Versatile two- orfour-channelhigh-performanceFFT-based spectrum/network analyzer

122 µµµµµHz to 102.4 kHz16-bit ADC

HP 35670ADynamic SignalAnalyzer

Product Overview

piezoelectric integrated circuit powersupply, analog trigger and tachometerinputs, and optional computed ordertracking.

Versatile enough to be

your only instrument for

low frequency analysis

With the HP 35670A, you carryseveral instruments into the field inone package. Frequency, time, andamplitude domain analysis are allavailable in the standard instrument.Build on that capability with optionsthat either add new measurementcapability or enhance all measure-ment modes.AY6 Add Two Channels (Four Total)1D0 Computed Order Tracking1D1 Real-Time Octave

MeasurementsUK4 Microphone Adapter and

Power Supply1D2 Swept-Sine Measurements1D3 Curve Fit and Synthesis1D4 Arbitrary Waveform Source

The HP 35670A is a portable two- orfour-channel dynamic signal analyzerwith the versatility to be severalinstruments at once. Rugged andportable, it’s ideal for field work. Yetit has the performance and function-ality required for demanding R&Dapplications. Optional featuresoptimize the instrument for trouble-shooting mechanical vibration andnoise problems, characterizingcontrol systems, or general spectrumand network analysis.

Take the HP 35670A

where it’s needed!

Whether you’re moving an instrumentaround the world or around the lab,portability is a real benefit. Smallenough to fit under an airplane seat,the HP 35670A goes where it’sneeded. But there’s more to portabil-ity than size. Like a nominal 12- to28-volt dc power input and self-contained features that do not requireexternal hardware, such as built-in

1C2 HP Instrument BASICUFF Add 1-Mbyte NVRAMAN2 Add 4-Mbyte RAM

(8 Mbytes Total)UFC Add 8-Mbyte RAM

(12 Mbytes Total)100 1D0 - 1D4/UFC bundle

Laboratory-quality

measurements in the field

Obtain all of the performance of yourbench-top analyzer in a portableinstrument.

Ease-of-use

Portability, versatility, and perfor-mance are valued attributes, but to bereally valuable an instrument mustalso be easy to use. The HP 35670Ahas a friendly front panel, plus onlinehelp that’s always available to answeryour questions. An interactivemeasurement state lets you configurethe instrument setup from a singledisplay.

Frequency Range 102.4 kHz 1 channel51.2 kHz 2 channel25.6 kHz 4 channel

Dynamic Range 90 dB typicalAccuracy ±0.15 dBChannel Match ±0.04 dB and

±0.5 degreesReal-time Bandwidth 25.6 kHz/1 channelResolution 100, 200, 400 & 800 linesTime Capture 0.8 to 5 Msamples

(option UFC)Source Types Random, Burst random,

Periodic chirp, Burstchirp, Pink noise, Sine,Swept-Sine (option1D2),Arbitrary (option 1D4)

The HP 35670A

shown with Four Channels

(option AY6)

2

Shown with

option AY6 -

Add Two

Channels

Input Channels• Analog A-weighted

filters (switchable)• Transducer

sensitivity input• Engineering units:

g, m/s2, m/s, m, in/s2,in/s, in, mil, kg, dyn,lb, N, and pascals

• Built-in 4 mAconstant currentpower supply

Large 6.9 inch(17.5 cm) displayDisplay area is notcompromised byportability

PrecisionMeasurements

• 16-bit ADC• ±0.15 dB spectrum

ampltude accuracy• ±0.04 dB, ±0.5

degrees channelmatch (full scale)

• 90 dB dynamicrange (typical)

• 130 dB dynamicrange with swept-sine (option 1D2)

• Up/Down autorange• Up only autorange

Math FunctionsPowerful math anddata editing functionsto quickly modifymeasurement results.(Curve fit andfrequency responsesynthesis availablewith option 1D3.)

Built-In 3.5 inchFlexible Disk DriveStore instrumentstates, programs, timecaptured data,waterfall data, tracedata, limits, mathfunctions, data tables,and curve fit/synthesistables.Supported disk formatsare HP-LIF andMS-DOS. Internal RAMmay also be formattedas storage disk.

Powerful MarkersExtract informationfrom measurementdata with trace andspecial markers:

• Individual Trace• Coupled Trace• Absolute or Relative• Peak Search• Harmonic• Band• Sideband Power• Waterfall• Time Parameter• Frequency and

Damping

VersatileMeasurement ModesStandard and optionalmeasurement modes include:

• FFT Analysis• Real-Time Octave Analysis

(option 1D1)• Order Analysis (option 1D0)• Swept-Sine (option 1D2)• Correlation Analysis• Histogram Analysis• Time Capture

All measurement optionsmay be retrofitted.

