Agilent E8285A Data Sheet

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Dear Customer,

As of November 1, 1999, four of Hewlett-Packard’s businesses, test and measurement,
semiconductor products, health care solutions, and chemical analysis became a new company,
Agilent Technologies. Now, many of your Hewlett-Packard products and services are in the care of
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At Agilent Technologies, we are working diligently to make this transition as smooth as possible for
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(HP), but applies to your Agilent Technologies product. Hewlett-Packard and Agilent branded
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HP E8285A CDMA Mobile Station Test Set

Application Guide

HP Part No. E8285-90019

Printed in U. S. A.

September 1999

Rev. B

1

Copyright © Hewlett-Packard Company 1999

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

All Rights Reserved. Reproduction, adaptation, or translation wit hout prior wri tten
permission is prohibited, except as allowed under the copyright laws.

This material may be reproduced by or for the U.S. Government pursuant to the
Copyright License under the clause at DFARS 52.227-7013 (APR 1988).

Hewlett-Packard Company
Learning Products Department
24001 E. Mission
Liberty Lake, WA 99019-9599
U.S.A.

2

Manufacturer’s Declaration

This statem ent is provide d to comply with the requirements of
the German Sound Emission Directive, from 18 January 1991.
This product has a sound pressure emission (at the operator
position) < 70 dB(A).

• Sound Pressure Lp < 70 dB(A).

• At Operator Position.

• Normal Operation.

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

Herstellerbescheinigung

Diese Information steht im Zusammenhang mit den Anforderungen der

Maschinenlärminformationsverordnung vom 18 Januar 1991.

• Schalldruckpegel Lp < 70 dB(A).

• Am Arbeitsplatz.

• Normaler Betrieb.

• Nach ISO 7779:1988/EN 27779:1991 (Typprüfung).

3

Safety
Considerations

GENERAL
This product and related do cumentatio n must be reviewe d for familiar ization wi th

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

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

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

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

CHASSIS GROUND TERMINAL
T o preve nt a po tenti al shock hazard , always con nect t he rea r - panel c hassi s groun d

terminal to e arth ground when operating this instrument from a dc power source.
SAFETY SYMBOLS
Indicates instrument damage can occur if indicated operating limits are exceeded.

!

Indicates hazardous voltages.
Indicates earth (ground) terminal

WARNING

A WARNING note denotes a hazard. It calls attention to a procedure,
practice, or the like, which, if not correctly performed or adhered to, could
result in personal injury. Do 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 u nderstood and met.

4

Safety Considerations for this Instrument

WARNING This product is a Safety C lass I instrument (provided with a p rotective

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 int erruption is
prohibited..

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

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

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

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

For Continued protection against fire hazard, replace the line fuse(s) only
with 250 V fuse(s) or the same current rating a nd type (for ex ample, normal
blow or time delay). Do not use repaired fuses or short circuited
fuseholders.

5

WARNING: 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 product damage.
This product is design ed 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.

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

WARNING: Ventilation Requirements: When installing the produ ct 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.

Product
Markings

CE - the CE mark is a registered trademark of the European Community. A CE
mark accompanied by a year indicated the year the design was proven.

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

6

Hewlett-Packard Warranty Statement for Commercial Products

HP E8285A CDMA
Mobile Station
Test Set

Duration of
Warranty: 1 year

1. HP warrants HP hardware, accessories and supplies against defects in materials and

workmanship for the period specified above. If HP receives notice of such defects
during the warranty period, HP will, at its option, either repair or replace products
which prove to be defective. Replacement products may be either new or like-new.

2 HP warrants that HP software will not fail to execute its programming instructions, for

the period specified above, due to defect s in mat erial and workmanshi p when pr operl y
installed and used. If HP receives notice of such defects during the warranty period, HP
will replace software media which does not execute its programming instructions due
to such defects.

3. HP does not warrant that the operation of HP products will be uninterrupted or error

free. If HP is unable, within a reasonable time, to repair or replace any product to a
condition as warranted, customer will be entitled to a refund of the purchase price upon
prompt return of the product.

4 HP products may contain remanufactured parts equivalent to new in performance or

may have been subject to incidental use.

5. The warranty period begins on the date of delivery or on the date of installation if

installed by HP. If cus tomer schedules o r delays HP i nstallation mor e than 30 days afte r
delivery, w arranty begins on the 31st day from delivery.

