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SERVICE MANUAL
HP 16532A
1 GSa/s Di g i t i zing
Oscilloscope
COPYRIGHT HEWLETT-PACKARD COMPANY,
COLORADO SPRINGS DIVISION 1991-1993
1900 GARDEN OF THE GODS ROAD, COLORADO SPRINGS, COLORADO U.S.A.
ALL RIGHTS RESERVED
Manual Part No. 16532-97002 PRINTE D: JULY 1993
SAFETY CONSIDERATIONS
GENERAL - Thi s is a Safety C lass I instrument (provided with
terminal for protective earthing ).
OPERATION - BEFORE APPLYING POWER verify that the
power transformer primary is matched to the available line
voltage, the correct fuse is installed, and Safety Precautions
are taken (see the following warnings). In addition, note the instrument’s external markings which are described under
"Safety Symbols."
•Ser vicing instructions are for use by service-trained personnel. To avoid dangerous elec tric shock, do not perform
any servicing unles s qualified to do so.
•BEFORE SWITCHING ON THE INSTRUMENT, the protective earth terminal of the instrument must be connected to
the protective conductor of the (mains) powercord. The
mains 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 e x tension cord
(power cable) without a protective conductor (grounding).
Gr ou nding one conductor of a two-conductor outlet is not
sufficie nt protec tion.
•If this instrument is to be e nergized via an auto-transformer (for v oltage reduction) make sure the common terminal is connected to the earth terminal of the power
source.
•Any interruption of the protective (grounding) conductor
(ins i de or outside the in strument) or disconnecti n g the protective earth terminal will cause a potential shock hazard
that could result in personal injury.
•W henever it is likely tha t the protec tion has been impaired, the instrument must be made inoperative and be
sec ur ed against any unintended operation.
•Only fuses with the required rated current, voltage, and
specified type (normal blow, time delay, etc.) should be
used. Do no t use repaired fuse s or short circuited fuseholders. To do so could cause a shock or fire hazard.
•Do not operate the instrument in the presence of flammable gasses or fumes. Operation of any electrical ins trument in such an environment constitutes a definite safe ty
hazard.
•Do not in stall substitute parts or per form any unautho rized
modification to the instrument.
•A djustments described in the manual are performed with
power supplied to the instrument while protective covers
are r e move d. E ne rgy available at many points may, if contacted, result in personal injury.
•A ny adjustment, maintenance, and repair of the opened instrument under voltage should be avoided as much as
possible, and when inevitable, should be carried out only
by a skilled person who is aware of the hazard involved.
•Capacitors inside the ins tr ument may still be charged
even if the instr ument has been disconn ected from its
source of supply.
SAFETY SYMBOLS
Ins tr uction manual sy mbol. The product will be
marked with this symbol when it is necessary for
the user to refer to the instruction manual in order
to protect against da mage to th e product.
Indicates hazardous voltages
Earth terminal (sometimes used in manual to indicate circuit common connected to grounded
chassis).
The WARNING sign denotes a hazard. It
calls attention to a proce dure, practice,
or the like, which, if not correctly performed or adhered to, could result in personal injury. Do not
proceed beyond a WARNING sign until the indicated conditions are fully understood and met.
The CAUTION sign denotes a hazard. It
calls attention to an operating procedure,
practice, or the like, which, if not correctly performed or adhered to, could result in damage to or
destruction of part or a ll of the product. D o not proceed beyond a CAUTION sign until the indicated conditions are fully
understood or met.
SC1D98 4
HP 16532A - Table of Contents
CONTENTS
SECTION I
General Informatio n
1-1 . I ntroduction .............................................................................................................................. 1-1
1-2. Module Covered by This Manua l ............................................................................................ 1-1
1-3. S a fe ty R e quirements ............................................................................................................... 1-1
1-4. P roduct Description ................................................................................................................. 1-2
1-5. A ccessories Supplied .............................................................................................................. 1-2
1-6. A ccessories Available............................................................................................................... 1-2
1-7. S pecifications ........................................................................................................................... 1-2
4-6. Recommended Test Equipment ..............................................................................................4-2
4-7 . I ns trument W a rmup.................................................................................................................. 4-2
4-8. Ca libration................................................................................................................................. 4-2
4-9 . Setting the PROTE C T/UNPROTECT S witch to UNPROTECT................................................ 4-3
4-10. Equipment R e quired for Calibration ....................................................................................... 4-4
4-1 1. Loading the Def ault Calibration Fa ctors................................................................................. 4-4
4-12. Self Cal Menu Calibrations...................................................................................................... 4-5
4-1 3. Setting the P ROTECT/UNPROTECT Switch to PRO TECT.................................................... 4-8
4-14. Sealing the Mainframe............................................................................................................. 4-8
Section V
Replaceable Parts
5-1 . I ntroduction .............................................................................................................................. 5-1
5-2. A bbreviations ........................................................................................................................... 5-1
5-3. Replaceable Parts List ............................................................................................................. 5-1
5-4. Ordering Information ............................................................................................................... 5-1
5-5. E xchange Assemblies ............................................................................................................. 5-1
5-6. Direct Mail Order System ........................................................................................................ 5-2
SECTION VI
Service
6-1 . I ntroduction .............................................................................................................................. 6-1
6-2. S a fe ty R e quirements ............................................................................................................... 6-1
6-3. Recommended Test Equipment ............................................................................................. 6-1
6-4. Module Block Diagram and Theory of Operation ................................................................... 6-1
6-5. A ttenuator Theory of Operation............................................................................................... 6-1
6-6. Main A s se mbly Theory of Operation ....................................................................................... 6-1
6-7. S e lf-Tests .................................................................................................................................. 6-4
1-9. Recommended Test Equipment ..........................................................................................1-2
1-1. Introduction
HP 16532A - General Information
SECTION I
General Informatio n
Th e service policy for this instrument is re pla ce ment of defective asse mblies. This service guidel
contains information for finding a defective
assembly by testing and servicing the HP 16532A
1 GS a/s Oscilloscope Module. Also included in
the guide are installation procedures and a list of
recommended test equipment. This guide is
divided into six sections as follows:
I - General Information
II - Installation
III - Performance Tests
IV - C a libration
V- Replaceable Parts
V I - Service
Th e G e ne ra l I nformation S e ction includes safety
requirements, a product description, and a list of
accessories supplied and of accessories available.
Also included are table s lis ting specifications and
operating characteristics, and a list of
recommended test equipment.
To complete the service documentation for your
HP 16500 Logic Analysis System, place this
serv ice manu a l in the 3 - ring binder with your other
logic analysis system Service Guides.
1-2. Mo d ule Covered by This Manual
Th e inf ormation covered in this ma n ual is for the
HP 16532A 1 GSa/s Oscilloscope Module.
1-3. Safety Requirements
Specific warnings, cautions, a nd instructions are
placed wherever applicable throughout the
manual. These must be observed during all
pha ses of operation , serv ice, and repair of th e
module. Failure to comply with them violates
safety standards of design, manuf acture, and
intended use of this module.
Hewlett-Packard assumes no liability for the f a ilure
of the customer to comply with these safety
requirements.
1-1
HP 16532A - General Information
1-4. Product Description
The HP 16532A Oscilloscope Module is a 1 GS a /s
digitizing oscilloscope. Some of the main f eatures
are:
•1 GSa/s digitizing for 250 MHz bandwidth sin-
gle shot analysis.
•8000 samples per channel.
•Automatic pulse parame te rs , dis plays time be-
tween ma rke rs , acquires until specifie d time
between ma rke rs is captured, performs sta tis tical analys is on time betwee n ma rke rs .
•Lightweight miniprobes.
1-5. Accessories Supplied
Th e following accessories are supplied with the
HP 16532A Oscilloscope module. Quantity one
unless shown otherwise.
•Use r’s Reference an d P rogramming Refer-
ence set
•24-pin IC test clip (HP 10211A)
•BNC-to-BNC ac coupling capacitor
(HP 10240B)
10:1 Probe:
•1-MΩ, 7.5- pf miniprobe, 1 m (HP 10435A )
1:1 Probes:
•40-pf miniprobe, 1 m (HP 10438A)
•64-pf miniprobe, 2 m (HP 10439A)
•50-Ω miniprobe, 2 m (HP 10437A)
100:1 Probe:
•10-MΩ, 2.5- pf miniprobe, 2 m (HP 10440A )
1-7. Specifications
Module specifications are listed in table 1-1. These
specifications are the performance standards
against which the module is tested.
•Service G uide
•HP 10441A 10:1 probes, Qty 2
•Right angle BNC adapters, Qty 2
•BNC miniprobe adapter
•Mas te r- slave trigger cable
•Operating Sys tem Software
1-6. Accessories Available
•10:1, 100:1, 50 Ω, 10 pf resistive divider probe
set, 1.2 m (HP 10020A)
•BNC-to-BNC cable, 1.2 m (HP 10503A)
1-8. Operating Characteristics
Ta ble 1 - 2 is a listing of the module operating
characteristics. The operating characteristics are
not specifications, but are the typical operating
characteristics included as a dditional information
for the user.
1-9. Recomme nded Test
Equipment
Equipment required to test and maintain the
HP 16532A Oscilloscope Module is listed in table
1-3. Other equipment may be su bstitute d if it
meets or e xceeds the critical specifications lis ted
in the table.
1-2
HP 16532A - General Information
Table 1-1. HP 16532A Specifications
HP 16532A SPECIFICATIONS
Type: 2- chann el s imulta ne ous a cquisition
(* ,1)
Bandwidth
Maximum Sample Rate: 1 Gigasample per second
Number of Channels: 2, 4 , 6, 8 simultaneous chan ne ls using the same time bas e setting(s)
OR
Up to 10 chan nels with independent time bas es for each pair of channe l s .
Up to 18 chann e ls with the HP 16501A Expansion Frame.
Rise Time
ADC: 8-bit real time
Vertical Resolution: 8 bits ov er 4 v ertical divis i ons (± 0.4%)
Waveform Record Length: 8000 points
Time Interval Measurement Accuracy
Vertical (dc) Gain Acc ura c y
DC Offset Accurac y
Voltage Measurement Accuracy
Trigger Sensitivity
: dc to 250 MHz (real time, dc-coupled)
(2)
: 1.4 ns
(*,3,6)
(4)
: ± 1.5% of full scale
(* )
: ± (1.0 % of channel offs et + 2.0% of full scale)
(* ,5)
: ± [(1.5% of full scale + offse t a ccuracy) + (0.008 x V/div)]
(* )
: dc to 50 MHz: 0.063 x full scale, 5 0 to 250 MHz: 0.125 x full scale
* Specifications (valid within ± 10° C of auto-calibration temperature , e xcluding bandwidth− see
note 1 for bandwidth specification.)
1. Upper bandwidth reduces by 2.5 MHz for every degree C above 35° C.
=
bandwidth
0.35
1
sample rate
2. Rise time is calculate d from the formula:
3. S pe cification applies to the maximum s ampling rate. At lower rate s, the specification is:
± [(0.005% x ∆t)+ (2 x 10
= 1.4 x sa mple inte rval). Sample interval is def ined as
(t
r
-6
x delay setting) + (0.15 x sa mple inte rv a l)] for bandwidth limited signals
t
r
4. Vertical gain accuracy decreas es 0.08 % per degree C fr om softwa re ca li bration tem perature.
5. D i gitizi ng le vel = (# ve rtical div isions)(
1
)(
), where LS B = 2
LSB
2
# bits in ADC
1
6. The Time Inte rv al Measurement Accuracy deteriorates across multiple modules connected as one
unit with ea ch a dded module.
1-3
HP 16532A - General Information
Table 1-2. HP 16532A Operating Characteristics
HP 16532A OPERATING CHARACTERISTICS
VERTICAL (at BNC)
Vertical Sensitivity Range (1:1 Probe):
4 mV/div to 10 V/div in 1-2-4 increments
DC Offset Range (1:1 Probe):
V e rtical SensitivityAvaila ble Offse t
4 mV/div to 100 mV/div± 2 V
> 100 mV/div to 500 mV/div± 10 V
> 500 mV/div to 2.5 V/div± 50 V
> 2.5 V/div to 10 V/div± 250 V
Probe Factors:
Any integer ratio from 1:1 to 1000:1
Maximum Safe Input Voltage:
1 MΩ: ± 250 V [dc + peak ac (< 10 KHz)]
50 Ω: ± 5 VRMS
Channel-to-Channel Isolation:
dc to 50 MHz: 40 dB, 50 MHz to 250 MHz: 30 dB
TIM EBASE
Range:
1 ns/div to 5 s/div
Resolution:
20 ps
Delay Pre-trigger Range:
Ti me /div SettingAvailable Delay
1 µs to 5 s/div-8 x (s/div)
1 ns to 500 ns/div-4 µs
Delay Post-trigger Range:
1-4
Ti me /div SettingAvailable Delay
100 ms to 5 s/div2.5 ks
1 µs to 50 ms/div33,500 x (s/div)
1ns to 500 ns/div16.7 ms
TRIGGERING
Trigger Level Range:
Trigger Modes:
Immediate:
Edge:
Pattern:
HP 16532A - General Information
Table 1-2. HP 16532A Operating Characteristics (cont.)
