Agilent Technologies
8922 Multi-Band Test System
Supplementary
User’s Guide
Systems Covered
HP/Agilent 8922P Multi-Band Test System
HP/Agilent 8922R Multi-Band Test System
HP/Agilent 8922X Multi-Band Test System
HP/Agilent 8922Y Multi-Band Test System
Agilent Part No. 08922-90226
Printed in UK
October 1998
© Copyright 1998, Agilent Technologies. All rights reserved. Reproduction, adaptation, or translation without prior
written permission is prohibited, except as allowed under the copyright laws.
Warranty
Warranty
This Agilent Technologies instrument product is warranted against defects in material and
workmanship for a period of one year from date of shipment. During the warranty period,
Agilent Technologies 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 Agilent Technologies. Buyer shall prepay shipping charges to Agilent
Technologies and Agilent Technologies shall pay shipping charges, duties, and taxes for
products returned to Agilent Technologies from another country.
Agilent Technologies warrants that its software and firmware designated by Agilent
Technologies for use with an instrument will execute its programming instructions when
properly installed on that instrument. Agilent Technologies does not warrant that the
operation of the instrument, or software, or firmware will be uninterrupted or error free.
Limitation of Warranty
The foregoing warranty shall not apply to defects resulting from improper or inadequate
maintenance by Buyer,Buyer-supplied software or interfacing, unauthorized modification
or misuse, operation outside of the environmental specifications for the product, or
improper site preparation or maintenance.
NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. AGILENT
TECHNOLOGIES SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
Limitation of Remedies and Liability
THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE
REMEDIES. AGILENT TECHNOLOGIES SHALL NOT BE LIABLE FOR ANY
DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.
i
Responsibilities of the Customer
Responsibilities of the Customer
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nance.
2 Adequate working space around the products for servicing by Agilent Technologies
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responsibility for safeguarding and protection from wrongful use.)
4 Routine operator maintenance and cleaning as specified in the Agilent Technologies
Operating and Service Manuals.
5 Consumables such aspaper,disks, magnetic tapes, ribbons, inks, pens, gases, solvents,
lamps, filters, fuses, seals, etc.
Certification
Agilent Technologies certifies that this product met its published specifications at the time
of shipment from the factory. Agilent Technologies further certifies that its calibration
measurements are traceable to the United States National Bureau of Standards and
Technology, to the extent allowed by the Bureau’s calibration facility, and to the
calibration facilities of other International Standards Organization members.
Assistance
Product maintenance agreements and other customer assistance agreements are available
for Agilent Technologies products.
For any assistance, contact your local Agilent Technologies Sales and Service Office. For
a list of contact information, see “Sales and Service Offices” on page 79i.
ii
Notices
Notices
The material contained in this document is subject to change without notice. AGILENT
TECHNOLOGIES MAKES NO WARRANTY OF ANY KIND WITH REGARD TO
THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. Agilent Technologies shall not be liable for errors contained herein or for
incidental or consequential damages in connection with the furnishing, performance or use
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equipment that is not furnished by HP.
Restricted Rights Legend
If Software is for use in the performance of a U.S. Government prime contract or
subcontract, Software is delivered and licensed as "Commercial computer software" as
defined in DFAR 252.227-7014 (June 1995), or as a "commercial item" as defined in FAR
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Software is subject to Agilent Technologies’ standard commercial licenseterms, and nonDOD Departments and Agencies of the U.S. Government will receive no greater than
Restricted Rights as defined in FAR 52.227- 19(c)(1-2) (June 1987). U.S. Government
users will receive no greater than Limited Rights as defined in FAR 52.227-14 (June 1987)
or DFAR 252.227-7015 (b)(2) (November 1995), as applicable in any technical data.
Copyright 200X Agilent Technologies Inc. All Rights Reserved.