RPM DisplayRead RPM in anymeasurement mode

HP Instrument BASIC(Option 1C2)Develop a custom user-interface, integrateseveral instruments andperipherals into a systemusing the HP 35670A asthe system controller,or simply automatemeasurements.

Online HelpApplicationsoriented helpis just a fewkeystrokes away.

HP 35670A Dynamic Signal Analyzer

3

Source Types• Random Noise• Burst Random

Noise• Periodic Chirp• Burst Chirp• Pink Noise• Fixed Sine• Arbitrary

WaveformSource(Option 1D4)

• Swept-SineSource(Option 1D2)Note: Thesource islocated onthe front panelof a standardtwo-channelHP 35670A.

HP-IB ConnectorIntegrate theHP 35670A withother instrumentsand peripherals forsystem operation orprinting/plotting.System controllerfor HP-IB (IEEE-488.1 and 488.2)compatibleinstrumentation viaHP InstrumentBASIC (option 1C2).Provides directcontrol of HP-IBprinters, plotters,and HP SS80 diskdrives.

Serial PortPlot to HP-GLplotters or print toHP-GL and rasterprinters.

Parallel PortPlot to HP-GL plottersor print to HP-GL andraster printers.

DC PowerAccepts 12 to 28 voltsdc (nominal). Use theHP 35250A powercable for DC powersource connection, orthe HP 35251A powercable with cigarette-lighter adapter.

Low Noise FanFan may be turnedoff for acousticapplications.Running speeddepends onambienttemperature.

External MonitorDrive a multisyncmonitor for remoteviewing by largegroups.

Tachometer(42 Volt Peak Max)No external signalconditioning hardwarerequired. Readsfrequency (RPM) onselected levelsbetween ±20 volts.

External Trigger(42 Volt Peak Max)No external signalconditioninghardware required.Triggers on selectedlevel between±10 volts.

KeyboardUse a standard PCkeyboard to title data,edit HP InstrumentBASIC programs,or to operate theinstrument.

Power SelectSwitch betweenac and dc powersources withoutinterruptinginstrumentoperation.

AC PowerUniversal powersupply willoperate with anycombination ofvoltage between100 and 240 VACand linefrequencybetween 47 and440 Hz. Themaximum powerrequirement is350 VA.

4

Averaging

Various averaging modes let youfurther refine spectrum analysismeasurements. Time averagingextracts repetitive signals out of thenoise while rms averaging reducesthe noise to its mean value. Exponen-tial averaging, available for both timeand rms averaging, is useful forreducing the noise while followingchanging signals—tracking theresonance shifts in a fatiguingstructure for example.

FFT-based spectrum analyzers, suchas the HP 35670A, are ideal formeasuring the spectra of low-frequency signals like speech ormechanical vibration. Transientcomponents, usually missed withswept-frequency analyzers, are easilymeasured and displayed at speedsfast enough to follow trends. TheHP 35670A has both the performanceand features required to take fulladvantage of this technology.

16-Bits for High Performance

With a 16-bit ADC (90 dB typicaldynamic range) and a real-timebandwidth of 25.6 kHz, you can besure nothing will be missed. Resolvesignals using 100 to 1600 linesresolution, or for really close-inanalysis, use frequency zoom toresolve signals with up to 61 µHzresolution. Use time or RPM armingto develop waterfalls of sequentialvibration spectra for trend analysis orfor an overview of device vibration.

Power and Linear Spectrums

Match your spectrum measurementmode to the signal being tested. Uselinear spectrum analysis to measureboth the amplitude and phase ofperiodic signals such as the spectra ofrotating machinery. Power spectrumanalysis is provided for averagingnonrepetitive signals.

Two spectrums

of road induced

vibration measured

at different speeds

are compared using

the front/back

mode of the

HP 35670A.

Spectrum Analysis

5

Time Domain

Use your spectrum analyzer as a low-frequency oscilloscope or viewsignals in the time and frequencydomains simultaneously. (Note: anti-alias filters can be switched off.)Special markers for time-domain datafacilitate extraction of key controlsystem performance parameters:overshoot, rise time, setting time, anddelay time.

Data Table

Use a tabular format to keep trackof key frequencies in the spectra ofrotating machinery. The amplitudeand frequency of the signal and a16-character entry label field arelisted for each selected point.

Markers

Markers streamline analysis byhelping you select and display specificdata. Marker functions include markerto peak, next right peak, and coupledmarkers for selecting points inmultiple data displays. Markersreadouts are absolute or relative toyour selected reference.

