Service Guide
Agilent 86100A/B
Mainframe
© Copyright 2000-2002
Agilent Technologies
All Rights Reserved. Reproduction, adaptation, or translation
without prior written permiss io n
is prohibited, except as allowed
under copyright laws.
Agilent Part No. 86100-90047
Printed in USA
February 2002
Agilent Technologies
Lightwave Division
3910 Brickway Boulevard
Santa Rosa, CA 95403, USA
Notice.
The information contained in
this document is subject to
change without no t ic e. Companies, names, and data used in
examples herein are fictitious
unless otherwise noted. Ag il ent
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 n o t be liable
for errors contained herein or for
incident al or consequential damages in connection with the furnishing, performance, or use of
this material.
Restricted Righ ts Le gen d.
Use, duplication, or discl osure
by the U.S. Government is subject to restr ictions as set fo rth in
subparagraph (c) (1) (ii) of the
Rights in Technical Data and
Computer Software clause at
DFARS 252.227-7013 for DOD
agencies, and subparagraphs (c)
(1) and (c) (2) of the Commercial Computer Soft wa re
Restricted Rights clause at FAR
52.227-19 for other agencies.
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, A gil ent
Technologies will, at its option,
either repair or replace pro duc ts
which prove to be defective. For
warranty service or repair, this
product must be returned to a
service facility designated by
Agilent Technologi es. Buyer
shall prepay shipping charges to
Agilent Technologi es and Agilent Technolo gies shall pay s hipping charges to return the
product to Buyer. However,
Buyer shall pay all shipping
charges, duties, and taxes for
products returned to Agilent
Technologies from another
country.
Agilent Technolo g ies warrant s
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.
Limitati on 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 outs ide of the environmental specif ications for the
product, or improper site pr eparation or maintenance.
No other warranty is expressed
or implied. Agilent Technologies
specifically disclaims the
implied warranties of merchantability and fitness for a particular purpose.
Exclusive Remedies.
The remedies provided her ei n
are buyer' s s ole and exclusive
remedies. Agilent Technologies
shall not be li ab le for any direc t,
indirect, special, incid ental, or
consequential damages, whether
based on contract, tort, or any
other legal theory.
Safety Symbols.
CAUTION
Caution denotes a hazard. It
calls attention to a proc ed ure
that, if not co r rectly perfor med
or adhered to, could result in
damage to or destruction of the
product. Do not proceed beyond
a caution note until the indicated
conditions are fully understood
and met.
WARNING
Warning denotes a hazard. It
calls attention to a proc ed ure
which, if not correctly per formed or adhered to, cou ld
result in injury or loss of life. Do
not proceed beyond a warning
sign until the indicated conditions are fully understood and
met.
The instruction documentation symbol. The
product is marked with
this warning symbol
when it is necess ar y for
the user to refer to the
instruction in the documentation.
The AC symbol is used
to indicate the required
nature of the line module input power.
| The ON symbols are
used to mark the positions of the instrument
power line switch.
The Standby symbol is
used to mark the position of the instrument
power line switch.
The OFF symbols
are used to mark the
positions of the instrument power line switch.
The CE mark is a registered trademark of the
European Community.
The CSA mark is a registered tra d emark of the
Canadian Standards
Association.
ISM1-A This is a symbol of an
Industrial Scientific and Medical
Group 1 Class A product..
Typographical Conventions.
The following conv en tions are
used in this book:
key type for keys or text located
on the keyboard or instrument.
softkey type for key names that
are displayed on the instrument’s
screen.
display type for words or
characters displayed on the computer’s screen or instrument’s
display.
user type for words or characters
that you type or enter.
emphasis type for words or char-
acters that emphas ize some point
or that are used as place holders
for text that you type.
ii
Servicing—At a Glance
Servicing—At a Glance
This manual documents the service and repair of the Agilent 86100A/B to the
assembly level. Before servicing the mainframe, you should be aware that amplitude
calibration data can only be installed by the factory.
Servicing requires
special tools
The tools listed below are required to repair all versions of the Agilent 86100A/B.
• T-6 screwdriver p/n 8710-1618
• T-8 screwdriver p/n 8710-1614
• T-10 screwdriver p/n 8710-1623
• T-25 screwdriver p/n 8710-1617
• T-15 screwdriver p/n 8710-1622
• wire cutter p/n 8710-0012
• small pozidrive screwdriver p/n 8710-0899
• long-nose pliers p/n 8710-1107
• Flexure Lock p/n 5022-0115
• 4-mm allen driver
• 5/64 allen driver
iii
General Safety Considerations
General Safety Considerations
This product has been designed and tested in accordance with I EC Publication 1010,
Safety Requirements for Electronic Measuring Apparatus, 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
product in a safe condition.
