HP 11757B Use and care manual

Printed in USA March 2000
Notice
Hewlett-Packard to Agilent Technologies Transition
This documentation supports a product that previously shipped under the Hewlett-
Packard company brand name. The brand name has now been changed to Agilent
Technologies. The two products are functionally identical, only our name has changed. The
document still includes references to Hewlett-Packard products, some of which have been
transitioned to Agilent Technologies.

front_757_58.fm5 i Tue Oct 20 16:05:31 1998
HP 11757B
Multipath Fading Simulator
Installation and Calibration Guide
HP Part No. 11757-90058
Printed in UK
October 1998
© Copyright Hewlett-Packard Ltd. 1998

front_757_58.fm5 ii Tue Oct 20 16:05:31 1998
ii
Notice The information contained in this document is subject to change without notice.
Hewlett-Packard shall not be liable for errors contained herein or for incidental or
consequential damages in connection with the furnishing, performance, or use of this
material.
This document contains proprietary information which is protected by copyright. All
rights are reserved. No part of this document may be photocopied or reproduced
without the prior written consent of the manufacture, Hewlett-Packard Ltd.
© Copyright Hewlett-Packard Ltd. 1998.
All Rights Reserved. Reproduction, adaptation, or translation without prior written
permission is prohibited, except as allowed under the copyright laws. Station Road,
South Queensferry, Scotland, EH30 9TG, UK.

2Chapter1
Contacting Agilent
By internet, phone, or fax, get assistance with all your test and measurement needs.
Table 1-1 Contacting Agilent
Online assistance: www.agilent.com/find/assist
United States
(tel) 1 800 452 4844 Latin America (tel) [phone]
(fax) [phone]
Canada
(tel) 1 877 894 4414
(fax) [phone]
Europe
(tel) ([phone]
(fax) ([phone]
New Zealand
(tel) 0 800 738 378
(fax) ([phone]
Japan
(tel) ([phone]
(fax) ([phone]
Australia
(tel) 1 800 629 485
(fax) ([phone]
Asia Call Center Numbers
Country Phone Number Fax Number
Singapore 1-800-375-8100 (65) 836-0252
Malaysia 1-800-828-848 1-800-801664
Philippines (632) 8426802
1-800-16510170 (PLDT
Subscriber Only)
(632) 8426809
1-800-16510288 (PLDT
Subscriber Only)
Thailand [phone] (outside Bangkok)
[phone] (within Bangkok) (66) 1-661-3714
Hong Kong 800-930-871 (852) 2506 9233
Taiwan 0800-047-866 (886) 2 25456723
People’s Republic
of China 800-810-0189 (preferred) 10800-650-0021 10800-650-0121
India 1-600-11-2929 000-800-650-1101

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iii
Declaration of Conformity
Declaration of Conformity
Europe Contact::
Your Local Hewlett-Packard Sales and Service Office or Hewlett-Packard GmbH, Department 2Q / Standards
Europe Herrenberger Strasse 130, D7030 Boblinger (Fax: [phone])
Declaration of Conformity
according to ISO/IEC Guide 22 and EN45014
Manufacturer’s Name: Hewlett-Packard Ltd.
Queensferry Microwave Division
South Queensferry
West Lothian, EH30 9TG
Scotland, United Kingdom
Manufacturer’s Address:
Declares that the product
Product Name:Multipath Fading Simulator
Model Number: HP 11757B
Product Options: This declaration covers all options of the above product as detailed in
TCF A-5951-9852-02
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: Electromagnetic Compatibility (EMC)
Technical Construction File (TCF) No. A-5951-9852-02
Assessed by: DTI Appointed Competent Body
EMC Test Centre,
GEC-Marconi Avionics Ltd.,
Maxwell Building,
Donibristle Industrial Park,
KY11 5LB
Scotland, United Kingdom
Technical Report Number:6893/2201/CBR, dated 23 September 1997
Supplementary Information:
The product conforms to the following safety standards:
EN 61010-1(1993) / IEC 1010-1(1990) +A1(1992) +A2(1995)
CSA-C22.2 No. 1010.1-93
EN 60825-1(1994) / IEC 825-1(1993)
The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC, and carries the CE
marking accordingly.
South Queensferry, Scotland 01 October 1998
Location Date R.M. Evans / Quality Manager

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General Safety Information
General Safety Information
The following general 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. Hewlett-
Packard Company 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 powercord). 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 NOT perform procedures involving cover or shield removal unless 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 a Hewlett-Packard Sales and Service
Officeforserviceandrepairtoensurethesafetyfeaturesaremaintained.
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 a Hewlett-Packard
Sales and Service Office for service and repair to ensure the safety features are
maintained.