6 Warranty does not apply to defects resulting from (a) improper or inadequate mainte-

nance or calibration, (b) software , interfacing, pa rts or su pplies not suppl ied by HP, (c)
unauthorized modification or misuse, (d) operation outside of the published environ­mental specifications for the product, or (e) improper site preparation or maintenance.

7 TO THE EXTENT ALLOWED BY LOCAL LAW, THE ABOVE WARRANTIES

ARE EXCLUSIVE AND NO OTHER WARRANTYOR CONDITION, WHETHER
WRITTEN OR ORAL IS EXPRESSED OR IMPLIED AND HP SPECIFICALLY
DISCLAIMS ANY IMPLIED WARRANTIES OR CONDITIONS OR MERCHANT­ABILITY, SATISFACTORY QUALITY, AND FITNESS FOR A PARTICULAR
PURPOSE.

8 HP will be liable for damage to tangible property per incident up to the greater of

$300,000 or the actual amount paid for the product that is the subject of the claim, and
for damages for bodily injury or death, to the extent that all such damages are deter­mined by a court of competent jurisdiction to h ave b een directly caused by a defective
HP product.

7

9. TO THE EXTENT ALLOWED BY LOCAL LAW, THE REMEDIES IN THIS

WARRANTY STATEMENT ARE CUSTOMER’S SOLE AND EXCLUSIVE
REMEDIES. EXCEPT AS INDICATED ABOVE, IN NO EVENT WILL HP OR ITS
SUPPLIERS BE LIABLE FOR LOSS OF DATA OR FOR DIRECT, SPECIAL,
INCIDENTAL, CONSEQUENTIAL (INCLUDING LOST PROFIT OR DATA), OR
OTHER DAMAGE, WHETHER BASED IN CONTRACT, TORT, OR
OTHERWISE.

FOR CONSUMER TRANSACTIONS IN AUSTRALIA AND NEW ZEALAND:
THE WARRANTY TERMS CONTAINED IN THIS STATEMENT, EXCEPT TO
THE EXTENT LAWFULLY PERMITTED, DO NOT EXCLUDE RESTRICT OR
MODIFY AND ARE IN ADDITION TO THE MANDATORY STATUTORY
RIGHTS APPLICABLE TO THE SALE OF THIS PRODUCT TO YOU.

ASSISTANCE Product maintenance agreements and other customer assistance agreements are

available for Hewlet t-Packard pr oduct s. For any as sistance , contact your nearest
Hewlett-Packard Sales and Service Office.

8

DECLARATION OF CONFORMITY

according to ISO/IEC Guide 22 and EN 45014

Manufacturer’s Name:

Manufacturer’s Address:

Hewlett-Packard Co.
Spokane Division

24001 E. Mission Avenue
Liberty Lake, Washington 99019-9599
USA

declares that the product

Product Name:
Model Number:
Product Options:

CDMA Mobile Station Test Set
HP E8285A

All

conforms to the following Product specifications:

Safety: IEC 61010-1:1990+A1+A2 / EN 61010-1:1993+A2
EMC: CISPR 11:1990 / EN 55011:1991- Group 1, Class A

IEC 61000-3-2:1995 / EN 61000-3-2:1995
IEC 61000-3-3:1995 / EN 61000-3-3:1994
EN 50082-1 : 1992
IEC 801-2:1991 - 4kV CD, 8kV AD
IEC 801-3:1984 - 3 V/m

IEC 801-4:1988 - 0.5 kV Signal Lines,

1 kV Power Lines

Supplementary Information:

This product herewith complies with the requirements of the Low Voltage Directive
73/23/EEC and the EMC Directive 89/336/EEC and carries the CE-marking
accordingly.