WARNIN G 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.
WARNIN G No operator serviceable parts inside. Refer servicing to qualified personnel. To
prevent electrical shock, do not remove covers.
iv
Contents
Servicing—At a Glance iii
1 General Information
General Reference 1-3
Cleaning Optical Connectors 1-4
Electrostatic Discharge Information 1-9
Returning the Instrument for Service 1-11
Agilent Technologies Service Offices 1-13
Specifications 1-14
Recommended Test Equipment 1-15
Preventative Maintenance 1-17
2 Performance Verification
Performance Verification 2-2
Time Interval Accuracy Performance Test 2-3
Front Panel Cal Signal 2-11
Jitter Performance Test 2-13
Trigger Verification (Standard and Option 001) 2 -18
Performance T es t Record 2-24
3 Adjustments
86100A/B Mainframe Timebase Adjustment 3-3
4 Assembly Replacement
To Remove the Mainframe Cover 4-4
To Rem ove the Mainframe Front Panel 4-7
LS-120 Disc Drive Modification (86100A Only) 4-12
To Remove the A2 Flat Panel Display 4-14
To Remove the Display Backlights 4-15
To Remove the A8 Touch Screen 4-17
To Remove the A7 Front Panel Keyboard 4-18
To Rem ove the A3 Backlight Inverter 4-20
To Remove the Front Panel Trigger Input 4-23
To Remove the A4 PC Motherboard 4-25
To Remove the A13 Acquisition (Option 001) 4 -32
A13 Acquisition Board PLD Header Modification
(86100A Only) 4-36
To Remove the A1 Power Supply 4-37
To Remove the A6 Distribution Assembly 4-39
5 Replaceable Parts—86100A
Major Assembly and Cable Identification 5-3
Front View Identification 5-6
Front Inside Panel Identifi cati on 5-8
Front View, Front Pa n e l Removed, I de ntification 5-10
Rear View Identification 5-12
Left and Right Side Identification 5-14
Left Side, Cover Removed, Identification 5-16
Right Side, Cover Removed, Identification 5-18
Contents-1
Bottom View Identification 5-20
Bottom View, Cov er Re moved, Identification 5-22
To p View, Cover Removed, Identification 5-24
Rear Panel Identification 5-26
Block Diagrams 5-27
6 Replaceable Parts—86100B
Major Assembly and Cable Identification 6-3
Front View Identification 6-6
Front Inside Panel Identifi cati on 6-8
Front View, Front Panel Remov e d, Iden tification 6-10
Rear View Identification 6-12
Left and Right Side Identification 6-14
Left Side, Cover Removed, Identification 6-16
Right Side, Cover Removed, Identification 6-18
Bottom View Identification 6-20
Bottom View, Cov er Re moved, Identification 6-22
To p View, Cover Removed, Identification 6-24
Rear Panel Identification 6-26
Block Diagrams 6-27
Contents-2
1
General Reference 1-3
Cleaning Optical Connectors 1-4
Electrostatic Discharge Information 1-9
Returning the Instrument for Service 1-11
Agilent Technologies Service Offices 1-13
Specifications 1-14
Recommended Test Equipment 1-15
Preventative Maintenance 1-17
General Information
General Information
General Information
General Information
In this chapter, you will find general information on caring for your optical devices.
Safety first!
Before servicing the mainframe, familiarize yourself with the safety markings on the instrument
and the safety instructions in this manual. This instrument has been manufactured and tested
according to international safety standards. To ensure safe operation of the instrument and the
personal safety of the user and service personnel, the cautions and warnings in this manual must
be heeded. Refer to the summary of safety considerations at the front of this manual.
WA RN IN G These 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.
WA R NI NG The opening of covers or removal of parts is likely to expose dangerous voltages. Disconnect
the instrument from all voltage sources while it is opened.
WA RN IN G The power cord is connected to internal capacitors that may remain live for five seconds
after disconnecting the plug from its power supply.
WA R N I N G The detachable power cord is the instrument disconnecting device. It disconnects the mains
circuits from the mains supply before other parts of the instrument. The front panel switch
is only a standby switch and is not a LINE switch (disconnecting device).
WA RN IN G This is a Safety Class 1 Product (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 product is likely to make the product dangerous. Intentional interruption is prohibited.
NOTE The warranty is null and void on instruments that have had the seals broken by the
customer. The instrument should only be disassembled by Agilent Technologies Customer
Engineers.