Special Markers

Three special marker functionsfacilitate analysis of your spectraldata. Sideband markers aid analysisof modulation signals. Use thisfunction to quickly locate sidebandsin the complicated spectra of rotatingmachines. A band-power marker readsthe total power in a selected band offrequencies and a total harmonicdistortion marker lets you calculatetotal harmonic distortion withoutincluding the effects of noise.

Measurement

results at key

frequencies can

be labeled and

listed using data

table.

Harmonic markers

are used to

calculate the THD

of a signal without

including the

effects of noise.

Simultaneous

display of

frequency

and time domain

data facilitates

analysis of gear

mesh vibration.

Automatic Units Conversion

Display vibration data in the unitsof your choice. Select g, m/sec2,

in/sec2, m/s, in/s, m, mil, inch,

Kg, lb, N, dyn, or pascals as appropri-ate for your application. The instru-ment automatically converts fre-quency-domain data from specifiedinput transducer units to the unitsyou select for display. For example,accelerometer data is automaticallyconverted and displayed as mils whenmils are selected. Of course, dB, dBV,

dBm and volts are available forelectrical applications.

6

The HP 35670A has the flexibilityto make measurements of bothelectrical networks and mechanicaldevices. FFT-based network analysisis fast enough to allow real-timeadjustments of circuit parameterswhile the swept-sine option providesexacting measurements over morethan six frequency decades, and a130 dB dynamic range.

Source

Select the optimum stimulus for eachapplication—random noise, periodicchirp, pink noise, fixed sine, burstrandom, and burst chirp. For zoomednetwork analysis measurements, thesource is band-translated to matchthe zoom span at frequencies up to51.2 kHz. An optional arbitrary sourcelets you test your product using real-world signals. A ±10 volt dc sourceoffset facilitates tests of controlsystems.

Impact Testing

Force and exponential windowsallow impact testing for modal andstructural analysis. Quality measure-ments are ensured using preview andaccept/reject during averaging. A4 mA constant current transducerpower supply is built-in for trueportability.

Limits

Test network measurements againstpreset limits. Up to 800 separate linesegments are available for settingupper and lower limits. Limits arealso used for testing spectrummeasurements.

Four Channels (option AY6)

Test up to three devices simulta-neously with a four-channelHP 35670A. Channel one is thecommon reference channel andtwo, three, and four are the responsechannels. Alternatively, selectchannels one and three as referencechannels for two totally independentnetwork measurements. Seeoption AY6 description for moreinformation.

Limits are used

for go/no go

testing in

production. The

response of an

accelerometer is

being checked in

this example.

Characteristics

of a selected

resonance are

automatically

calculated from

an impact

measurement

using the frequency

and damping

marker.

Frequency Response Measurements

7

Markers

A frequency and damping markerprovides the resonant frequency andthe damping ratio of single-degree-of-freedom frequency response measure-ments.

Gain and phase margin markersextract key frequency-domainstability data from frequency-response measurements ofcontrol systems.

Signal Injection for Control

Loops

Use one of three HP signal injectiondevices for testing control loops. TheHP 35280A summing junctionprovides convenient dc to 1 MHzsignal injection for most controlloops. Use the HP 35281A clip-ontransformer when it is not possible totemporarily open the loop, or use theHP 35282A signal injection trans-former when secondary voltages areup to 600 Vpk.

STARModal and STARAcoustics areproducts of Structural MeasurementSystems.

CADA-PC is a product of LMS International.

Microsoft® is a U.S. registered trademarkof Microsoft Corp.

AMI PRO is a product of LotusDevelopment Corp.

Capture transient events or timehistories for complete analysis in anymeasurement mode (except swept-sine). Use either the entire time-capture record or a selected region ofinterest for repetitive analysis in theFFT, octave, order track, correlationor histogram instrument modes.

Add an additional 4 Mbytes (optionAN2) or 8 Mbytes (option UFC) ofmemory for really deep time-capturecapability.

Time Capture

An interval of

time-capture data

has been selected

for analysis in the

octave mode.

8

Self-contained—no ratio

synthesizer or tracking

filter required

Order Maps

Order Tracking

RPM or Time Trigger

Display RPM Profile

Track Up to Five

Orders/Channel

Up to 200 Orders

Composite Power

RPM Measurements

Order tracking facilitates evaluationof spectra from rotating machines bydisplaying vibration data as a functionof orders (or harmonics) rather thanfrequency. All measurement spectrais normalized to the shaft RPM.