Spokane, Wash i ng ton USA June 16, 1999

European Contact: Your local Hewlett-Packard Sales and Service Office or Hewlett-Packard GmbH
Department ZQ/Standards Europe, Herrenberger Strasse 130, D-71034 Böblinger, Germany (FAX[phone])

9

Vince Roland
Reliability & Regulatory
Engineering Manager

10

Contents

Calibrating the Test Set

Calibration Procedures....................................................................................................................... 14

Calibrating CDMA Channel Levels (PCB Cal)................................................................................. 16

Calibrating Channel Power Measurements........................................................................................ 20

Zeroing Average Power Measurements .............................................................................................24

Correcting for RF Path Loss.............................................................................................................. 29

Determining RF Path Loss................................................................................................................ 33

Setting Up a Call

Steps for Setting Up a Call................................................................................................................. 46

Problem Solving................................................................................................................................. 55

CDMA Receiver Tests

Table of Contents

Measuring Demodulation of Forward Traffic Channel with AWGN.................................................60

Measuring Receiver Sensitivity and Dynamic Range........................................................................75

Measuring Single Tone Desensitization.............................................................................................88

Measuring Intermodulation Spurious Response Attenuation.............................................................105

Measuring Demodulation of Non-Slotted Mode Paging Channel in AWGN.................................... 118

CDMA Transmitter Tests

Measuring Waveform Quality............................................................................................................130

Measuring Minimum/Maximum Power............................................................................................139

Measuring Maximum RF Output Power............................................................................................143

Measuring Minimum Controlled Output Power................................................................................ 153

Measuring the Range of Open Loop Output Power........................................................................... 164

Measuring Access Probe Output Power.............................................................................................175

CDMA to Analog Handoff

Performing a CDMA to Analog Handoff........................................................................................... 190

Authentication Tests

Initializing SSD to Zero..................................................................................................................... 201

Updating SSD.................................................................................... ......... ........................................209

11

Contents

Performing a Unique Challenge-Response.........................................................................................216

Short Mess age Service Tests

Sending Short Messages on the Paging/Access Channels..................................................................225

Sending Short Messages on the Traffic Channels...............................................................................233

Establishing HP-IB Communication

Setting Up HP-IB Control...................................................................................................................242

Using the Analog Call Processing Subsystem

Description of the Analog Call Processing Subsystem.......................................................................248

Using Manual (Front-Panel) Control..................................................................................................252

Description of the Call Processing Subsystem’s Remote User Interface............................................258

Using Remote (HP-IB) Control..........................................................................................................260

Using the CALL CONTROL Screen to Test Call Processing Functions ...........................................267

Using the CALL CONTROL Screen to test AMPS Authentication...................................................277

Using the CALL DATA Screen...........................................................................................................289

Using the CALL BIT Screen ..............................................................................................................296

Using the ANALOG MEAS Screen ...................................................................................................301

Protocol Logging

Hardware and Software Requirements ...............................................................................................307

Connecting the Te st Set to the Computer............................................................................................309

Setting Up the Communications Package...........................................................................................311

Logging Protocol Messages................................................................................................................314

Control Commands for Protocol Logging ..........................................................................................317

Increasing Measurement Throughput

Paging un-registered mobile stations..................................................................................................322

Performing Transmitter and Receiver testing concurrently................................................................331

Minimizing bus configuration time.....................................................................................................334

Reducing delays caused by unused measurements.............................................................................336

Reducing delays caused by screen changes........................................................................................337

Reducing measurement setup time .....................................................................................................338

12

1

Calibrating the Test Set

Chapter 1

Calibrating the Test Set

13

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Chapter 1, Calibrating the Test Set

Calibration Procedures

Calibration Procedures

The list below shows all of the calibration procedures that must be performed
periodically when testing CDMA mobile stations with the Test Set.

"Calibrating CDMA Channel Levels (PCB Cal)" on page 16

Guidelines:

"Calibrating Channel Power Measurements" on page 20
"Zeroing Average Power Measurements" on page 24.
"Correcting for RF Path Loss" on page 29.
"Determining RF Path Loss" on page 33.

"Recommended Periodic Calibration Procedures:" on page 15 provides a checklist of

calibration procedures for various events that could affect the performance of the Test Set.

.

Guidelines include:

•After "Calibrating CDMA Channel Levels (PCB Cal)" on page 16 (also known as
"PCB CAL") is performed, you must then perform "Calibrating Channel Power

Measurements" on page 20.

• It is highly recommended that "Correcting for RF Path Loss" on page 29, for both
the forward and reverse channels, be performed before using the Test Set to make
measurements. This procedure eliminates the need fo r ad ding level offsets to your test
code, and extends the Test Set’s operati ng range with some mobile stations .

• A 30-minute warm-up period is recommended to allow the Test Set to reach a stable
operating temperature.

14

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Recommended Periodic Calibration Procedures:

Chapter 1, Calibrating the Test Set

Calibration Procedures

When Test Set is being used for the first
time (allow 30-minute warmup perio d).

