HP 8568b Installation Manual

Errata

8568B Spectrum Analyzer Installation and Verification Manual

08568-90119

September 1993

Title & Document Type:

Manual Part Number:

Revision Date:

HP References in this Manual

This manual may contain references to HP or Hewlett-Packard. Please note that HewlettPackard's former test and measurement, semiconductor products and chemical analysis businesses are now part of Agilent Technologies. We have made no changes to this manual copy. The HP XXXX referred to in this document is now the Agilent XXXX. For example, model number HP8648A is now model number Agilent 8648A.

About this Manual

We’ve added this manual to the Agilent website in an effort to help you support your product. This manual provides the best information we could find. It may be incomplete or contain dated information, and the scan quality may not be idea l. If we find a better copy in the future, we will add it to the Agilent website.

Support for Your Product

Agilent no longer sells or supports this product. You will find any other available product information on the Agilent Test & Measurement website:

www.tm.agilent.com

Search for the model number of this product, and the resulting product page will guide you to any available information. Our service centers may be able to perform calibration if no repair parts are needed, but no other support from Agilent is available.

Installation and Verification Manual

HP 8568B Spectrum

Analyzer

Includes Option 001, Option 400, Option 462, and Option 857

HP Part No. 08568-90119 Printed in USA September 1993

Notice.

The information contained in this document is subject to change without notice.

Hewlett-Packard 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. 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.

1400 Fountaingrove Parkway, Santa Rosa CA, 95403-1799, USA

Certification

Hewlett-Packard Company certifies that this product met its published 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.

Warranty

This Hewlett-Packard instrument product is warranted against defects 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 Hewlett-Packard. Buyer shall prepay shipping charges to Hewlett-Packard and Hewlett-Packard shall pay shipping charges to return the product to Buyer. However, Buyer shall pay all shipping charges, duties, and taxes for products returned to Hewlett-Packard from another country.

Hewlett-Packard warrants that its software and firmware designated by Hewlett-Packard for use with an instrument will execute its programming instructions when properly installed on that instrument. Hewlett-Packard 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. HEWLETT-PACKARD SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

EXCLUSIVE REMEDIES

THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE REMEDIES. HEWLETT-PACKARD SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.

. . . III

Assistance

Product wmintenance agreements and other customer assistance agreements are available for

Pbr

any assistance, contact pour nearest

Service

Ome.

Hewlett-Rzckard

Hewlett-Fbckard

products.

Sales and

Safety Notes

Caution

Warning

Instruction

Manual

The following safety notes are used throughout this manual. Familiarize yourself with each of the notes and its meaning before operating this instrument.

Caution denotes a hazard. It calls attention to a procedure that, if

not correctly performed or adhered to, could result in damage to or destruction of the instrument. Do not proceed beyond a caution sign until the indicated conditions are fully understood and met.

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.

The instruction manual symbol. The product is marked with this symbol when it is necessary for the user to refer to the instructions in the manual.

General Safety Considerations

Warning

Caution

Before this

properly grounded through the protective conductor of the ac power cable to a socket outlet provided with protective earth contact.

Any interruption of the protective (grounding) conductor, inside or outside the instrument, or disconnection of the protective earth terminal can result in personal injury.

There are many points in the instrument which can, if contacted,

cause personal injury. Be extremely careful. Any adjustments or service procedures that require operation

of the instrument with protective covers removed should be performed only by trained service personnel.

Before this

circuitry has been adapted to the voltage of the ac power source.

Failure to set the ac power input to the correct voltage could cause damage to the instrument when the ac power cable is plugged in.

instrunwnt

instrument

is switched on, make sure it has been

is switched on, make sure its primary power

How to Use This Guide

This guide uses the

following

conventions:

HP 8568B Documentation Description

8568B

HP 8568B Operating

and Programming

Installation

and Verification

Manual

Front-Panel Key] This represents a key physically located on the

instrument.

Screen Text

Included with the HP Model 8568B spectrum analyzer are manuals: The Installation and Verification, the Operating and Programming Manual, and the Performance Tests and Adjustments Manual.

HP part number 08568-90119 Contents: General information, installation, specifications,

characteristics, and operation verification.

HP part number 08568-90041 Contents: Manual and remote operation, including complete syntax

and command description. pocket-sized Quick Reference Guide, HP part number 5955-8970.