WA RN IN G Use of controls or adjustment or performance of procedures other than those specified
herein may result in hazardous radiation exposure.
1-2
General Information
General Reference
General Reference
Whenever you contact Agilent Technologies about your mainframe, have the complete serial
number and option designation available. This will ensure you obtain accurate service information.
• Refer to Table 1-1 for a list of internal labels.
Clean the cabinet using a damp cloth only.
Protect against ESD damage
Electrostatic discharge (ESD) can damage or destroy electronic components. All work on electronic assemblies should be performed at a static-safe work station. Refer to “Electrostatic Dis-
charge Information” on page 1-9 for more information on preventing ESD.
Table 1-1. Internal Labels
This label warns you about hazardous voltages
present on the power supply. Use extreme caution.
1-3
General Information
Cleaning Optical Connectors
Cleaning Optical Connectors
Accurate and repeatable measurements require clean connections. Use the following guidelines
to achieve the best possible performance when making measurements on a fiber-optic system:
• Keep connectors covered when not in use.
• Use dry connections whenever possible.
• Use the cleaning methods described in this section.
• Use care in handling all fiber-optic connectors.
• When inserting a fiber-optic connector into a front-panel adapter, make sure that the fiber end
does not touch the outside of the mating connector or adapter.
Because of the small size of cores used in optical fibers, care must be used to ensure good connections. Poor connections result from core misalignment, air gaps, damaged fiber ends, contamination, and improper use and removal of index-matching compounds.
Use dry connections. Dry connectors are easier to clean and to keep clean. Dry connections can
be used with physically contacting connectors (for example, Diamond HMS-10/HP, FC/PC,
DIN, and ST). If a dry connection has 40 dB return loss or better, making a wet connection will
probably not improve, and can actually degrade, performance.
CAUTION Agilent Technologies strongly recommends that index matching compounds not be applied to
their instruments and accessories. Some compounds, such as gels, may be difficult to remove and
can contain damaging particulates. If you think the use of such compounds is necessary, refer to
the compound manufacturer for information on application and cleaning procedures.
1-4
Table 1-2. Cleaning Accessories
Item Agilent Part Number
Pure isopropyl alcohol —
Cotton swabs 8520-0023
Small foam swabs 9300-1223
Compressed dust remover (non-residue) 8500-5262
Table 1-3. Dust Caps Provided with Lightwave Instruments
Item Agilent Part Number
Laser shutter cap 08145-64521
FC/PC dust cap 08154-44102
Biconic dust cap 08154-44105
General Information
Cleaning Optical Connectors
DIN dust cap 5040-9364
HMS10/HP dust cap 5040-9361
ST dust cap 5040-9366
Inspecting Fiber-Optic Cables
Consistent measurements with your lightwave equipment are a good indication that you have
good connections. However, you may wish to know the insertion loss and/or return loss of your
lightwave cables or accessories. If you test your cables and accessories for insertion loss and
return loss upon receipt, and retain the measured data for comparison, you will be able to tell in
the future if any degradation has occurred.
Connector (or insertion) loss is one important performance characteristic of a lightwave connector. Typical values are less than 0.5 dB of loss, and sometimes as little as 0.1 dB of loss with high
performance connectors. Return loss is another important factor. It is a measure of reflection: the
less reflection the better (the larger the return loss, the smaller the reflection). The best physically
contacting connectors have return losses better than 50 dB, although 30 to 40 dB is more common.
Visual inspection of fiber ends
Although it is not necessary, visual inspection of fiber ends can be helpful. Contamination or imperfections on the cable end face can be detected as well as
cracks or chips in the fiber itself. Use a microscope (100X to 200X magnification) to inspect the entire end face for contamination, raised metal, or dents in
the metal as well as any other imperfections. Inspect the fiber for cracks and
chips. Visible imperfections not touching the fiber core may not affect performance (unless the imperfections keep the fibers from contacting).
1-5
General Information
Cleaning Optical Connectors
To clean a non-lensed connector
CAUTION Do not use any type of foam swab to clean optical fiber ends. Foam swabs can leave filmy deposits
on fiber ends that can degrade performance.
1 Apply isopropyl alcohol to a clean, lint-free cotton swab or lens paper.
Cotton swabs can be used as long as no cotton fibers remain on the fiber end after cleaning.
2 Before cleaning the fiber end, clean the ferrules and other parts of the connector.
3 Apply isopropyl alcohol to a new, clean, lint-free cotton swab or lens paper.
4 Clean the fiber end with the swab or lens paper. Move the swab or lens paper back and forth across
the fiber end several times.