Now you can have order trackingwithout compromising portability.Traditional analog order tracking

techniques require external trackingfilters and ratio synthesizers. WithHP’s computed order trackingalgorithm, external hardware is gone.

Because order tracking is imple-mented in the software, data is moreprecise and your job is easier.Compared to traditional analog ordertracking techniques, computed ordertracking offers:

• Improved dynamic range athigh orders

•More accurate tracking of rapidlychanging shaft speeds

•Accurate RPM labeled spectrawith exact RPM trigger arm

•Wide 64:1 ratio of start to stop RPMs

Order Map

Use order maps for an overview ofvibration data versus RPM or time.Display the amplitude profile ofindividual orders and suborders usingthe slice marker function. Alterna-tively, use trace markers to selectindividual traces for display.

Taking the measurement is onlyhalf the job. Raw measurement datamust be stored, recalled, printed,plotted, integrated with other datafor analysis, and reported. TheHP 35670A has a variety of tools tohelp you finish the job.

Enhanced Data Transfer

Utilities for PCs

Standard Data Format (SDF) Utili-ties, provided with the HP 35670A,allow you to easily move data from theinstrument to wherever it’s needed:

• For general digital signal processingand filtering , translate data files toformats compatible with MATLABand MATRIXX, Data Set 58, or ASCIIfor use in popular spreadsheets.

• For specific applications, useapplication software that reads SDFfiles directly, such as STARModaland STARAcoustics from SMS andCADA-PC from LMS.

• Transfer data to and from theHP 35665A, 3566A, 3567A, 3562A,3563A.

• Use the viewdata feature to displaydata on your PC or to convert to theHP-GL format for transfer to Micro-soft’s Word for Windows or Lotus’AMI PRO word processing software.

• Convert between HP-LIF andMS-DOS formats.

• Read data files into a program.

Documented Results

The HP 35670A supports a variety ofHP-IB, serial and parallel printers andplotters for direct hardcopy output.The internal 3.5 inch flexible diskdrive stores data, instrument states,HP-GL plots and HP InstrumentBASIC programs in HP-LIF or MS-DOSformats for future recall or use on HPworkstations or a personal computer.

Entire display screens can beimported directly into your wordprocessing program by plottingHP-GL files to your named DOS file.HP-GL files are interpreted anddisplayed directly by Microsoft’sWord for Windows and AMI PROfrom Lotus Development Corp.

The slice marker

feature is used

to select and

display an order

or suborder from

an order map.

Using MeasurementResults

Computed Order Tracking(Option 1D0)

9

Order Tracking

Measure only the data you need.Order tracking lets you measure theamplitude profile of up to five ordersplus composite power simultaneouslyon each channel. Up to four ordersor three orders and composite powercan be displayed simultaneously.

5.021kRPM

5.32kRPM

5.502kRPM

5.711kRPM

RPM Profile

Use RPM profile to monitor thevariation of RPM with time duringorder tracking measurements.

Composite Power

Composite power provides the totalsignal power in a selected channel asa function of RPM.

Run-Up and Run-Down

Measurements

Run-up and run-down measurementsof any order are made using externaltrigger as the phase reference.Display the results as bode or polarplots; both are available. Markersallow convenient notation of impor-tant shaft speeds.

Order tracking

is used to

simultaneously

display up to

four orders or

a combination

of orders,

composite power

and RPM profile.

Markers are used to

annotate shaft

speeds at selected

points in a run-up

measurement.

Oscilloscope-

quality orbit

diagrams mean

you carry only

one instrument

onto the shop

floor.

Orbits

Obtain oscilloscope-quality orbitmeasurements with your HP 35670A.Unlike traditional FFT analyzers, theHP 35670A equipped with computedorder tracking displays a selectednumber of loops (usually one) as theshaft RPM is varied.

10

Real-Time Third Octave to 40 kHz

ANSI S1.11-1986 Filter Shapes

Microphone Inputs and Power

A-Weighted Overall SPL

RPM or Time-Triggered Waterfalls

Eliminate the expense and inconve-nience of multiple instruments in thefield. With optional real-time octaveanalysis, and the optional microphoneadapter and power supply, you havea complete real-time octave analyzeradded to your HP35670A at a fractionof the cost of a second instrument.Now you can carry both your FFTand real-time octave analyzers to thejob site in the same hand.

Real-Time 1/3-Octave to

40 kHz on One Channel

With two input channels of 1/3-octavereal-time measurements at frequen-cies up to 20 kHz, you get all of theinformation you’ll ever need tounderstand the noise performance ofyour product. No misinterpretedmeasurements because transientcomponents were missed. When thefrequency range requirement is 10kHz or less, use four channels tocharacterize spatial variations. Forthose exceptional circumstances, use1/3-octave resolution at frequenciesup to 40 kHz on a single channel.Resolutions of 1/1- and 1/12-octaveare also available.