Statement of Compliance
This product conforms to EN61010-1(1993) / IEC 1010-1(1990) +A1(1992) +A2(1994) /
CSA C22.2 No. 1010.1(1993) Safety requirements for Electrical Equipment for
Measurement, Control and Laboratory Use, and has been supplied in a safe condition. The
instruction documentation contains information and warnings which must be followed by
the user to ensure safe operation and to maintain the instrument in a safe condition.
iii
Electromagnetic Compatibility (EMC) Information
Electromagnetic Compatibility (EMC) Information
This product has been designed to meet the protection requirements of the European
Communities Electromagnetic Compatibility (EMC) directive:
EN55011:1991 (Group 1, Class A)
EN50082-1:1992
- IEC 1000-4-2 (1995) ESD
- IEC 1000-4-3 (1995) Radiated Susceptibility
- IEC 1000-4-4 (1995) EFT
In order to preserve the EMC performance of this product, any cable which becomes worn
or damaged, must be replaced with the same type and specification.
Sound Emission
Manufacturer’s Declaration
This statement is provided to comply with the requirements of the German Sound
Emission Directive, from 18 January 1991.
This product has a sound pressure emission (at the operator position) < 70 dB(A).
❒ Sound Pressure Lp < 70 dB(A).
❒ At Operator Position.
❒ Normal Operation.
❒ According to ISO 7779:1988/EN 27779:1991 (Type Test).
Herstellerbescheinigung
Diese Information steht im Zusammenhang mit den Anforderungen der
Maschinenlärminformationsverordnung vom 18 Januar 1991.
❒ Schalldruckpegel Lp < 70 dB(A).
❒ Am Arbeitsplatz.
❒ Normaler Betrieb.
❒ Nach ISO 7779:1988/EN 27779:1991 (Typprfung).
iv
Declaration of Conformity
according to ISO/IEC Guide 22 and EN45014
Manufacturer’s Name: Agilent Technologies
Declaration of Conformity
Manufacturer’s Address:
South Queensferry
West Lothian, EH30 9TG
Scotland, United Kingdom
Declares that the product
Product Name
:
Model Numbers:
Product Options:
Conforms with the protection requirements of European Council Directive 89/336/EEC on the approximation
of the laws of the member states relating to electromagnetic compatibility.
Against EMC test specifications EN 55011:1991 (Group 1, Class A) and EN 50082-1:1992
As Detailed in:
Assessed by:
Technical Report Number:6893/2200/CBR, dated 23 September 1997
GSM MS Multi-Band Test Set
Agilent Technologies 8922P, 8922R, 8922X, 8922Y
This declaration covers all options of the above products as detailed in
TCF A-5951-9852-02
Electromagnetic Compatibility (EMC)
Technical Construction File (TCF) No. A-5951-9852-02
Dti Appointed Competent Body
EMC Test Centre, GEC-Marconi Avionics Ltd.,
Maxwell Building, Donibristle Industrial Park,
KY11 5LB
Scotland, United Kingdom
Supplementary Information:
The product conforms to the following
safety standards:
The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC, and carries the CEmarking accordingly.
South Queensferry, Scotland 18 November 1997
Location Date R.M. Evans / Quality Manager
EN 61010-1(1993) / IEC 1010-1(1990) +A1(1992) +A2(1994)
CSA-C22.2 No. 1010.1-93
EN 60825-1(1994) / IEC 825-1(1993)
v
Safety Information
Safety Information
The following safety precautions must be observed during all phases of operation, service,
and repair of this instrument. Failure to comply with these precautions or with specific
warnings elsewhere in this manual violates safety standards of design, manufacture, and
intended use of the instrument. Agilent Technologies Inc. assumes no liability for the
customer’s failure to comply with these requirements.
WARNING: This is a Safety Class I instrument (provided with a protective earthing ground,
incorporated in the power cord). The mains plug shall only be inserted in a socket
outlet provided with a protective earth contact. Any interruption of the protective
conductor inside or outside of the instrument is likely to make the instrument
dangerous. Intentional interruption is prohibited.
DO NOT operate the product in an explosive atmosphere or in the presence of flammable
gasses or fumes.
DO NOT use repaired fuses or short-circuited fuseholders: For continued protection
against fire, replace the line fuse(s) only with fuse(s) of the same voltage and current
rating and type.
DO NOTperform procedures involving coveror shield removalunless you are qualified to
do so: Operating personnel must not remove equipment covers or shields. Procedures
involving the removal of covers and shields are for use by service-trained personnel only.