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General Safety Information
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.
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
performed 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
performed or adhered to could result in damage to or destruction of the instrument. Do not
proceed beyond a caution 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 layed out by them.
The C-Tick mark is a registered trademark of the Spectrum Management Agency of Aus-
tralia. This signifies compliance with the Australian EMC Framework Regulations under
the terms of the Radiocommunications Act of 1992.
This symbol indicates the position of the operating switch for ‘Off’ mode. NOTE: To
ensure instrument is isolated from mains, always rempve the appliance coupler (mains
power cord) from the power source.
This symbol indicates the position of the operating switch for ‘On’ mode.
This symbol indicates the position of the operating switch for ‘Stand-by’ mode. Note, the
instrument is NOT isolated from the mains when the switch is in this position.
To isolate the instrument, the mains coupler (mains input cord) should be removed from
the power supply.

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vi
Safety Considerations
Safety Considerations
This productand related documentation must be reviewed for familiarization with
safety markings and instructions before operation.
This product is a Safety Class I system (provided with a protective earth terminal).
Before Applying
Power Verify that the product is set to match the available line voltage and the correct fuses
are installed.
Safety Earth
Ground An uninterruptable saftey earth ground must be provided from the main power source
to the product input wiring terminls, power cable, or supplied cable set.
WARNING: Any interruption of the protective (grounding) conductor (inside or outside the
system) or disconnecting the proctective earth terminal will cause a potential
shock hazard the could result in personel industry.(Grounding one conductor of
a two conductor outlet is not sufficient protection.) In addition, verify that a
comon ground exists between the unit under test and the system prior to
energizing either unit.
Servicing instructions are for use by service-trained personnel only. To avoid
dangerous electric shock, do not perform any servicing unless qualified to do so.
Adjustments described in the manual are performed with the power supplied to
the system’s instuments while protective covers are removed. Energy available
at many points may, if contacted, result in personal injury.

Installation and Calibration
Introduction
This section provides the information needed to install
the HP 11757B Multipath Fading Simulator. Included
is information pertinent to initial inspection, p ower
requirements, line voltage selection, power cables,
interconnection, environment, instrument mounting,
storage, and shipment. In addition, this section contains
the pro cedures for selecting the imp edance of the
instrument inputs and setting the HP-IB address.
Initial Inspection
Warning
Toavoid hazardous electrical shock, do not turn on the
instrument when there are signs of shipping damage
to any portion of the outer enclosure (co
vers, panels,
display).
Inspect the shipping container for damage. If the
shipping container or cushioning material is damaged, it
should be kept until the contents of the shipmenthave
been checked for completeness and the instrument has
been checked mechanically and electrically. Pro cedures
for checking electrical p erformance are given in the
service manual as well as in the automated p erformance
tests found in this manual. If the contents are
incomplete, if there is mechanical damage or defect, or if
the instrument do es not pass the electrical p erformance
1

Installation and Calibration HP 11757B
tests, notify the nearest Hewlett-Packard oce. If
the shipping container is damaged, or the cushioning
material shows signs of unusual stress, notify the carrier
as well as the Hewlett-Packard oce. Keep the shipping
materials for the carrier's insp ection.
Preparation for Use
Warning
Toavoid damage to the instrument make sure that the
voltage selection switch on the back of the instrument is
set properly.
This is a Safety Class I product (that is, it is pro
vided
with a protective earth terminal). An uninterruptible safety
earth ground must be provided from the main power
source to the product input wiring terminals through the
power cable or supplied power cable set. Whenever it is
likely that the protection has been impaired, the product
must be made inoperative and be secured against any
unintended operation.
If this instrument is to be energized via an external
autotransformer, make sure the autotransformer's
common terminal is connected to neutral (that is, the
grounded side of the line (Mains) supply.)
Installation Checklist
Before plugging the Fader into the line (Mains) voltage,
ensure the following steps are taken:
1. Check the line (Mains) voltage to ensure
compatibility with the Fader requirements.
2. Check the line voltage switch on the Fader's rear
panel to ensure prop er selection for the line (Mains)
voltage.
2