This indicates text displayed on the instrument’s screen.

Accopanying

this manual is the seperate,

8568B

Performance Tests and

Adjustments Manual

HP 85680B RF Section

Troubleshooting and

Repair Manual

HP 85662A IF-Display

Section

Troubleshooting and

Repair Manual

HP part number 08568-90118 Contents: Electrical performance tests and adjustment procedures.

HP part number 85680-90137

Contents: RF section service information.

HP part number 85662-90085 Contents: IF-Display section service information.

Contents

1. General Information

What You’ll Find in This Chapter ...........

Introducing the HP 8568B ...............

Safety

Accessories Supplied ................

Accessories Available ................

Options

Instruments Covered by This Manual ........

Calibration Cycle

HP-IB Address Selection ..............

Bench Operation

Electrostatic Discharge Information ..........

Static-Safe Accessories ...............

Routine Maintenance .................

Cleaning the Display ................

Cleaning the RF Section’s Fan Filter .........

Replacing the RF Section’s Battery .........

Ordering Information .................

Direct Mail Order System ..............

Direct Phone-Order System .............

Returning the Instrument for Service .........

Service lags

Original Packaging .................

Other Packaging

Sales and Service Offices ...............

.......................

......................

Serial Numbers

..................

....................

..................

l-l l-2 l-2

l-2 l-5 1-6 l-7 1-7 l-9

l-9 l-9

l-10 l-11 1-12 1-12 1-13 1-13 1-18 1-18 1-18 1-19 1-19 1-19 1-21 l-22

2. Installation

What You’ll Find in This Chapter ...........

Safety

Preparation for Use

Initial Inspection

Operating Environment ...............

Power Requirements ................

To Install Standard Instruments ............

To Install Option 908 and 913 Instruments .......

To Install Option 010 Instruments ...........

To Set the HP-IB Address ...............

From the Front Panel ................

From the HP-IB Bus ................

From the HP-IB Address Switch

.......................

..................

...........

2-l

2-3 2-3 2-3 2-3 2-4 2-7

2-13 2-20 2-20 2-20

2-20

Contents-l

3. Specifications

Introduction ..................... 3-l

Frequency ......................

Measurement Range ................ 3-l

Displayed Values ..................

Center Frequency ................. 3-l

Range ......................

Readout Accuracy ................

Frequency Span ..................

Range ......................

Full Span

Frequency Count ..................

Resolution .....................

Resolution Bandwidth ...............

Resolution Bandwidth (Option 462 6 dB Bandwidths)

Resolution Bandwidth (Option 462 Impulse

Bandwidths) .................

Bandwidth Shape .................

Stability ......................

Residual FM ...................

Spectral Purity ...................

Power-Line-Related Sidebands ...........

Amplitude ......................

Measurement Range ................

Amplitude Measurement Range ..........

Displayed Values ..................

Scale ......................

Accuracy .....................

Reference Lines Accuracy ..............

Dynamic Range ...................

Spurious Responses ................

Residual Responses ................

Gain Compression ................

Displayed Average Noise Level (Sensitivity) ....

Amplitude Uncertainty ................

Table Footnotes ...................

Marker ........................

Sweep ........................

Inputs ........................

INPUT

INPUT outputs

CAL OUTPUT

1STLOOUTPUT : : : : : : : : : :

Options .......................

75 D Input Impedance, Option 001 ..........

400 Hz Power Line Frequency Operation, Option

General .......................

HP-IB Interface Functions ..............

Environmental ...................

Power Requirements ................

#l #2

.......................

INPUT

Power Line Related Sidebands ...........

Temperature ...................

Altitude .....................

....................

.....................

........

....................

400

3-l

3-l 3-2 3-2 3-2 3-2 3-3 3-3

3-3

3-4

3-4 3-4 3-5 3-5 3-5 3-5 3-6 3-6 3-6 3-6 3-6

3-6 3-7 3-7

3-7

3-7 3-8 3-8 3-9

3-11 3-12 3-12 3-13 3-13 3-13 3-14 3-14 3-14 3-14 3-14

3-14 3-15 3-15 3-16

3-16 3-16 3-16 3-16 3-16

Contents-2

Humidity

Operation

Storage EM1 X-Rays

IF Section Serial Prefix 3004A and above

......................

