HP (Hewlett-Packard) 8935 User Manual

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

Main Menu

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

Main Menu

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

Main Menu

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

!

Main Menu

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

Main Menu

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

Main Menu

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

Main Menu

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

Main Menu

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

Main Menu

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

Main Menu

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

Main Menu

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

Main Menu

Contents

Main Menu

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

13

Contents

Main Menu

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

14

In This Manual

Main Menu

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

Main Menu

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

Main Menu

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

Main Menu

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

Main Menu

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

Getting Started with AMPS Test

Main Menu

Display an FM Carrier Signal (Loopback Test)

NOTE AF generators 1 and 2 are automatically turned off anytime you access

any of the CDMA screens (CDMA GENERATOR, CDMA ANALYZER,
CODE DOM). This prevents accidental addition of AM or FM when
generating a CDMA signal. If you accidentally access any of the CDMA
screens when testing an AMPS base station, any AM or FM you
specified on the RF GENERATOR screen will be turned off while on
that CDMA screen. Previously set AM and/or FM are automatically
turned back on when returning to the RF GENERATOR screen.

Figure 1-2 Setting Up the RF Generator

Enter 850 MHz

Enter 0 dBm

Turn on FM

Select DUPLEX

850.000000

0.0

2.9

kHz

Getting Started with AMPS

Chapter 1

Test

Chapter 1 25

Getting Started with AMPS Test

Main Menu

Display an FM Carrier Signal (Loopback Test)

Analyzing an FM Carrie r Signal

1. Press the RF Anl key to go to the RF ANALYZER screen.

2. Select Tune Freq and use the keypad to set the frequency to

850.000 MHz. Notice that the Frequency Error, TX Power, FM
Deviation, and AF Frequency for the signal are automatically
displayed .

Figure 1-3 Default Digital Measurements for the FM Carrier

3. Press the

4. The signal is displa ye d.

5. Sele ct Span and set it to 30.000 kHz to get a good view of the
modulated signal. See Figure 1-4.

Figure 1-4 FM Carrier Signal

Spec Anl key to go to the SPECTRUM ANALYZER screen.

26 Chapter 1

What to Do Next

Main Menu

Congratulations! You are now ready to begin testing your AMPS Base
Station. Proceed to Chapter 2, “Testing AMPS Base Stations,” on page

29.

Getting Started with AMPS Test

Display an FM Carrier Signal (Loopback Test)

Getting Started with AMPS

Test

Chapter 1

Chapter 1 27

Getting Started with AMPS Test

Main Menu

Display an FM Carrier Signal (Loopback Test)

28 Chapter 1

2 Testing AMPS Base Stations

Main Menu

Advanced Mobile P hone Sys te m (AM PS ) base sta tio ns fo r cellu lar telepho n e
systems are basical ly continuous wave (CW) FM voic e trans ceivers with some
control and data s ignal s for sys tem oper ation. This chapt er ex plains ho w to use
the Test Set to ma nually test the RF and AF perfo rma n ce o f the tr ans m itte r
and receiver portions of the base station.

Testing AMPS Base Stations

Chapter 2

29

Testing AMPS Ba s e Sta tions

Main Menu

AMPS Tests You Can Perform

AMPS Tests You Can Perform

The following tests are explained in this manual:

• "Transmitter Frequency Error/Offset and Power Test" on page 34.

• "Transmitter SAT Frequency and Deviation" on page 36.

• "Transmitter Data Deviation" on page 38.

• "Transmitter Maximum Voice Deviation" on page 40.

• "Receiver Sensitivity (SINAD)" on page 42.

• "Receiver Squelch Threshold" on page 45.

CAUTION Transmitter power (TX Power) can only be measured through the Test

Set’s RF IN/OUT port. Verify that the signal connected to this port does
not exceed the limits printed by the port.

If you hear a loud “warbling” sound from the Test Set, turn off your
transmitter immediately! This is the over-power alarm, warning that
instrument damage may occur. Caution: Turning the Test Set off at this
point does not protect the internal circuitry. Also, removing the cable
from the RF IN/OUT port without turning the transmitter off may
damage your transmitter or power amplifier (due to an impedance
mismatch).

The ANT IN port is only used for analyzing very low level signals
(≤60 mW). Never attempt to measure a transmitter’s power directly
using the ANT IN port, as instrument damage may occur.

The DUPLEX OUT port is only used to provide RF signals to the base
station’s receive port(s). It must not be connected to the base stations
transmit port or damage may occur to the Test Set.

30 Chapter 2

What You Need to Know to Begin

Main Menu

You need to know how to control the base station and the basic
operation of the Test Set before you can test your base station.

Test Set operation includes how to change control settings, how to
navigate between control screens, and how to change the uni ts used f or
any measurement or setting. Test Set operation and feature
descriptions are included in the Reference Gu id e.

Base station operation includes turning the transmitter on and off,
turning the SAT tone and data signals on and off, and knowing where
to connect test cables from the Test Set to your base station.

You also need to properly configure the Test Set for your test situation.
The following sections describe operations needed to simplify Test Set
operation and minimize measurement errors.

• Entering the known losses and/or gains in your test setup is
explained in "Compensating for Signal Losses and Gains in the Test

Setup" on page 33.

Testing AMPS Base Sta tions

What You Need to Know to Begin

• Measuring the signal loss through cables and other devices is
explained in "Measuring Insertion Losses" on page 51.

• Choosing to enter your base station’s transmit and receive
frequencies by channel number or by discrete frequencies is
explained in "Using Channel Numbers to Set Analyzer and

Generator Frequencies" on page 68.

Testing AMPS Base Stations

Chapter 2

Chapter 2 31

Testing AMPS Ba s e Sta tions

Main Menu

Connecting the Test Set to Your Base Station

Connecting the Test Set to Your Base Station

The connections shown in Figure 2-1 indicate a “generic” base station
using a test interface for audio test signals and a laptop computer
running a control program to control the base station. A power splitter
is used for testing the receiver ports. Although this is a common setup
for performing tests, aud io and RF co nnect ions to b ase sta tio ns and the
ways base stations are controlled vary among manufacturers.