After extended power off cycle (allow 30­minute warmup period).

After firmware is upgraded

When the "Uncal" light is flashing
Before making an Average Power measure-

ment
If the RF connections to the PCS interface

are adjusted.
If the ambient temperature changes more

than 5 degrees C since latest calibration
Ram Initialization

"Calibrating

CDMA Channel

Levels (PCB Cal)"

on page 16

"Calibrating

Channel Power

Measurements"

on page 20

"Zeroing Average

Power

Measurements"

on page 24

Calibrating the Test Set

Chapter 1

Every month

15

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Chapter 1, Calibrating the Test Set

Calibrating CDMA Channel Levels (PCB Cal)

Calibrating CDMA Channel Levels (PCB Cal)

Approximate time: 8 minutes
The Test Set optimizes the level accuracy of CDMA code channels and the

AWGN (Additive White Gaussian Noise) generator by measuring the analog I/Q
signals on an i nternal DSP-base d voltmete r. Level correcti on fact ors ar e genera ted
by a ROM-based program named PCB_CAL and are applied to gain control
DACs, which control the fine level adjustment in the amplitude scaling path.

Calibrated channel power provides accurate values for Eb/Nt, the ratio between
Traffic channel power and AWGN. It is critical that these levels remain accurate.
A level accuracy error of 0.8 dB could alter FER from 0.5% to 5%.

AWGN

Analog I

Analog Q

Level Correction
Factors

Procedure Overview

To DSP

Diagnostic Mux

Σ

Voltmeter

I Output

Σ

Q Output

Gain Control

DAC

For detailed step-by-step explanation see the page associated with the step.

1. "Load the PCB_CAL procedure." on page 17.

2. "Lower the Test Set’s output power if necessary." on page 26.

3. "Select the Average Power measurement." on page 27.

16

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1. Load the PCB_CAL procedure.

Manual Operation:

1. Press the Tests key.

Chapter 1, Calibrating the Test Set

Calibrating CDMA Channel Levels (PCB Cal)

Calibrating the Test Set

2. Select ROM from the list of choices for the
Select Procedure Location field.

3. Select PCB_CAL from the list of choices for
the Select Procedure Filename field.

The TESTS (Main Menu) screen provides access to the Test Set’s internal IBASIC controller. You can load,
run, and customize procedures on this screen.

HP-IB Syntax

"DISP TEST" ! displays the TESTS (Main Menu) screen.

"TEST:PROC:LOC ’ROM’" ! selects ROM as the test procedure location.

"TEST:PROC:NAME ’PCB_CAL’" !selects the file named "PCB_CAL"

Chapter 1

17

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Chapter 1, Calibrating the Test Set

Calibrating CDMA Channel Levels (PCB Cal)

2. Remove power from the ANTENNA IN port.

Manual Operation:

1. Disconnect any cable connected to the
ANTENNA IN connector or turn off power
from any signal source connected to the
ANTENNA IN connector.

18

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3. Run the PCB_CAL Procedure.

Chapter 1, Calibrating the Test Set

Calibrating CDMA Channel Levels (PCB Cal)

Manual Operation:

1. Position the cursor next to the Ru n Test field.

2. Press the knob.

3. When the PCB_CAL procedure has completed,
cycle power.

At the beginning of the procedure, the Test Set will beep and the message "Direct latch write occurred. Cycle
power when done servicing" will appe ar. This is normal.

During this procedure the display will show cal factors for I and Q channels on the screen.When the calibration
procedure has completed, the message "Cycle instrument power to restore test set to normal operating
conditions" will be displayed at the top of the screen. Cycle power using the front panel POWER key, or send the
SYSTem:RESTart command shown below.

The PCB_CAL procedure will run for about 8 minutes unless a failure occurs. If a failure occurs, the program
will stop, bit 8 in the Calibration Status Register will be set true, and the Test Set will display "PCB CAL
UNSUCCESSFUL".

Calibrating the Test Set

Chapter 1

HP-IB Syntax

"TEST:PROC:RUN" !starts the PCB Cal routine

"STATus:OPERation:CONDition" !queries the Operation Status Register. If the PCB Cal

procedure is still running, bit 14 (IBASIC Program Running) will be set true.