Within display window (full scale an d offset)
Triggers imme diate ly a f ter a rming condition is met.
Triggers on rising or falling edge of any internal channel or external trigger,
count adjustable f rom 1 to 32,000.
Triggers on ente ring, e xiting, duration greater tha n, duration less than, and
duration in range for a specified pattern of both internal channels an d external
trigger, count adjustable from 1 to 32,000. Duration time range is adjustable
from 20 ns to 160 ms in 10 ns steps. Duration accuracy is approximately ± 3%
± 2 ns.
Auto-Trigger:
If enabled, the module will se lf-trigger if no trigger condition is found within
approximately 50 ms after arming.
Events Dela y:
Th e trigger can be s et to occur on the nth edge or pattern, as specified by the
user. The number of eve nts (n) can be set from 1 to 32,000 events. Maximum
count frequency is 7 0 MH z .
Intermodule:
Arms a n other mea sure me nt module or triggers the re a r pane l B NC .
Exte rn a l:
If ena bled, the oscilloscope will trigger on an ECL lev e l s ignal (-1 . 3 V).
DIGITIZER
Resolution: 8 bits (1 part in 256)
Digitizing Rate: Up to 1 Gigasample per second
Digitizing Technique: Re al-time digitizing; each 8000 samples are acquired on a single acquisition
Acquisition Memory Size: 8000 samples per channel
1-5
HP 16532A - General Information
Table 1-2. HP 16532A Operating Characteristics (cont.)
WAVEFORM DISPLAY
Displayed Wavefo rms:
Eight wave f orm windows maximum, with scrolling across 96 wav e f orms.
Display Forma ts:
W avef or m s can be di splayed in an overla pping and/or n on -overlapping for m at.
Displa y capability of A − B and A+ B is also provided.
Display Resolution:
500 points horizontal, 240 points vertical
DISPLAY MODES
Normal (Single):
New acquisition replaces old acquisition on screen.
Accu mu l at e:
New acquisition is displayed in addition to previous acquisitions until screen is
erased.
Average:
New a cquisitions are a veraged with old acquisitions, with the u pdated wa v eform
displayed until era s e d. M a ximum number of a v e rages is 256.
Overlay:
Up to 8 acquired waveforms from separate channels can be ove rla ye d in the
same display area.
Connect-the-dots:
Provides a displa y of the s ample points connected by straight lines.
Waveform Reconstr uction:
Wh e n the re is insufficient data to fill every horizontal location, a post acquisition
reconstruction filter fills in missin g data points for time bas e < 50 ns /div.
Waveform Math:
1-6
Displa y capability of A − B and A+ B functions is provided.
Table 1-2. HP 16532A Operating Characteristics (cont.)
MEASUREMENT AIDS
Time Markers:
Tw o vertical marke rs , X and O, are provide d for measurements of time and
voltage. Capabilities a re : measure voltage at point where X and O markers
cross each a n alog wave f orm; measu re time from trigger to X, trigger to O, and
X to O; automatic marker placement by specifying percentage of edge, edge
number, and rising or falling edge type; run until X to O > than, < than, in
range, and not in range provides selective event search; X to O statistics (mean,
max, an d min) provide analysis of time interval de v i a tion.
Automatic Search:
Se arches for a pe rcenta ge or an absolute voltage level at a positive or ne ga tiv e
edge, count adjusta ble from 1 to 100.
Auto Search Statistics:
HP 16532A - General Information
Mea n, maximum, and minimum val u e s f or e l a ps e d time f rom X to O markers for
multiple runs. Number of val id runs a n d total number of runs av a i la ble .
Automatic Measurements:
The following pulse paramete r me a s ure me nts can be performed automatically:
Freque ncyR is e time+ pulse width
Pe riodFall time− pulse width
V p-pPreshootV
Overshoot
Grid:
Gr aticules can be display ed in backr ou n d of waveform.
Voltage Markers:
Tw o horizontal marke rs, A and B, ar e provided for voltage measurements.
Th e se markers can each be placed on any a cquisition channel trace. A delta
volt age display provi des delt a V between m arkers on t h e same chann el or
between two channels .
amplitude
*
(*gives difference between top and base
voltages; only available over bus)
1-7
HP 16532A - General Information
Table 1-2. HP 16532A Operating Characteristics (cont.)
SETUP AIDS
Autoscale:
Autoscale s the vertical and horizontal ran ges , offset, and trigger level to display
the input signals. Requires a frequency between 50 Hz and 250 MHz.
Presets:
Scale s the vertical range, off s et, and trigger lev el to predetermined va l u e s f or
displaying ECL or T TL waveforms.
Calibration:
V e rtica l, trigger, del a y, and all defaults. Calibration fa ctors stored in NV-RAM on
the circuit board.
Probe Compensation Source:
External BNC supplies a square wa ve approximately 0.0 mV to -800 mV into the
open circuit at approximately 1000 Hz.
OPERATING ENVIRONMENT
Temperature:
Instrument, 0° to 55° C (+ 32 ° to 131° F). Probes and cables, 0° to 65° C (+ 32°
to 149° F).
Humidity:
Instrument, u p to 95% relative humidity a t + 40° C (+ 104° F). Recommended
disk media, 8% to 80 % relative humidity at + 40 ° C (+ 104° F).
Altitude:
To 4600 m (15,000 ft).
Vibration
Operation:
Random vibration 5-500 Hz, 10 minutes per a xis, ~ 0.3 g (rms).
Non-operating:
Random vibration 5-500 Hz, 10 minutes per a xis, ~ 2.41 g (rms); an d swe pt
sine resonant search, 5-500 Hz, 0.75 g (0- peak), 5 minute resonant dwell @ 4
resonances per axis.
2-8. S torage ................................................................................................................................ 2-4
2-9. P a ckaging ........................................................................................................................... 2-4
2-10. Tagging for Service ............................................................................................................. 2-4
HP 16532A - Installation
SECTION II
Installation
2-1. Introduction
This section explains how to initially inspect the
HP 16532A Oscilloscope Module, then how to
prepare it for use, storage, and shipment. Also
included are procedures for module installation.
2-2. Initial Inspection
Inspect the shipping container for damage. If the
shipping container or cushioning material is
damaged, it should be kept until the contents of
the shipment have been checked for
completeness and the module has been checked
mechanically and electrically. The contents of the
shipment should be as lis te d in the "Accessories
Supplied" paragr aph located in Section I.
Procedures for checking electrical performance
are in Section III. If the contents of the container
are incomplete, there is mechanical damage or
defect, or the instrume nt does not pass the
performance tests, notify the nearest
Hewlett-Packard sales office.
2-4. Power Requirements
All power supplies required for operating the
HP 16532A Oscilloscope Module are supplied to
the module through the backplane connector in
the mainfra me .
2-5. Safety Requirements
Specific warnings, cautions, a nd instructions are
placed wherever applicable throughout the
manual. These must be observed during all
pha ses of operation , serv ice, and repair of th e
module. Failure to comply with them violates
safety standards of design, manuf acture, and
intended use of this module.
Hewlett-Packard assumes no liability for the f a ilure
of the customer to comply with these safety
requirements.
2-6. Module Installation
If the shipping container is damaged, or the
cushioning material shows signs of stress, notify
the carrier as w e ll a s the Hewlett-Packard sa l e s
office. Keep the shipping material s o the carrie r
can inspect it. Th e H e wle tt-P a ckard office will
arrange for repair or replacement at
Hewlett-Packard’s option without waiting for claim
settlement.
2-3. Preparation for Use
Rea d the Safety Considerations in the front of
this manual and in Section I bef or e in s t alling
or operating this module.
Do not ins tall, remove, or replace the module
in the instrument unless the instrument power
is turned off.
The HP 16532A Oscilloscope Module will take up
one slot in the card cage. For ev e ry a dditional
HP 16532A Oscilloscope Module you install, you
will need an a dditional slot. Th e y may be insta lle d
in any slot and in any order. The installation
procedure for the module is continued,
step-by-step, on the next page.
2-1
HP 16532A - Installation
Module Installation (cont. )
The effects of ELECTROSTATIC D ISCHARGE can damage electronic components. U se grounded wrist straps and mats when you are performing any kind of
service to this module.
Installation Considerations
•The HP 16532A Oscilloscope Modules can be installed in any available card slot.
•For multiple modules connected as one unit, the master card must be placed in the sl ot above the
expander cards. The ma s ter card and expander cards must be in adjoining slots.
•Cards or filler panels bel ow the empty slots intended for module installation do not have to be re-
moved to install a module above them.
Proced u r e:
1. T urn i ns trume nt power switch off, unplug power cord and disconnect any input connections.
2. Starting from the top, loosen the thumb screws on the filler panels and cards.
3. Starting from the top, begin pulling out the cards and filler panels halfw ay . S e e figure 2-1.
Figure 2-1. Endplate Ov erlap - Top Se quence
2-2
HP 16532A - Installation
4. S lide the oscilloscope module into the card cage approximately halfway.
5. If you hav e more oscilloscope cards to install, slide them into the card cage approximately halfw a y.
6. F irmly s eat the bottom card into the backplane connector. Keep applying pressure to the center
of the card endplate while tightening the thumb screws finger tight.
7. Repeat step 6 for all cards and filler panels in a bottom-to-top order. See figure 2-2.
8. A ny fille r pane ls tha t a re not used should be kept for future use. Fille r pane ls must be i nstalled in a l l
unused card slots for correct air circulation.
F igure 2-2 . Endplate Overlap - Bottom S equence
2-3
HP 16532A - Installation
2-7. Operating Environment
Th e operating env ironment is lis te d in table 1-2 of
Se ction I of this manu a l. N ote s h ould be made of
the non-condensing humidity limitation.
Condensa tion within the instrume nt can cause
poor oper ation or mal f u n ct ion . Protection s h ou l d
be provided against internal condensation.
The HP 16532A Oscilloscope Module will operate
at all specifications within the te mpera ture an d
humidity range giv en in table 1- 2. Howeve r,
reliability is enhanced when operating the module
within the following ranges.
•Temperature: + 20 °C to + 35 °C (+ 68 °F to
+ 95 °F)
•Humidity: 20% to 80% non-condensing
2-8. Storage
T h e module may be stor e d or shipped in
environments within the following limits:
2-9. Packaging
The following general ins tructions should be us ed
for repacking the module with commercially
availa ble ma teria ls .
•Wr a p the module in antistatic plastic.
•Use a strong shipping container. A double-
walled carton made of 350-lb test material is
adequate.
•Use a layer of shock-absorbing material 70 to
100 mm (3- to 4-inch) thick around all sides of
the module to provide firm cushioning and to
prevent movement within the container.
•Seal the shipping container securely.
•Mark the shipping container FR AGILE to en-
sure proper handling.
•In any correspondence, refer to the module
by its model number and serial number.
•Temperature: − 40 °C to + 75 °C
•Humidity: Up to 90% at 65 °C
•Altitude: Up to 15,300 meters (50,000 feet)
The module should also be protected from
temperature extremes which cause condensation
on the instrument.
2-10. Tagging for Service
If the module is to be shipped to a
Hewlett-Packard sales office for service or repair,
attach a tag showing owner (with address),
complete se ria l number, a n d a des cription of the
service required.
2-4
TABLE OF CONTENTS
Performance Tests
3-1 . I ntroduction ......................................................................................................................... 3-1
3-2. Recommended Test Equipment ........................................................................................ 3-1
3-3. Test R e cord ......................................................................................................................... 3-1
3-4. P e rformance Test Interval .................................................................................................. 3-1
3-5. P e rformance Test Procedures ........................................................................................... 3-1
3-6. DC C AL OUTPUT Test ........................................................................................................ 3-2
3-7. A C C AL OUTPUT Test ........................................................................................................ 3-3
Th e procedures in this section test the
oscilloscope module’s electrical performance
using the specifications listed in Se ction I as the
performance standards. All tests can be
performed without access to the inte rior of the
instrument. At the end of this section is a f orm that
can be used as a record of performance test
results.