Wiping or mild scrubbing of the fiber end can help remove particles when application of alcohol
alone will not remove them. This technique can remove or displace particles smaller than one micron.
5 Immediately dry the fiber end with a clean, dry, lint-free cotton swab or lens paper.
6 Blow across the connector end face from a distance of 6 to 8 inches using filtered, dry, compressed
air. Aim the compressed air at a shallow angle to the fiber end face.
Nitrogen gas or compressed dust remover can also be used.
CAUTION Do not shake, tip, or invert compressed air canisters, because this releases particles in the can into
the air. Refer to instructions provided on the compressed air canister.
7 As soon as the connector is dry, connect or cover it for later use.
1-6
General Information
Cleaning Optical Connectors
To clean an adapter
1 Apply isopropyl alcohol to a clean foam swab.
Cotton swabs can be used as long as no cotton fibers remain after cleaning. The foam swabs listed
in this section’s introduction are small enough to fit into adapters.
Although foam swabs can leave filmy deposits, these deposits are very thin, and the risk of other
contamination buildup on the inside of adapters greatly outweighs the risk of contamination by
foam swabs.
2 Clean the adapter with the foam swab.
3 Dry the inside of the adapter with a clean, dry, foam swab.
4 Blow through the adapter using filtered, dry, compressed air.
Nitrogen gas or compressed dust remover can also be used. Do not shake, tip, or invert compressed air canisters, because this releases particles in the can into the air. Refer to instructions
provided on the compressed air canister.
1-7
General Information
Cleaning Optical Connectors
Cleaning Electrical Connections
The following list includes the basic principles of microwave connector care.
Handling and Storage
• Keep connectors clean
• Extend sleeve or connector nut
• Use plastic endcaps during storage
•Do not touch mating plane surfaces
•Do not set connectors contact-end down
Visual Inspection
• Inspect all connectors carefully before every connection
• Look for metal particles, scratches, and dents
•Do not use damaged connectors
Cleaning
• Try cleaning with compressed air first
• Clean the connector threads
•Do not use abrasives
•Do not get liquid onto the plastic support beads
Making Connections
• Align connectors carefully
• Make preliminary connection lightly
• To tighten, turn connector nut only
•Do not apply bending force to connection
•Do not overtighten preliminary connection
•Do not twist or screw in connectors
•Do not tighten past the “break” point of the torque wrench
1-8
General Information
Electrostatic Discharge Information
Electrostatic Discharge Information
Electrostatic discharge (ESD) can damage or destroy electronic components. All work on electronic assemblies should be performed at a static-safe work station. The following figure shows
an example of a static-safe work station using two types of ESD protection:
• Conductive table-mat and wrist-strap combination.
• Conductive floor-mat and heel-strap combination.
Both types, when used together, provide a significant level of ESD protection. Of the two, only
the table-mat and wrist-strap combination provides adequate ESD protection when used alone.
To ensure user safety, the static-safe accessories must provide at least 1 MΩ of isolation from
ground. Refer to Table 1-4 for information on ordering static-safe accessories.
1-9
General Information
Electrostatic Discharge Information
WA RN IN G These techniques for a static-safe work station should not be used when working on
circuitry with a voltage potential greater than 500 volts.
Table 1-4. Static-Safe Accessories
HP Part
Number
9300-0797
9300-0980 Wrist-strap cord 1.5 m (5 ft).
9300-1383 Wrist-strap, color black, stainless steel, without cord, has four
9300-1169 ESD heel-strap (reusable 6 to 12 months).
Description
3M static control mat 0.6 m
ground wire. (The wrist-strap and wrist-strap cord are not included.
They must be ordered separately.)
adjustable links and a 7 mm post-type connection.
× 1.2 m (2 ft × 4 ft) and 4.6 cm (15 ft)
1-10
General Information
Returning the Instrument for Service
Returning the Instrument for Service
The instructions in this section show you how to properly return the instrument for repair or calibration. Always call the Agilent Instrument Support Center first to initiate service before returning your instrument to a service office. This ensures that the repair (or calibration) can be
properly tracked and that your instrument will be returned to you as quickly as possible. Call this
number regardless of where you are located. Refer to “Agilent Technologies Service Offices” on
page 1-13 for a list of service offices.
Agilent Instrument Support Center . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (800) 403-0801
If the instrument is still under warranty or is covered by an Agilent maintenance contract, it will
be repaired under the terms of the warranty or contract (the warranty is at the front of this manual). If the instrument is no longer under warranty or is not covered by an Agilent maintenance
plan, Agilent Technologies will notify you of the cost of the repair after examining the unit.