"STATus:CALibration:EVENt?" !queries the Calibration Status Register. If the PCB Cal pro­cedure failed, bit 8 will be set true.

"SYSTem:RESTart" !re-boots the Test Set (can be performed in place of cycling power)

19

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Chapter 1, Calibrating the Test Set

Calibrating Channel Power Measurements

Calibrating Channel Power Measurements

The time period for calib rati ng channe l power meas urement s depend s on the sp an
of frequencies selected. A message will be displayed to let the user know how
long the procedure will take.

The Test Set can be configured to limit calibration to specific bands, calibrate all
bands, or calibrat e the fr equency r ange corr esponding with desi gnated RF c hannel
standards (for example, Japan CDMA).

A verag e Power measurement s are zeroed as part of the Channel Power calibrat ion
process.

Procedure Overview

For detailed step-by-step explanation see the page associated with the step.

1. "Configure the Test Set to calibrate alternate frequency bands. (Optional)" on

page 21

2. "Select the Channel Power or Access Probe Power measurement." on page 22.

3. "Calibrate the Channel Power measurement." on page 23.

20

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Chapter 1, Calibrating the Test Set

Calibrating Channel Power Measurements

1. Configure the Test Set to calibrate alternate frequency bands. (Optional)

Manual Operation:

1. Press the Config key to display the
CONFIGURE screen.

2. Position the cursor in front of Alt Pwr Ms Cal
Bands field. Press the knob and select the
additional channel standard or complete cellular
band for channel power measurement
calibration.

Calibrating the Test Set

Chapter 1

Channel Power Calibration wil l be per formed over th e frequency bands i nclud ed i n the RF C han Std an d t he
Alt Pwr Ms Cal Bands field selections . Adding an alternate channel standard or band will increase the time
required for the Test Set to perform Channel Power Calibration.

21

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Chapter 1, Calibrating the Test Set

Calibrating Channel Power Measurements

2. Select the Channel Power or Access Probe Power measurement.

Manual Operation:

1. Position the cursor next to the field that displays
Avg Power , Acc P rb P wr, or Chan Po wer. This
field is found on the CDMA CALL
CONTROL, CDMA CELLULAR MOBILE
TRANSMITTER TEST, and CDMA
TRANSMITTER POWER RANGE TEST
screens.

2. Make sure Chan Power or Acc Prb Pwr is
selected.

HP-IB Syntax

"CDMA:TX:POW:MEAS ’Chan Power’" selects Channel Power measurements.

22

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3. Calibrate the Channel Power measurement.

Chapter 1, Calibrating the Test Set

Calibrating Channel Power Measurements

Manual Operation:

1. Position the cursor next to the Power Meas
field.

2. Press the knob.

The Test Set will display "Cal takes about X
minutes. Continue?"

3. Press the Yes key.

Calibration may take a minute or longer, depending on the RF Channel Std and Alt Chn Std field settings. If
you are performing calibration using the HP-IB command below, be aware that the Test Set will accept
(handshake) HP-IB commands during the calibration routine, but none of these "buffered" HP-IB command
functions will be executed until channel power calibration is complete.

HP-IB Help

Calibrating the Test Set

Chapter 1

During the channel power calibration firmware routine, the Test Set will not respond to HP-IB queries. To
determine when this procedure is done, query the Calibrating status register. When calibration has
completed, the Test Set will return a value with bit 0 and bit 1 set true.

If your controlling application has an I/O timeout enabled make sure that sufficient time is given for the
Test Set to complete calibration and provide a query response in its output queue. Or, disable the timeout
during channel power calibration.

HP-IB Syntax

"MEAS:CDM:CHAN:CAL" !calibrates Channel Power measurements.
"STAT:OPER:CAL:EVENt?" !queries the Calibrating Status Event Register.
Bit 1 is the channel power calibration bit.

23

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Chapter 1, Calibrating the Test Set

Zeroing Average Power Measurements

Zeroing Average Power Measurement s

Approximate length of time: 2 seconds
Average Power measurements should be zeroed before each measurement or

series of m easurements.

