personal inj ury. Do not
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

4

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

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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 dangerous. Intentional interruption
is prohibited.

Do not expose to or operate this instrument in outdoor

!

atmospheric conditions such as direct rain, hail, sleet, snow,
icing, sunshine or wind. Operate this instrument only within its
specified temp erature humidity con ditions.

This instrument is equipped with internal ground 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. Attention-ne pas utiliser de rallonge pour
raccorder le detecteur-disjoncteur a la prise de courant.

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

8120.

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

WARNING Whenever it is likely that the protection has been impaired, 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 terminal of the power source.

If this product is not used as specified, the protection provided
by the equipment could be impaired. This product must be used
in a normal condition (in which all means for protection are
intact) only.

No operator serviceable parts in this product. Refer servicing to
qualified personnel. To prevent electrical shock, do not remove
covers.

Servicing inst ructions are for use by qualified personnel only .
To avoid electrical shock, do not perform any servicing unless
you are qualified to do so.

5

The opening of covers or removal of parts is likely to expose

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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 cl oth or one s lightl y da mpened wi th water to
clean the external case parts. Do not attempt to clean internally.

6

Product Markings

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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 Association .

CERTIF ICATION

Hewlett-Packard Company certif ies tha t thi s produc t met its publ i shed
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.

7

Warranty

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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

The foreg o in g warranty shal l n o t a pply to defects resu 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.

EXCLUSI VE REMED IE S

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.

8

ASSISTANCE

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Main te na n c e A gr e e m en ts

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

9

Regional Sales Offices

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IMPORTANT Regional Sales an d Se rv ic e Of f ic e s

Eastern USA
Sales Office
Hewlett-Packard Company
2101 Gather Rd.
Rockville, MD 20850
Tel: [phone]

Southern USA
Sales and Service
Hewlett-Packard Company
1995 North Park Place
Atlanta, GA 30339
Sales
Tel: [phone]
Fax: [phone]
Service
Tel: [phone]
Fax: [phone]

Western USA
Sales and Service
Hewlett-Packard Company
24 Inverness Place East
Englewood, CO 80112
Sales
Tel: [phone]
Fax: [phone]
Service
Tel: [phone]
Fax: [phone]

Eastern USA
Sales Office
Hewlett-Packard Company
2101 Gather Rd.
Rockville, MD 20850
Tel: [phone]

Southern USA
Service Center
Hewlett-Packard Company
930 E. Campbell Road
Richardson, TX 75081
Tel: [phone]

Western USA
Sales and Servic e
Hewlett-Packard Company
1421 South Manhattan Avenue
Fullerton, CA 92631
Sales
Tel: [phone]
Fax: [phone]
Service
Tel: [phone]
Fax: [phone]

Midwestern USA
Sales and Service
Hewlett-Packard Company
5201 Tollview Drive
Rolling Meadows, IL 60008
Tel: [phone]

Western US A
Service Center
Hewlett-Packard Company
301 E. Evelyn Avenue
Mountain View, CA 94041
Tel: [phone]
Fax: [phone]

United States of America
Customer I nformation Center
Hewlett-Packard Company
Tel: [phone]
6:00 am to 5:00 pm Pacific Tim e
Parts Direct: 1-800-227-8164

South Eastern Europe
Sales and Service
Hewlett-Packard Ges. m.b.h.
Liebigasse 1
P.O. Box 72
A-1222 Vienna, Austria
Telephone: [phone]
Telex: 13 4425

10

European Multicountry Region
Sales and Servic e
Hewlett-Packard S.A.
P.O. Box 95
150, Route dv Nant_dl_AVRIL
CH-1217 Meyrin 2
Geneva, Switzerland
Telephone: [phone]
Fax: [phone]

North e rn Europe
Sales and Service
Hewlet t- P a cka r d Ne de rland B.V.
Startbaan 16
1187 XR
Amstelveen, The Netherlands
P.O. Box 667
Telephone: [phone] X 6631
Fax: [phone]NL

Asia

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Sales and Servic e
Hewlett-Packard Asia Ltd.
22-30/F Peregrine Tower
Lippo Center
89 Queensway, Central
Hong Kong
G.P.O. Box 863 Hong Kong
Telephone: [phone]
Fax: [phone]

Japan
Sales and Service
Yokogawa-Hewlett-Packard Ltd.
3-29-21, Takaido-Higashi
Suginami-Ku, Tokyo 168
Telephone: [phone]
Fax: [phone]

International Sales Branch
Headquarter s

Sales and Service
Hewlett-Packard S.A.
39 Rue Veyrot
P.O. Box 365
1217 Meyrin 1
Geneva, Switzerland
Telephone: [phone]
Fax: [phone]