....................

.....................

........................

.......................

......

IF Section Serial Prefix 3001A and below Warm-Up Time

Frequency Reference

Operation

...................

...............

....................

Weight .......................

Dimensions

.....................

4. Characteristics

Frequency

Resolution Stability

......................

.....................

......................

Drift .......................

Spectral Purity

Noise Sidebands

Amplitude

......................

Average Noise Level Log to Linear Switching

...................

.................

................

...............

Frequency Response (Flatness) Uncertainty Residual Responses Third Order Intermodulation Distortion

.................

.......

Inputs ........................

RF INPUTS

Isolation

LO Emission VIDEO IF INP EXT TRIGGER FREQ REFERENCE (IN)

.....................

...................

.....................

INP

.......................

...................

...............

outputs .......................

Display Outputs Recorder Outputs SWEEP VIDEO

PENLIFT

......................

.......................

......................

21.4 MHz IF OUTPUT FREQ REFERENCE (OUT) VIDEO OUT IF OUT

......................

PROBE POWER (front panel)

..................

................

..............

....................

............

General .......................

Acoustic Noise Emission/ Geraeuschemession

Function Descriptions

.................

Sweep .......................

Cathode Ray Tube

Instrument State Storage

Remote Operation

................

.............

................

.....

......

.....

3-16 3-16 3-16 3-16 3-16 3-16 3-16 3-18 3-18 3-18 3-18 3-19

4-l 4-l 4-2 4-2 4-2 4-2 4-3 4-3 4-3 4-3

4-4

4-5

4-5 4-5 4-5

4-5

4-6

4-7

4-8

4-9

4-10 4-10 4-10

Contents-3

5. Operation Verification

What You’ll Find in This Chapter ...........

Test System Configuration Equipment Connections Program Loading Program Operation HP-IB Addresses Error Messages

Test Descriptions

1. Input Attenuator Switching Uncertainty

2. IF Gain Uncertainty

3. Scale Fidelity (Log)

4. Scale Fidelity (Linear) ..............

5. Log Scale Switching Uncertainty .........

6. Resolution Bandwidths ..............

7. Impulse and Resolution Bandwidths (Opt. 462 Impulse Bandwidth)

8. Line Related Sidebands .............

9. Residual FM

10. RF Gain Uncertainty ..............

11. Sweep Time Accuracy ..............

12. Average Noise Level ..............

13. Residual Responses

14. Frequency Span Accuracy ............

15. Frequency Response ..............

16. Second Harmonic Distortion ...........

17. Third Order Intermodulation Distortion

18. Calibrator Output Amplitude Accuracy

...................

....................

...................

...............

................

..................

.....

...............

.....

......

5-l 5-5 5-5

5-7 5-7

5-9 5-10 5-10

5-11

5-12 5-13

5-14 5-15 5-16

5-17

5-18 5-19

5-20 5-21 5-22 5-23 5-24 5-25 5-26

5-27 5-28

Contents-4

Figures

l-l. HP 8568B with Accessories Supplied 1-2. AC Power Cables Available l-3. Typical Serial Number Label 1-4. Static-Safe Workstation 1-5. Display Bezel Screws l-6. Removing the Bottom Cover 1-7. Location of Al5 Controller Assembly l-8. Location of Battery on Al5 Controller Assembly

1-9. Factory Packaging Materials for Each Section 2-l. Rear-Panel Cable Connections 2-2. Voltage Selector Board and Fuse 2-3. Removing the Handles and Trim 2-4. Removing the Information-Card Tray

2-5. Attach the Rack Mount Flanges 2-6. Voltage Selector Board and Fuse 2-7. Rear-Panel Cable Connections 2-8. Removing the Handles and Trim

2-9. Removing the Information-Card Tray 2-10. Attaching the Rack Handles and Flanges 2-l 1. Rear-Panel Cable Connections 2-12. Voltage Selector Board and Fuse 2-13. Attaching the Inner-Member Brackets 2-14. Slide Adapter for Non-HP System Rack Cabinets 2-15. Removing the Bottom Cover 2-16. Location of Al5 Controller Assembly 2-17. Address Switch (Shown in Factory Preset Position) . . 2-18. Address Switch Set to 4

3-l. Instrument Dimensions with Handles

3-2. Instrument Dimensions without Handles

4-l. Typical Spectrum Analyzer Resolution

4-2. Single Sideband Noise Normalized to 1 Hz BW versus

Offset from Carrier 4-3. Typical Sensitivity vs. Input Frequency 4-4. Typical Optimum Dynamic Range 5-l. Dual Bus (MTS) System Connection 5-2. Single Bus System Connection 5-3. RF Input and Calibration Controls

................