Real-time

1/3-octave

measurements

at frequencies

up to 40 kHz.

Overall sound pressure level andA-weighted sound pressure level canbe displayed with the octave bandsindividually, together, or not at all.

A fan-off mode lets you use theinstrument in the sound field beingmeasured.

ANSI S1.11-1986

All octave filters comply with filtershape standards ANSI S1.11-1986(Order 3, type 1-D), DIN 45651, andIEC 225-1966. An 80-dB dynamicrange for the audio spectrum pro-vides the performance required byacousticians. Switchable analog A-weighting filters in the input channelscomply fully with both ANSI S1.4-1983 and IEC 651-1979 Type 0.

This waterfall

display of a

flyover test

can be analyzed

trace-by-trace or

by selecting time

slices along the

z-axis.

Advanced Analysis

Use waterfall displays of octave datafor an overview of device noiseversus time or RPM. Display indi-vidual frequency bands as a functionof RPM or time using the slice markerfunction. Alternatively, use tracemarkers to select individual traces fordisplay.

A pink noise source is available fortesting electro-acoustic devices.

Sound Level

Meter Measurements

Peak hold, impulse, fast, slow, and Leq

are all provided with optional Real-time Octave Measurements. Allmeasurements conform to IEC 651-1979 Type 0 - Impulse.

Real-Time Octave Measurements(Option 1D1)Microphone Adapter and Power Supply(Option UK4)

HP 35670A with

option UK4

microphone

adapter and

power supply.

11

Characterize Nonlinear

Networks

Use the auto-level feature to hold theinput or output amplitude constantduring a sweep. This provides thedevice response for a specific signalamplitude. With FFT-based networkanalysis using random noise, therandom amplitudes of the stimulustend to “average out” the non-linearities and therefore does notcapture the dependency of theresponse on the stimulus amplitude.

Logarithmic Sweep

Test devices over more than sixdecades of frequency range usinglogarithmic sweep. In this mode, thefrequency is automatically adjusted toprovide the same resolution overeach decade of frequency range. WithFFT-network analysis, resolution isconstant—not a problem whenmeasuring over narrow frequencyranges.

Flexible

Make the measurement your way.Independently select logarithmic orlinear sweep, sweep up or down,automatic or manual sweep, andautoresolution.

130-dB Dynamic Range

Logarithmic or Linear Sweeps

“Auto” Frequency Resolution

Automatic Frequency

Resolution

Use autoresolution to obtain thefastest sweep possible withoutsacrificing accuracy. Withautoresolution, the HP 35670Aautomatically adjusts the frequencystep according to the device re-sponse. High rates of amplitude andphase change are matched with smallfrequency steps. Low rate-of-changeregions are quickly measured withlarger frequency steps.

Test Multiple Devices

Simultaneously

Increase throughput in production.Swept-sine measurements up to25.6 kHz can be made on threedevices simultaneously using swept-sine on a four-channel HP 35670A.Channel one is the common referencechannel for these measurements.

Alternatively, channels one andthree can be designated as indepen-dent reference channels for twototally independent swept-sinemeasurements.

While FFT-based network analysis isfast and accurate, swept-sinemeasurements are a better choicewhen the device under test has awide dynamic range or covers severaldecades of frequency range. Useswept-sine measurements to extendthe network measurement capabili-ties of the HP 35670A.

Network Analysis Over a

130-dB Range

With traditional swept-sine, theHP 35670A is optimally configured tomeasure each individual point in thefrequency response. The result is a130 dB dynamic range. With FFT-based network analysis, all frequencypoints are stimulated simultaneouslyand the instrument configures itselfto measure the highest amplituderesponse—thereby limiting thedynamic range.

The stability of

a control loop

is quickly

characterized

using the gain

and phase margin

marker function.

Swept-Sine Measurements(Option 1D2)

12

Realize the advantages of using yourinstrument with a computer withoutsacrificing portability. HP InstrumentBASIC provides the power of acomputer inside your HP 35670A.

• Create custom interfaces forsimplified operation.

• Use the HP 35670A as a systemcontroller to integrate it with otherinstruments and peripherals.

• Enhance functionality by creatingcustom measurements.

• Increase productivity withautomated operation.

HP Instrument BASIC is a compatiblesubset of the HP BASIC used inHP 9000 series 200, 300, 400 and 700computers.