3-2. Recomme nded Test Equipment
Equipment recommended for performance tests is
listed in table 1-3. Any equipment that satisfies the
critical specifications given in the ta ble ma y be
substituted for the re commended models .
3-3. Test Record
R esults of performance tests may be ta bulated on
the Performance Test Record (table 3-1) at the end
of the procedures. The test record lists all of the
tested spe cifications an d their acceptable limits.
Th e re s ults re corded on the test record may be
used for comparison in periodic maintenance a nd
troubleshooting or after repairs and adjustments
have been made.
3-4. Performance Test Interval
Pe riodic performance verification of the
HP 16532A Oscilloscope Module is required at
one-yea r inte rv als. The ins trume nt’s perf ormance
should be verified after it has been serviced, or if
improper operation is suspected. Calibration
sh ou ld be performe d before any perf or m ance
verif ication checks.
3-5. Performance Test Procedures
Al l performa n ce t e sts shou l d be performe d at the
environmental opera ting temperature of the
instrument, af te r a 30-minute warmup period.
3-1
HP 16532A - Performance Tests
3-6. DC CAL OUTPUT Test
Th e DC CAL O UTPU T port on the rear pan e l is used for ins trume nt cali bration an d probe calibration.
Th ough calibrator accuracy is not specified in the performance specifications, it must be within limits in order t o p rovide accurate calibration.
Test Limits:
5.000 V ± 10 mV
Equipment Required:
The f ollowing equipment is required for the test.
Recommended
Equipment RequiredCritical Specification
Model/ Part Number
Digital Multime te r
Cable
Adapter
Procedure:
1. Us e the BNC-to-banana adapter to connect the BNC cable betwe en the multimeter and the oscillo-
scope module DC CAL OUTPUT connector.
2. On the oscilloscope module set the following parameters in the order given:
MenuSelectionSetting
CalibrationMode
3. The DVM should read close to 0.0000 V. Record the reading to four decimal places.
V1 = __________ .
0.1 mV resolution, better than 0.005% accuracy
50 Ω BNC (m to m) 48- in ch
50 Ω BNC (f) to Dual Banana Plug
Service Calibration
Procedure
DC Volts
DC Cal BNC
0 V
HP 3458A
HP 10503A
HP 1251-2277
4. In the Calibration menu set the D C Volts to 5 V.
5. The DVM should read close to 5.0000 V. Record the reading to four decimal places.
V2 = __________ .
6. In the Calibration menu set the D C Volts to 0 V.
7. Subtract V1 from V2. The difference should be between 4.990 and 5.010 V. R ecord the reading in
the performance test record.
3-2
HP 16532A - Performance Tests
3-7. AC CAL OUTPUT Test
Th e AC CAL OUTPUT port on the rear panel is used for instrument calibration a n d probe compensation.
Th ough calibrator accuracy is not specified in the performance specifications, it must be within limits in order t o p rovide accurate calibration.
Test Limits:
1000 Hz ± 10%, 0.8 Vp_p ± 10%
Equipment Required:
The f ollowing equipment is required for the test.
Recommended
Equipment RequiredCritical Specification
Cable50 Ω BNC (m to m) 48-inchHP 10503A
Model/ Part Number
Procedure:
1. Use the BNC cable to connect the AC CAL OU TPUT to channel 1 input of the oscilloscope module.
2. On the oscilloscope module set the following parameters in the order given:
MenuSelectionSetting
Calibration
Channel
3. In the Calibration menu select AUTOSCALE.
4. In the Auto-Measure menu verif y that the w a v eform is approximately 0.8 Vp_p at approximately
1000 Hz. Record the reading in the performance test record.
Mode
Procedure
Signal
Coupling
Probe
Service Calibration
Oscillator Output
Probe Compensation
1 MΩ/DC
1:1
3-3
HP 16532A - Performance Tests
3-8. INPUT RESISTANCE
This tes t verifies the input resistance of the oscilloscope module. A four-wire measurement is used for accuracy at 50 Ω.
Specification:
1 M Ω± 1% and 50 Ω± 1%
Equipment Required:
The f ollowing equipment is required for the test. Procedures are base d on the model or part numbers recommended.
Recommended
Equipment RequiredCritical Specification
Model/ Part Number
Digital Multime te r
Cables (2)
Adapter
Adapte rs ( 2 )
Procedure:
1. S et up the multimeter to make a 4-wire resistance measurement.
2. Us e the B N C - to-banana adapters to connect one end of each BNC cable to the 4-wire resis ta nce
connections on the multimete r, a n d connect the free e n ds of the cables to the BNC Tee.
3. Connect the male end of the BNC tee to the channel 1 input of the oscilloscope module. Set up the
oscilloscope module according to the following parameters in the order given:
MenuSelectionSetting
Channel
Meas ure res is tance (4- wire ) better than 0.2 5 %
accuracy
50 Ω BNC (m to m) 48 -inch
50 Ω BNC Tee (m)(f )(f )
50 Ω BNC (f) to Dual Banana Plug
Input
Probe
V/Div
Offset
Coupling
1
1:1
20 mV
0 V
50 Ω / DC
HP 3458A
HP 10503A
HP 1250-0781
HP 1251-2277
Trigger
3-4
Mode
Immediate
HP 16532A - Performance Tests
4. Select RU N - SINGLE. The clicking of attenuator relays should be audible. V erify resistance readings on the digital multimeter of 50 Ω± 0.5 Ω (49.5 to 50.5 Ω).
5. In the Channel menu change the Coupling field to 1 MΩ/DC.
6. S e l ect RUN. The clicking of attenuator relays should be audible. Verify re s ista nce readings on the
digital multimeter of 1 MΩ± 10 kΩ (0.990 to 1.010 MΩ).
7. In the Channel menu change the Coupling field to 50 Ω/DC and V/Div to 200 mV/Div. Repeat steps
4 through 6.
8. In the Channel menu change the Coupling field to 50 Ω /DC and V/Div to 1 V/Div. Repeat steps 4
through 6.
9. In the Channel menu change the Coupling field to 50 Ω /DC and V/Div to 4 V/Div. Re peat steps 4
through 6.
10. Connect the male end of the BNC tee to the channel 2 input of the oscilloscope module.
11. Repea t steps 3 through 9 f or chann el 2, replacing channe l 1 with cha n nel 2 where applicable.
Note
If a reading is not within limits, then the attenua tor for the out-of-bounds channel
shou ld be r eplaced. See "Se r vice" in Section VI.
3-5
HP 16532A - Performance Tests
3-9. VOLTAGE MEASUREMENT ACCURACY
Thi s te st verif i e s the DC voltage measurement accuracy of the instrument. This procedure us es a dual cursor measureme nt that nullifies offse t e rror, resulting in the following measure me nt:
± [(1.5% of full scale) + (0.016 x V /div)].
Specification:
± [(1.5% of full s cale + offset accuracy) + (0.008 x V/div)]
Equipment Required:
The f ollowing equipment is required for this test. Procedures are bas ed on the model or part numbers recommended.
Recommended
Equipment RequiredCritical Specification
Model/ Part Number
DC Power Supply
Digital Multime te r
Cable
Adapter
(cable to power supply)
Adapter
Blocking Capacitor
-14 Vdc to + 14 V dc, 0.1 mV re s olution
Better than 0.1% accuracy
50 Ω BNC (m to m) 48-i nch
50 Ω BNC (f) to Dual Banana Plug
50 Ω BNC tee (m)(f)(f)
50 Ω BNC (m to f) 0.18 µF, 200 V
HP 6114A
HP 3458A
HP 10503A
HP 1251-2277
HP 1250-0781
HP 10240B
3-6
HP 16532A - Performance Tests
Proced ure:
1. Using a BNC adapter, connect one end of the cable to the power supply. Connect the BNC tee,
the blocking capacitor, and the s h orting endcap to the other end of the cable. R efer to figure 3-1.
Figure 3-1. Voltage Measurement Accuracy Test
2. In the Wav e form Selection menu delete channel 2. If channel 1 is not inserted, insert channel 1. Set
the following parameters in the order given.
3. With the power supply disconnected from the channel i nput, set the Cha n ne l me nu to the V/Div
range and offset values shown in the first line of the table.
4. On the oscilloscope, select RUN - REPETITIVE and wait for approximately five s econds, then select
STOP. Read the voltage displaye d under the chan nel label on the left of the display. Enter this
value on the performance tes t re cord in the "Zero Input" column.
5. Set the power supply to the first supply value listed in the table. Connect the power supply to the
channel input as s hown in figure 3 - 1 .
6. On the oscilloscope, select RUN - REPETITIVE and wait for approximately five seconds, the n s elect
STOP. Read the voltage displaye d under the chan nel label on the left of the display. Enter this
value on the pe rformance te s t re cord in the "Measured" column.
7. To obtain the test res ults , s u btract the Ze ro Input voltage from the Me asured voltage listed in the
performance test record. For example : (M easured) - (Zer o Input) = (A ctual). When calculating the
results, observ e the plus or minus va lue of the voltage measurements. Record the results in the pe rformance test record in the "Actual" column.
-7.0 V
-1.75 V
-700.0 mV
-70.0 mV
70.0 mV
700.0 mV
1.75 V
7.0 V
-14.0 V
-3.50 V
-1.40 V
-140.0 mV
140.0 mV
1.40 V
3.50 V
14.0 V
-13.7 V
-3.43 V
-1.37 V
-137.0 mV
143.0 mV
1.43 V
3.57 V
14.3 V
-14.3 V
-3.57 V
-1.43 V
-143.0 mV
137.0 mV
1.37 V
3.43 V
13.7 V
8. Repeat steps 3 through 8 for the second line of the table, then for the rest of the lines of the table for
channel 1.
9. In the Wav e form Selection menu, select Input channel 2. Delete channel 1 and insert channel 2. Repeat steps 2 through 8 f or chann e l 2, replacing channel 1 with cha nn e l 2 where applicable.
3-8
HP 16532A - Performance Tests
3-10. OFFSET ACCURACY
This test verifies the offset accuracy.
Specification:
± (1.0% of chann e l offset + 2.0 % of full scale)
Equipment Required:
The f ollowing equipment is required for the test. Procedures are base d on the model or part numbers recommended.
Recommended
Equipment RequiredCritical Specification
Model/ Part Number
DC Power Supply
Digital Multime te r
Cable
Adapter
Procedure:
Zero-Input Offset
1. Disconnect all cables and probes from the oscilloscope inputs. In the Waveform Sele ction menu delete channel 2. If channel 1 is not inserted, insert channel 1. Then set up the oscilloscope module
according to the following parameters in the order given:
MenuSelectionSetting
Channel
− 35.000 to + 35.000 Vdc, ± 1 mV resolution
Better than 0.1% accuracy
50 Ω BNC (m to m) 48-i nch
50 Ω BNC (f) to Dual Banana Plug
Input
Probe
v/Div
Offset
Coupling
s/Div
1
1:1
4 V
0 V
1 MΩ / DC
500 ns
HP 6114A
HP 3458A
HP 10503A
HP 1251-2277
Trigger
Display
2. With the DC power s u pply disconnected from the channe l in put, ma k e s u re the markers are near
the center of the display.
Mode
Mode
Average #
Grid
Markers
Immediate
Average
32
On
On
3-9
HP 16532A - Performance Tests
3. Select RUN - REPETITIVE. Wait approximately 15 seconds (averaging complete), then select
ST OP. The display should read 0.00 V ± 320.0 mV as read from the markers voltage field. Record
the reading in the performance test record.
4. In the Channel menu, change the vertical sens itivity to 1 V/Div. Se l ect RU N - REPETITIVE and wait
approximately 15 s econds (averaging complete), then select STOP. The display should read 0.0 0 V
± 80.0 mV. Re cord the reading in the performance test record.