Figure 2-1 Connections Between the Test Set and the Base Station

Audio

Out

Audio

In

PARALLEL PORT

TX Mod RX Audio

Audio Signal
Test Interface

ANT IN

(≤60mW)

DUPLEX OUT
(RF Gen Out)

AMPS BASE STATION

1

S

2

Power
Splitter

RF IN/OUT Port

(High Power RF Input)

side1_75.eps

Receive A

Receive B

Audio Test Signal
breakout port.

Laptop Running Control Program

32 Chapter 2

Local Control
Port

TX

Testing AMPS Base Sta tions

Main Menu

Compensating for Signal Losses and Gains in the Test Setup

Compensating for Signal Losses and Gains in the Test
Setup

Signal losses or gains through cables, splitters, combiners, connectors,
amplifiers, or coaxial switches must be accounted for to ensure
measurement accuracy. These values are entered in the I NSTRUMENT
CONFIGURE screen (press the Inst Config key).

Refer to "Measuring Insertion L osses" on p age 51 for infor mation about
measuring cable/system losses.

• Total losses/gains between the transmitter’s output and the Test
Set’s RF IN/OUT port are entered in the RF In/Out field. A
negative number (indicating a loss) causes the displayed TX power
measurement to be increased by the entered amount. A positive
number (indicating a gain) causes the RF analyzer to decrease the
displayed TX power measurement by the entered amount.

• Total losses between the Test Se t’s D UPLEX OUT port and the base
station’s receive port(s) are entered in the Duplex Out field as a
negative number (such as −1.2). The RF Generator will
automatically increase its level out of the DUPLEX OUT port by the
value entered to compensate for the loss.

Figure 2-2 Entering Test System Losses and Gains

Set the RF Level Offset
field to On.

On/Off

LS AMPS

Enter the loss or gain
between each port and the
base station.

Testing AMPS Base Stations

Chapter 2

Chapter 2 33

Testing AMPS Ba s e Sta tions

Main Menu

Transmitter Frequency Error/Offset and Power Test

Transmitter Frequency Error/Offset and Power Test

This test compares the measured c enter frequenc y of the base station t o
the AMPS channel standard. The resulting difference is the frequency
error (also called the frequency offset). The measurement can be
displayed in frequency units (Hz, kHz, MHz) or in parts per million
(ppm). Measurements are made with all modulation turned off.

The transmitter’s power can be measured any time the transmitter is
keyed, but may not be accurate unless all modulation is turned off.
Transmitter power may be specified by the manufacturer in units of
watts (W), milliwatts (mW), dBm, Volts (V), or millivolts (mV).

Prerequisites

The following conditions must be met before testing:

❒ The Test Set is turned on and Preset was pressed to establish a

known instrument state .

Begin Testing

❒ You have configured the Test Set for channel or frequency tuning as

necessary (see “Using Channel Numbers to Set Analyzer and

Generator F requencies” on page 68).

❒ You have specified any gains or losses in your test system (see

“Compensating for Signal Losses and Gains in the Test
Setup” on page 33).

1. Turn of f th e base station’s RF t ransmitter. A transmitter can be
damaged if it is not transmitting into a specified load, such as an
antenna, power amplifier, duplexer, or power meter with a 50Ω
input impedance.

2. Verify that the transmitter’s rated RF power (or the level out of the

power amplifier if applicable) does not exceed the level printed next
to the Test Set’s RF IN/OUT connector.

3. Connect the transmitter’s RF output to the Test Set’s RF IN/OUT
port.

4. Turn off any modulation signals to the base station.

• Turn off the SAT tone.

34 Chapter 2

• Turn off any data (digital) modulation signals.

• Turn off any audio (voice) modulation signals.

5. Press the

6. Enter the transmitter’s RF Channe l number.

RF Anl key to access the RF ANALYZER screen.

Testing AMPS Base Sta tions

Main Menu

Transmitter Frequency Error/Offset and Power Test

7. Turn on the transmitter. The TX Freq Error and TX Power
measurements are displayed.

Note: Disregard any values shown for FM Deviation and AF Freq at
this time.

Figure 2-3 Transmitter Frequency Error and Power Test Results

Chapter 2 35

Testing AMPS Base Stations

Chapter 2

Testing AMPS Ba s e Sta tions

Main Menu

Transmitter SAT Frequency and Deviation

Transmitter SAT Frequency and Deviation

This test measures the transmitter’s Supervisory Audio Tone (SAT)
frequency and deviation in the absence of any other modulating signal.

Prerequisites

The following conditions must be met before testing:

❏ The Test Set is turned on and Preset was pressed to establish a

known instrument state .

❒ You have configured the Test Set for channel tuning (see “Using

Channel Numbers to Set Analyz er and Generator
Frequencies” on page 68).

❒ You have specified any gains or losses in your test system (see

“Compensating for Signal Losses and Gains in the Test
Setup” on page 33).

Test Procedure

1. Turn of f th e base station’s RF t ransmitter. A transmitter can be

2. Verify that the transmitter’s rated RF power (or the level out of the

3. Connect the transmitter’s RF output to the Test Set’s RF IN/OUT

4. Turn off the voice modulation to the transmitter.

5. Turn off data modulation to the transmitter.

6. Enable SAT transmission.

7. Press

damaged if it is not transmitting into a specified load, such as an
antenna, power amplifier, duplexer, or power meter with a 50Ω
input impedance.

power amplifier if applicable) does not exceed the level printed next
to the Test Set’s RF IN/OUT connector.

port.

Shift, RF Anl (AF Anl) to access the AF ANALYZER screen.

36 Chapter 2

Testing AMPS Base Sta tions

Main Menu

Transmitter SAT Frequency and Deviation

8. Set the Filter 2 field to 6 kHz BPF. This helps remove unwanted
noise.

6kHz BPF

9. Press the

RF Anl key to access the RF ANALYZER screen.

10.Enter the transmitter’s channel number in the RF Channel field.

11.Turn on the transmitter. The FM Deviation an d AF Freq for the
SAT are displayed (as well as Frequency Error and TX Power).

Figure 2-4 SAT Frequency and Deviation Test Results

SAT Deviation

SAT Frequency

Testing AMPS Base Stations

Chapter 2

Chapter 2 37

Testing AMPS Ba s e Sta tions

Main Menu

Transmitter Data Deviation

Transmitter Data Deviation

This test measures the transmitter’s digital data deviation in the
absence of any other modulating signal.