Easy Programming

The HP Instrument BASIC programeditor supports:

• Line-by-line syntax checking• Pre-run program verification• Single step and debug• Automatic line numbering

An optional PC-style 101-key key-board facilitates program develop-ment and editing. Simple programscan be entered or edited using thefront-panel keys. Large programs canbe developed or edited in HP 9000Series 200, 300, and 400 computers,or on a HP Vectra with InstrumentBASIC for Windows, HP E2200A, andthen transfered to the HP 35670A.

Over 200 HP Instrument BASIC

Commands

Keystroke Recording

Most program development beginswith keystroke recording. Eachkeystroke is automatically saved as aprogram instruction as you set upyour measurement using the frontpanel. The recorded sequence can beused as the core of a sophisticatedprogram or run as an automaticsequence.

Binary functions

Trigonometricoperations

String operations

Logical operators

HP-IB control

Mass storage

Event initiatedbranching

Clock and calendar

General device I/O

Array operations

Program entryand editing

Program debugging

Memory allocation

Relation operators

General math

Graphics control

Graphics plotting

Graphics axesand labeling

Program control

HP Instrument BASIC(Option 1C2)

Keystroke

recording

quickly creates

the core of your

HP Instrument

BASIC program.

HP Instrument

BASIC can be

used to display

measurement

results in a new

format or

to create a

new operator

interface.

13

Curve Fit and Synthesis(Option 1D3)

Use curve fit and synthesis in theHP 35670A to take the guesswork outof your design process. The 20-poleand 20-zero multiple-degree-of-freedom curve fitter calculates amathematical model of your systemor circuit from measured frequencyresponse data. The model can beexpressed in pole/zero, pole/residue,or polynomial format.

20 Poles/20 Zeros Curve Fitter

Frequency Response Synthesis

Pole/Zero, Pole/Residue and

Polynomial Format

Transfer the circuit model to thesynthesis function to experiment withdesign modifications. Add and deletepoles and zeros, change gain factors,time delays, or frequency scaling,then synthesize the frequencyresponse from the modified model.Design modifications are testedwithout ever touching a solderingiron.

Curve fit

provides an exact

mathematical

model of your

circuit or device.

51.2-kHz Frequency Range On

One and Two Channels

25.6-kHz Frequency Range On

Four Channels

One or Two Reference Channels

Enhance your productivity by addingtwo additional input channels to yourportable analyzer. Having fourchannels often means the differencebetween solving a problem in thefield and having to schedule time ina test bay.

Monitor four signals simultaneouslyor use channel one as the referencechannel for up to three simultaneouscross-channel measurements. Twototally independent cross-channelmeasurements are made by selectingchannels one and three as indepen-dent reference channels. All channelsare sampled simultaneously.

Use triaxial measurements to simulta-neously characterize the motion ofmechanical devices in three axes.

For control systems, simultaneouslymeasure several points in a singleloop.

Add Two Channels(Option AY6)

14

Frequency or Time Domain Entry

Data Edit

Store Up to Eight Arbitrary

Waveforms

Test your products using real-worldsignals. Measure a signal in either thetime or frequency domain, thenoutput it via the arbitrary waveformsource. Use math functions and dataedit to obtain precisely the outputwaveform you need. An arbitrarywaveform may be output once orrepeatedly.

Standard source types can beoptimized for specific applications.For example, random noise can beshaped to improve the effectivedynamic range of your measurement.Alternatively, you can use data editand math functions to create anarbitrary waveform.

Use time capture as a digital taperecorder, then playback capturedsignals through the arbitrary wave-form source.

Math functions are

used to optimize a

burst chirp signal

for a frequency

response

measurement.

Add 8-Mbytes RAM(Option UFC)Add 4-Mbytes RAM(Option AN2)

Number of Spectra Stored Per Channel

Standard Add 4 Mbyte Add 8 Mbyte

FFT - 1 Channel 1 130 600 1000

FFT- 2 Channels 2 50 250 400

FFT - 4 Channels 3 20 100 200

1/3-Octave Spectra 4 4000 18800 32000

Time Capture 1 550 KSamples 2.6 MSamples 4.7 MSamples

1 Conditions: Preset with instrument mode switchedto 1 channel.

2 Conditions: Preset3 Conditions: Preset with instrument mode switched

to 4 channels.4 Conditions: Preset with instrument mode switched

to octave.

Expand the data storage and time-capture capacity of your HP 35670A.

Arbitrary WaveformSource(Option 1D4)

Add 1-Mbyte NonvolatileRAM(Option UFF)

Use the 1-Mbyte nonvolatile RAM inenvironments too harsh for the 3.5inch flexible disk drive. The memoryfunctions as a high-speed disk forstorage of the following information.