Australi a , Ne w Zea l a nd
Sales and Servic e
Hewlett-Packard Ltd.
P.O. Box 221
31-41 Joseph Stre et
Blackburn, Victoria 3130
Telephone: [phone]
Fax: [phone]

Canada
Service Center
Hewlett-Packard Ltd.
11120 178 Street
Edmonton, Alberta T5S 1P2
Canada
Telephone: [phone]
Fax: [phone]

Canada
Sales and Service
Hewlett-Pac ka rd (Canada) Ltd.
5150 Spectrum Way
Mississauga, Ontario L4W 5G1
Canada
Telephone: [phone]
Fax: [phone]

Latin America
Hewlett-Packard Company
LAHQ Mexico City
Col. Lomas de Virreyes
11000 Mexico D.F.
Mexico
Telephone: [phone]
Fax: [phone]

Canada
Service Center
Hewlett-Packard Company
17500 Transcanada Highway
S. Serv Road
Kirkland, Quebec H9J 2X 8
Canada
Telephone: [phone]

United Kingdom
Sales and Service
Hewlett-Packard Ltd.
Cain Road
Amen Corner
Bracknell, Berkshire
RG12 1HN
United Kingdom
Telephone: [phone]

11

12

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Contents

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In This Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1. Getting Started with AMPS Test

About the Test Set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Getting Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

What’s Included with this Test Set . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Manual and Automatic Operation Modes . . . . . . . . . . . . . . . . . . . . . . 21

IBASIC programs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Maximizing the Accuracy of Your Measurements. . . . . . . . . . . . . . . . 22

Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

TX Power Temperature Compensation. . . . . . . . . . . . . . . . . . . . . . . 22

Display an FM Carrier Signal (Loopback Test). . . . . . . . . . . . . . . . . . 23

Connections for FM Carrier Loopback Test . . . . . . . . . . . . . . . . . . . 23

Get Started with the Test Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Preparing the Test Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Generate an FM Carrier Signal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Analyzing an FM Carrier Signal. . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

What to Do Next. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table of Contents

Table of Contents

2. Testing AMPS Base Stations

AMPS Tests You Can Perform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

What You Need to Know to Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Connecting the Test Set to Your Base Station. . . . . . . . . . . . . . . . . . . 32

Compensa ting for Signal Losses and Ga ins in the Test Setup . . . . . . 33

Transmitter Frequency Error/Offset and Power Test. . . . . . . . . . . . . 34

Prerequisites. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Begin Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Transmitter SAT Frequency and Deviation. . . . . . . . . . . . . . . . . . . . . 36

Prerequisites. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Transmitter Data Deviation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Prerequisites. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Transmitter Maximum Voice Deviation. . . . . . . . . . . . . . . . . . . . . . . . 40

Prerequisites. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Receiver Sensitivity (SINAD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Prerequisites. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Receiver Squelch Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Prerequisites. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

3. Utility Procedures

Beeper. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Beeper Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

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Contents

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Measuring Insertion Losses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Memory Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Memory Cards and Intialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Selecting the Oscillo sc op e’s Inp u t . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Selecting the Oscillo sc op e’s F ilte rs . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Triggering the Osc illo sc ope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Using the Marker. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Online Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Help Screen Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Ports: HP-IB, Serial and Parallel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

HP-IB Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Serial Ports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Parallel Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Printing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Configuring the Test Set for Printing . . . . . . . . . . . . . . . . . . . . . . . . 61

Printing a Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Measuring Swept Return Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Tracking Generator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Using the Tracking Generator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

User Keys. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Displaying the Pre-assigned Local User Keys . . . . . . . . . . . . . . . . . 66

Assigning a Local User Key. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Assigning a Global User Key. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

To Release a User Key Assignment. . . . . . . . . . . . . . . . . . . . . . . . . . 67

Using Channel Numbers to Set Analyzer and Generator Frequencies68

RF Chan and Tune Freq Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Measuring AC Level and DC Level. . . . . . . . . . . . . . . . . . . . . . . . . . 70

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In This Manual

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What is Discussed This Manual

This manual explains how to use the HP 8935 to manually test an
AMPS base station.

This document presents a step-by-step approach to AMPS base station
testing using the Test Set, including what you need to know before you
can start testing.

What is Not Discussed in this Manual

• General operation of the Test Set.
Changing display screens and their associated controls is discussed

in the Reference Guide (HP part number E6380-90019).

• Detailed operation of the Test Set’s spectrum analyzer and
oscilloscope.

Although there are basic ex planati ons in thi s manual , more deta il is
provided in the Reference Guide concerning the various control
menus and fields available.

• How to control your base station, switch system, or any other
software or hardware associated with your cell site equipment.

In This Manual

In This Manual

Each manufacturer and cellular service provider has their own cell
site control and base station configuration pro cedures that go beyond
the scope of this documentation.

• How to perform IBASIC programming operations, such as writing,
editing, copying, or cataloguing programs.