Prerequisites

The following conditions must be met before testing:

❒ The Test Set is turned on and Preset was pressed to establish a

known instrument state .

❒ You have configured the Test Set for channel tuning (see “Using

Channel Numbers to Set Analyz er and Generator
Frequencies” on page 68).

❒ You have specified any gains or losses in your test system (see

“Compensating for Signal Losses and Gains in the Test
Setup” on page 33).

Test Procedure

1. Turn of f th e base station’s RF t ransmitter. A transmitter can be

2. Verify that the transmitter’s rated RF power (or the level out of the

3. Connect the transmitter’s RF output to the Test Set’s RF IN/OUT

4. Turn off voice modulation to the transmitter.

5. Turn off the SAT to the transmitter.

6. Turn on the data modulation to the transmitter.

7. Press

damaged if it is not transmitting into a specified load, such as an
antenna, power amplifier, duplexer, or power meter with a 50Ω
input impedance.

power amplifier if applicable) does not exceed the level indicated
next to the Test Set’s RF IN/OUT connector.

connector.

Shift, RF Anl (AF Anl) to access the AF ANALYZER screen.

38 Chapter 2

8. Set Filter 1 to <20Hz HPF.

Main Menu

9. Set Filter 2 to >99kHz LP.

<20Hz HPF

>99kHz LPF

Testing AMPS Base Sta tions

Transmitter Data Deviation

10.Press the

RF Anl key to access the RF ANALYZER screen.

11.Enter the transmitter’s channel number in the RF Channel field.

12. Turn on the transmitter. The FM Deviatio n from the data is
displayed.

Figure 2-5 Data Deviation Test Results

Data Dev ia ti o n

Testing AMPS Base Stations

Chapter 2

Chapter 2 39

Testing AMPS Ba s e Sta tions

Main Menu

Transmitter Maximum Voice Deviation

Transmitter Maximum Voice Deviation

This test measures the tr ansmitter ’s maximum FM Devi ation by a voice
signal in the absence of any other modulation signal.

Prerequisites

The following conditions must be met before testing:

❒ The Test Set is turned on and Preset was pressed to establish a

known instrument state .

❒ You have configured the Test Set for channel tuning (see “Using

Channel Numbers to Set Analyz er and Generator
Frequencies” on page 68).

❒ You have specified any gains or losses in your test system (see

“Compensating for Signal Losses and Gains in the Test
Setup” on page 33).

Test Procedure

1. Turn of f th e base station’s RF t ransmitter. A transmitter can be

2. Verify that the transmitter’s rated RF power (or the level out of the

3. Connect the transmitter’s RF output to the Test Set’s RF IN/OUT

4. Connect the transmitter’s audio modula tion (v oice) input to the T es t

5. Enable the transmitter’s audio (speech) modulation.

6. Turn off any modulatio n sig nals to the base station other than audio.

7. Press the

8. Enter the transmitter’s channel number in the RF Channel field.

damaged if it is not transmitting into a specified load, such as an
antenna, power amplifier, duplexer, or power meter with a 50Ω
input impedance.

power amplifier if applicable) does not exceed the level indicated
next to the Test Set’s RF IN/OUT connector.

port.

Set’s AUDIO OUT port.

RF Anl key to access the RF ANALYZER screen.

40 Chapter 2

Testing AMPS Base Sta tions

Main Menu

Transmitter Maximum Voice Deviation

9. Press the RF Gen key to access the RF GENERATOR screen.

10. Set the AFGen1 To field to Audio Out, and a level of 50 mV.

Audio Out

Initi ally 50 mV

11. With the cursor still positioned in front of the level setting
(50 mV), press the

Incr Set key and enter 20 dB using the keypad.

12. Turn on the transmitter.

13. With the cursor still positioned in front of the level setting (50 mV)
press the up-arrow key once to increment the level by 20 dB.

14.Read the FM deviation.

15.Vary the AFGen1 Freq from 300 Hz to 3 kHz and observe the FM
deviation at each frequency. Deviation must not exceed the rated
system spec ifi cation of ±12 kHz at an y time.

Watch the
FM Deviation
while...

Increment
AFGen1
level by
20 dB.

...changing
the AFGen1
Freq from
300 Hz to
3 kHz.

Testing AMPS Base Stations

Chapter 2

Chapter 2 41

16.Disconnect the cable to the transmitter’s audio modulation input
(connected in step 4) to reduce the chance of errors in your next
transmitter test.

Testing AMPS Ba s e Sta tions

Main Menu

Receiver Sensitivity (SINAD)

Receiver Sensit iv ity (SIN AD)

This test measures the receiver’s ability to demodulate voice signals
from very low RF carri er levels.

Prerequisites

The following conditions must be met before testing:

❒ The Test Set is turned on and Preset was pressed to establish a

known instrument state .

❒ You have configured the Test Set for channel tuning (see “Using

Channel Numbers to Set Analyz er and Generator
Frequencies” on page 68).

❒ You have specified any gains or losses in your test system (see

“Compensating for Signal Losses and Gains in the Test
Setup” on page 33).

Test Procedure

1. Turn off the base station’s transmitter.

2. Turn the base station’s radio squelch, data, and SAT off.

3. Connect the base station r ec ei ver’s inputs to the Test Set’ s DUPLEX

4. Connect the receiver’s audio output to the Test Set’s AUDIO IN

5. Press

OUT port .

port(s). Unless the receiver’s audio out amplifier is not referenced to
chassis ground, you should only connect to the AUDIO IN - HI port.
For floating output amplifiers, see the HP 8935 Reference Manual
for information on using the AUDIO IN - LO connection.

CDMA Gen to access the CDMA GENERATOR screen.

42 Chapter 2

Testing AMPS Base Sta tions

Main Menu

Receiver Sensitivity (SINAD)

6. Set the CW RF Path field to Bypass. This turns off the IQ
modulation used for CDMA tests.

Set to Bypass.

7. Press

SHIFT, RFAnl (AF Anl) to access the AF ANALYZER screen.

Bypass/IQ

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

9. Set the Filter 1 field to C Message.

Set to Audio In.

Set to C Message.

Audio In

C Message

Testing AMPS Base Stations

Chapter 2

Chapter 2 43

10. Press the

RF Gen key to access the RF GENERATOR screen.

11. Change the lower audio measurement to SINAD. This is done by
selecting the existing measurement and choosing SINAD from a list
of choices.