.............

............

...............

............

...............

............

.........

........

...

.....

...........

........

...........

........

.......

...........

........

...

........

.......

........

.......

..........

.........

..........

l-3 l-4

l-8 l-10 1-12 l-14 1-15 1-16 l-20

2-4 2-5 2-7 2-8

2-9 2-10 2-11 2-13 2-14 2-15 2-15 2-16 2-17 2-18 2-21 2-22 2-23 2-24 3-19

3-19

4-1

4-2

4-3

4-4

5-6

5-9

Contents.5

‘Ifibles

1- 1. Static-Safe Accessories .........

l-2. Factory Packaging Materials

l-3. Hewlett-Packard Sales and Service Offices 2-l. Decimal and Binary Address Codes

5-l. Tests Performed ............

5-2. Tests Not Performed ..........

5-3. Equipment Summary ..........

5-4. HP-IB Addresses ............

.......

...

......

...... 5-3

......

...... 5-4

......

l-11 l-20 l-23

2-25

5-4

5-9

Contents-6

General Information

What You’ll Find in This Chapter

This chapter introduces you to the HP 8568B spectrum analyzer

and its options and accessories. Refer to Chapter 2 for information on inspecting and installing the HP 8568B. Refer to Chapter 3 and Chapter 4 for a complete listing of instrument specifications and characteristics. Refer to Chapter 5 for Operation Verification.

Introducing the HP 8568B ............................

Safety Accessories Supplied Accessories Available

Options ...........................................

Instruments Covered by This Manual

Calibration Cycle HP-IB Address Selection Bench Operation

Electrostatic Discharge Information ..................

Static-Safe Accessories

Routine Maintenance

Cleaning the Display Cleaning the RF Section’s Fan Filter

Replacing the RF Section’s Battery

Ordering Information

Direct Mail-Order System Direct Phone-Order System

Returning the Instrument for Service ................

ServiceTags

Original Packaging Other Packaging

Sales and Service Offices ............................

............................................

...............................

..............................

...............

SerialNumbers

..................................

...........................

..................................

............................

...............................

..............................

...............

................

...............................

.........................

.......................

......................................

................................

..................................

l-2 l-2 1-2 l-5 1-6 1-7 l-7 1-9 l-9

1-9 l-10 l-11 1-12 1-12 1-13 l-13 1- 18 1- 18 l-18 1-19 1-19 1-19 l-2 1 1-22

General Information

1-l

Introducing the HP 8568B

The HP 8568B spectrum analyzer is capable of measuring signals from

-135 dBm to MHz. The HP 8568B is a complete, self-contained instrument that requires only an external ac power source for operation. A set of ac power cables, suitable for use in the country to which the instrument is originally shipped, are included with the instrument.

+30

dBm over a frequency range of 100 Hz to 1500

Safety

Accessories Supplied

Before installing or operating this instrument, you should familiarize yourself with the safety marking on the instrument and the safety instructions in the manuals. The instrument has been manufactured and tested in accordance with international safety standards. However, to ensure safe operation of the instrument and personal safety of the user, the cautions and warnings in the manuals must be followed. Refer to the summary of the safety information located near the front of this manual.

Figure l-l illustrates the instrument with the supplied accessories. In accordance with international safety standards, both sections of this instrument are equipped with three-wire ac power cables. Various power cables are available to connect the HP 8568B to the types of AC power outlets unique to specific geographic areas. See Figure l-2. Cables appropriate for the area to which the instrument is originally shipped are included with the instrument.