5. In the Channel menu, change the vertical sens itivity to 100 mV/Div. Select RUN - REPETITIVE and
wait approximately 15 seconds (averaging complete), the n select STO P. The displa y s h ould rea d
0.00 V ± 8.0 mV. Record the reading in the performance test record.
6. In the Channel menu, change the vertical sens itivity to 10 mV/Div. S elect RUN - REPETITIVE and
wait approximately 15 seconds (averaging complete), the n select STO P. The displa y s h ould rea d
0.00 V ± 800.0 µV . Record the reading in the performance test record.
DC Input Offset
Set the C ha nnel
Coupling
field to 1MΩ / DC or damage to the equipment will
result.
7. Use the BNC-to-banana adapter to connect the BNC cable between the power supply and channel
1 input. Monitor the power supply using a voltmete r.
9. In the Channel menu se t the V/Div range and offset per the first line of the table. Set the power
supply per the first line of the table.
10. On the oscilloscope, select RU N - REPETITIVE and wait approximately 15 s econds (averaging
complete), then ST OP.
− 35.00 V
− 10.00 V
− 2.00 V
+ 2.00 V
+ 10.00 V
+ 35.00 V
− 35.00 V
− 10.00 V
− 2.00 V
+ 2.00 V
+ 10.00 V
+ 35.00 V
− 35.4 V
− 10.1 V
− 2.02 V
+ 1.98 V
+ 9.90 V
+ 34.6 V
− 34.6 V
− 9.90 V
− 1.98 V
+ 2.02 V
+ 10.1 V
+ 35.4 V
11. Read the voltage f rom the ma rke rs voltage fiel d. It sh ould be within the limits giv e n in the table. Record the reading in the performance test record.
12. Repeat steps 7 through 10 for the rema ining lines of the ta ble us ing the V/Div range, offset, and supply voltages given in the table.
13. In the Channel menu sele ct channel 2. In the Waveform Selection menu delete channel 1 and insert
channel 2.
14. Repea t steps 1 through 12 for channe l 2, replacing channel 1 with channe l 2 where applicable.
3-10
HP 16532A - Performance Tests
3-11. BANDWIDTH
This tes t checks the bandwidth of the oscilloscope module.
Specification:
Bandwidth (dc coupled) dc to 250 MHz
Equipment Required:
The f ollowing equipment is required for this test. Procedures are bas ed on the model or part number recommended.
Recommended
Equipment RequiredCritical Specification
Model/ Part Number
Signal Generator
Powe r Meter/Sensor
Power Splitter
Cable
Adapter
Procedure:
1. With the N cable, connect the signal ge n e rator to the power splitter input. Conne ct the power
sens or to one output of the power splitter.
2. U s i ng a n N- to-B N C adapter, connect the other power splitter output to the Chann e l 1 i n put of the
oscilloscope module.
3. In the Waveform Selection menu delete channel 2. If channel 1 is not inserted, insert channel 1.
Set the following parameters.
MenuSelectionSetting
1 - 250 MHz at approx 170 mVrms
1 - 250 MHz ± 3 % accu racy
Out put s differ by < 0.15 dB
Ty pe N (m to m) 2 4-inch
50 Ω Type N (m) to BN C (m)
HP 8656B
HP 436/8482A
HP 11667B
HP 11500B
HP 1250-0082
Channel
Trigger
Display
Input
Probe
v/Div
Offset
Coupling
s/Div
Mode
Level
Mode
Average #
Grid
Markers
1
1:1
80 mV
0 V
50 Ω / DC
200 ns
Edge
0 V
Average
32
On
Off
3-11
HP 16532A - Performance Tests
4. Set the signal generator for 1MHz at − 2.4 dBm. On the oscilloscope, select RU N - REPETITIVE. The
signal on the scree n s h ould be two cycles at three divisi ons a m plitude.
5. After the measurement settles (averaging complete, about 15 seconds), select STOP. In the
Auto-Me asure menu note the V
reading. V
p-p
= __________ mV.
1MHz
6. S e t the power me ter C a l Factor % to the 1MHz v a lu e from the calibration chart on the power splitter.
Then press dB[REF] to set a 0 dB reference.
7. Change the signal generator to 250 MHz. Set power meter Cal Factor % to the 250 MHz value from
the chart.
8. A djust the s i gnal gen e ra tor amplitude for a power rea ding as close a s possi ble to 0. 0 dB[REL].
Reading = __________ dB.
9. Se t the oscilloscope s/Div for 2 ns/Div and select RUN- REPETITIVE.
10. After the measurement settles (averaging complete), select STOP. In the Auto-Measure menu note
the V
reading. V
p-p
= ________mV.
250MHz
11. Calculate the response us i ng the formula:
V
250
response (dB
) = 20 log
10
Mhz
1
MHz
= 20
V
(_____) = ______
log
10
dB
12. Correct the result f r om ste p 11 with any differen ces in the power m e te r f r om ste p 8. O bserve signs.
For example:
R esult from step 11 = − 2.3 dB
Pow er meter reading = − 0.2 dB[REL]
then true re s ponse = (− 2.3) − (− 0.2) − 2.1dB
(__________) − (__________) = ____________ dB
13. The res ult f rom step 12 should be ≤ − 3.0 dB. Record the result in the Performance Te s t Record.
14. In the Channel menu select channel 2. In the Waveform Selection menu delete channel 1 and
insert channel 2.
15. Repea t steps 2 through 14 for channe l 2, replacing channel 1 with channe l 2 where applicable.
Note
F a ilure of the bandwidth test can be caused by a fa ulty at tenua tor or main
assembly.
3-12
HP 16532A - Performance Tests
3-12. TIME MEASUREMENT ACCURACY
This te s t us e s a precise freque ncy source to check the accuracy of time measure me nt functions.
Specification:
−
± [(0.005% x ∆t) + (2 x 10
Equipment Required:
The f ollowing equipment is required for this test. Procedures are bas ed on the model or part number recommended.
Equipment RequiredCritical Specification
6
x delay se tting) + 150 ps]
Recommended
Model/ Part Number
Signal Generator
Cable
Adapter
200 MHz, timebase accuracy 0.25 ppm
50 Ω BNC (m to m) 48-inch
50 Ω Type N (m) to BN C (f)
HP 8656B Opt. 001
HP 10503A
HP 1250-0780
Procedure:
1. Set the signal generator to 181.81818 MHz (5.5 ns period) and approximately 600 mV rms.
2. Use the N-to-BNC adapter to connect the cable to the signal generator. Connect the free end of the
BNC cable to the channel 1 input.
3. In the Wav e form Selection menu delete channel 2. If channel 1 is not inserted, insert channel 1. Set
the following parameters in the order given:
MenuSelectionSetting
Channel
Input
Probe
v/Div
Offset
Coupling
s/Div
1
1:1
400 mV
0.0 V
50 Ω / DC
2.00 ns
Trigger
Display
Mode
Source
Level
Slope
Mode
Grid
Edge
Chan 1
0.0 V
Positive
Normal
On
3-13
HP 16532A - Performance Tests
4. Se le ct the Markers Auto menu, and set the following parameters:
MenuSelectionSetting
Markers
Auto
5. Se le ct DONE. On the oscilloscope module select RUN - REPETITIVE. If the waveform is clipping,
reduce the signal ge n e ra tor output voltage level until the waveform no longer clips. All ow the oscilloscope module to run approximately two minutes, the n s elect STOP.
6. In the statistics field, check to see tha t the MEAN X-O field is approximately 5.500 ns. Check that
both the MIN X -O and the MAX X-O are within 150 ps of the MEAN X-O. Record the results in the
performance test record.
7. Se le ct the Markers Auto menu, and set the following parameters:
MenuSelectionSetting
X →
O→
Statistics
Set on chan 1
at Level 50%
Slope Positive
Occur 1
Set on chan 1
at Level 50%
Slope Positive
Occur 2
On
Markers
Auto
8. Sele ct DONE. In the Display menu, set MODE AVERAGE # 8 and DELAY 9 9 .0 0 ns. Select RUN-REPE TITIVE and allow the oscilloscope module to run approximately two minutes. Sele ct STOP.
9. In the statistics field, check to see tha t the MEAN X-O field is approximately 99.000 ns. Check that
both the MIN X -O and the MAX X-O are within 155 ps of the MEAN X-O. Record the results in the
performance test record.
X →
O→
Statistics
Manual
Set on chan 1
at Level 50%
Slope Positive
Occur 1
On
Note
Failure of the time me a surem ent accuracy test can be caused by a defective
main assem bly.
3-14
HP 16532A - Performance Tests
3-13. TRIGGER SENSITIVITY
Th is te s t checks chan ne l triggers for sensitivity at rate d bandwidth.
Specification:
dc to 50 MHz : 0.063 x full scale (0.2 5 divis i on)
50 to 250 MHz : 0.125 x full scale (0. 5 division)
Equipment Required:
The f ollowing equipment is required for this test. Procedures are bas ed on the model or part number recommended.
Recommended
Equipment RequiredCritical Specification
Model/ Part Number
Signal Generator
Cable
Adapter
50 and 250 MHz, 30-80 mV
50 Ω BNC 48-inch
50 Ω Type N (m) to BN C (f)
rms
output
HP 8656B Opt. 001
HP 10503B
HP 1250-0780
Procedure:
1. In the Wav e form Selection menu delete channel 2. If channel 1 is not inserted, insert channel 1. On
the oscilloscope module set the following parameters in the order given:
MenuSelectionSetting
Channel
Trigger
Input
Probe
v/Div
Offset
Coupling
s/Div
Mode
Source
Level
1
1:1
400 mV
0 V
50 Ω / DC
20 ns
Edge
Chan 1
0 V
Display
Mode
Average #
Grid
Markers
Average
8
On
Off
2. With an N-to-BN C adapter a n d BNC cable, connect the s i gna l ge n erator to channel 1 input.
3-15
HP 16532A - Performance Tests
3. Se t the signal generator for a 50 MHz a nd 35 mV rms signal. On the oscilloscope module select
RUN - REPETITIVE.
4. In the Auto-Measure menu read V
close to and not more than 100 mV
. Adjust the signal generator output level so that the signal is
p_p
.
p_p
5. In the Trigger menu a djust the trigger lev el for a sta ble displa y. The test pass es if the trigger is stable. Record whether the trigger is stable or is not stable.
6. On the oscilloscope module select STOP. Set the signal generator frequency to 250 MHz and
70 mV rms signal level.
7. In the Channel menu change s/Div to 5 ns/Div and select RUN.
8. In the Auto-Measure menu read V
close to and not more than 200 mV
. Adjust the signal generator output level so that the signal is
p_p
.
p_p
9. In the Trigger menu a djust the trigger lev el for a sta ble displa y. The test pass es if the trigger is stable. Record whether the trigger is stable or is not stable in the performance te s t record.
10. On the oscilloscope module select STOP. In the Channel menu select channel 2. In the Trigger
menu select Source channel 2. In the Waveform Selection menu delete channel 1 and insert
channel 2.
11. Repea t steps 1 through 9 f or chann el 2, replacing channe l 1 with cha n nel 2 where applicable.
Note
Failure of the trigger sensitivity test can be caused by a defective m ain
assembly.
3-16
HP 16532A - Performance Tests
Hewlett-Packard
Table 3-1. Performance Test Record
Tested by ______________________________
Model 16532A
Oscilloscope Module
Serial No.:
____________________
R ecommended Performance
V e rif ication Inte rv a l:
4-6. Recommended Test Equipment .........................................................................................4-2
4-7 . I ns trument W a rmup.............................................................................................................4-2
4-8. Ca libration............................................................................................................................4-2
4-9 . Setting the PROTE C T/UNPROTECT S witch to UNPROTECT...........................................4-3
4-10. Equipment R e quired for Calibration...................................................................................4-4
4-1 1. Loading the Def ault Calibration Fa ctors............................................................................4-4
4-12. Self Cal Menu Calibrations.................................................................................................4-5
4-1 3. Setting the P ROTECT/UNPROTECT Switch to PRO TECT................................................4-8
4-14. Sealing the Mainframe........................................................................................................4-8
HP 16532A - Calibration
SECTION IV
Calibration
4-1. Introduction
This section provides information on calibrating
the HP 16532A 1 GSa/s Oscilloscope module.
Information is included about when to calibrate the
module, the module warm up interval re quired
prior to calibration, and how to do the actual
calibration of the module. Also included are safe ty
requirements to observe when working on the
equipment, a list of recommended test equipment,
and equipment setups for the different calibration
procedures. Although the module has no
hardware adjustments, it does contain a
calibration PROTECT/UNP ROTE C T switch that
you use before and afte r calibration. Actual
calibration of the module is performed in software.