NOTE: A misleading Average Power measurement may appear when low (or no) signal power

is applied to the RF Input! When the RF generator’s output port selection is RF IN/

OUT, some of the signal energy from the Test Set’s generator is detected by the Test Set’s
broadband average power meter. This condition does not affect typical CDMA
measurements for two reasons: 1) During Average Power m easurements CDMA gener ator
levels are too low to introduce significant energy to the power detector. 2) When the
generator level is high enough to introdu ce significant energy to the power detector, the
mobile station’s signal power should be within the range of Channel Power measurements.
Channel power measurements are frequency-selective, and d o not detect significant energy
from the Test Set’s generator, which is tuned 45 MHz away from the analyzer.

Procedure Overview

For detailed step-by-step explanation see the page associated with the step.

1. "Remove power from the RF IN/OUT connector." on page 25.

2. "Lower the Test Set’s output power if necessary." on page 26.

3. "Select the Average Power measurement." on page 27.

4. "Zero the Average Power measurement." on page 28.

24

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1. Remove power from the RF IN/OUT connector.

Chapter 1, Calibrating the Test Set

Zeroing Average Power Measurements

Calibrating the Test Set

Chapter 1

25

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Chapter 1, Calibrating the Test Set

Zeroing Average Power Measurements

2. Lower the Test Set’s output power if necessary.

Manual Operation:

1. Press the Preset key, which will set RF Power
to a level that will not degrade Average Power
zeroing, or turn off all sources as follows:

1a. Press the Gen Control key to dis play the

CDMA

1b. Turn off Sector A Power, Sector B Power,

and AWGN (by pressing the ON/OFF key on

the Test Set’s front panel).

GENERATOR CONTROL screen.

Turning off power from the CDMA generators will prevent power from cross-coupling internally to the
RF IN/OUT path during Average Power measurement zeroing.

Presetting the test Set (*RST HP-IB command) will turn off Sector B and AWGN, and will lower Sector A
Power to a level that will not affect zeroing the Average Power measurement, making it unnecessary to turn
Sector A Power off.

HP-IB Syntax

"CDMA:CELL:ASEC:STAT OFF" !turns off Sector A Power
"CDMA:CELL:BSEC:STAT OFF" !turns off Sector B Power
"CDMA:AWGN:STAT OFF" !turns off AWGN

26

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3. Select the Average Power measurement.

Chapter 1, Calibrating the Test Set

Zeroing Average Power Measurements

Manual Operation:

1. Press the CDMA SCREENS - Tx test key to
display the CDMA CELLULAR MOBILE
TRANSMITTER TEST screen.

2. Position the cursor next to the field as shown.

3. Press the knob to select the Choices menu.

4. Select Avg Power from the list.

HP-IB Syntax

"CDMA:TX:POW:MEAS ’Avg Power’" selects Average Power measurements.

Calibrating the Test Set

Chapter 1

27

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Chapter 1, Calibrating the Test Set

Zeroing Average Power Measurements

4. Zero the Average Power measurement.

Manual Operation:

1. Press the CDMA SCREENS - Tx test key to
display the CDMA CELLULAR MOBILE
TRANSMITTER TEST screen.

2. Position the cursor next to the Zero field.

3. Press the knob.

Zeroing Average Power takes approximately
two seconds.

If RF power was not lowered as shown in step 2, the Test Set will display "Zero degraded. Reduce generator
level for best results" .

HP-IB Syntax

"MEAS:CDM:AVGP:ZERO" ! zeroes the average power meter.

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Chapter 1, Calibrating the Test Set

Correcting for RF Path Loss

Correcting for RF Path Loss

Approximate time: N/A (this pro cedure is simpl y a field entry).
The Test Set provides fields to enter independent path loss values for the forward

and reverse channels to compensate for the differences in frequency response.
The settings you make in the following procedure must be re-entered after a

power-cycle, instrument preset, or HP-IB reset ("*RST).
It is highly recommended that RF path loss is corrected for in the following

manner.

NOTE: The Test Set’s attenuator auto-ranging algorithm, used for adjusting gain in the RF analyzer

path, estimates the expected power level from the phone using the open loop power cont rol
formula. External path loss, entered in the procedure below, is used by the auto-ranging
algorithm to ensure the analyzer is not overdriven or underdriven.

Procedure Overview

For detailed step-by-step explanation see the page associated with the step.

1. "Enter the forward channel path loss from the Test Set to the MSUT." on page 30.

2. "Enter the reverse channel path loss from the Test Set to the MSUT." on page 31.

3. "Turn on RF Level Offset." on page 32.

Calibrating the Test Set

Chapter 1

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