1-2 General information

IF-Display

Sect ion

RF Section

IF-Display

Sect ion

RF Sect ion

FRONT VIEW

REAR VIEW

Figure l-l. HP 8568B with Accessories Supplied

Description

HP Part Number

Type N (m) to BNC (f) connector 1250-0780

1ST

LO OUT BNC termination

BNC jumper cable (quantity: 2)

HP 11593A

85660-60117 Bus interconnect cable (W31) 85662-60220 Coax interconnect cable Line power cables (2 each)

(W30) 85662-60093

see Figure l-2

General Information 1-3

PLUG TYPE * *

Hy;A;T

NUMBER

PLUG

DESCRIPTION

CABLE LENGTH

a.4

(INCHES)

CABLE COLOR

FOR USE

IN COUNTRY

250V

125V

250V

8120-1351 8120-1703

8120-1369 8 120-0696

8120-1689 8120-1692

8120-1348 8120-1538

8120-1378

8120-4753

8120-1521

8 120-4754

8120-5182 8120-5181

Straight*

90’

Straight*

9o”

Straight

90’

Straight*

90’

Straight* Straight

90*

90’

Straight*

90°

BS1363A

NZSS198/ASC112 201

CEE7-Yl

NEMA5-15P

NEMA5-

NEMA5-15P

15P

229 (90) Mint Gray

Mint

229 (90)

(79)

221 (87)

201 (79)

203 (80) 203 (80)

203 (80) 230 (90)

200 (78) 200 (78)

Mint Gray

Mint

Gray

B I ock Black

Jade

Gray Jade Gray Jade Gray Jade Gray

Jade Groy Jade Gray

Great Cyprus.

Singapore,

Z imbobwe

Argentina,

Austrollo,

New Zealand,

Mainland Chino

East and West

Europe, African Republic United Arab

Republ

(unpolarized in

many

United States Canada, Japan (100 V or

200 V), Brazil,

Colombia, Mexico

Philippines,

Soudio Taiwan

nations)

Arabia,

Israel

Britoln,

Niger

centrcl

ia,

Port number for plug is industry

HP Part Number for complete cable, including plug

E =

FORMAT80

Earth

1-4 General Information

Ground,

identifier for plug only. Number shown for cable is

L = Line; N = Neutral.

Figure l-2. AC Power Cables Available

Accessories Available

A number of accessories are available from Hewlett-Packard to help you configure your HP 8568B for your specific needs.

Preamplifiers

Close-Field Probes

75 to 50 ohm Minimum-Loss Pad

Microwave Limiters

The HP 8447D preamplifier provides a minimum of 26 dB gain from 100 kHz to

1.3

GHz

to enhance measurements of very

low-level signals. The HP 11940A and HP 11941A Close-Field

Probes are small, hand-held, field sensors. The probes can be used to make repeatable, absolute, magnetic-field measurements. When attached to a signal source, the probes can be used to generate a localized magnetic field for electromagnetic interference HP 11941A is specified over a frequency range of 9 kHz to 30 MHz. The HP 11940A operates from 30 MHz to 1

The minimum-loss pad (dc - 2.0 number 08566-60122, is a low-VSWR resistive matching device for making measurements in

75-ohm systems.

The HP 11867A Limiter protects the instrument input circuits from damage due to high power levels. It operates over a frequency range of dc to 1.8

10 W continuous and 100 W peak power.

(EMI)

susceptibility testing. The

GHz.

electromagnetic-

GHz),

HP part

GHz

and is rated

The HP 11693A Limiter is similar to the HP 11863A but has a frequency range of 0.4 to 12.4

75 W peak power. HP-IB Cable Controllers

HP 85650A Quasi-Peak The HP 85650A adds to the spectrum Adapter

Use HP

The HP 8568B is fully HP-IB programmable.

The preferred controllers are HP 9000

Series 300 computers. Consult your local

Hewlett-Packard service representative for

other recommended controllers and available

software.

analyzer the resolution bandwidth filters and

quasi-peak detection capability specified by

CISPR. Together the quasi-peak adapter and

the spectrum analyzer provide many of the

elements needed for an EM1 receiver system.

GHz

and is rated 1 W continuous and

10833A/B/G/D

HP-IB cables.

General Information

l-5

85685A

Preselector

The HP with an HP test receiver. It improves spectrum analyzer measurement sensitivity while providing

overload protection from out-of-band signals. This enables low-level signals to be monitored in the presence of high-level ambients. Its frequency range is 20 Hz to 2

85685A

8568B

RF Preselector can be used

to form a multi-purpose RF

GHz.