DO NOT service or adjust alone: Under certain conditions, dangerous voltages may exist
even with the equipment switched off. To avoid dangerous electrical shock, service
personnel must not attempt internal service or adjustment unless another person, capable
of rendering first aid and resuscitation, is present.
DO NOT operate damaged equipment: Whenever it is possible that the safety protection
features built into this product have been impaired, either through physical damage,
excessive moisture, or any other reason, REMOVE POWER and do not use the product
until safe operation can be verified by service-trained personnel. If necessary, return the
product to an Agilent Technologies Sales and Service Office for service and repair to
ensure the safety features are maintained.
DO NOT substitute parts or modify equipment: Because of the danger of introducing
additional hazards, do not install substitute parts or perform any unauthorized
modification to the product. Return the product to an Agilent Technologies Sales and
Service Office for service and repair to ensure the safety features are maintained.
vi
Safety Symbols
Safety Symbols
The following symbols on the instrument and in the manual indicate precautions which
must be taken to maintain safe operation of the instrument
Safety Symbols
The Instruction Documentation Symbol. The product is marked with this symbol when
it is necessary for the user to refer to the instructions in the supplied documentation.
Indicates the field wiring terminal that must be connected to earth ground before operating the equipment - protects against electrical shock in case of fault.
Frame or chassis ground terminal - typically connects to the equipment's metal frame.
Alternating current (AC)
Direct current (DC)
Indicates hazardous voltages.
WARNING Warning denotes a hazard. It calls attention to a procedure, which if not correctly per-
formed or adhered to could result in injury or loss of life. Do not proceed beyond a
warning note until the indicated conditions are fully understood and met.
CAUTION Caution denotes a hazard. It calls attention to a procedure, which if not correctly per-
formed or adhered to could result in damage to or destruction of the instrument. Do not
proceed beyond a warning note until the indicated conditions are fully understood and
met.
The CE mark shows that the product complies with all relevant European Legal Directives.
ISM 1-A This is a symbol of an Industrial, Scientific, and Medical Group 1 Class A product.
The CSA mark is a registered trademark of the Canadian Standards Association, and
indicates compliance to the standards defined by them.
Indicates that a laser is fitted. The user must refer to the manual for specific Warning or
Caution information to avoid personal injury or damage to the product.
vii
About this Guide
About this Guide
Overview
This User’s Guide is a supplement to the Manuals currently supplied with the HP/
Agilent 8922 GSM Test Sets. The information contained in this User’s Guide is
only relevant to the additional features of the Multi-Band Test System. For more
information on the HP/Agilent 8922 and HP/Agilent 83220, refer the following
Guides;
❒ Agilent 8922M⁄S User’s Guide
❒ Agilent 8922M⁄S Programming Reference Guide
❒ Agilent 83220A⁄E User’s Guide
Systems Covered
The following table details the product options and HP/Agilent 8922 Multi-Band
Test Systems covered by this User’s Guide.