12. Set the AFGen1 To field to FM and turn it on (2.9 kHz) using the

On/Off key.

13. Enter the transmitter’s channel number in the RF Channel field.

Testing AMPS Ba s e Sta tions

Main Menu

Receiver Sensitivity (SINAD)

14. Set an initial RF g ener ato r leve l i n the Amplitude field. This value

Enter the
RF Chan­nel number.

Set an initial
level of

−90 dBm.

depends on the sensitivity of the receiver; but −90 dBm should be a
good starting point. At this point you should be able to turn the Test

Set’s Volume knob clockwise and hear a 1 kHz tone from the Test
Set’s speaker.

Set to
SINAD.

Turn on FM
modulation
for the RF
Generator.

15. Set the Amplitude field to increment in 1 dB units. To do this,
position the cursor in front of the Amplitude field, press the

Incr Set key, and enter 1 dB using the keypad.

16. With the cursor front of the field, turn the knob to decrease the
Amplitude setting until the desired SINAD measurement is
displayed (commonly 12 dB). You should hear the 1 kHz tone get
noisy as you approach the 12 dB SINAD reading.

Figure 2-6 SINAD Test Results

As you decrease the
RF generator
amplitude into your

receiver....

...the SINAD
readin g goes
down and the
signal through
the Test Set’s
speaker gets
noisy.

44 Chapter 2

Receiver Squelch Threshold

Main Menu

This test determines the RF Signal level where the receiver squelches
(switch e s o ff) the audio output.

Prerequisites

The following conditions must be met before testing:

❒ The Test Set is turned on and PR E SET was press ed to establish a

known instrument state.

❒ You have pressed the Preset key to establish a known instrument

state.

❒ You have configured the Test Set for channel tuning (see “Us i ng

Channel Numbers to Set Analyzer and Generator
Frequencies” on page 68).

❒ You have specified any gains or losses in your test system (see

“Compensating for Signal Losses and Gains in the Test
Setup” on page 33).

Testing AMPS Base Sta tions

Receiver Squelch Threshold

Test Procedure

1. Turn off the base station’s transmitter.

2. Turn the base station’s data and SAT off.

3. Connect the base station r eceive r’s in puts to the Test Set’s DUPLEX

4. Connect the receiver’s audio output to the Test Set’s AUDIO IN

5. Press

OUT port.

port(s). Unless the receiver’s audio out amplifier is not referenced to
chassis ground, you should only connect to the AUDIO IN - HI port.
For floating output amplifiers, see the HP 8935 Reference Manual
for information on using the AUDIO IN - LO connection.

CDMA Gen to access the CDMA GENERATOR screen.

Testing AMPS Base Stations

Chapter 2

Chapter 2 45

Testing AMPS Ba s e Sta tions

Main Menu

Receiver Squelch Threshold

6. Set the CW RF Path field to Bypass. This turns off the IQ
modulation used for CDMA tests.

Set to Bypass.

7. Press

SHIFT, RFAnl (AF Anl) to access the AF ANALYZER screen.

Bypass/IQ

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

9. Press the

RF Gen key to access the RF GENERATOR screen.

10.Set the AFGen1 To field to FM and set it to 8 kHz deviation.

11.Enter the transmitter’s channel number in the RF Channel field.

12.Set the Atten Hold field to On

. The prevents the Test Set from
changing its internal attenuators during the test to prevent
erroneous squelch interruption.

46 Chapter 2

Testing AMPS Base Sta tions

Main Menu

Receiver Squelch Threshold

13.Set an initial RF generator level in the Amplitude field. This value
depends on the sensitivity of the receiver; but −90 dBm should be a
good starting point. At this point you should be able to turn the Test

Set’s Volume knob clockwise and hear a 1 kHz tone from the Test
Set’s speaker.

Enter the
RF channel
number.

Turn on FM
modulation
for the RF

Set a initial
level o f

−90 dBm.

8.00

On/off

generator
and set to
8 kHz.

Set to On.

14.Set the Amplitude field to increment in 1 dB units. To do this,
position the cursor in front of the Amplitude field, press the

Incr Set key, and enter 1 dB using the keypad.

15.With the cursor in front of the Amplitude field, turn the knob
counterclockwise to decrease the Amplitude setting until the
received audio is no longer heard on the Test Set’s speaker (or until
the AC Level reading drops suddenly). The RF amplitude at which
the audio signal is no longer output is the squelch threshold.

Testing AMPS Base Stations

Chapter 2

Chapter 2 47

Testing AMPS Ba s e Sta tions

Main Menu

Receiver Squelch Threshold

48 Chapter 2

3 Utility Procedures

Main Menu

This chapter contains procedures and instructions that will help you
make the most efficient use of your Test Set.

Utility Procedu re s

Chapter 3

49

Utility Procedures

Main Menu

Beeper

Beeper

The beeper notifies you when a message is displayed. Since a message
may be removed from the screen before you notic e it, it is better to leave
the beeper on to alert you to errors during operation.

The beeper’s volume setting is retained when the instrument is turned
off.

Beeper Control

1. Press the Inst Config key to go to the INSTRUMENT CONFIGURE

2. Select Beeper.

3. Choose from Off, Quiet, or Loud.

screen.

50 Chapter 3

Measuring Insertion Losses

Main Menu

To make accurate power and receiver measurements, the signal loss
through the cables or other devices used in your test setup must be

known and entered into the Test Set’s INSTRUMENT CONFIGURE
screen to compensate for these losses.

Signal losses are measured using a built-in automated routine that
runs on the Test Set’s IBASIC controller. Losses can be calibrated at a
discrete (single) frequency or over a frequency range. This is one
routine included in a set of utility procedures called the RF TOOLS.

During the test, a calibrated signal goes through two 6-dB
attentuators/pads (such as Mini-Circuits model NAT-6-60) and a short
type-N male-to-male cable to establish a known reference point. The
Test Set then prompts you to connect the device under test to measure
the additional loss through that device. (The pads and cable are not
part of the standard equipment shipped with the Test Set.)

Utility Procedures

Measuring Insertion Losses

Figure 3-1 shows how to load and run the RFTOOLS routines and

select the desired insertion loss test.

Figure 3-1 Loading and Running the Insertion Loss Test

1 Select ROM.

Select RFTOOLS.