When an instrument is returned to an Agilent Technologies service office for servicing, it must
be adequately packaged and have a complete description of the failure symptoms attached. When
describing the failure, please be as specific as possible about the nature of the problem. Include
copies of additional failure information (such as the instrument failure settings, data related to
instrument failure, and error messages) along with the original calibration data disks and the
instrument being returned.
Preparing the instrument for shipping
1 Write a complete description of the failure and attach it to the instrument. Include any specific
performance details related to the problem. The following information should be included with
the instrument being returned for service:
• Type of service required.
• Date instrument was returned for repair.
• Description of the problem:
• Whether problem is constant or intermittent.
• Whether instrument is temperature-sensitive.
• Whether instrument is vibration-sensitive.
• Instrument settings required to reproduce the problem.
• Performance data.
• Company name and return address.
• Name and phone number of technical contact person.
• Model number of returned instrument.
• Full serial number of returned instrument.
• List of any accessories returned with instrument.
2 Cover all front or rear-panel connectors that were originally covered when you first received the
instrument.
1-11
General Information
Returning the Instrument for Service
CAUTION Cover electrical connectors to protect sensitive components from electrostatic damage. Cover
optical connectors to protect them from damage due to physical contact or dust.
CAUTION Instrument damage can result from using packaging materials other than the original materials.
Never use styrene pellets as packaging material. They do not adequately cushion the instrument
or prevent it from shifting in the carton. They may also cause instrument damage by generating
static electricity.
3 Pack the instrument in the original shipping containers. Original materials are available through
any Agilent Technologies office. Or, use the following guidelines:
• Wrap the instrument in antistatic plastic to reduce the possibility of damage caused by electro-
static discharge.
• For instruments weighing less than 54 kg (120 lb), use a double-walled, corrugated cardboard
carton of 159 kg (350 lb) test strength.
• The carton must be large enough to allow approximately 7 cm (3 inches) on all sides of the
instrument for packing material, and strong enough to accommodate the weight of the instrument.
• Surround the equipment with approximately 7 cm (3 inches) of packing material, to protect the
instrument and prevent it from moving in the carton. If packing foam is not available, the best
alternative is S.D-240 Air Cap™ from Sealed Air Corporation (Commerce, California 90001).
Air Cap looks like a plastic sheet filled with air bubbles. Use the pink (antistatic) Air Cap™ to
reduce static electricity. Wrapping the instrument several times in this material will protect the
instrument and prevent it from moving in the carton.
4 Seal the carton with strong nylon adhesive tape.
5 Mark the carton “FRAGILE, HANDLE WITH CARE”.
6 Retain copies of all shipping papers.
1-12
Agilent Technologies Service Offices
Before returning an instrument for service, call the Agilent Technologies Instrument Support
Center at (800) 403-0801, visit the Test and Measurement Web Sites by Country page at
http://www.tm.agilent.com/tmo/country/English/index.html, or call one of the numbers listed
below.
Agilent Technologies Service Offices
Austria 01/25125-7171
Belgium 32-2-778.37.71
Brazil (11) 7297-8600
China 86 10 6261 3819
Denmark 45 99 12 88
Finland 358-10-855-2360
France 01.69.82.66.66
General Information
Agilent Technologies Service Offices
Germany 0180/524-6330
India 080-34 35788
Italy +39 02 9212 2701
Ireland 01 615 8222
Japan (81)-426-56-7832
Korea 82/2-3770-0400
Mexico (5) 258-4826
Netherlands 020-547 6463
Norway +47 22 73 57 59
Russia +7-095-797-3930
Spain (34/91) 631 1213
Sweden 08-5064 8700
Switzerland (01) 735 7200
Taiwan (886 2) 2-712-0404
United Kingdom 01 344 366666
United States and Canada (800) 403-0801
1-13
General Information
Specifications
Specifications
Refer to the 86100A/B on-line help for information on mainframe, horizontal (time-base), trigger, and front/rear panel input and output specifications. Touch/click Help, Contents, Specifications for a menu of the desired specifications.
1-14
General Information
Recommended Test Equipment
Recommended Test Equipment
The following table is a list of the test equipment required to test performance, calibrate, adjust,
and troubleshoot this instrument. The table indicates the critical specification of the test equipment and for which procedure the equipment is necessary. Equipment other than the recommended model may be used if it satisfies the critical specification listed in the table.