Options

Troubleshooting and Service information for the HP

Repair Manual available in the HP 85680B Troubleshooting

and

&pair

Troubleshooting and

They include schematic diagrams, block

diagrams, component location illustrations, circuit descriptions, repair procedures, and troubleshooting information.

Service Kits

Several options are available and can be ordered by option number when you order the instrument. Some of the options are also available as kits that can be ordered and installed after you have received your HP 8568B.

Option 001

Option 010

75 ohm (BNC) RF input. Rack Mount Slide kit. This option supplies the

necessary hardware and installation instructions for mounting an instrument on slides into a rack of 482.6 mm (19 inch) spacing. The heavy-duty slides are designed specifically to support the weight of the HP approximately 50 kg (112 lbs), the use of this option is recommended. Option 010 is also available as a kit (HP part number 5062-6407).

A service kit is available containing troubleshooting and alignment accessories

for the HP 8568B. The kit includes a test

cable and extender boards. Order the kit as HP part number 08568-60001. A combined kit, HP part number 08566-60005 is available containing accessories for both the HP 8566B and HP 8568B instruments.

8568B.

Because of the weight of the HP

Manual

and the

&pair

8568B

HP 85662A

Manual.

8568B,

1-6 General Information

Option 080 Option 081 Option 400

Option 462

Information Cards in Japanese. Information Cards in French. The standard HP 8568B requires that the power line

frequency be 50 or 60 Hz. Option 400 allows the instrument to operate with a 400 Hz power line frequency.

This option provides 6 dB bandwidths for making MIL-STD EM1 measurements. In addition to enhancing instrument capability for MIL-STD 461D and 462D EM1 measurements, Option 462 spectrum analyzers can still make all commercial

EM1 and general-purpose measurements. Option 462 instruments with HP 85662A (top box) serial prefixes below 3341A were

462A/B/C

(impulse bandwidth).

compatable

with MIL-STD

Option 857

Option 908

Option 910

Option 913

Option 915

The HP

applications. This option provides the cumulative log fidelity and absolute amplitude performance necessary for EMC receivers to meet their system

specs. Rack Mount Flange kit (to mount without handles).

This option supplies the necessary hardware and installation instructions for mounting an instrument in a rack of 482.6 mm (19 inch) spacing. Option 908 is also available as a kit (HP part number 5062-3986).

Extra

Manual and an extra HP 8568B and Adjustments Manual.

Rack Mount Flanges with Handles (handles provided). This option supplies the necessary hardware and installation instructions for mounting an instrument with handles in a rack of 482.6 mm (19 inch) spacing. Option 913 is also available as a kit (HP part number 5062-3986).

This option supplies the HP 8568B troubleshooting and repair manuals.

8568B

Option 857 is used in EMC receiver

HP 8568B Operating and Programming

&formunce lksts

Instruments Covered

by This Manual

This manual contains information for setup and verification of operation of HP 8568B spectrum analyzers, including those with Option 001 (75 Ohm RF INPUT), Option 400 (400 Hz operation), Option 462 (6 dB bandwidths or impulse bandwidths), or Option 857 installed. The procedures in this manual can also be used to setup and verify the operation of HP 8568A spectrum analyzers that have been converted into HP 8568B spectrum analyzers through the installation of an HP 8568AB Retrofit kit (formerly the HP 8568A+OlK Retrofit Kit).

Serial

Hewlett-Packard makes frequent improvements to its products to enhance their performance, usability, or reliability. HP service personnel have access to complete records of design changes to each type of equipment, based on the equipment’s serial number.

Whenever you contact HP about your instrument, have the complete serial number available to ensure obtaining the most complete and accurate information possible.

A serial number label is attached to the rear of each instrument section. The serial number has two parts: the prefix (the first four numbers and a letter), and the suffix (the last five numbers). See Figure 1-3.

Numbers

The first four numbers of the prefix are a code identifying the date of the last major design change incorporated in your instrument.

General Information

l-7

The letter identifies the country in which the instrument was

manufactured. The five-digit suffix is a sequential number and is different for each instrument. Whenever you list the serial number or refer to it in obtaining information about your instrument section,

be sure to use the complete number, including the full prefix and the

suffix.