Programming the Test Set is expl ained i n the Pr ogramming Manual
(HP part number E6380-90018), and the IBASIC language is
explained in the HP Instrument BASIC User’s Handbook (HP part

number E 2083-90005).

Conventions Used in This Manual

The following conventions are used throughout this manual to help
clarify instructions and reduce unnecessary text:

Test Set refers to the HP 8935.
Test Set keys are indicated like this:
Test Set screen information, such as a measurement result or an error

message, is shown like this: TX Power 7.21 W

Preset

15

Which Document is

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Required?

Table 1 Document Navigation

Document Part Number Usage

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

CDMA Application
Guide

AMPS Application Guide E6380-90017 Use this manual for makin g AMPS base stat ion

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

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

Assembly Level Repair
Guide

E6380-90016 Use this manual for basic CDMA m easure ments

and for getting started with the Test Set.

measurements.

and general operation information about the Test
Set.

learning ho w to program the Tes t Set .

E6380-90015 Use this manu al to perfor m calibra tion o n th e

Test Set and for gene r al serv ice info rmat io n.

16

1 Getting St arted wi th A MPS T es t

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This chapter introduces you to the HP 8935 CDMA Cellular/PCS Base
Station Test Set and its AMPS functions. For information on other
functions in the Test Set, see “Which Document is Required?” on page

18. To proceed immediately to the test procedures, see “AMPS Tests

You Can Perform” on page 30.

Getting Started with AMPS

Chapter 1

Test

17

Getting Started with AMPS Test

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About the Test Set

About the Test Set

Product Description

This Test Set helps you install, commission, and maintain AMPS base
stations. It also allows you to test CDMA base stations. (This guide
discusses AMPS testing. For more information about CDMA testing,
refer to the CD MA Base Station Tests Applications Guide.)

The Test Set contains an RF signal generator, RF analyzer, AF
analyzer, and AF generator to test AMPS base stations. The following
tools are also included:

Code Domain Analyzer
CDMA Analyzer
CDMA Generator
Spectrum Analyzer

Batteries

Power Meter
Oscilloscope
AC/DC Voltmeter
IBASIC controller

There are two methods the Test Set uses to back up its RAM. One is a
set of two AA batteries mounted inside 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.

Failure to take prompt action may result in loss of RAM data including
IBASIC programs and SAVE/RECALL states stored in the RAM.

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
screwdriver.

3. Remove the rear cover.

(R)

18 Chapter 1

4. Replace the AA batteries. Do not use rechargeable batteries.

5. Replace the rear panel.

Getting Help

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Getting Started with AMPS Test

About the Test Set

If you have problem s using thi s Test Set, and ca nnot find the s oluti on in
these documents or the help screens, please use one of the following
contacts:

Your local or regional sales office (see "Regional Sales and Service

Offices" o n page 12)

U.S. Call Center: 800 542-4844
Korea HP Direct: (82 /2 ) 769-0800
Canada H P Direct: [phone]
European Call center: [phone]
Test and Measurement Organization on the web:

http://www.tmo.hp.com/

Getting Started with AMPS

Test

Chapter 1

Chapter 1 19

Getting Started with AMPS Test

Main Menu

About the Test Set

What’s Included with this Test Set

The equipment commonly shipped with the base Test Set is listed
below. Options that you order with your Test Set may change this list.

Test Set
Documentation:

• CDMA Applications Guide

• CD-ROM with the above listed manual, AMPS Base Station Tests

Applicatio n s Gu ide, Assembly Level Repair Man u al,

Programmer’s Guide, and HP 8935 Referenc e Gu ide in Adobe™

Acrobat Re ade r format (.pdf) .
Power cord
Cover for the front panel of the Test Set

20 Chapter 1

Manual and Automatic Operation Modes

Main Menu

Manual and Aut omat ic Op er at ion Mod es

You can operate the Test Set in either of two modes: manual or
automatic. Controlling the Test Set with the keypad is manual
operation. Controlling the Test Set with a program is automatic
Operation.

Use manual mode when you want to control the Test Set with the front
panel. Manual operation is described in this document.

Use automatic mode when you want to control the Test Set with its
internal IBASIC controller . To use the Test Set in auto matic mode, you

must load an IBASIC program into the Test Set’s memory.

IBASIC programs

You can obtain an IBASIC program in two ways: either write it
yourself, or purchase a software package from Hewlett-Packard. To
write programs yourself, refer to the Programmer’s Gu id e, included
with the Test Set’s documentation.

Getting Started with AMPS Test

Getting Started with AMPS

Many of HP’s software pa ckages are manu facturer-specific packages.
Manufacturer-specific software packages provide automated testing of
the manufacturer’s base station to greatly reduce test times and
provide test setup repeatabil ity. Once conf igured, the sof tware typica lly
controls both the base station and the Test Set and prompts the user to
make the required connections during testing. Test results can be
printed and/or saved to a file for later use. Contact your local HP Sales
Office to find out which software packages are currently available.