Table 1-5. Recommended Test Equipment
Equipment
Required
DMM 6 1/2 digit, 0.1 mV resolution, DC
Adapter BNC (f) to dual banana (m) Agilent 1251-2277 P
Plug-in Module 54750A, 82480A, or 86100A series
Synthesized CW
Generator
Timing Generator No Substitution Agilent 8133A standard
Function Generator 10 MHz square wave, 120 mV output,
Critical Specifications Recommended Model
Agilent 3458A P
accuracy 0.05% or better
Agilent 54751A, 83483A,
plug-in with dual electrical inputs
No Substitution Agilent 83712B
stability 0.05 ppm/yr
86112A
Required Options:
1E5 High Stability
Timebase
Recommended Options:
1E1— Output Step
Attenuator
1E8 — 1 Hz Frequency
Res.
1E9 — 3.5 mm RF Out
Connector
or Option 002
Agilent 3325B Option
001 or Agilent 33250A
Use
P, A
P, A
P, A
P
a
Attenuator 20 dB, DC to 18 GHz Agilent 33340C
(for Agilent 83712B
without built-in
attenuator)
Power Splitter (2) DC to 18 GHz Agilent 11667B P
Transition Time
Converter
Cable, BNC
Adapter, BNC (m) to
SMA (m)
Cable Assembly, 3.5
mm (m) to 3.5 mm
(m) (2 each)
2000 ps Agilent 15438A P, A
Ω, 122 cm (48 in)
50
50
Ω
61 cm (24 in); Frequency range to DC
to 26.5 GHz
Agilent 10503A P, A
Agilent E9633A BNC
(m) to SMA (m), 50
Agilent 11500E P, A
Ω
P
P, A
1-15
General Information
Recommended Test Equipment
Table 1-5. Recommended Test Equipment
Equipment
Required
Adapter, 3.5 mm (f)
Critical Specifications Recommended Model
DC to 34 GHz Agilent 1250-1749 P
to 3.5 mm (f) (2
each)
a. P = Performance Tests, A = Adjustment Tests, T= Troubleshooting
Use
a
1-16
General Information
Preventative Maintenance
Preventative Maintenance
The following tasks should be performed at the yearly calibration interval.
Perform Mainframe Modification Inspection—86100A
Verify that the following modifications have been installed on your 86100A DCA.
Intermittent Front
Panel Keypads
Intermittent or Slow
Floppy Disk Reads
Service Note 86100A-01
Serial Number: US4032 and below
Early production units had keypad assemblies with carbon ink on the printed circuit boards together with silver contacts on the rubber keypads. Over time resistance builds up on the contacts.
Newer keypads have carbon contacts.
This modification involves replacing the entire A7 Front Panel Assembly with the exchange front
panel assembly (refer to ”Replaceable Parts—86100A” on page 5-1 for the A7 Front Panel As-
sembly part number). The defective assembly must be returned to Agilent for credit.
Refer to ”To Remove the Mainframe Front Panel” on page 4-7 as applicable.
Service Note 86100A-02
Serial Number: US4106 and below
On early DCA mainframes, the LS-120 disk drive would occasionally experience difficulty with
read and write operations.
A new ground connection was added on the A16 LS-120 Adapter Board Assembly. Replace the
A16 (part number 86100-66505) with the newer assemblies. Some DCAs may have already
received this modification; refer to Figure 4-15 on page 4-13. The new board assemblies have a
large ground trace added to the connector.
Refer to ”LS-120 Disc Drive Modification (86100A Only)” on page 4-12 as applicable.
Intermittent Problems
with Vertical
Calibrations or
Vertical Trace
Service Note 86100A-03
Serial Number: US4032 and below
On early DCA mainframes, the PLDs on the A13 Acquisition Assembly would occasionally go
into a write mode on power up. This will cause various symptoms such as vertical cal failure,
vertical trace at top or bottom screen, and loss of control of the vertical trace. Sometimes the
DCA fails to completely boot up leaving just the splash screen and the DCA buttons displayed.
Rebooting the DCA fixes the problem. If the DCA boots up properly, the problem will not
appear again.
Installing a PLD header plug on a connector on the A13 Acquisition Assembly can solve the
PLD lockup problem.
Refer to ”A13 Acquisition Board PLD Header Modification (86100A Only)” on page 4-36 as
applicable.
1-17
General Information
Preventative Maintenance
Plug-in Modules Not
Recognized by the
DCA Mainframe
Service Note 86100A-04
Serial Numbers below US4017:
On early DCA mainframes, some modules are not recognized by the DCA. Usually the problem
occurs when a clock recovery module is installed together with another module.