•Instrument Setup States•Trace Data•User Math Definitions•Limit Data•Time Capture Buffers•HP Instrument BASIC Programs•Waterfall Display Data•Curve Fit/Synthesis Tables•Data Tables

Information stored in nonvolatileRAM is retained when the power isoff.

15

HP 35670A

Dynamic Signal Analyzer

Standard Configuration:

•1.4 Mbyte, 3.5-in. flexible disk drive

•1.5 Mbytes user RAM

• Impact Cover

•Standard Data Format Utilities

•AC Power Cord

•Operating manual set including:

Operator’s GuideQuick Start GuideInstallation and Verification GuideHP-IB Programming with theHP35670AHP-IB Commands:Quick ReferenceHP-IB Programmer’s Guide

•Standard one-year warranty

Options for the HP 35670A

Opt. Description

AY6 Add Two Channels (four total)1D0 Computed Order Tracking1D1 Real-Time Octave

MeasurementsUK4 Microphone Adapter and Power

Supply1D2 Swept-Sine Measurements1D3 Curve Fit and Synthesis1D4 Arbitrary Waveform Source1C2 HP Instrument BASICAN2 Add 4-Mbytes MemoryUFC Add 8-Mbytes Memory

Note: Only one of option AN2 orUFC may be installed

UFF Add 1-Mbyte Nonvolatile RAM1F0 PC-style Keyboard1F1 German Keyboard1F2 Spanish Keyboard1F3 French Keyboard1F4 UK Keyboards1F5 Italian Keyboard1F6 Swedish KeyboardAX4 Rack Mount Without Handles100 Software Bundle 1D0-1D4, UFCUK5 Carrying Case (for shipping)0B1 Additional Manual Set0BU Additional HP Instrument

BASIC Manual Set0B3 Add Service Manual1BP Military Calibration (meets MIL

45662A)W30 Two Year Extended Service

Contract

To Upgrade Your HP 35670A

To add an option to your HP 35670A,order HP 35670U followed by theoption number. Options AY6, AN2,UFC and UFF must be installed byHewlett Packard. Option UE2 isavailable to upgrade instrumentfirmware to latest version, asappropriate.

HP 35670A Ordering Information

Accessories

DC Power Cables

The HP 35250A is a three meter cableterminated with lugs for connectingto most dc power sources. TheHP 35251A is a three meter cableterminated with an adaptor that plugsinto a cigarette lighter.

For Testing Control Systems

The HP 35280A summing junctionprovides convenient dc to 1 MHzsignal injection for most controlloops. Use the HP 35281A clip-ontransformer when it is not possible totemporarily open the loop, or use theHP 35282A signal injection trans-former when secondary voltages areup to 600 Vpk.

Physical Sensors

For a complete list of accessoriesfor this and other HP Dynamic SignalAnalyzers, please refer to theHP DSA Accessory Catalog(publication number 5091-9708E).

Instrument ModesFFT Analysis Histogram/TimeCorrelation Analysis Time CaptureMeasurementFrequency DomainFrequency Response Power SpectrumLinear Spectrum CoherenceCross Spectrum Power Spectral

DensityTime Domain (oscilloscope mode)Time Waveform AutocorrelationCross-Correlation Orbit DiagramAmplitude DomainHistogram, PDF, CDFTrace CoordinatesLinear Magnitude Unwrapped PhaseLog Magnitude Real PartdB Magnitude Imaginary PartGroup Delay Nyquist DiagramPhase PolarTrace UnitsY-axis Amplitude: combinations of units, unitvalue, calculated value, and unit formatdescribe y-axis amplitudeUnits: volts, g, meters/sec2, inches/sec2,meters/sec, inches/sec, meters, mils, inches,pascals, Kg, N, dyn, lb, user-defined EUsUnit Value: rms, peak, peak-to-peakCalculated Value: V, V2, V2/Hz, V/√—Hz, V2s/Hz(ESD)Unit Format: linear, dB’s with user selectabledB reference, dBm with user selectableimpedance.Y-Axis Phase: degrees, radiansX-Axis: hz, cpm, order, seconds, user-definedDisplay FormatsSingleQuadDual Upper/Lower TracesSmall Upper and Large LowerFront/Back Overlay TracesMeasurement StateBode DiagramWaterfall Display with Skew, -45 to 45 DegreesTrace Grids On/OffDisplay BlankingScreen SaverDisplay ScalingAutoscale Selectable ReferenceManual Scale Linear or Log X-AxisInput Range Tracking Y-Axis LogX & Y Scale Markers with Expand and ScrollMarker FunctionsIndividual Trace MarkersCoupled Multi-Trace MarkersAbsolute or Relative MarkerPeak SearchHarmonic MarkersBand MarkerSideband Power MarkersWaterfall MarkersTime Parameter MarkersFrequency Response Markers