2

3

Select Run Test.

When the screen below appears.......

...use the knob to move the cursor and
select either Discrete Freq Insertion
Loss or Swept Insertion Loss. When
run, the test prompts you to enter the
necessary test frequency information
and displays setup diagrams. Make the
indicated connections and follow
instructions as you are prompted by the
prog ram.

Utility Procedu re s

Chapter 3

Chapter 3 51

Utility Procedures

Main Menu

Memory Card s

Memory Cards

The slot on the front of the Test Set is used for memory cards. The slot
is used for the following:

• Storage of save/recall registers

• Loading of software (either HP or self-written)

• Collecting data (only when using software)

• Upgradin g fi rmware or softw are

Memory Cards and Intialization

There are several types of memory cards available, and the following
cards are used with the Test Set:

• SRAM: used for save/recall and data storage

• Flash ROM: used when upgrading firmware

• OTP (One-Time Programmable): use d for HP software
Flash ROM cannot be used for collecting data and Save/Recall.
Data cannot be loaded on Flash RAM and OTP cards with the Test Set’ s

memory card slot.
SRAM can be initialized with the Test Set.

Initializing SRAM Cards for Save/Recall and Data
Collection

1. Insert the SRAM card into the slot. If the card is uninitialized, a
message will appear at the top of the display.

2. Press

3. Using the knob, locate the FORMAT CA RD field.

4. Select the FORMAT CARD field. A prompt will appear at the top of
the display. Pressing

Shift and IO Conf g to display the I/O CONFIGURE screen.

Yes will erase and initialize the card.

52 Chapter 3

Oscilloscope

Main Menu

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 (SCOPE) is provided from various sources

including direct inputs to the Audio Input and Modulation Input
connectors. Oscilloscope functions are accessed from the AF Anl and
SCOPE screens.

Figure 3-2 Inputs and Filters for the Oscilloscope

Utility Procedures

Oscilloscope

FM Demod
AM Demod
SSB Demo d

AUDIO IN connector

Analog Modulation In

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
Audio Monitor

Out connector

Chapter 3 53

Utility Procedu re s

Chapter 3

Utility Procedures

Main Menu

Oscilloscope

Selecting the Oscil loscope ’s Input

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

2. Select the AF Anl Input field. A list of choices appears.

3. Select the desired input to the scope:

• FM Demod for FM demo dulated audio from inpu t signals

connected to the RF IN/OUT or ANT IN connectors.

• AM Demod 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 r ear panel MODULATION

INPUT 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 AUDIO OUT connector.

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

Selecting the Oscilloscope’s Filters

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

2. Select the Scope To field. A list of choices should appear.

3. Select the desired filtering for the signal:

• Input if you want no filtering (dc coupled)

• Filters to route the audio to the oscill oscope after passing through

filters 1 and 2. (ac co u pled)

• De-emp to route the audio to the oscilloscope after passing

through filters 1 and 2, and the de-emphasis circuitry.(ac coupled)

• Notch to route the audio to the oscilloscope after passing through

Filters 1 and 2, the de-emphasis circuitry, and notch filter
circuitry. (ac coupled)

54 Chapter 3

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 tr iggered using the Trigger menu. Select this menu

with the following procedure:

Utility Procedures

Oscilloscope

1. Press

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

2. Select the Controls field, then choose Trigger from the list of
choices.

Chapter 3 55

Utility Procedu re s

Chapter 3

Utility Procedures

Main Menu

Oscilloscope

Using the Marker

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 using the Marker menu. Select this menu
with the following procedure:

1. Press

2. Select the Controls field, the choose Marker from the list of
choices.

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

56 Chapter 3

Online Help

Main Menu

Utility Procedures

Online Help

The Test Set contains help screens which briefly identify the most
commonly used features of the Test Set.

Access the help screens by pressing the
the Help Topic of interest.

Pressing the

Prev key allows you to switch between the HELP screen

and the previous screen you had accessed. This is particularly useful
when you are following a procedure described in the HELP screen.

Help Screen Display

Figure 3-3 Help Screen Display

Help key. Use the knob to select

Chapter 3 57

Utility Procedu re s

Chapter 3

Utility Procedures

Main Menu

Ports: HP-IB, Serial and Parallel

Ports: HP-IB, Serial and Parallel

There are three types of data ports on the Test Set: HP-IB, Serial, and
Parallel . T h ey e ach h ave specific purpo ses.

HP-IB Port

This port is provided on the Test Set for IEEE 488.2 communications. I t
is used to control the Te st Set wi th a n externa l I BASIC contro ll er , or to
control other HP-IB equipped devices.

This port can be used with an external programming device when
writing programs, although it is also common to program the Test Set
using a serial port.

The default address of the HP-IB port is 14. This is commonly used in
IBASIC programs. An example command providing output to the port is
OUTPUT 714;”*RST”, which presets the Test Set.

Serial Ports

It has two modes, which correspond to modes useful when
programming the Test Set. Talk&Listn is the normal mode. Use
Control only when you need to control HP-IB instruments external to
the Test Set.

Controlling the HP-IB Port

1. Press Shift, then the Inst Config (I/O Config) key to display the I/O
CONFIGURE screen.

2. Set the address of the HP-IB port with the HP-IB Adrs field.

3. Use the Mode field to set the mode to either Talk&Listn or
Control.

Three serial ports are available on the Test Set. Port 9 is used for
printing, IBASIC c ontr ol a nd data c ommunicat ions. Serial ports 10 a nd
11 are used only for data communications from IBASIC.

Configuring Serial Ports

All serial ports are configured via the I/O CONFIGURE screen. Baud
Rate, Parity, Data Length, Stop Length and Flow Control are all
configured in this screen. Additionally, port 9 can be configured for
IBASIC control in this screen.

58 Chapter 3

1. Press
screen.

2. Select Serial Port to choose the port you want to configure.

Shift, then Inst Config (I/O Config) to go to the I/O CONFIGURE

Utility Procedures

Main Menu

Ports: HP-IB, Serial and Parallel

3. Change the settings for the port as desired.

NOTE Do not turn Flow Control on (set Flow Cntl to “Hardware” in the I/O

CONFIGURE screen) for the serial port until you have a device
attached to the port that can respond to the flow control
communications.