Various modifications were performed on the A13 Acquisition board assembly to solve this
problem. The modifications are not possible in the field.
To determine whether the A13 Acquisition board assembly has been modified, remove it from
the mainframe and examine U55 (see Figure 1-1). If U55 is a Motorola part, the board assembly
has not been modified and must be replaced.
Figure 1-1. U55 location
Replace the entire A13 Acquisition board assembly with the A13 exchange assembly. DCAs
with option 001 (divided trigger) will need to have the option 001 replacement assembly. Look at
the serial tag on the rear panel to see if option 001 is installed.
Refer to ”To Remove the A13 Acquisition (Option 001)” on page 4-32 as applicable.
Perform a Mainframe
Timebase Adjustment
Perform a Touch
Screen Alignment
Perform Front Panel
Knob and Key Test
Perform Mainframe Maintenance—86100A and 86100B
For users who need pre-data at the yearly calibration interval, a verification process must be done
first. Otherwise, a yearly Horizontal Timebase Adjustment is recommended before performance
verification is started. Refer to “86100A/B Mainframe Timebase Adjustment” on page 3-3.
1 On the DCA screen, click/touch Utilities, Touch Screen Config, Calibration, Calibrate.
2 Using a touch screen stylus, such as Agilent Part Number 1535-5214, follow the on-screen
instructions and click on the three alignment dots.
3 Close the dialog boxes when the tests are complete.
1 On the DCA screen, click/touch Help and About.
2 On the DCA front panel, press the Local hardkey 5 times (until Service Mode enabled is
displayed).
3 On the DCA screen, click/touch Utilities, Service, and Self Test.
4 Perform all self-tests starting with the front panel test. Select Front Panel and press Start Test.
1-18
Run Scan Disk
Mainframe Serial
Number Entry
General Information
Preventative Maintenance
5 Check that all keypads are working properly. If any are intermittent, the keypads will need to be
replaced.
6 Continue with the Screen Test, Touch Screen, and All Non-interactive.
1 On the DCA screen, click/touch Help and About 86100A(or B).
2 On the DCA front panel, press the Local hardkey 5 times (until Service Mode enabled is
displayed).
3 On the DCA screen, click/touch Utilities, Service, Exit Scope.
4 On the DCA screen, click/touch Start, Programs, Accessories, System Tools, Scan Disk.
5 Select Standard Test and click/touch Start.
6 If there are any errors after the completion of the test, select Repair the Errors and press OK.
7 Close the dialog boxes and cycle power.
(Perform this procedure if the hard drive has been replaced)
1 On the DCA screen, click/touch About 86100A(or B) under the Help menu.
2 On the DCA front panel, press the Local hardkey 5 times (until Service Mode enabled is
displayed).
3 On the DCA screen:
a Close the About 86100A(or B) dialog box (Click/touch Close).
b Click/touch Utilities, Service, Frame.
c Click/touch the entry field in the Frame dialog box (the touch screen keypad opens).
d Enter the mainframe serial number (from the rear panel serial tag).
e Click/touch OK.
f Click/touch Save.
4 Check the serial number entered:
a Click/touch Help
b Click/touch About 86100A(or B).
Confirm the new serial number appears in the dialog box.
Clean Display Use a soft cloth and multi-purpose anti static cleaner for computers. Spray cleaner on the cloth
(not directly on the screen), and clean the screen with the cloth.
Clean Fans Remove the cover and vacuum the fans using a small vacuum designed for computer systems.
1-19
General Information
Preventative Maintenance
1-20
2
Performance Verification 2-2
Time Interval Accuracy Performance Test 2-3
Front Panel Cal Signal 2-11
Jitter Performance Test 2-13
Trigger Verification (Standard and Option 001) 2-18
Performance Test Record 2-24
Performance Verification
Performance Verification
Performance Verification
Performance Verification
This chapter documents the performance tests. Equipment required for individual tests is listed in
the test descriptions in this chapter. Equipment satisfying the critical specifications listed may be
substituted for the recommended model.
Performance Testing
Interval
Specifications The specifications that apply to a particular test are listed in chapter 1 of this manual. Refer to the
Performance Test
Record
Before Testing
The performance test procedures may be performed for incoming inspection of the instrument
and should be performed periodically thereafter to ensure and maintain peak performance. The
recommended test interval is yearly or every 2,000 hours of operation.
86100A/B on-line help for specifications.
You may record the results of the performance tests in the Performance Test Record provided at
the end of this chapter. The Performance Test Record lists the performance tests and provides an
area to mark test results. You can use the results recorded at incoming inspection for later comparisons during periodic maintenance, troubleshooting, and after repairs or adjustments.