PREFIX COUNTRY OF ORIGIN

SUFFIX

2730A00427

Figure 1-3. Typical Serial Number Label

l-8

General Information

Calibration Cycle

To ensure that the HP 8568B meets the specifications listed in Chapter

3, the operation verification listed in Chapter 5 should be performed every 6 months.

HP-IB Address

Selection

Bench Operation

The instrument is shipped with the HP-IB address preset to 18 (ASCII 2R). The instrument stores this address in internal RAM memory which is maintained by a lithium battery in STANDBY and when line power is removed. This stored address can be changed from the front panel or on switches located on the RF section’s Al5 controller assembly. Refer to Chapter 2, “Installation.”

The instrument has plastic feet and convenience in bench operation. The plastic feet are shaped to make full-width modular instruments self-aligning when stacked. The instrument is shipped with front handles attached for ease of moving.

foldaway

tilt stands for

General Information

l-9

Electrostatic Discharge Information

Electrostatic discharge (ESD) can damage or destroy electronic components. Therefore, observe the following precautions:

n Be sure that all instruments are properly earth-grounded to prevent

buildup of static charge.

n Before connecting any coaxial cable to an instrument connector for

the first time each day, momentarily short the center and outer conductors of the cable together.

n Personnel should be grounded with a resistor-isolated wrist strap

before touching the center pin of any connector and before removing any assembly from the instrument.

n When replacing the instrument’s battery (refer to Replacing the RF

Section Battery in this chapter), be sure to observe the following:

q Perform the work at a static-safe workstation. See Figure l-4. q Store or transport PC boards only in static-shielding containers. q Always handle board assemblies by the edges. Do not touch the

edge-connector contacts or trace surfaces with bare hands.

Figure l-4 shows an example of a static-safe workstation. Two types of ESD protection are shown: a) conductive table mat and wrist strap combination, and b) conductive floor mat and heel strap combination. The two types must be used together to ensure adequate ESD protection. Refer to

nble

l-l for a list of static-safe accessories and

their part numbers.

FORMAT46

Wrist Str

Building

Ground

Bui

Id;nn

” “Y

l-10 General Information

Figure l-4. Static-Safe Workstation

Static-Safe

Accessories

able

l-l. Static-Safe Accessories

HP Fart Number

Order the following through any Hewlett-Packard Sales and Service Office

9300-0797

9300-0980 9300-1383

9300-1169

Set includes: 3M static control mat 0.6 m x 1.2 m (2 ft

x 4 ft) and 4.6 cm (15 ft) ground wire. (The wrist-strap and wrist-strap cord are not included. They must be ordered separately.)

Wrist-strap cord 1.5 m (5 ft) Wrist-strap, color black, stainless steel, without cord,

has four adjustable links and a 7 mm post-type connection.

ESD heel-strap (reusable 6 to 12 months).

Description

General Information l-l 1

Routine Maintenance

Cleaning the Display

Caution

The inside surface of the glass CRT shield is coated with a thin metallic film that can be easily damaged. To clean the glass CRT shield, use thin-film cleaner (HP part number 8500-2163) and a lint-free cloth. To clean the inside surface of the display glass, remove the glass CRT shield using the following procedure:

1. Disconnect the ac line power from the instrument sections.

2. Remove the two screws securing the display bezel and CRT glass shield to the front panel. These screws are located on the bottom edge of the bezel. See Figure l-5.

While removing the two bezel screws, use caution to prevent the glass from falling.

3. Remove the bezel and CRT glass shield.

1-12 General Information

Bezel Screws

Figure l-5. Display Bezel Screws

4. Clean the glass using the thin-film cleaner and a lint-free cloth.

5. Replace the glass shield. Place the side of the glass that has the silver edge towards the CRT.

6. Replace the bezel and two screws.

Cleaning the RF

Section’s Fan Filter

The fan on the RF section has a air filter that should be regularly inspected and cleaned. To clean the air filter perform the following:

1. Disconnect the ac line power from the RF section.

2. Remove the four screws securing the filter cover to the fan on the RF section. Remove the filter.

3. Clean the filter using a mild soap and water. Dry the filter thoroughly. If damaged, replace with a new filter (HP part number 85660-00049).