HP 11757B Installation and Calibration
3. Ensure that the p ower cable to b e used is the required
type.
Caution
BEFORE PLUGGING THIS INSTRUMENT into the
line (Mains) voltage, make sure that the correct voltage
and fuse have been selected.
4. Plug in the p ower cable.
Cooling
To provide adequate co oling, an air gap of approximately
75mm should b e maintained around the instrument.
Power Requirements
The Fader requires a p ower source of 115 or
230 6 10% Vac, 50 to 60 Hz.
Power consumption is < 200 VA.
Line Voltage Selection
Caution
BEFORE PLUGGING THIS INSTRUMENT into
the line (Mains) voltage, make sure that the correct
operating voltage and fuse has been selected.
1. On the rear panel of the Fader is a red recessed
switch for selecting the op erating voltage. It is
lab eled Voltage Selector. Check the switch setting to
see if it reads 115V or 230V (only the voltage selected
is visible).
2. If the voltage switch is set improp erly, use a ngernail
or a small athead screwdriver to switch it to the
correct setting.
3

Installation and Calibration HP 11757B
Figure 1-1. Voltage Selection
Fuse Replacement
Tocheck or replace the fuse:
1. Remove the p ower cable from the back panel of the
Fader.
2. The plastic receptacle into which the power cable is
plugged contains a small drawer containing the fuse.
This drawer cannot b e op ened when the p o
wer cord
is connected to the back panel of the Fader. Beneath
the center prong (ground) is a tab. At the bottom of
the plastic receptacle is another tab.
3. With your ngers or a small athead screwdriver pull
back on the tabs. The drawer will op en.
Note
The fuse is disconnected from the circuit when the
drawer is opened. You can check the fuse with a
continuity light to see if it has opened without remo
ving
the fuse from the drawer.
4. Using a screwdriver push either end of the fuse down
from aboveuntil the other end pops up.
5. Remove the fuse from ab ove with your ngers or
needlenose pliers.
6. Place the new fuse into the slot and close the fuse
drawer.
4

HP 11757B Installation and Calibration
Note
The fuse should b e an IEC approved 5 by20 mm
ceramic case, sand lled 5 Amp 250V Fast Blow. If your
instrument is new, there will b e a spare fuse in the fuse
drawer. The fuse drawer has a slot for storing an extra
fuse.
7. Reconnect the p ower cord.
Figure 1-2. Fuse assembly
Power Cables
Warning
BEFORE CONNECTING THIS INSTRUMENT, the
protective earth terminals of this instrument must be
connected to the protective conductor of the line (Mains)
power cable. The line plug shall only be inserted in a
socket outlet provided with a protective earth contact.
The protective action must not be negated by the use
of an extension cord (power cable) without a protective
conductor (grounding). Grounding one conductor of a two
conductor outlet is not sufficient protection.
5

Installation and Calibration HP 11757B
This instrument is equipp ed with a three-wire power
cable. When connected to an appropriate ACpower
receptacle, this cable grounds the instrumentchassis.
The type of power cable plug shipped with each
instrument depends on the country of destination. See
gure 1-3, \Power Cable and Line (Mains) Plug Part
Numb ers", for the part numbers of these power cables.
Cables are available in dierent lengths and some with
right angle plugs to the instrument. Check with your
nearest Hewlett-Packard service center for descriptions
and part numbers for these cables.
6

HP 11757B Installation and Calibration
Figure 1-3. Power Cable and Line (Mains) Plug Part Numbers
7