4-2. Safety Requirements
Rea d the safety summary at the front of this
manual before any repla cement, maintenance, or
repair is performed.
•The oscilloscope software changes revision
number and asterisks (*) are on the calibration menu.
•Ambient temperature changes more tha n
10 °C.
If you add or delete a card(s) from a calibrated
multicard oscilloscope module, you must perform
the T ime Null calibration.
4-4. M aintaining System Integrity
Calibration factors depend on the mainframe,
module, and module configuration all staying
together. If oscilloscope modules are
interchanged between ma inf ra me s , or the
oscilloscope module slot configuration is changed,
calibration must be repea te d. In a n environment in
which the possibility of sharing oscilloscope
modu les exist s, He wlett -Pa ckard recomme nds
taking the following precautions in order to
maintain s yste m inte grity:
Specific warnings, cautions, a nd instructions are
placed wherever applicable throughout the
manual. These must be observed during all
pha ses of operation , serv ice, and repair of th e
module. Failure to comply with them violates
safety standards of design, manuf acture, and
intended use of this module. He wl e tt-Packard
assumes no liability for the failure of the customer
to comply with these sa fe ty requireme nts .
4-3. Calibration Interval
To mainta in proper calibration, perform calibration
at approximately six-month interv a l s, or every 1000
hours, when the in s trume nt is be i ng used under
normal operating conditions. Immediate
calibration is required if one of the following
occurs:
•Oscilloscope module is installed, repaired, or
replaced, or if the card slot configuration is
changed.
With the s yste m turne d off, place the
PROTE C T/UNPROTE C T switch (all switches in a
single or a chained, multiple oscilloscope module
configuration) in the UNPROTE C T position.
Boot th e syste m and perform ca l ibration f or each
module.
Turn off the s ys te m, pla ce the
PROTE C T/UNPROTE C T switch (all switches in a
single or a chained, multiple oscilloscope module
configuration) in the PROTE C T position, then s eal
the mainfra me .
4-5. Calibration Protection Switch
Each HP 16532A board stores the calibration
factors for that board in non-volatile RAM on the
board itself. The HP 16532A board contains a
calibration protection (PROTE C T/UNPROTE C T)
switch. W ith the s witch in the PROTECT position,
calibrat ion va l ues ca nnot be changed.
4-1
HP 16532A - Calibration
To run the s cope calibration, the switch must be i n
the UNPROTECT position. When you have more
than one HP 16532A board in a mainframe, this
mus t be done for each one of the boards. After
calibration is complete, all the switches must be
set to the P ROTECT position to save the
calibration values. A ls o, all the modules or filler
panels must be re ins talled in the mainframe , the n a
seal should be placed on the equipment such that
the seal touches both the top-most module and
the mainfra me . This is done to assure that
calibration integrity is maintai ne d.
4-6. Recomme nded Test Equipment
Th e only tes t equipment required for calibration
are cables and adapters. These are listed in
paragraph 4-10 and are called out in the applicable
calibrat ion proced u r e.
4-7. Instrument Warmup
Calibrate the oscilloscope module at its
environmental a mbient temper ature , af te r a
30- minute w a rmup period of the
HP 16500A/16501A mainframe with the module
installed.
4-8. Calibration
This s ection provides softwa re cali bration
procedures for the HP 16532A oscillo scope
module. The re a re no hardware adjustments on
the oscilloscope module. The calibration is
performed without access to the inte rior of the
instrument.
Wh e n ordered with a system, oscilloscope
modules are calibrated at Hewlett-Packard as
single units (not chained together). If you ne e d to
use the modules as one unit (chained together),
perform the Time Null C a l ibration in section 4-1 2 .
The calibration procedure sets the oscilloscope
calibration factors and stores them in non-volatile
RA M on the board. The procedures use signals
generated in the oscilloscope module itself to
calibrate cha nn el sensitivity, off s et, an d trigger
parameters. The calibration factors set up the
module each time the instrument is turned on.
Th e cal ibration procedures in this section should
be followed in their entirety an d in the se quence
listed in table 4-1. Th ough in this section the
default ca li brations are loaded before calibration,
calibration can be done without loading them.
However, if they are loaded, they should be loaded
before an actual calibration is done.
Wh e n calibrating the module, it must be instal le d in
the mainframe, and the mainframe covers and filler
pan els must be in pl ace. The module must be
warmed up (refe r to " I ns trume nt Warmup" given
earlie r in this s e ction).
Calibration procedures require the use of cables
and adapte rs only. N on-s ervice personnel can
perform the calibrat i on, however, to do th e
calibration, it is necessary to unprotect the current
calibration values. T his ma y not be allowed in
some circumstances − check with your
Cal ibra tion La borat ory or Se rv ice D e pa rtme nt
before you attempt calibration. To perform
calibration, follow the "Se lf C al Menu Ca libration"
procedures give n l a te r in this s e ction.
Table 4-1. Calibration Sequence
SequenceCalibrationParagraph
1
2
3
4
5
6
7
8
4-2
Se t the PROTECT/UNP ROTECT Switch to UNPROTECT
Default (Not required as part of the calibration procedures)
Self Cal Menu
V ertical Ca l i bration (all cha nn e l s )
Delay Calibration− Cha nnel 1
Delay Calibration− Cha nnel 2
Time Null C alibration (all channels)
Logic Trigger - Channel 1
External Trigger Null Ca libration
Se t the PROTECT/UNP ROTECT Switch to PROTECT
4-9
4-11
4-12
4-12
4-12
4-12
4-12
4-12
4-13
HP 16532A - Calibration
4-9. Setting the PROTECT/UNPROTECT Switch to UNPROTECT
The effects of ELECTROSTATIC D ISCHARGE can damage electronic components. U se grounded wrist straps and mats when you are performing any kind of
service on this module.
The oscilloscope board contains a calibration PR O TECT/UNPROTECT switch. T his s witch must be se t
to UNPROTECT before calibration can be done. Set the switch to UNPROTE CT as follows:
1. Remove power from the instrument. P ull h a lf w a y out all of the modules located above the
oscilloscope and remove the filler panels and cards located above the oscilloscope. See figure 4-1
for the removal sequence.
Figure 4-1. Endplate Ov erlap - Top Se quence
2. Remove the oscilloscope module and se t the PROTECT/U NPROT ECT switch to the UNP ROTECT
position. See Figure 4-2 to locate this switch.
Figure 4-2. Location of the PROTECT/UNPRO TECT S w itch
3. Repeat step 2 for every oscilloscope module if this is a multimodule calibration.
4. Reinstall the modules and filler panels in reve rse order of steps 1 and 2.
4-3
HP 16532A - Calibration
4-10. Equipment Required for Calibration
The equipment listed below is required for calibration:
Cable (2)50Ω BNC, 9-inch (equal length)HP 10502A
Cable50Ω BNC - SMBHP 16532-61601
Adapter50Ω BNC te e (m)(f)(f)HP 1250-0781
Adapter50Ω BNC (m)(m)HP 1250-1236
4-11. Loading the Default Calibration Factors
Once the default calibration factors are loaded, all calibrations must be done.
Th is includes all of the calibrations in the Self Ca l menu. The calibration must be
performed in the exact sequence listed in table 4-1.
Note
T h e calibr ation P ROT ECT / UNPROTECT switch on th e os cilloscope boar d mu st
be set to UNPROT ECT.
Load the def ault calibration fa ctors as f ollows:
1. Touch the menu field (top row, second from the left), then select Calibration from the pop-up menu.
2. Touch the Mode field, then select Service Cal from th e pop-up me n u .
3. Touch the Proced u re field, then select Default Values from th e pop-up me n u .
Note
A ft er you touch the Sta rt field, you can abort the calibration procedure either by
touching the Cancel field, if it is av a ilable in the menu, or by touching either the
Mode or Procedure fields if the continue field is still displayed on the s creen.
4. Touch the Start field and follow the instructions on the display. The display should now look similar
to the display shown in figure 4-3.
4-4
Figure 4-3. Def a u lt Calibration Display
HP 16532A - Calibration
4-12. Self Cal Menu Calibrations
Note
A ft er you touch the Sta rt field, you can abort the calibration procedure either by
touching the Cancel field, if it is av a ilable in the menu, or by touching either the
Mode or Procedure fields if the continue field is still displayed on the s creen.
Messages will be displayed as each calibration routine is completed to indicate calibration has pass ed or
faile d. The resulting calibration factors are automatically stored to nonvolatile RAM at the conclusion of
each calibration routine.
Th e Self Cal me nu l e ts you calibra te v e rtica l s e ns itiv ity (Vert Cal) f or channe ls 1 a n d 2 indiv idua lly or both
channels on a board simultane ously if it is a s ta n d al one s cope. A ls o, the Self Cal me nu l e ts you calibrate delay (De la y) for channel 1 a nd 2 separately, then Time Null for each channel separa te ly (except
channel 1 of the ma ster board), and Ext Trig Null for the externa l trigger (E CL).
Calibrate Vert Cal of the Self Cal menu as follows:
1. Connect two BNC 50-Ω, 9-inch cables to the BNC tee adapter.
Note
When you touch S ta rt, the instrument will prompt you to connect the cables to
the appropriat e loca tions on the r ear pan e l of the module .
2. Touch the Mode field, then select Self Cal from t h e pop-up me n u .
3. Touch the Proced u re field, then select Vert Cal from t he pop-up menu.
4. Touch the Channel field, t h en select a channel ch oi ce from the pop-up menu.
5. Touch the Start field and follow the instructions on the display.
6. After completion of vertical calibration re move the cables fr om the re ar panel of the oscilloscope.
Calibrate Delay of the Self Cal menu as follows:
1. Obtain a BNC 50-Ω, 9-inch cable.
Note
When you touch S ta rt, the instrument will prompt you to connect the cable to the
appr opr iate location on the rea r panel of t h e module.
2. Touch the Proced u re field, then select Delay from the pop-up menu.
4-5
HP 16532A - Calibration
3. Touch the Channel fie ld, then select S1 from the pop-up men u (whe re S is the slot letter where the
oscilloscope module is installed in the mainframe).
4. Touch the Start field and follow the instructions on the display.
5. After completion of channel 1 delay calibration, remove the cable from the rear panel of the
oscilloscope.
6. Repeat ste ps 3 through 5 for chan nel S2.
7. A f te r completing all of the channel dela y calibrations, remove the cable from the rear panel of the
oscilloscope.
Calibrate the Time Null of the Self Cal menu as follows:
1. Connect two BNC 50-Ω, 9-inch cables to the BNC tee adapter.
Note
When you touch S ta rt, the instrument will prompt you to connect the cables to
the appropriat e loca tions on the r ear pan e l of the module .
2. Touch the Proced u re field, then select Time Null from t h e pop-up me n u .
3. Touch the Channel fie ld, then select S2 from the pop-up men u (whe re S is the slot letter where the
oscilloscope module is installed in the mainframe).
4. Touch the Start field and follow the instructions on the display.
5. Repeat ste ps 3 through 4 for each channel, replacing S2 with the appropriate channe l number.
6. A t the conclusion of the time null calibration, remove the cables f rom the rear of the module.
Calibrate the Logic Trigger of the Self Cal menu as follows:
1. Obtain one BNC 50 Ω 9-inch cable.
Note
When you touch S ta rt, the instrument will prompt you to connect the cables to
the appropriat e loca tions on the r ear pan e l of the module .
2. Touch the Proced u re field, then select Logic Trigger f r om t h e pop-up me n u .
3. Touch the Start field, then f ollow the i ns tructions on the displa y.
4. A t the conclusion of the Logic Trigger calibration, remove the cable from the rear of the module.
4-6
HP 16532A - Calibration
Calibrate the Ext Trig Null of the Self Cal menu as follows:
1. Connect the cables, BNC adapter, and BNC tee adapter together as shown in figure 4-4.
Note
When you touch S ta rt, the instrument will prompt you to connect the cables to
the appropriat e loca tions on the r ear pan e l of the module .
Figure 4-4. Ext Trig Null Calibration Connections
2. Touch the Proced u re field, then select Ext Trig Null from the pop-up menu.
3. Touch the Start field and follow the instructions on the display.
4. A t the conclusion of the ext trig null calibration, remove the cables f rom the rear of the module.
Messages will be displayed as each calibration routine is completed to indicate calibration has pass ed or
faile d. The resulting calibration factors are automatically stored to nonvolatile RAM at the conclusion of
each calibration routine.
This is the conclusion of the calibration procedures. Th e display sh ould now look similar figure 4-5 .