Multi-Band System Types Covered
Required Options
HP/Agilent
8922P
8922M
Option 010
+
83220E
Option 010
HP/Agilent
8922R
8922S
Option 010
+
83220E
Option 010
HP/Agilent
8922X
8922M
Option 010
+
83220A
Option 010
HP/Agilent
8922Y
8922S
Option 010
+
83220A Option
010
User’s Guide - Abbreviations
For clarity, and unless otherwise stated, the following abbreviations will be used;
HP/Agilent 8922M/S Option 010
HP/Agilent 83220A/E Option 010 This will be abbreviated to HP/Agilent 83220
This will be abbreviated to HP/Agilent 8922
viii
Contents
About this Guide viii
1 Configuring the HP/Agilent 8922 Multi-Band Test System 1
Before You Start 2
Connection Overview 3
Connection Details 4
Calibration Routine 7
Zero the Power Meter 9
2 How to Section 13
Power-up and Operating Mode Selection 14
Establishing a Call 15
Making Measurements in the E-GSM900 Band 16
Changing Band 17
Making Measurements in the DCS1800 Band 19
Ending A Call 20
3 Screens 21
Cell Configuration Screen 22
Cell Status Screen - Active Cell 23
Cell Status Screen - Test Mode 24
Configure Screen 25
Dual Band Control Screen 26
Error and Help Screens 31
MS Information/Signaling Screen 32
Contents-1
Contents
4 GPIB Commands 33
Additional Commands to existing subsystems 34
Dual Band Control Subsystem 36
GPIB Programming Example Overview 39
Example 40
GPIB Commands for Including Power Zeroing in an Automatic Test
Routine 44
5 System Specifications 45
Supplemental Characteristics (shown in italics) 46
GSM Functionality Specifications 47
RF Generator Specifications 48
10 MHz to 1 GHz Aux RF Out Connector Specifications 50
1710 to 1990 MHz Aux RF Out Connector Specifications (HP/
Agilent 83220A only) 51
0.3 GMSK Modulation Specifications 52
Pulse Modulation Specifications 53
30 dB Pulse Modulation Specifications
(Agilent 8922M Only) 54
RF Analyzer Specifications 55
CW RF Frequency Measurement Specifications 56
CW RF Power Measurement Specifications
(RF in/out) only 57
Peak Transmitter Carrier Power Measurement Specifications (RF in/out)
only 58
Pulse on/off Ratio Measurement Specifications
(requires option 006) 60
Amplitude Envelope Measurement Specifications 61
Phase and Frequency Measurement Specifications 62
Contents-2
Contents
0.3 GMSK Data Recovery Specifications (Agilent 8922M only) 63
FM Demodulation Output Specifications (Agilent 8922M only) 64
Pulse Demodulation Output Specifications (Agilent 8922M only) 65
Output RF Spectrum Measurement Specifications (requires option 006) 66
Spectrum Analyzer Specifications
(requires option 006) 67
Audio Source Specifications 68
Audio Analyzer Specifications 69
Oscilloscope Specifications 71
Remote programming 72
Printer Support 73
General Specifications 74
Reference Specifications 75
6 How To Return Equipment for Repair 77
Return Procedure 78
Sales and Service Offices 79
7 Appendix A - Establishing Absolute GSM BCH Power Level 81
Procedure 82
Contents-3
Contents
Contents-4
1
Configuring the HP/Agilent 8922 Multi-Band
Test System
This section provides information on connecting and setting up of the HP/
Agilent 8922 Multi-Band Test System.
1
Configuring the HP/Agilent 8922 Multi-Band Test System
Before You Start
Before You Start
Before connecting the HP/Agilent 8922 or HP/Agilent 83220 to each other or to
the line (mains) voltage, ensure you have read and familiarized yourself with the
section, Installing Your HP/Agilent 83220A/E, in the
Guide.
WARNING: The HP/Agilent 8922 and HP/Agilent 83220 are Safety Class 1 products (provided
with a protective earth terminal). A safety earth ground must be provided from the
mains power source to the product input wiring terminals, power cord, or supplied
power cord set. Whenever it is likely that the protection has been impaired, the HP/
Agilent 8922 Multi-Band Test System must be made inoperative and be secured
against any unintended operation.
Agilent 83220A⁄E User’s
WARNING: If the HP/Agilent 8922 or HP/Agilent 83220 are to be energized by means of an
external autotransformer for voltagereduction, make sure that the common terminal
is connected to the neutral pole of the power source.
2
Configuring the HP/Agilent 8922 Multi-Band Test System
Connection Overview
Connection Overview
Connecting the HP/Agilent 8922 to the HP/Agilent 83220 is very similar to
connecting a Standard HP/Agilent 8922 Test System. The main difference being
that an additional cable is used between the HP/Agilent 8922 and the HP/
Agilent 83220. Testing of mobiles in all bands is now carried out from a single
port on the HP/Agilent 83220.
To configure the HP/Agilent 8922 Multi-Band Test System for making
measurements, there are three main stages;
1 Connect the HP/Agilent 8922 to the HP/Agilent 83220. Refer to ‘Connection
Details’ on page 4
2 Carry out a system calibration process. Refer to ‘Calibration Routine’ on page 7
onwards for more information.
and onwards for more information.