Chapter 1

Test

Chapter 1 21

Getting Started with AMPS Test

Main Menu

Maximizing the Accuracy of Your Measurements

Maximizing the Accuracy of Your Measurements

This Test Set is designed to make highly accurate measurements.
However, to ensure that you have the most accurate measurements
available, you can perform the following tasks:

Calibration

You should calibrate the Test Set whenever you change or add an
internal assembly. You may want to calibrate when you upgrade
firmware. See the Assembly Level Repair Manu al fo r calibration
procedures.

TX Power Temperature Compensation

The Test Set is internally compensated. However, power measurement
calibration can be optimized for temperature changes using the
TX Pwr Zero field on the RF ANALYZER screen. The new calibration
factors are stored in RAM until the next time the routine is used.

To have the Test Set zero the TX Power measurement automatically
when needed, set the Auto Zero field on the RF ANALYZER screen to

Auto

. During operation, the Test Set will temporarily halt the TX
Power measurement as it is calibrated. This can happen during a
measurement. If interrupting the measurement is a problem for your
test setup, set the Auto Zero field to Manual, and select
TX Pwr Zero whenever you want to manually calibrate the
measurement.

22 Chapter 1

Getting Started with AMPS Test

Main Menu

Display an FM Carrier Signal (Loopback Test)

Display an FM Carr ie r Si gnal (Loopback Test )

Since an AMPS base station is basically a continuous wave (CW) FM
signal, this section wil l guide you throug h the process of gene rating and
displaying an FM signal at a cellular band frequency. It is intended to
make you feel more comfortable with using the Test Set. If you are
ready to begin testing, proceed to Chapter 2.

NOTE In the following operating example, you enter a common frequency for

the RF generator and RF analyzer to create and view the T est Set’s own
signal. However, typical AMPS base station testing uses channel
assignments with different transmit and receive frequencies. This is
explained further in "Using Channel Numbers to Set Analyzer and

Generator Frequencies" on page 68.

Connections for FM Carrier Loopback Test

Connect the Test Set in the following manner.

Figure 1-1 FM Carrier Loopback Test Connections

AUDIO OUT

MODULATION

DUPLEX OUT

HI LO

AUDIO

INPUT

MONITOR
OUTPUT

ANT IN DUPLEX

AUDIO IN

EXT SCOPE

TRIG IN

16X

CHIP CLOCK

19.6608
MHz OUT

VIDEO

OUT

CHIP CLOCK

1.2288

MHz OUT

BASEBAND OUT

QI

SYNC IN

EVEN

FRAME

TRIG/QUALIN10 MHz

SECOND

CLOCK

IN

REF OUT

REF IN

PARALLEL PORT

PARALLEL PORT

SERIA PORT

SERIA PORT

SERIA PORT

RF IN/OUT

RF IN/OUT

Getting Started with AMPS

Chapter 1

Test

Chapter 1 23

Getting Started with AMPS Test

Main Menu

Display an FM Carrier Signal (Loopback Test)

Get Started with the Test Set

Here are some guides for selecting screens and fields:
Use the knob to move the cursor ar ound the screen. Reverse video b oxes

indicate fields that can be selected.
To select a field on the screen, push the knob, or press the
Use the

RF Gen, RF Anl, and Spec Anl keys to access the RF GENERATOR,

RF ANALYZER, and SPEC ANL screens.
Selecting the titlebar at the top of the screen displays a list of screens

that can be immediately accessed when selected.

Preparing the Test Set

1. Plug in the Test Set.

2. Turn on the Test Set (or press
ANALYZER screen will be displayed.

3. Press the

Inst Config key.

4. Select RF Display, and set the field to Freq

5. Verify your connections. See “Connections for FM Carrier Loopback

Test” on page 23.

Generate an FM Carrier Signal

Refer to Figure 1-2.

Enter key.

Preset if it is already on). The CDMA

.

1. Press

2. Select CW RF Path and set it to Bypass

CDMA Gen to go to the CDMA GENERATOR screen.

. This shuts off the IQ

modulation normally used for CDMA testing.

3. Press the

RF Gen key to go to the RF GENERATOR screen.

4. Select RF Gen Freq and use the keypad to set the frequency to

850.000 M H z .

5. Sel e ct Amplitude and set the amplitude to 0 dBm.

6. Select Output Po rt and verify that the port is set to Dupl

.

7. Turn on FM modulation by positioning the curs or in the lower hal f of
the AFGen1 To field and pressing the

On/Off key.

The default FM deviation is 2.9 kHz. The default FM rate is

1.0 kHz.

24 Chapter 1