Installation and Calibration HP 11757B
HP-IB Address Selection and Configuring
HP-IB Address Selection
The HP-IB address is selectable from the front panel.
When shipped from the factory the address of the
instrument is 14. HP-IB addresses from 00 to 30 as well
as 40 (listen only) and 50 (talk only) can b e used. A list
of allo wable addresses is given in table 1-1.
Use the following pro cedure to set the HP-IB address:
1. Press 4
SHIFT
54
PRESET/LOCAL
5 (the MORE function).
2. Press 4
85
or 4
95
until the display reads \5 HP-IB
ADRS".
3. Press the 4
ENTER
5 key. The display will read
\ADDRESS 14"
4. Press 4
85
, 4
95
, 4
6
5 or 4
7
5 until the desired HP-IB
address is displayed.
5. Press the 4
ENTER
5 key.
8

HP 11757B Installation and Calibration
Table 1-1.
Allowable HP-IB Address Codes
Talk
Address
Character
Listen
Address
Character
Decimal
Equiv-
alent
@ SP 0
A ! 1
B " 2
C # 3
D $ 4
E % 5
F & 6
G ' 7
H ( 8
I ) 9
J * 10
K + 11
L , 12
M - 13
N . 14
1
O / 15
P 0 16
Q 1 17
R 2 18
S 3 19
T 4 20
U 5 21
V 6 22
W 7 23
X 8 24
Y 9 25
Z : 26
[ ; 27
g < 28
] = 29
^ > 30
1
Factory-set Fading Simulator address.
9

Installation and Calibration HP 11757B
Interconnections
Interconnection data for the Hewlett-Packard Interface
Bus is provided in gure 1-4, Hewlett-Packard Interface
Bus Connection.
HP-IB Interface Connector
The HP-IB mating connector is shown in gure 1-4,
Hewlett-Packard Interface Bus Connection. Note that
the two securing screws are metric.
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HP 11757B Installation and Calibration
Logic Levels
The Hewlett-Packard Interface Bus Logic Levels are TTL compatible, i.e., the true (1)
state is 0.0 Vdc to +0.4 Vdc and the false (0) state is +2.5 Vdc to +5.0 Vdc.
Mating Connector
HP 1251-0293; Amphenol 57-30240.
Mating Cables Available
HP 10833A, 1 metre (3.3 ft), HP 10833B, 2 metres (6.6 ft)
HP 10833C, 4 metres (13.2 ft), HP 10833D, 0.5 metre (1.6 ft)
Cabling Restrictions
1. A Hewlett-Packard Interface Bus system may contain no more than 2 metres (6.6
ft) of connecting cable p er instrument.
2. The maximum accumulative length of connecting cable for any Hewlett-Packard
Interface Bus system is 20.0 metres (65.6 ft).
Figure 1-4. Hewlett-Packard Interface Bus Connection
11

Installation and Calibration HP 11757B
Coaxial Connectors
The IF INPUT and the IF OUTPUT on the front
panel, and the AUX IF OUT on the rear panel require
75 BNC male mating connectors compatible with the
specications of US MIL-C-39012.
IF Input Signal
The best Fader p erformance is found at IF INPUT levels
of 0 8 dBm. Performance is very go o d to 0 3 dBm. If
you have a more powerful signal use an attenuator before
inputting it to the IF Input of the F
ader. If you havea
signal that is muchweaker than 0 8 dBm, consider using
an amplier.
Caution
Do not input power exceeding +20 dBm to the IF Input
of the Fader. This could damage the instrument.
Error Pulse Input
The error pulse input is internally congurable to the
following:
ECL 75 (default)
TTL 75
TTL 10k
Variable threshold, -2 volt termination, 75
Variable threshold, 0 volt termination, 75
Variable threshold, 0 volt termination, 10k
To make the appropriate setting press the 4
RADIO SETUP
5
key, and then press 4
85
until 1 ERROR TERM is
displayed. Press 4
ENTER
5 and use 4
85
to toggle through
the options listed ab ove. Press 4
ENTER
5 again when you
have the correct input for your radio.
After selecting one of the options listed ab ove and
pressing 4
ENTER
5 , the selection 1.1 ERROR THR
is displayed. Press 4
ENTER
5 and change the trigger
12