Example: Assume you have a printer attached to Serial Port 9. Power is
off to the printer. Before you start to run any IBASIC software (for
example, the RFTOOLS program), youmust make sure the printer is
attached and power is on to the printer.

Using Serial Ports for Printing

Serial Port 9 is the only serial port that can be used for printing. See

“Printing” on page 61.

1. If you want to change the serial port configuration, see “Configuring

Serial Port 9 for IBASIC Communications” on page 59. It is not

necessary to change the Serial_9 In field.

2. Press

Shift, then Print (Printer Config) to display the PRINTER

CONFIGURE screen.

3. Select Printer Port. Choose Serial 9 to direct the output to
Serial Port 9.

4. Press

Print to print the currently displayed screen.

Configuring Serial Port 9 for IBASIC Communica tions

The internal connection to Serial Port 9 is controlled in the I/O
CONFIGURE screen. The port has two purposes with IBASIC:

• Inst: Serial Port 9 is connected to a terminal (e.g. a PC running
Windows Terminal program). IBASIC commands are input from the
terminal and are used to control the Test Set.

• IBASIC: Serial Port 9 is c onnec ted to a device that can communicate
with an IBASIC program already running inside the Test Set.
Typically used for input/output to a PC or other device.

1. Press
screen.

2. Select Serial_ 9 In to toggle between Inst and I BASIC.

Shift, then Inst C onfig (I/O Config) to go to the I/O CONFIGURE

Chapter 3 59

Configuring Serial Ports 1 0 a nd 11

Serial Ports 10 and 11 are only configured via IBASIC commands. See
the Programmer’s Guide for commands which control these ports.

Utility Procedu re s

Chapter 3

Utility Procedures

Main Menu

Ports: HP-IB, Serial and Parallel

Paralle l P or t s

There are two parallel ports on the Test Set.
Parallel Port 15 is the only pa rallel port tha t can be used for p rinting. It

can be selected in the PRINTER CONFIGURATION screen.
Both para llel ports (Port 15 an d Port 16) ma y be u se d fo r controlling a

base station. The port can be put in an input or an output mode. The
data is then written or read under IBASIC control. When in either of
these modes, the printing function on Parallel Port 15 is disabled.

60 Chapter 3

Printing

Main Menu

You can print from the Test Set via Parallel Port 15, Serial Port 9, or
the HP-IB port.

Note that data collection is not the same as printing. Data collection
can only be done from a software program.

Configuring the Test Set for Printi ng

1. Press Shift, then Print (Printer Config) to display the PRINTER
CONFIGURE screen.

2. Select the Model field and choose the printer that most closely
matches your printer.

3. Select the Printer Po rt field and choose the port you will connect
the printer to. If necessary, use the I/O CONFIGURE screen to set
up addresses a n d co mmunication m o des.

Utility Procedures

Printing

a. SERIAL PORT 9: This is the uppermost serial port. Configuration

b. HP-IB: The HP-IB address (HP-IB Adrs) is set to printer address

c. PARALLEL PORT: There are two ports available. Port 15 (the

4. Connect the proper cable to the connector you selected.

• SERIAL PORT: standard NULL MODEM cable.

• HP-IB: HP-IB cable (such as HP 10833B)

• PARALLEL PORT: parallel cable

5. Change the FF (form feed) and Lines/Page as needed.

Printing a Screen

1. Configure the Test Set for Printing.

2. Go to the screen you want to print.

3. Press the
(Optional).

4. Press the

5. To cancel the print, go to the PRINTER CONFIGURE screen and
select Ab or t Pr in t.

defaults are 9600, none, 8, 1, Xon/Xoff.

701. Enter this number as 01. Set Mode to CONTROL. (The
default address 14 is reserved for an external controller.)

printer port) is the uppermost port.

Hold key if you want to temporarily stop the measurement.

Utility Procedu re s

Print key. Data will be sent to the printer.

Chapter 3

Chapter 3 61

Utility Procedures

Main Menu

Measuring Swept Return Loss

Measuring Swe pt Ret urn Loss

This procedure measures the return loss (VSWR) of an antenna using

an IBASIC program that is in the Test Set’s memory. An external
directional bridge must be provided (such as an Eagle RLB 150X5
Option N5A or equivalent).

Press the
the instructions illustrated on the following pages.

Figure 3-4 Loading and Running the Return Loss Program

Select RFTOOLS.

Select Run Test.

Menu key to access the SOFTWARE MENU screen, and follow

Select ROM.

62 Chapter 3

Use the knob to move the cursor and
select Swept Return Loss.

(Next Page)

Utility Procedures

Main Menu

Measuring Swept Return Loss

Figure 3-5 Entering Swept Return Loss Measurement Information

Enter the Start an d Stop Frequency
values for the measurement.

The Max expected loss value is used to
determine the graphics scaling when the
measurement is displayed.

The DUPLEX OUT level is adj u st able
to reduce the RF level used when mea­suring the loss of sensitive devices, and
to minimize the amount of transmitted
power during the test (if necessary).

Select Begin Tst (

k1) to continue.

Figure 3-6 Swept Return Loss Measurement Connections

Two 6 dB attenuators (pads), two sho rt
cables, and the return loss bridge are
used to establish a calibration refer­ence without the device under test
connected. Press Proceed (

k1) to co n-

tinue.
As indicated by the NOTE on the

drawing, your return loss bridge may
be marked differently than shown.

Chapter 3 63

When measuring the swept return lo ss
of a transmission line that is not ter­minated at an antenna, terminate the
line into a 50Ω load.

After connecting your device under
test, press Proceed (

k1) to make the

measurement.

Device under test

Utility Procedu re s

Chapter 3

Termination

Utility Procedures

Main Menu

Measuring Swept Return Loss

The plot in Figure 3-7 is for a cellular band antenna, swept from
800 MHz to 999 MHz. The p lot ( and the text above it ) indicates that the
maximum return loss is at 885.4 MHz. This is the point where the
antenna is radiating the maximum amount of signal being fed into it
from the return loss bridge, and therefore the Test Set is receiving the
least amount of reflected (returned) energy back.

Figure 3-7 Swept Return Loss Measurement Results

Proceed to the run the

test again or to select a
different test.

Save Plot to an
initial iz e d writeable PC
card. (See "Memory

Cards" on page 52.)

Perform a Screen
Dump to print the screen
to a connected printer.
(See "Printing" on page

61.)