3 Zero the power meter. Refer to ‘Zero the Power Meter’ on page 9 for more information.
NOTE: If the HP/Agilent 8922 and the HP/Agilent 83220 are not connected properly an error
message will appear during power-up. Check all connections and switch the HP/
Agilent 8922 off and then on again. If the error message still appears contact your local
sales and service office for more assistance.
For additional information about connections and setting up, refer to the
appropriate sections in the Agilent 8922M⁄S User’s Guide and the Agilent
83220A⁄E User’s Guide
3
Configuring the HP/Agilent 8922 Multi-Band Test System
Connection Details
Connection Details
WARNING:
DO NOT CONNECT
DUT / MOBILE TO
THIS PORT
1
2
3
4
CONNECT MOBILE HERE
76 58
1. HP 8922 IF Link Port
The main port connecting the HP/Agilent 8922 to the HP/Agilent 83220. This
port is used for providing the E-GSM900 and GSM900 link between the HP/
Agilent 8922 and the HP/Agilent 83220.
WARNING: Donot connectthe device-under-test (DUT)to thisport as thiscould seriouslydamage
the HP/Agilent 8922.
2. IF Link Cable
The cable that connects the Agilent 8922 and HP/Agilent 83220 IF Link Ports.
3. HP/Agilent 83220 IF Link Port
The main port that connects the HP/Agilent 8922 and HP/Agilent 83220. See 1
above.
4
4. GSM/DCS/PCS RF In/Out Port
This is the main device-under-test (DUT) connection port.
NOTE: Maximum power:
DCS1800 and PCS1900: 2 W, 15 W peak.
GSM900 and E-GSM900: 8 W average.
5. Coupled RF In/Out
The port that connects back to the main RF In/Out port. There is a nominal loss of
7 dB between this port and the main RF In/Out port. This port can be used for;
• Inserting adjacent cell BCH signals for monitoring by the mobile.
• Co-channel interference measurements.
Configuring the HP/Agilent 8922 Multi-Band Test System
Connection Details
• Connecting to an external spectrum analyzer, while maintaining mobile connections.
This port should always be terminated with 50 Ω.
NOTE: The maximum input power to be applied to this port is 200 mW.
6. Aux RF In and Aux RF Out Connections
These two connections are the same as those on the Standard HP/Agilent 8922
Test System. Refer to the Agilent 83220A⁄E User’s Guide for more information.
NOTE: Please use the supplied BNC cables for these connections. If your installation requires
longer cable lengths, ensure they are of double screened construction.
7. 1710-1990 MHz Aux RF In & Aux RF Out Ports
These ports are only found on the HP/Agilent 83220A and are not useable during
multi-band operation.
5
Configuring the HP/Agilent 8922 Multi-Band Test System
Connection Details
8. RF In/Out Path Diagram
The diagram on the front panel of the HP/Agilent 83220 shows the signal path
between the RF In/Out port, the coupled RF In/Out port and the HP/Agilent 8922.
Rear Panel Connections
All rear panel connections between the HP/Agilent 8922 and HP/Agilent 83220
are the same as those of a Standard HP/Agilent 8922 Test System. Refer to the
Agilent 83220A⁄E User’s Guide for more information on rear panel connections.
HP/Agilent 83220A/E Connections HP/Agilent 8922M/S Connections
AM AM
SCOPE SCOPE
10 MHz IN 10 MHz OUT
PCN INTERFACE PCN INTERFACE
6
Configuring the HP/Agilent 8922 Multi-Band Test System
Calibration Routine
Calibration Routine
Once the HP/Agilent 8922 Multi-Band Test System has been connected, the
system must be calibrated. The calibration routine can be used for both the HP/
Agilent 83220A and the HP/Agilent 83220E.
NOTE: The calibration routine must be run whenever one or more of the following situations arise:
❒ An HP/Agilent 83220 is first connected to an HP/Agilent 8922.
❒ When a different, or upgraded, HP/Agilent 83220 is connected to an HP/Agilent 8922.
❒ If different IF Link or Aux RF In/Out cables are used.
❒ After a RAM Initialize or Firmware Upgrade.