Signal Averaging (FFT Mode)Average Types (1 to 9,999,999 avgerages)RMS Time ExponentialRMS Exponential Peak HoldTimeAveraging ControlsOverload RejectFast Averaging On/OffUpdate Rate SelectSelect Overlap Process PercentagePreview Time RecordMeasurement ControlStart MeasurementPause/Continue MeasurementTriggeringContinuous (Freerun)External (Analog or TTL Level)Internal Trigger from any ChannelSource Synchronized TriggerHP-IB TriggerArmed TriggersAutomatic/ManualRPM StepTime StepPre- and Post-Trigger Measurement DelayTachometer Input:±4 V or ±20 V range40 mv or 200 mV resolutionUp to 2048 pulses/revTach hold-off controlSource OutputsRandom Burst RandomPeriodic Chirp Burst ChirpPink Noise Fixed SineNote: Some source types are not available foruse in optional modes. See option descriptionfor details.Input ChannelsManual Range Anti-alias Filters On/OffUp-Only Auto Range AC or DC CouplingUp/Down Auto Range LED Half Range and

Overload IndicatorsFloating or Grounded A-Weight Filters On/OffTransducer Power Supplies(4 ma constant current)Frequency20 Spans from 195 mHz to 102.4 kHz (1 channelmode)20 Spans from 98 mHz to 51.2 kHz (2 channelmode)Digital zoom with 244 µHz resolution throughoutthe 102.4 kHz frequency bands.Resolution100, 200, 400, 800 and 1600 linesWindowsHann UniformFlat Top Force/ExponentialMath+,-,∗, / ConjugateMagnitude Real and ImaginarySquare Root FFT, FFT-1

LN EXP∗jω or /jω PSDDifferentiation A, B, and C weightingIntegration Constants K1thru K5

Functions F1 thru F5

Summary of Features on Standard Instrument

The following features are standardwith the HP 35670A:

Data subject to change.

Copyright © 1994, 1997 Hewlett-Packard Co.

Printed in U.S.A. 12/97

5966-3063E

MS-DOS® is a U.S. registered trademark of Microsoft Corporation.MATRIX X is a product of Integrated Systems Inc.Matlab is a product of The Math Works.

AnalysisLimit Test with Pass/FailData Table with Tabular ReadoutData EditingTime Capture FunctionsCapture transient events for repeated analysisin FFT, octave, order, histogram, or correlationmodes (except swept-sine). Time-captureddata may be saved to internal or external disk,or transferred over HP-IB. Zoom on captureddata for detailed narrowband analysis. Up to750K samples of data can be saved in thestandard unit.Data Storage FunctionsBuilt-in 3.5 in., 1.44-Mbyte flexible disk alsosupports 720-KByte disks, and 128-KbyteNVRAM disk. Both MS-DOS® and HP-LIFformats are available. Data can be formatted aseither ASCII or Binary (SDF). The HP 35670Aprovides storage and recall from the internaldisk, internal RAM disk, internal NVRAM disk, orexternal HP-IB disk for any of the followinginformation:Instrument Setup States Trace DataUser-Math Limit DataTime Capture Buffers HP Instrument BASICWaterfall Display Data ProgramsData Tables Curve Fit/Synthesis

TablesInterfacesHP-IB (IEEE-488.1 and 488.2)ParallelRS-232C SerialHard-Copy OutputTo Serial or Parallel HP-GL PlottersTo Raster PrintersTo Serial or Parallel HP-GL PrintersTo Disk File (Supports Raster Printer,HP-GL Plotter, and HP-GL Printer)Time StampHP-IB CapabilitiesListener/Talker (Direct control of plotters,printers, disk drives)Conforms to IEEE 488.1/488.2Conforms to SCPI 1992Controller with HP Instrument Basic optionStandard Data Format (SDF) UtilitiesExchange data between virtually allHP Dynamic Signal AnalyzersEasy data transfer to spreadsheetsData transfer to MATRIXX and MatlabSDF utilities run in an external PCCalibration & MemorySingle or Automatic CalibrationBuilt-In Diagnostics & Service TestsNonvolatile Clock with Time/DateTime/Date Stamp on Plots and Saved Data FilesOnline HelpAccess to Topics via Keyboard or IndexFanOn/Off