64 Chapter 3

Tracking Generator

Main Menu

The tracking generator is typically used for measuring return loss and
insertio n lo ss. It also allow s fo r qu ick and accur at e ch aracterization o f
filters, duplexers, combiners, and RF to IF conversions. Broadband RF
devices can be characterized with single sweeps due to the full-span
sweep capability to 1 GHz. The tracking generator also includes
amplitude and frequency of fset. Output from the t racking generat or are
provided at either the RF IN/OUT or DUPLEX OUT connector.

Using the Tracking Ge nerato r

To measure return loss, see "Measuring Swept Retu rn Loss" on page 6 2.
To measure insertion loss, see "Measuring Inserti on Losses" on page 51.

Features of the tracking generator are listed below.

• Sweep: the start and stop frequencies of the sweep are determined
by the spectrum analyzer’s Main menu. The Span determines the
band, and Center Freq defines the midpoint of the sweep.

Utility Procedures

Tracking Generator

• Offset Freq: sets the difference between the instantaneous
frequency of the tracking generator and the center frequency of the
spectrum analyzer. This value can be positive or negative.

• Amplitude: sets the amplitude of the signal.

• Norm/Invert: With Norm
to high frequencies. With Invert, it sweeps from high to low
frequencies.

NOTE The offset function is useful when looking at frequency translating

devices, or anytime you need to sweep around a frequency while
analyzing another. During normal operation, offset is set to 0.00.

Figure 3-8 Spectrum Analyzer with Tracking Generator Controls

Displayed

Tracking
Generator
Controls

, the tracking generator sweeps from low

Utility Procedu re s

Chapter 3

Chapter 3 65

Utility Procedures

Main Menu

User Keys

User Keys

User keys instantly access instr ume nt settings without using the knob.
You can use user keys to move quickly between fields on the same
screen, and to access field settings that are not normally available on
the screen you are using. When the user key is pressed, the cursor
instantly moves t o , an d se lects, t h e assig n ed field.

Global user keys are used to access settings that are not available on
the current screen. Three global user keys are available: k1’, k2’, and
k3’. (To use one of these keys, press

Local user keys are used to move between s etti ngs on the s c ree n that is
currently displayed. Five local user keys are available for each screen:

k1, k2, k3, k4, and k5. You can assign these keys yourself, or use the

factory preset assignments.

Displaying the Pre-assigned Local User Keys

Shift, then k1, k2, or k3.)

1. Press the Shift key.

2. Press the

3. Press

k4 (Assi gn ) key.

Enter. Now the factory preset keys are displayed.

Assigning a Local User Key

1. Move the cursor to the field you want to assign to a user key.

2. Press the

3. Press the

4. Press the user key you want to assign to the field you chose. The
number of the user key will appear beside the field when you move
the cursor.

Shift key.
k4 (Assi gn ) key.

66 Chapter 3

Assignin g a Gl obal User Key

Main Menu

1. Move the cursor to the field you want to assign to a user key.

Utility Procedures

User Keys

2. Press the

3. Press the

4. Press the

Shift key.
k4 (Assign) key.
Shift key.

5. Press the user key you want to assig n to the field you chose (

k3). Global user keys are indicated as k1’, k2’, and k3’ on the front

panel to indicate that they are shifted functions. The number of the
user key does not appear beside the field when using global user
keys.

To Release a User Key Assignment

Perform the same procedure for assigni ng a key, but instead of pr essing
the k4 (Assign) key, press the k5 (Release) key.

k1, k2, or

Chapter 3 67

Utility Procedu re s

Chapter 3

Utility Procedures

Main Menu

Using Cha nn el Num bers to Set Analy ze r and Generator Freque n ci e s

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 LS AMPS to tell the Test Set you are
testing Land (base) Station AMPS radios. This automatically sets the
correct 45 MHz frequency offset needed to generate reverse channel
signals and analyze forward channel signals for an AMPS base station.

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 3-9 Configuration to Use Channel Numbers for RF Generator and

Analyzer Settings

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

Select the RF Chan Std field to dis-

play a list of system types.....

for channel tuning, you also need

.

..and then select LS AMPS for testi ng
AMPS base stations.

68 Chapter 3

Utility Procedures

Main Menu

Using Channel Numbers to Set Analyzer and Generator Frequencies

RF Chan and Tune Freq Fields

NOTE All of the test procedures in this document assume you are using

channel tuning. If you are using frequency tuning, enter the frequency
in the appropriate field(s).

When you use channel tuning, the RF ANALYZER and RF
GENERATOR screens displays an RF Ch an ne l field for entering the
channel to tune to or generate.

When you use frequency tuning, the RF ANALYZER screen replaces
the RF Channel field with the Tune Freq field for direct frequency
entry. The RF GENERATOR screen replaces the RF Channel fie ld
with the RF Gen Freq field. For AMPS Base Station tests, remember
that there should always b e a 45 MHz sep arat ion betw een the transmit
and receive frequencies (trans mit frequency is 45 MHz greater t han the
receive frequency).

Chapter 3 69

Utility Procedu re s

Chapter 3

Utility Procedures

Main Menu

Voltmeter

Voltmeter

A voltmeter is availa ble in the Test Set, and can measure low level dc or
ac voltages. The input to the voltmeter is controlled by the AF Anl In
field in the AF ANALYZER screen.

CAUTION Do not exceed the rated input to the Test Set for the DC Level and

AC Level measurements.

The connector best suited to making ac Level and dc Level
measurements is the AUDIO IN port.

Measuring AC Level and DC Level

1. Press Shift, then RF Anl (AF Anl) to go to the AF ANALYZER screen.

2. Select AF Anl In and choose Audio In.

3. Select Audio In Lo and choose Gnd. This sets the AUDIO IN LO
port to ground, which allows you to measure voltage at the AUDIO
IN HI port.

4. Attach a probe (for example a 1:1 oscilloscope probe) to the AUDIO
IN HI connector.

5. AC Level is displayed. To change to DC Level, select the AF Freq
measurement and choose DC Level from the displayed list of
choices.