❒ Need to trouble shoot the system or localize faults.
Procedure
1 Ensure you have the following parts1:
• 6 dB coaxial attenuator (SMA)
• BNC to SMA adapter
• N-type to SMA adapter
• BNC to BNC cable (minimum length 1.2m)
2 Ensure that the Coupled RF In/Out Port is terminated by 50 Ω (supplied with test
system).
3 Switch on the HP/Agilent 8922 Multi-Band Test System.
4 Select from the To Screen.
5 Select Compatible field and change to or , if required.
6 Power cycle the system.
7 Press the front panel key.
8 Set Location to ROM
9 Select Procedure field.
10 Select the test routine SYS_CAL.
11 Run the program by either selecting the Run Test field or by pressing .
CONFIG
8922E 8922G
TESTS
L1
1. These are a list of parts included in the calibration kit - HP/Agilent 8922U Option 104.
7
Configuring the HP/Agilent 8922 Multi-Band Test System
Calibration Routine
12 Using the parts listed, follow the instructions given on the display.
13 Once this calibration process is completed, you are asked to power cycle the system.
Before doing this, return the Compatible field back to the original state (Step 4
through to 6).
WARNING: If RAM Initialize is carried out, the offset calibration values will be erased. This
will result in unexpected and uncalibrated results.
Repeat the calibration process to restore the offset calibration values.
Default Start Up Mode
Once the system has been connected and calibrated, it is possible to set up which
radio mode the system will always start up with.
The start up radio mode is set using the service latch default_radio_mode.
This latch can be set from the service screen. The following table lists the options
for this service latch.
Radio Mode Latch Value
GSM900 0
E-GSM900 1
DCS 1800 2
PCS 1900 3
The HP/Agilent 8922 Multi-Band Test System will return to the
default_radio_mode after;
• The system has been switched off and on.
• Press .
• Using GPIB code *RST.
PRESET
8
Configuring the HP/Agilent 8922 Multi-Band Test System
Zero the Power Meter
Zero the Power Meter
The HP/Agilent 8922 and HP/Agilent 83220 each have independant power
meters. When testing a mobile in the GSM900 (and E-GSM) band the HP/Agilent
8922 power meter is used to measure the transmitted power levelfrom the mobile,
and when testing a mobile in the DCS1800 band the HP/Agilent 83220 power
meter is used. To ensure that both instruments’ power meters function correctly,
they must be zeroed before instrument operation and then regularly in subsequent
operation to guarantee continued measurment accuracy.
NOTE: Failure to regularly zero the HP/Agilent 8922 and HP/Agilent 83220 power meters results
in measurment inaccuracies after a long period of time. Although both instruments are
always zeroed prior to shipping from the factory, they still require their power meters to be
regularly zeroed to guarantee measurement accuracy. It is recommended that the power
meters are zeroed on a weekly basis as a minimum. Note that it is not a requirement to zero
the power meter for every mobile that is tested.
To Zero the Power Meter of the HP/Agilent 8922
1 Ensure that no external instruments, test devices or mobiles are connected to the HP/
Agilent 8922 Multi-Band Test System.
2 Switchon the HP/Agilent 8922 Multi-Band Test System, navigateto the CONFIGURE
screen, select the Radio Type and set it to GSM900 or E-GSM.
3 Press the front panel to display the Cell Status screen and select the
Pwr Zero
Power Zero
field.
CELL
CNTL
9
Configuring the HP/Agilent 8922 Multi-Band Test System
Zero the Power Meter
4 Once selected, the power meter will automatically zero.
To Zero the Power Meter of the HP/Agilent 83220
NOTE: In Dual-Band test mode the Test Set is initially set to E-GSM and in this mode the power
zero is applied only to the HP/Agilent 8922 Power Meter. Because of this, the HP/Agilent
83220 Power Meter must be zeroed separately by setting the Radio Type to DCS1800.
1 Ensure that no external instruments, test devices or mobiles are connected to the HP/
Agilent 8922 Multi-Band Test System.
2 Switchon the HP/Agilent 8922 Multi-Band Test System, navigateto the CONFIGURE
screen, select the Radio Type and set it to DCS1800 or PCS1900.