4. Replace the filter and its cover.

Replacing the RF

Section’s Battery

Warning

Caution

The RF section’s Al5 controller assembly has a battery for

maintaining internal RAM memory. This memory is primarily used for storing instrument states, error correction data, and

DLPs

(downloadable programs). Under normal conditions, the

battery should typically last a minimum of three years. Use the following procedure to replace the battery. Refer to the HP

Troubleshooting and Repair Manual for the HP part number.

Battery or attempt to recharge this battery. Dispose of discharged battery in a safe manner.

Changing the battery requires the removal of the RF section’s protective bottom cover. This should be performed only by a qualified service person. Refer all such servicing of the instrument to qualified service persons.

ESD (Electrostatic Discharge) can damage or destroy electronic components. Work at a static-safe workstation when replacing the battery.

1. Place the HP

BTl

contains lithium iodide. Do not incinerate, puncture,

BTl

on the Al5 controller assembly

8568B

on a static-safe workstation. Refer to

“Electrostatic Discharge Information” in this chapter.

8568OB

2. Disconnect the ac line power from the instrument sections. Place the HP 8568B upside down on the work surface so that the bottom of the RF section is facing up.

General Information

l-13

3. Using a screw driver, remove the two bottom RF section rear panel bumpers. See

callouts

1 in Figure l-6.

TOP DOWN

Figure 1-6. Removing the Bottom Cover

4. Back out screw 2 (Figure l-6) causing the cover to unseat from the front frame. When the cover is clear of the front frame, lift the cover up to remove it.

l-14 General Information

5. Remove the cover from the Al5 controller assembly. See Figure l-7.

Al5 CONTROLLER

ASSEMBLY

Figure l-7. Location of Al5 Controller Assembly

General Information 1-15

6. Remove the Al5 controller assembly. Locate the battery on the Al5 assembly. Figure l-8 shows the location of the battery.

Battery

(A15BTl)

Figure 1-8. Location of Battery on Al5 Controller Assembly

7. Replace the battery with a new one (HP part number 1420-0331). Be sure to install the battery with the polarity shown in Figure l-8.

8. Replace the Al5 controller assembly.

9. Reconnect the power cables to the IF and RF sections.

10. Connect a jumper wire between the Al5 controller test points

A15TPl-8 T3 and A15TPl-9 ST (to erase and initialize Al5

controller nonvolitile memory).

11. Set the LINE switch to ON. The Al5 controller LED’s A15DSl

through indicating the Al5 controller has

A15DS14

should all turn on, then turn off, sequentially,

sucessfully

executed self-test. If they do not, the Al5 controller might be damaged or improperly installed. In addition, all front panel LED’s should turn on momentarily, indicating the HP 8566B has performed its power-on pretest.

In addition to normal HP 8568B power-up HP-IB address and firmware revision information, a BATTERY flag should appear on the CRT, indicating that information previously stored in the Al5 controller nonvolitile memory has been lost or erased. Normally the BATTERY flag appears after several years of use to indicate that the lithium battery A15BTl needs to be replaced.

12. Remove the jumper wire between A15TPl-8 T3 and A15TPl-9 ST.

1-16 General Information

13. Set the LINE switch to STANDBY and then to ON. The HP 8568B should power up normally, without any flags displayed on the CRT.

14. Set the LINE switch to STANDBY and remove the power cable from the rear of the RF section.

15. Install the controller cover,

16. Replace the RF section bottom cover and the two rear feet.

17. Place the HP 8568B top side up and reconnect the power cable to

the RF section.

18. Set the LINE switch to ON and allow a 2-hour warm-up.

19. Recalibrate the instrument with the following steps. (For a more

complete description of the calibration, refer to the HP

Operating

and Programming Manual.)

8568B

a. Connect the front-panel CAL OUTPUT signal to the SIGNAL

INPUT 2.

b. Press

[RECALL)

8, and then adjust the front-panel AMPTD CAL

adjust for a marker amplitude of -10.00 dBm.

c. Press

cm]

9, and then adjust the front-panel FREQ ZERO

adjust for maximum signal amplitude.

d. Press

@iiF]

[FREQUENCY SPAN]

to load the error correction

data in the instrument’s memory.

General Information l-17

+ 88 hidden pages