70 Chapter 3

Index

Main Menu

Index

Index

Index

A

AC level

measuring

AC volts

measuring

AF Anl Input

field
AF connections
AMPS Base Stations

manual testing
AMPS testing
AMPS tests

receiver sensitivity (SINAD)

receiver squelch threshold

transmitter data deviation

transmitter frequency

transmitter maximum voice

transmitter SAT frequency and
AMPS Tests listed

analyzer and generator

frequencies

using channel numbers
Analyzing FM Carrier
ANT IN port

overpower
Antenna In field
ANTENNA IN port

losses
Assembly Level Repair Manual

calibration
assigning global user keys
assigning local user keys
AUDIO IN port
AUDIO OUT port
automatic operation
Available AMPS tests

, 70
, 70

, 54

, 32

, 29

, 18

error/offset and power
deviation
deviation

, 40
, 36

, 30

, 68

, 26

, 30

, 33

, 33

, 22

, 66

, 32

, 32

, 21

, 30

, 45

, 38

, 34

, 67

, 42

B

Base Station connections
batteries

replacing

beeper

, 18

, 50

, 32

C

cable losses

compensating

cables

for printing
HP-IB

, 61

Null Modem

calibration

Assembly Level Repair Manual

22

when you change a module

call center

Europe
U.S.

, 19

Canada HP Direct
CD-ROM

documentation
Cell Band CDMA testing
change battery procedure
channel numbers

using, to set analy z er and

generator fre quencies
congratulations
connections

base station
FM Loopback test

conventions used in his manual

15

, 33

, 61

, 61

, 22

, 19

, 19

, 20

, 18

, 18

, 68

, 27

, 32

, 23

,

,

Index 71

Index

Main Menu

D

Data Deviation test
DC level

measuring

DC volts

measuring
Displaying an FM Carrier
Duplex Out field
DUPLEX OUT port

losses

overpower

, 70
, 70

, 33

, 30

, 38

, 33

, 32

, 26

E

entering test system losses and

gains, 33

European Call Center

, 19

F

fields

selecting

FM Carrier

analyzing

displaying
FM Loopback test
FM Signal

displa ying
FM signal

generating
frequencies

setting analyzer and generator
Frequency Error test

, 24

, 26

, 26

, 23

, 23

, 24

68

, 34

,

72 Index

Index

Main Menu

Index

G

generating an FM signal
Getting Help
Getting Started
global user keys

assigning
releasing

, 19

, 17

, 66

, 67

, 67

, 24

H

help

how to get
online
screen disp l ay

hot keys

setting

HP Direct

Canada
Korea

HP-IB communications

via the serial port

HP-IB controller

internal to the Test Set

HP-IB port

controlli ng
modes

, 19

, 57

, 57

, 66

, 19

, 19

, 59

, 58

, 58

, 21

I

IBASIC Programs
in this manual
INSTRUMENT CONFIGURE

screen

, 33

, 21

, 15

Index 73

Index

Main Menu

K

k1, k2, k3, k4, k5

local user keys

k1’, k2’, k3’

global user keys

knob

using

, 24

Korea HP Direct

, 66

, 66

, 19

L

local user keys

assigning
preassigned
releasing

Loopback Test

, 66

, 67

, 66

, 66

, 23

M

manual operation
manual testing

AMPS base stations
maximizing measurement

accuracy

measurement accuracy

maximizing
measurement po rt
measuring path losses and gains

31

memory cards
modes of the Test Set

, 21

, 29

, 22

, 22

, 30

, 52

, 21

,

74 Index

Index

Main Menu

Index

O

oscilloscope

features
filter s a n d inputs
marker
selecting the filters
selecting the input
triggering

, 53

, 53

, 56

, 55

, 53

, 54

, 54

P

parallel port

input and output modes
ports 15 and 16

path losses

measuring

PCMCIA card

Flash ROM
initializing
OTP

, 52

SRAM

, 52

PCS CDMA testing
port

HP-IB

, 58

HP-IB, serial, parallel
measuring AC or DC level
printing via the serial port
serial

Power
Power calibration/compensation
preassi gn e d lo c al u se r ke y s

printi n g

probe
Product Descript ion

Programmer’s Guide
purchased software

, 58

measurement port

22

, 61

and data collection
cables

, 61

configuring the Test Set
FF (Form Feed)
how to print a screen
HP-IB

, 61

lines per page
parallel port
ports

, 61

serial port 9
via the serial port

measuring AC or DC level

, 60

, 33

, 31

, 52

, 52

, 52

, 61

, 61

, 61

, 61

, 60

, 18

, 58

, 70

, 59

, 30

, 66

, 61

, 61

, 61

, 59

, 70

, 18

, 21

, 21

R

RAM

backing up
read me first
Receiver Sensitivity test
recevier squelch threshold
return loss
RF connections
RF In/Out field
RF IN/OUT port

losses

measuring power

overpower
RF Level Offset field

, 62

, 33

,

, 18

, 31

, 42

, 45

, 32
, 33

, 32

, 30

, 30

, 33

Index 75

Index

Main Menu

S

sales offices
SAT Deviation test
SAT Frequency test
screens

selecting

serial port

configuring
configuring for HP-IB

port 9, configuring for HP-IB
port 9, configuring for printing
ports 10 and 11

using for printing

signal losses and gains

compensating
SINAD test
softwa re

manufacturer-specific

purchased
Spectrum Analyzer
squelch thres hold
SRAM card

initializing
systems

AMPS

CDMA

PCS CDMA

, 19

, 36

, 36

, 24
, 58

, 58

communications
communications

59

, 59

, 59

, 33

, 42

, 21

, 26

, 45

, 52

, 18

, 18

, 18

, 59
, 59

, 21

T

temperature compensation

fields

, 65

, 22

, 24

, 19

, 30

, 34

Pwr Zero
test interface connections
Test Set

documents included

what’s in the box
tips for selecting screens and

TMO web site
tools contain ed in the Test Set
tracking generator

,

controls disp lay

offset frequency

using
TX Power
TX Power test

, 20

, 65
, 65
, 65

, 20

, 32

, 18

U

U.S. Call Center
user keys

global

, 66

local

, 66

releasing
setting

Utility Procedures

, 67

, 66

, 19

, 49

76 Index

Index

Main Menu

Index

V

Voice Deviation (max) test
voltmeter

connector

volume

controlling beep er

, 70

, 70

, 50

, 40

W

web site

TMO

, 19

what to do next

What’s Included with this Test

Set

www.tmo.hp.com

, 20

, 27

, 19

Index 77