4-7
HP 16532A - Calibration
Figure 4-5. End of Calibration Display
4-13. Setting the PROTECT/UNPROTECT Switch to PROTECT
The effects of ELECTROSTATIC D ISCHARGE can damage electronic components. U se grounded wrist straps and mats when you are performing any kind of
service on this module.
Th e PROTECT/UNP ROTECT switch must be s et to PROTECT after cali bration is finis h e d. Set the switch
to PROTECT as follows:
1. Remove power from the instrument. Pull the modules l ocated above the oscilloscope halfway out,
then remove the filler panels and cards located above the oscilloscope. See figure 4-6 for the
removal sequence.
Figure 4-6. Endplate Ov erlap - Top Se quence
2. Remove the oscilloscope module and se t the PROTECT/U NPROT ECT switch to the PROTE CT
position. See Figure 4-2 to locate this switch.
3. Repeat step 2 for each module calibrated.
4. Reinstall the modules and filler panels in reve rse order of steps 1 and 2.
4-14. Sealing the Mainframe
Afte r cali bration has be en completed, the mainfra me s h ould be se aled to protect the integrity of the
system. Place a seal on the equipment such that the seal touches both the top-most module (or filler
panel) an d the mainf ra me .
4-8
TABLE OF CONTENTS
Replaceable Parts
5-1 . I ntroduction .......................................................................................................................... 5-1
5-2. A bbreviations ....................................................................................................................... 5-1
5-3. Replaceable Parts List ......................................................................................................... 5-1
5-4. Ordering Information ........................................................................................................... 5-1
5-5. E xchange Assemblies ......................................................................................................... 5-1
5-6. Direct Mail Order System .................................................................................................... 5-2
HP 16532A - Replaceable Parts
SECTION V
Replaceable Parts
5-1. Introduction
Th e service policy for this instrument is re pla ce ment of defective asse mblies. This service manual
contains information for finding a defective
assembly.
This s ection contains parts and ordering
information for the HP 16532A Oscilloscope
Module. Ta ble 5 - 1 lists the reference designator
and abbrevia tions us ed throughout this manua l.
Ta ble 5 - 2 lists all replaceable parts by refere nce
designator.
5-2. Abbreviations
Table 5-1 lists abbreviations used throughout the
manual. In some cases two forms of the
abbreviations a re used, one in all capital le tters ,
the other partially or not capitalize d. T his wa s
done because the a bbreviations in t h e parts list ar e
always all capitals. However, in other parts of the
manual other a bbrevi ation forms a re use d with
both lower and uppercase letters.
5-3. Replaceable Parts List
Table 5-2 lists replaceable parts and is organized
as follows:
Th e information given f or ea ch part consists of the
following:
•Complete refere nce des i gnation.
•Hewlett-Pa ckard part number.
•T otal qua ntity.
•Des cr i pt i on of part.
•Check digit.
Th e total quantity f or each part is only given once
at the first appeara nce of the part number in the list.
5-4. Ordering Information
T o order a part li sted in t h e repla ceable parts ta ble,
quote the Hewlett-Pa ckard part number, check
digit, indicate the qua ntity re quired, and address
the order to the nearest Hewlett-Packard office.
T o order a part th at is not l i sted in t h e repla ceable
parts table, include the ins trume nt model number,
instrument seria l number, the des cription and
function of the part, and number of parts required.
Address the order to the nearest Hewlett-Packard
office.
•Exchange as s emblies in alphanume rical
order by reference des ignation.
•Electrical assemblie s in a l phanume rical order
by reference designation.
•Chassis-mounted parts in alphanumerical
order by reference des ignation.
5-5. Exchange Assemblies
Exchange assemblies are available when a
repairable a ssembly is returned to
Hewlett-Packard. These assemblies have been set
up on the "Exchange Assembly" program. This
allows the customer to exchange the f aulty
ass e mbly with one tha t has be e n re pa ire d,
calibrated, and perf ormance verified by the
factory. The cost is significantly l ess than that of a
new a s s e mbly.
5-1
HP 16532A - Replaceable Parts
Exchange assemblies are listed in a separate
section in the replaceable parts table. They have a
part number in the form XXXXX-695XX (where the
new parts would be XXXXX-665X X). Before
ordering an "exchange assembly," check with your
local parts or re pair organi zation f or pr oce du r es.
5-6. Direct Mail Order System
Within the USA, He w le tt-Packard can supply parts
through direct mail order. T he advantage s are as
follows:
•Direct ordering and shipment from
Hewlett-Packard Parts Ce nte r in M ountai n
Vi e w, California.
•No maximum or minimum on any mail order
(there is a minimum order for parts ordered
through local Hew le tt-Packard offices when
orders require billing and invoicing).
•Pre pa id trans portation (there is a small
handling charge for each order).
•No invoices - to provide these advantages,
che ck or m oney order mus t accompan y each
order .
Mail order forms an d specific ordering information
are a v a i la ble through your local Hewlett-Packard
offices.
5-2
HP 16532A - Replaceable Parts
Ta ble 5- 1 . Reference Designator and Abbreviations
REFERENCE DESI GNATOR
A
B
BT
C
CR
DL
DS
E
A
A/D
AC
ADJ
AL
AMPL
ANLG
ANSI
ASSY
ASTIG
ASYNCHRO
ATTEN
AWG
BAL
BCD
BD
BFR
BIN
BRDG
BSHG
BW
C
CAL
CC
CCW
CER
CFM
CH
CHAM
CHAN
CHAR
CM
CMOS
CMR
CNDCT
CNTR
CON
CONT
CRT
CW
D
D/A
DAC
DARL
DAT
DBL
DBM
DC
DCDR
DEG
DEMUX
DET
DIA
DIP
DIV
DMA
DPDT
DRC
DRVR
=assembly
= fan;motor
= battery
= cap acitor
= diode;diode thyristor;
varactor
= delay line
= annunciator;lamp;LED
= misc. electrical part
= amperes
= analog-to-digital
= alternating current
= adjust(ment)
= aluminu m
= amplifier
= analog
= American National
Standards Institute
=assembly
= a stigm atism
= asynchronous
= attenuator
= American wire gauge
= balance
= binary-code decimal
= board
= buffer
= binary
= bridge
= bushing
=bandwidth
= ceramic;cermet
(resistor)
= calibrate;calibration
= carbon composition
= counterclo ckwise
= ceramic
= cubic feet/m inute
=choke
= chamfered
= channel
= character
= centimeter
= complementary metal oxide-semiconductor
= common mode rejec tion
= conductor
= counter
= connector
= contact
= cathode-ray tube
= clockwise
= diameter
= digital-to-analog
= digital-to-analog
converter
= darlington
= data
= double
= decibel referenced
to 1mW
= direct current
= decoder
= degree
= demultiplexer
= detector
= diameter
= dual in-line p ackage
= division
= direct memory access
= double-p ole,
double-throw
= DAC refresh controller
= driver
F
FL
H
J
L
MP
P
DWL
ECL
ELAS
EXT
F
FC
FD
FEM
FF
FL
FM
FR
FT
FW
FXD
GEN
GND
GP
GRAT
GRV
H
HD
HDND
HG
HGT
HLCL
HORIZ
HP
HP-IB
HR
HV
HZ
I/O
IC
ID
IN
INCL
INCAND
INP
INTEN
INTL
INV
JFET
JKT
K
L
LB
LCH
LCL
LED
LG
LI
LK
LKWR
LS
LV
M
MACH
MAX
=fuse
= filter
= hardware
= electrical connector
(stationary portion);jack
= c oil;inducto r
= misc. mechanical part
= electrical connector
(moveable portion);plug
ABBREVIATIONS
= dowel
= emitter coup l e d logic
= elastomeric
= external
= farads;metal film
(resistor)
= carbon film/
compo sition
= feed
= female
= flip-flop
= flat
= foam;from
= front
= gain bandwidth
product
= full wave
= fixed
= generator
= ground(ed)
= general pu rpose
= graticule
=groove
= henries;high
= hardware
= hardened
= mercury
= height
= helical
= horizontal
= Hewlett-Packard
= Hewlett-Packard
Interface Bus
= hour(s)
= high voltage
= Hertz
= input/output
= integrated circuit
= inside diameter
=inch
= in clu d e(s)
= i n candescent
= input
= intensity
= internal
= inverter
= j unction field effect transistor
= jacket
= kilo(103)
=low
= pound
= latch
= lo cal
= light-emitting
diode
=long
= lithium
= lock
= lockwasher
= low power Schottky
= low voltage
= mega(106);me gohms;
meter(distance)
= machine
= maximum
Q
R
RT
S
T
TB
TP
MFR
MICPROC
MINTR
MISC
MLD
MM
MO
MTG
MTLC
MUX
MW
N
NC
NMOS
NPN
NPRN
NRFR
NSR
NUM
OBD
OCTL
OD
OP AMP
OSC
P
P/O
PC
PCB
PD
PF
PI
PL
PLA
PLST
PNP
POLYE
POS
POT
POZI
PP
PPM
PRCN
PREAMP
PRGMBL
PRL
PROG
PSTN
PT
PW
PWR
R-S
RAM
RECT
RET
RF
RGLTR
RGTR
RK
RMS
= transistor;SCR;
triode thyristor
= resistor
= thermistor
= switch;jumper
= transformer
= terminal board
= test poi nt
= manufacturer
= microprocessor
= miniature
= m i scellaneou s
=molded
= m illimeter
= metal oxide
= mounting
= metallic
= multiplexer
= milliwatt
= nano(10-9)
= no connection
= n-chann el metal oxide-semiconductor
= negative-positive negative
= neoprene
= not recommend ed for
field replacement
= not separately
replaceable
= numeric
= order by description
= octal
= outside diameter
= operational amplifier
= oscillator
= p lastic
= part of
= printed circuit
= printed circuit board
= power dissipation
= picofarads
=plug in
= plate(d)
= programmabl e logic
array
= p lastic
= positive-negative positive
= polyester
= positive;position
= potentiometer
= pozidrive
= peak-to-peak
= parts per million
= precision
= preamplifier
= programmable
= parallel
= programmable
= position
= point
= potted wirewound
= power
= reset-set
= random-access
memory
= rectifier
= retainer
= radio frequency
= regulator
= register
= rack
= root-mean-square
U
V
VR
W
X
Y
RND
ROM
RPG
RX
S
SCR
SEC
SEG
SEL
SGL
SHF
SI
SIP
SKT
SL
SLDR
SLT
SOLD
SPCL
SQ
SREG
SRQ
STAT
STD
SYNCHRO
TA
TBAX
TC
TD
THD
THK
THRU
TP
TPG
TPL
TRANS
TRIG
TRMR
TRN
TTL
TX
U
UL
UNREG
VA
VAC
VAR
VCO
VDC
VERT
VF
VS
W
W/
W/O
WW
XSTR
ZNR
oC
oF
oK
= integrated circuit;
microcircuit
= electron tub e; glow
lamp
= voltage regulator;
breakdown diode
= cable
=socket
= crystal unit(piezo electric or quartz)
6-9. Oscilloscope Module R e moval and R e placement ............................................................ 6-18
6-10. Trigger Cable Removal and Replacement ......................................................................... 6-20
6-11. Attenuator Re moval and Re placement .............................................................................. 6-21
HP 16532A - Service
SECTION VI
Servic e
6-1. Introduction
Th e service policy for this instrument is re pla ce ment of defective asse mblies. This service manual
contains information for finding a defective
ass e mbly. This section contains information for
servicing the HP 16532A Oscilloscope Module.
In cl uded are a bl ock l eve l t h eory and procedu r es
for self diagnostics and troubleshooting. If the
module or a cable is determined fa ulty, procedures
are provided for module and cable replacement.
6-2. Safety Requirements
Specific warnings, cautions, a nd instructions are
placed wherever applicable throughout the
manual. These must be observed during all
pha ses of operation , serv ice, and repair of th e
module. Failure to comply with them violates
safety standards of design, manuf acture, and
intended use of this module. He wl e tt-Packard
assumes no liability for the failure of the customer
to comply with these sa fe ty requireme nts .
6-3. Recomme nded Test Equipment
Table 1-3 lists recommended test equipment. Any
equipment that sa tisf ie s the critical specification
given in the table may be s u bstitute d for the
recommended models.