3 Press the front panel to display the Cell Status screen and select the
Pwr Zero
field.
CELL
CNTL
Power Zero
4 Once selected, the power meter will automatically zero.
For details of recommended GPIB commands for including power zeroing in the
initialization routine for testing of Dual-Band type mobiles, see “GPIB
Commands for Including Power Zeroing in an Automatic Test Routine” on
page 4-44.
10
Configuring the HP/Agilent 8922 Multi-Band Test System
Zero the Power Meter
Checking the Current Status of the Power Meters
Use the following simple, manual method to check the current status of your Test
Set using a Dual-Band mobile:
1 Press the front panel to display the Cell Status screen and set the Operating
Mode to E-GSM.
2 Connect the mobile to the Test Set RF In port, power it on and wait for it to camp-on to
the Test Set BCH.
3 Establish a call and note the value of the Peak Power (Fast Power) measurement center
screen.
4 End the call and power off the mobile.
5 Remove the connection to the front panel to ensure no RF power.
6 Press the front panel to display the Cell Status screen and select the
Pwr Zero
field.
CELL
CNTL
CELL
CNTL
7 Repeat steps 2 and 3.
8 Compare the two Peak Power measurements. Any difference is most probably due to
the Power Zero meter.
9 Repeat steps 1 through 8 for the Radio Type set to DCS1800 (that is, to check the HP/
Agilent 83220 power meter).
11
Configuring the HP/Agilent 8922 Multi-Band Test System
Zero the Power Meter
12
2
How to Section
This section describes some of the basic procedures that may be required while
operating the HP/Agilent 8922 Multi-Band Test System. For more details on
operating procedures, refer to the Agilent 8922M⁄S User’s Guide.
NOTE: Before trying these procedures, you should be in E-GSM900 mode for multi-band
operation.
13
How to Section
Power-up and Operating Mode Selection
Power-up and Operating Mode Selection
This section describes the procedure for powering up the HP/Agilent 8922
Multi-Band Test System and then establishing a call with an attached mobile.
1 Power on HP/Agilent 8922 Multi-Band Test System and observe display.
2 The system start up cycle will be suspended and an error message will be displayed if
the HP/Agilent 83220 is not connected, or isnot operatingproperly. Checkconnections
and instrument, then power cycle the system.
3 Select E-GSM radio mode from the cell status screen.
NOTE: This step can be avoided if the default start up mode has already been set. Refer to Default
Start Up Mode on page 8 for more information about setting this service latch.
4 Connect the mobile to RF IN/OUT port located on the front panel of the HP/
Agilent 83220 (refer to 4. GSM/DCS/PCS RF In/Out Port on page 5 for more
information about this port).
5 Switch on the mobile.
6 The mobile should then camp onto the E-GSM900 broadcast channel. This is indicated
by the mobile displaying 001-01.
Potential Problems
If a phase-11 mobile is being tested and E-GSM mode is selected the mobile will
not be able to camp on. To check the type of mobile being used, power cycle the
instrument and try to camp on while in GSM900 mode.
1. A mobile that is only compliant to phase 1 of the ETSI specifications.
14
How to Section
Establishing a Call
Establishing a Call
This procedure is identical to that of a Standard HP/Agilent 8922 Test System.
1 Once the mobile has been connected and camped on to the HP/Agilent 8922
Multi-Band Test System, key in any number on the mobile.
2 Now initiate the call from the mobile. The display on the HP/Agilent 8922 should now
show that the call status is CONNECTED.
Potential Problems
If a call is not established, the uplink power may differ from the HP/Agilent
8922’sexpected input level. The most likely reason for this type of problem is that
the mobile or the IF Link cable has not been calibrated. Refer to Calibration
Routine on page 7 for more details on calibrating the IF Link cable.
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How to Section
Making Measurements in the E-GSM900 Band
Making Measurements in the E-GSM900 Band
The procedures for making measurements in the E-GSM900 band are the same as
those used for a Standard HP/Agilent 8922 Test System. Refer to the Agilent
8922M⁄S User’s Guide for more information.
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