• Warm up the system for at least 60 minutes prior to beginning the performance tests.
• After sufficient warm up, perform a vertical calibration on the system.
• Avoid damage to plug-in front panel connectors. Use 2.4 mm and 3.5 mm connector savers. These
connector savers are a supplied accessory.
• Minimize connector swapping during the procedures to avoid connector wear. All connectors on
test tools and adapters should be inspected both visually and mechanically every few calibrations.
• All connectors should be clean and undamaged to ensure accurate measurements. All 2.4 mm and
3.5 mm connectors should be mechanically and visually checked before inserting any calibration
test tool into them. Damaged connectors or loose connectors may cause the performance verification tests to fail.
• Avoid sharp bends in 2.4 mm, 3.5 mm, SMA, and optical cables. When mating 2.4 mm to 2.4 mm
or 3.5 mm to 3.5 mm, torque all connections to 8 in/lbs. When mating 3.5 mm to SMA or SMA
to SMA, torque all connections to 5 in/lbs.
CAUTION The module inputs are very sensitive to static discharge. Failure to observe proper antistatic
procedures may damage the gallium arsenide samplers. ESD damage is not covered under the
warranty. All maintenance or operation should be performed with an antistatic mat and wrist strap.
Refer to “Electrostatic Discharge Information” on page 1-9 for further information.
CAUTION Electrostatic discharge can seriously damage the module’s electrical inputs. To eliminate any
electrostatic build up from a cable you’re connecting to the module, connect a female short to
either end of the cable. Touch the short to an input connector hex nut on the module to discharge
any static build up to ground. Remove the short. Use this procedure for all cables before
connecting them to the module.
2-2
Performance Verification
Time Interval Accuracy Performance Test
Time Interval Accuracy Performance Test
The horizontal time interval accuracy of the mainframe and plug-in modules are compared to a
known reference.
Equipment Required
Equipment Critical Specifications Recommended Model/Part
Plug-in Module 54750A, 82480A, or 86100A series
plug-in with electrical input
Synthesized CW
Generator
Timing Generator No substitution Agilent 8133A standard or
Function/Arbitrary
Waveform Generator
Transition Time Converter 2000 ps Agilent 15438A
Cable, BNC
Adapter, BNC (m) to
SMA (m)
No substitution Agilent 83712B
10 MHz square wave, 120 mV output,
stability 0.05 ppm/yr
Ω, 122 cm (48.in)
50
50 Ω
Agilent 54751A, 83483A,
86112A
Required Options:
1E5 High Stability Timebase
Recommended Options:
1E1— Output Step
Attenuator
1E8 — 1 Hz Frequency Res.
1E9 — 3.5 mm RF Out
Connector
Option 002
Agilent 3325B Option 001
or Agilent 33250A
Agilent 10503A
Agilent E9633A BNC (m) to
SMA (m), 50
Ω
Procedure
Cable Assembly, 3.5 mm
(m) to 3.5 mm (m) (2
each)
Adapter, 3.5 mm (f) to 3.5
mm (f) (2 each)
61 cm (24 in); Frequency range of dc
to 26.5 GHz
dc to 34 GHz Agilent 1250-1749
Agilent 11500E
Period Accuracy for Delay Settings
1 Warm up the system for at least 60 minutes, then perform a vertical calibration.
2 Connect the equipment as shown in Figure 2-1.
2-3
Performance Verification
Time Interval Accuracy Performance Test
a Connect the synthesized CW generator’s 10 MHz OUT to the timing generator’s timebase
EXTERNAL INPUT.
b Connect the 2000 ps transition time converter to the timing generator’s CHANNEL 2 output.
c Connect the 2000 ps transition time converter to the DCA front panel trigger input, using the
cable and adapters.
d Connect the synthesized CW generator OUTPUT to the desired module electrical channel.
Figure 2-1. Time Interval Accuracy Setup
3 Set the timing generator controls as follows:
a Turn on the timebase EXT and EXT DIVIDE, and set to divide by one.
b Set the CHANNEL 2 output as follows:
SQUAR ON
AMPL 2.5 V
OFFS 0
DISABLE OFF
4 On the synthesized CW generator, press PRESET, then set the controls as follows:
FREQ 19.98 GHz
POWER LEVEL 0 dBm
RF ON/OFF OFF
5 On the DCA front panel, press the Default Setup hardkey.
6 On the DCA screen, press Time Delay, set the scale to 10 ps/div, and set the Delay From Trigger
to 24 ns. See Figure 2-2.
2-4
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