6-5. Attenuator Theory of Operation
Th e chan n e l signals a re conditioned by the
attenuator/preamps, thick film hybrids containing
passive attenuators, impedance converters, and a
programmable amplifier. The channel s e nsitivity
defaults to the s ta ndard 1- 2-4 sequence (other
sens itiv itie s can be set also). However, the
firmware us e s pa s s iv e attenuation of 1, 5, 2 5, and
125, with the programmable pre amp, to cover the
entire s ensitivity range.
The input has a selectable 1 MΩ input impedance
with ac or dc coupling or a 50Ω input impedance
with dc coupling. Compensa tion for the pas s iv e
atten uators is laser trimmed and is n ot adjustable.
Afte r the pa s sive attenua tors, the signal is s plit into
high-frequency and low-frequency components.
Low frequency components are amplified on the
main assembly, where the y a r e combined with the
offset voltage. T he a c coupling is implemented in
the low frequency amplifier.
The high- and low-frequency components of the
signal are recombined and applied to the input
FET of the preamp. The FE T provides a high input
impedance for the preamp. The programmable
preamp adjusts the gain to suit the required
sens itivity and provides the output signal to the
main assembly. The output signal is then sent to
both the trigger circuitry and ADC .
6-4. M o dule Block Diagram and Theory of Operation
The following paragraphs contain block level
theory of operation. This theory is not intended for
component level troubleshooting, rather it is to be
used to help isolate a module failure to card leve l.
The HP 16532A Oscilloscope Module is contained
on one board. It runs at a 1 GSa/s digitizing rate,
with a 250 MHz single-shot (real-time) bandwidth,
8000 samples per measurement per channel, with
2-channe l s imulta ne ous a cquisition which is
expandable to up to 8 channels. See figure 6-1.
6-6. Main Assembly Theory of
Operation
Acquisition
Th e acquisition circuitry provides the s ampling,
digitizing, and storing of the signals from the
channel attenuators. The channels a r e i dentical.
Th e e xterna l trigger (E C L ) in put cannot be
displayed. Trigger signals from each channel and
the external triggers synchronize acquisition
through the time base circuitry. A 100 MHz
oscillator and a time base provide system timing
and sample clocking. A voltage-controlled
oscillator (VCO), frequency divider, and digital
6-1
HP 16532A - Service
Figure 6-1. H P 16532A Oscilloscope Block Dia gra m
phase detect or p rovide the s ample clock for higher
sample rates . After conditioning and sampling, the
signals a r e digitized, the n stored in a hybrid IC
containing a FI SO (fast in, slow out) memory.
ADC. The eight-bit AD C digitizes the cha nn e l
signal. D i gitiza tion is done by comparators in a
flash converter. The sample clock latches the
digitized value of the i nput to save it so that it can
be sent to memory.
6-2
FISO Memory. 8000 samples of the FISO (fast in,
slow out) memory a re used per mea s u re m e nt pe r
channel. M emory positions are n ot addressed
directly. The configuration is a ring which loops
continuously as it is clocked. Memory position is
tracked by counting clocks. The clocking rate is
the same as the ADC , h owev er the clock
frequency is half tha t of the ADC since the FI SO
clocks on both transitions of the clock period.
Data is buffered onto the CPU data bus for
processing.
HP 16532A - Service
Triggering. There are two main trigger circuits
that trigger four trigger sources. The two trigger
circuits are the an a l og trigger and the logic trigger.
Th e analog trigger IC operates as a multichannel
Schmidt trigger/comparator. A trigger signal (a
copy of t h e analog inpu t signa l ) from each of th e
inputs is directed to the ana log trigger IC inputs.
Th e trigger signal is continuously compared with
the trigger refere nce le vel selected by the user.
Once the trigger condition is met, the trigger T RUE
signal is fed to the logic trigger, which begins the
acquisition and store functions by way of the time
base.
Th e f our trigger sources are Channe l 1 , Channel 2,
Intermodule Bus (IMB), and external BNC. The
operation of the input channels was discussed
previously. The IMB trigger si gna l is sent directly
to the logic trigger. Externa l triggering is provided
by the BNC input of the 16500A Logic Analysis
System mainf ra me .
Time Base. T he time base provides the sample
clocks and timing necessary for data acquisition.
It consists of the 100 MHz reference oscillator and
time base hybrid.
The 100 MHz reference oscillator provides the
base sample frequency.
Th e time ba s e hybrid has programmable dividers
to provide the rest of the sample frequencies
appropriate for the time range se l e cted. The time
base us es the time-stretched output of the fine
interpolator to time-reference the sampling to the
trigger point. The time ba s e has counters to
control how much data is taken before (pre-trigger
data) and af te r (post-trigger data) the trigger eve nt.
Afte r the de s ire d number of pre-trigger samples
has occurred, the Time bas e hybrid sends a signal
to the Logic Trigger (trigger arm) in dicating it is
ready for the trigger event. When the trigger
condition is satis f ie d, the Logic Trigger sends a
signal back to the time base hybrid. Th e time base
hybrid then starts the post-trigger delay counter.
Wh e n the countdown reaches ze ro, the s ample
clocks are stopped and the CPU is signaled that
the acquisition is complete. The Fine Interpolator
is a dual- s l ope integrator that acts as a
time-interval stretcher. W h e n the l ogic trigger
receives a signal tha t mee ts the programmed
triggering requirements, it signals the time ba s e .
Th e time base then sends a pulse to the fin e
interpolator. The pulse is equal in width to the time
between the trigger an d the ne xt sample clock.
Th e f i ne interpolator stretches this time by a f actor
of approximately 500. Meanwhile, the time ba s e
hybrid runs a counter with a clock derived from the
sample rate oscillator. Whe n the inte rpolator
indicates the stretch is complete, the counter is
stopped. Th e count repre sents, with much higher
accuracy, the time between the trigger an d the firs t
sample clock. The count is stored and used to
place the recently a cquired data in rel a tionshi p
with previous data .
AC Cal. Th e AC Cal is a multiple xe r circuit that
can provide several signals to the Probe
Compensation/AC Calibrator output on the rear
pan el. The sign a l pr ov i ded depen ds on t h e m ode
of the instrument. I t can be either a probe
compensation si gnal, a pulse represe nting the
trigger event, s i gnals used for self-calibration, or
the 100 MHz reference oscillator when sample
period is 1 ns.
DC Cal. The DC Cal output, a rear panel signal, is
used for self-calibration. It is one output from the
16-channel DAC.
Digital Interface. The Digital Interface provides
control and interfa ce be twe en the sys te m control
and digital functions in the acquisition circuitry.
Analog Interface. T he Analog Interface provides
control of analog functions in the acquisition
circuitry. It is primarily a 1 6-channel DAC with an
accurate reference and filters on the outputs. It
controls channel offs ets an d trigger levels, a nd
provides the DC Cal output.
6-3
HP 16532A - Service
6-7. Self-Tests
The self-tests for the HP 16532A oscilloscope module will identify the improper operation of major functional areas in the module. T he y are not intended for component level diagnostics.
If there a re multiple oscilloscope modules, the user must select the specific oscilloscope module to be
tested at the ma in te s t sys te m me nu. M ultiple HP 16532A modules that are connected as one unit are recognized as a single unit in the test me nu. The exter na l trigger cables connected to the ECL IN and ECL
OU T do not need to be r emoved in or der to do the self- t est for each boar d. All other cable connection s
mus t be removed.
All s elf-tests can be run without access to the interior of the instrume nt. If a self-test fails, refer to
section 6-8, " Troubleshooting."
Self-Test Access Procedure:
1. Disconnect all oscilloscope inputs and turn on the power switch.
2. F rom the sta rtup scree n, s h own in figure 6 - 2, touch the Configuration field. Then, touch Test in the
pop-u p m enu.
6-4
Figure 6-2. Startup Screen
3. Insta ll the C omposite PV Tes t software disk in the in a ctive disk drive .
4. Touch the box labeled Touch box to Loa d Test System. See figure 6-3.
Note
When the self-test software is loaded, the user operating system is overwritten in
the mainframe system RAM.
HP 16532A - Service
Figure 6-3. Load Test System Screen
5. From the test system screen in figure 6-4, touch Test System, then touch 1 GSa /s SCOPE D. (For
the example s h own in figure 6- 4, the oscilloscope module is in slot D. If multiple oscilloscope modules are present, select the one to be tested.)
Figure 6-4. Test Sy st em Screen
6-5
HP 16532A - Service
Figure 6-5 shows the selection menu for choosing to perform functional tests. The status of the functional
tests is given.
Figure 6-5. Functional Tests Screen
6. Touch the Functional Tests field.
Figure 6- 6 is the ma in s elf-test menu. Se lf - tes ts can be either run individually by touching a specific test
field, or run automatically through all tests one time by touching the All Tests field. W he n e ithe r Al l Te sts
or individual tests are run, the status will cha n ge to eithe r PA SSED or FA ILED. If you do all tests by touch-
ing the All Tests field, skip to step 11. The procedures given in ste ps 7 through 12 use the A/D Test as an
example of how individual tests are done.
Figure 6-6. Main Test Menu
6-6
HP 16532A - Service
7. Touch the A/D Test field.
Th e in dividual test run screens, see figure 6-7, give the te s t na me, a brief description of the test, number of
test runs, a n d the number of test failures.
Figure 6-7. A/D Test Run Screen
8. Touch Run, then drag your finger to Single or Repetitive.
During the time a Single run or a Repetitive run is executing, the Run field displays Stop.
9. To stop a Repetitive run, touch Stop. See figure 6-8.
Figure 6-8. Stop Field
6-7
HP 16532A - Service
10. Touch Done to e xit t he A/D test.
11. To exit the self tests, touch the f oll owing fields in the lettered sequence below:
a. 1GSa/s Scope
b. Test System
c. Configuration
d. Exit Test
12. Touch the box that reads " Touch box to Exit Test Sys tem". Se e figure 6-9.
Figure 6-9. Exit Test Sy st em Screen
6-8
HP 16532A - Service
Self-Test Descriptions
The following self-tests check the major components of the HP 16532A oscilloscope module as well as all
ass ociate d circuitry. W h e n the self-tes ts h a ve all been completed with a "PASS" status, the major data and
control pipelines in the HP 16532A oscilloscope module are functioning properly.
Data Memory Test
Th is test verifies the correct operation of the FISO (fast-in/slow-out) data memory on ea ch board. Test
patterns are writte n into the memory and then re ad and compared with known val ues.
Timebase Test
Th e pre- trigger an d post-trigger delay modes are f irs t te s te d by programming a predetermined time
interva l in the trigger counters. At the e n d of the time intervals , the arm, trigger, and run sta tus bits are
read and compared with known values . The coarse and fine interpolators are then checked by reading
the val ue s of the interpolator counters a fte r a simulated acquisition. The counter val ue s are the n compared with a known valu e . Finally, the sample clock is checked by programming a sample clock
frequency and then reading the status of the clock to detect when one clock period has elapsed. The
clock period time interval is the n compared with a known val ue .
A/D Test
This test verifies the correct operation of the A/D convertor on each board. A check of the trigger in
Tri gger Imme dia te mode is f irs t ma de . The A/D conve rtors a re then exercised by setting the re f erence
voltage and channe l offset such that a simulated acquisition obtains data in the e xtre me s and middle of
the quantiza tion ran ge of the A/D convertor. Af te r e ach simulated acquisition, the data is compared with
known values.
D/ A Test
This test verifies the correct operation of the D/A convertor on ea ch board. Both the offse t a n d trigger
level D/A convertors for each channel are set to a ref erence level and then changed. The logic trigger IC
is programmed to detect the changes . The detection of a correct trigger indicates that the D/A convertor
is operating normally.
Trigger Test
This test verifies the correct operation of the trigger components on ea ch board. Firs t, the l ogic trigger
memory is checked by writing and then reading known patterns. The logic qualifie rs , logic trigger output,
and trigger holdoff are checked.
IM B Test
This te s t ve rif ie s the correct operation of the oscilloscope card interface to the intermodule bus.
All Tests
This will automatically execute e ach test, one a t a time, until all tests a re done.
6-9
HP 16532A - Service
6-8. Troubleshooting
Th e troublesh ooting flow chart given in figure 6-10 will isolate module failures to card leve l only. I t is not
intended for component level troubleshooting. If se lf - tes ts indicate a failure, begin at the Start of the troubleshooting flow chart. When a s pe cific test fa ils , you will be ins tructed to replace a faulty card or you will
be referred to other flow charts for the is olation of the faulty car d or cable.
The effects of ELECTROSTATIC D ISCHARGE can damage electronic components. Grounded wriststraps and mats should be used when you perform any
kind of service to this instrument or the cards in it.
Troubleshooting Aids
Th e C a l ibration menu contains the Service Cal mode that can help you troubleshoot the oscilloscope
module. When the problem is found and corrected, run all of the calibration procedures given in
Se ction IV, "Calibration."
If you suspe ct a f ault in the system, you can loa d the s ystem default values to see if the NVRAM pa r a meters ha ve possibly been corrupted. The procedure for loading the def ault values is giv en in Section IV u nder the heading "Loa ding the Defa ult Calibration Factors."
If loading the def ault values does n ot fix the problem, you may w ant to verify that the system clock is
working correctly. T h e procedure to ve rif y the system clock is given be l ow.
If none of thes e aids find the problem, go to the troubleshooting flow chart to find the problem. As stated
above, when the problem is found and corrected, run all of the calibration procedures given in Section IV
"Ca libration."
6-10
HP 16532A - Service
Verifying the System Clock
This procedure is provided as a troubleshooting aid to verify that the 100 MHz System Clock oscillator is
functioning properly. The 100 MHz oscillator is the primary time refe rence used for all of the a cquisition
clock periods. The test limits provided are the tes t limits f or the 100 MHz oscillator only. If the readings
are outside of the test limits, the oscilloscope module will not operate properly.
R e commended
Equipment R e quiredC ritical S pecification
Frequency Counter
> 100 MHz, 50 Ω
Model/Part Number
HP 5315A Option 003
Oscilloscope
Cable
Procedure:
1. Connect the BNC cable from the AC CAL OUTPUT connector on the rear panel of the HP 16532A
oscilloscope module to the input of the frequency counter.
2. On the HP 16532A oscilloscope module, set the following parameters, in the order given.
MenuSelectionSetting
Channel
Trigger
Calibration
Bandwidth ≥ 100 MHz, Real Time
50 Ω BNC (m to m) 48- in ch
s/Div
Auto-Trig
Mode
Procedure
Signal
HP 54502A
HP 10503A
1 ns
Off
Service Cal
Osc Out
Sample Clk
3. Select RUN-REPETITIVE. Observe the frequency displayed on the frequency counter and verify
that it is 100 MHz ± 0.005%.
4. Di s connect the BNC cable f rom the fre que ncy counter and connect the cable to the input of the
HP 54502A Oscilloscope.
6-11
HP 16532A - Service
5. On the HP 54502A Oscilloscope, set the following parameters, in the order given.
MenuSelectionSetting
Channel
Probe
V/Div
Offset
Coupling
1.000:1
200 mV
0.0 V
DC
Time bas e
Trigger
6. In the HP 16532A Oscilloscope trigger menu, select Auto-Trig On. Verify that the 100 MHz System
Cl ock is gated.
7. Select STOP on both the HP 54502A and HP 16532A oscilloscopes.
8. Disconnect the cable from both oscilloscopes.
s/Div
Acquisition
Mode
Level
Slope
10 ns
Realtime
Edge
− 200 mV
Falling
6-12
Troubleshooting Sheet 1
HP 16532A - Service
HP
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Figure 6-10. Troubleshooting Flowchart
SHEE
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1
6-13
HP
16532
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HP 16532A - Service
Troubleshooting Sheet 2
I
SHEE
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2
Figure 6-10. Troubleshooting Flowchart
6-14
Troubleshooting Sheet 3
HP 16532A - Service
HP
16532
A
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Figure 6-10. Troubleshooting Flowchart
SHEET
3
6-15
HP
16532
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HP 16532A - Service
Troubleshooting Sheet 4
I
SHEE
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4
Figure 6-10. Troubleshooting Flowchart
6-16
Troubleshooting Sheet 5
Figure 6-10. Troubleshooting Flowchart
HP 16532A - Service
HP
16532
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6-17
SHEE
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HP 16532A - Service
6-9. Oscilloscope Module Removal and Replacement
The effects of ELECTROSTATIC D ISCHARGE can damage electronic components. U se grounded wrist straps and mats when you are performing any kind of
service on this module.
Wh e n you ne ed to remove and replace a module, test the module firs t to determine the f aulty part. If
either of the trigger cables are faulty, re move the faulty cable and replace it with a new one. Refer to paragraph 6-1 0 f or procedures to remove an d replace a faulty cable. If eithe r of the attenuators a re faulty, re move the f aulty attenuator a n d replace it with a n e w one . Refe r to paragraph 6- 11 for procedures to remove a n d re place a f aulty attenuator.
Oscilloscope Module Removal Procedure:
Do not install, remove or replace the module in the instrument unless the instrument power is turned off.
1. Turn off the instrument power switch, unplug the power cord, and disconnect any input or output
connections.
2. Starting from the top, loosen the thumb screws on the filler panels and the cards. See figure 6-11.
Figure 6-11. Endplate Overlap - T op Sequence
3. Starting from the top, pull out the cards and the filler panels halfway .
4. P ull out the oscilloscope module completely.
6-18
HP 16532A - Service
5. If a trigger cable w a s determined to be fa ulty, replace the faulty trigger cable on the oscilloscope
module (refer to paragraph 6- 1 0). Otherwis e , s kip to step 6.
6. If a n attenuator was determined to be fa ulty, re pla ce the faulty attenuator on the oscilloscope module (ref e r to paragraph 6-11). Otherwis e , s kip to step 7.
7. If the oscilloscope module was determined to be faulty, re m ove the attenuators f rom the os cilloscope module (refer to para graph 6-11).
8. A cquire a replacement oscilloscope module and install the attenuators on the replacement oscilloscope module (refer to para graph 6-11).
9. Reinsta l l the repaired (or repla cem ent) oscilloscope module in the mainframe (refer to the next procedure "Oscilloscope Module Replacement Procedure").
Oscilloscope Module Replacement Procedure
1. If you ha v e not already done so, pull the insta ll e d boards half wa y out of the card slots (refe r to
steps 1 through 3 of the preceding procedure "O s cilloscope Module R emoval").
2. Determine which modules you want to install in the mainframe, and the slots where you want them
installed.
3. Starting with the bottom slot, slide each module to be instal led approximately half w a y i nto the mai nframe card slot.
4. F irmly s eat the bottom card into the backplane connector. Keep applying pressure to the center
of the card endplate while tightening the thumb screws finger tight.
5. Repeat step 4 for all cards and filler panels in a bottom-to-top order. See figure 6-12.
F igure 6-1 2 . Endplate Overlap - Bottom Sequence
6. A ny fille r pane ls tha t a re not used should be kept for future use. Fille r pane ls mu st be installed in
all unuse d card slots for correct air circulation.
6-19
HP 16532A - Service
6-10. Trigger Cable Removal and Replacement
The effects of ELECTROSTATIC D ISCHARGE can damage electronic components. U se grounded wriststraps and mat s when performing any kind of service
to this instrument or the cards in it.
Trigger Cable Removal Procedure:
1. Follow the procedures given in paragraph 6-9 " Os cilloscope Module Removal a nd Replacement" to
remove the HP 16532A Oscilloscope Module to be serviced.
2. Remove the he x nut (H4) and the wa sher (H5) from the SM B connector on the cable to be removed.
See figure 6-13.
6-20
Figure 6-13 . Oscilloscope Module Exploded View
HP 16532A - Service
3. Pull the straight SMB connector on the cable through the hole in the rear panel.
4. P ull the right-a n gle SMB connector on the cable away from its mating connector on the board.
5. Install a new cable (refer to the next paragraph).
Trigger Cable Replacement Procedure:
1. Ins ta ll the s tra i ght S M B connector on the cable through the hole in the rear panel. See figure 6- 1 3.
2. Attach the washer (H 5 ) and the hex nut (H4) to the straight SMB connector on the cable. Tighten
the hex nut.
3. Conne ct the right-angle SMB connector on the cable to its mating connector on the board.
6-11. Attenuator Removal and Replacement
The effects of ELECTROSTATIC D ISCHARGE can damage electronic components. U se grounded wriststraps and mat s when performing any kind of service
to this instrument or the cards in it.
Attenuator Removal Procedure:
1. Follow the procedures given in paragraph 6-9 " Os cilloscope Module Removal a nd Replacement" to
remove the HP 16532A Oscilloscope Module to be serviced.
2. Remove the four hex nuts (H3 ) from the B NC connectors on the rea r pan e l (M P1). See figure 6-13.
3. Remove the two hex nuts (H4) a nd the two was he rs (H5 ) f rom the S MB connectors on the rea r
panel.
4. Remove the three end plate screws (H6) holding the rear panel (MP1) and the ground spring (MP2)
to the board asse mbly (A1).
5. P ull the re ar panel (MP1) and the ground spring (MP2) from the board asse mbly (A1). You may
need to loosen the a ttenua tor retainer screws (H7) before removing the ground spring.
6. Remove the two attenuator retainer screws (H7) holding the attenuator assembly (A2) to the board
ass e m bly (A 1 ).
7. Gently pull the atten ua tor as s e mbly (A 2 ) s tra ight up from the board asse mbly (A 1 ) bei ng caref ul not
to damage the connector and the components beneath th e attenua t or assembly.
8. Install a new attenuator assembly (refer to the next paragraph "Attenuator Replacement Procedure").
6-21
HP 16532A - Service
Attenuator Replacement Procedure:
a. G e ntly push the a tte n ua tor as s e m bly (A 2 ) stra i ght down on the board asse mbly (A 1) being carefu l
not to damage the connector and the components beneath the attenuator assembly. See figure
6-13.
b. Attach the attenuator a s s embly (A2) to the board assembly (A1 ) with the two attenua tor reta i ner
screws (H7).
c. Asse mble the re ar panel (MP 1) and the ground spring (MP2) to the board assembly (A1) a nd attach
them with the thre e end plate screw s (H6). Y ou ma y need to loosen the a tten uator retainer s crew s
(H7) before assembling the ground spring to the board asse mbly, then tighten the attenua tor
screws (H7) when the ass e mbly is finished.
d. Attach the SMB connectors to the rear pa n e l (M P1) with two hex nuts (H4) a n d two wash e rs (H 5 ).
e. Attach the BNC connectors to the rear pane l (M P1) with four hex nuts (H 3 ).
Note
Tighten the hex nuts down so that they will not interfere with the installation of the
boar d above the os cilloscope module. One of t he flat surfaces on the outside
edge of the nu t should be parallel with the top edge of the rea r panel.
6-22
CERTIFICATION
Hewle tt-Packard Company certifies that this product met its published spe cifications at the time of s hi pment from the f actory. Hewle tt-Packard further certifie s that its calibration meas ur e m e nts are traceable to
the Unite d States National I nstitute of Standards an d Technology, to the extent a l l owed by the I ns titute’s
calibration facility, and to the calibration facilities of other Interna tional Standards Organization members.
WARRANTY
This H e wl e tt-Packard product is warranted agains t defe cts in material and workmanship for a period of
one year from date of s hipment. D uring the w a rra nty pe riod, Hewle tt-Packard Company will, a t its option,
either repair or replace products which prove to be defective.
For warra nty s ervice or repair, this product must be returned to a se rv ice f a cility designated by HP . B uy e r
shall prepa y s h i pping charges to HP and HP s h a ll pa y s hi pping charges to return the product to Buyer.
However, Buyer shall pay all sh ipping charges, duties, and taxes for products returned to HP from an other
country.
HP wa rra nts that its software and firmware designate d by HP f or use with an ins trume nt will execute its programming instructions when properly instal le d on that instrument. HP does not warra nt that the operation
of the instrument or software, or firmware will be uninte rrupted or error free.
LIMITATION OF WARRANTY
Th e foregoing warranty s h a ll not apply to defects resulting from improper or inadequa te ma inte n an ce by
Buyer, buyer-s u pplied software or interfa cing, unauthorize d modification or misuse, operation outside the
environmental spe cifications for the product, or improper site preparation or maintenance.
NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. HP SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
EXCLUSIVE REMEDIES
THE R E MEDIES P ROVIDED HEREIN ARE BUY E R’S SOLE AND EXCLUS IV E REMEDIES. HP SHALL NOT
BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.
ASSISTANCE
Product maintenance agreements and other customer ass is ta nce a gree m e nts a re available for HewlettP ackar d p roducts.
For any assistance, contact your nearest Hewlett-Packard Sales and Service Office.
CWA388
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