HP 35670A
Dynamic Signal
Analyzer
Product Overview
The HP 35670A
shown with Four Channels
(option AY6)
Versatile two- or
four-channel
high-performance
FFT-based spectrum/
network analyzer
µµ
122
µHz to 102.4 kHz
µµ
16-bit ADC
Frequency Range 102.4 kHz 1 channel
Dynamic Range 90 dB typical
Accuracy ±0.15 dB
Channel Match ±0.04 dB and
Real-time Bandwidth 25.6 kHz/1 channel
Resolution 100, 200, 400 & 800 lines
Time Capture 0.8 to 5 Msamples
Source Types Random, Burst random,
51.2 kHz 2 channel
25.6 kHz 4 channel
±0.5 degrees
(option UFC)
Periodic chirp, Burst
chirp, Pink noise, Sine,
Swept-Sine (option1D2),
Arbitrary (option 1D4)
The HP 35670A is a portable two- or
four-channel dynamic signal analyzer
with the versatility to be several
instruments at once. Rugged and
portable, it’s ideal for field work. Yet
it has the performance and functionality required for demanding R&D
applications. Optional features
optimize the instrument for troubleshooting mechanical vibration and
noise problems, characterizing
control systems, or general spectrum
and network analysis.
Take the HP 35670A
where it’s needed!
Whether you’re moving an instrument
around the world or around the lab,
portability is a real benefit. Small
enough to fit under an airplane seat,
the HP 35670A goes where it’s
needed. But there’s more to portability than size. Like a nominal 12- to
28-volt dc power input and selfcontained features that do not require
external hardware, such as built-in
piezoelectric integrated circuit power
supply, analog trigger and tachometer
inputs, and optional computed order
tracking.
Versatile enough to be
your only instrument for
low frequency analysis
With the HP 35670A, you carry
several instruments into the field in
one package. Frequency, time, and
amplitude domain analysis are all
available in the standard instrument.
Build on that capability with options
that either add new measurement
capability or enhance all measurement modes.
AY6 Add Two Channels (Four Total)
1D0 Computed Order Tracking
1D1 Real-Time Octave
Measurements
UK4 Microphone Adapter and
Power Supply
1D2 Swept-Sine Measurements
1D3 Curve Fit and Synthesis
1D4 Arbitrary Waveform Source
1C2 HP Instrument BASIC
UFF Add 1-Mbyte NVRAM
AN2 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 your
bench-top analyzer in a portable
instrument.
Ease-of-use
Portability, versatility, and performance are valued attributes, but to be
really valuable an instrument must
also be easy to use. The HP 35670A
has a friendly front panel, plus online
help that’s always available to answer
your questions. An interactive
measurement state lets you configure
the instrument setup from a single
display.
HP 35670A Dynamic Signal Analyzer
Versatile
Measurement Modes
Standard and optional
measurement modes include:
• FFT Analysis
• Real-Time Octave Analysis
HP Instrument BASIC
(Option 1C2)
Develop a custom userinterface, integrate
several instruments and
peripherals into a system
using the HP 35670A as
the system controller,
or simply automate
measurements.
Shown with
option AY6 Add Two
Channels
(option 1D1)
• Order Analysis (option 1D0)
• Swept-Sine (option 1D2)
• Correlation Analysis
• Histogram Analysis
• Time Capture
All measurement options
may be retrofitted.
RPM Display
Read RPM in any
measurement mode
Powerful Markers
Extract information
from measurement
data with trace and
special markers:
• Individual Trace
• Coupled Trace
• Absolute or Relative
• Peak Search
• Harmonic
• Band
• Sideband Power
• Waterfall
• Time Parameter
• Frequency and
Damping
Built-In 3.5 inch
Flexible Disk Drive
Store instrument
states, programs, time
captured data,
waterfall data, trace
data, limits, math
functions, data tables,
and curve fit/synthesis
tables.
Supported disk formats
are HP-LIF and
MS-DOS. Internal RAM
may also be formatted
as storage disk.
Online Help
Applications
oriented help
is just a few
keystrokes away.
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 mA
constant current
Large 6.9 inch
(17.5 cm) display
Display area is not
compromised by
portability
power supply
Precision
Measurements
• 16-bit ADC
• ±0.15 dB spectrum
ampltude accuracy
• ±0.04 dB, ±0.5
degrees channel
match (full scale)
• 90 dB dynamic
range (typical)
• 130 dB dynamic
range with sweptsine (option 1D2)
• Up/Down autorange
• Up only autorange
2
Math Functions
Powerful math and
data editing functions
to quickly modify
measurement results.
(Curve fit and
frequency response
synthesis available
with option 1D3.)
Source Types
• Random Noise
• Burst Random
Noise
• Periodic Chirp
• Burst Chirp
• Pink Noise
• Fixed Sine
• Arbitrary
Waveform
Source
(Option 1D4)
• Swept-Sine
Source
(Option 1D2)
Note: The
source is
located on
the front panel
of a standard
two-channel
HP 35670A.
HP-IB Connector
Integrate the
HP 35670A with
other instruments
and peripherals for
system operation or
printing/plotting.
System controller
for HP-IB (IEEE-
488.1 and 488.2)
compatible
instrumentation via
HP Instrument
BASIC (option 1C2).
Provides direct
control of HP-IB
printers, plotters,
and HP SS80 disk
drives.
Serial Port
Plot to HP-GL
plotters or print to
HP-GL and raster
printers.
Parallel Port
Plot to HP-GL plotters
or print to HP-GL and
raster printers.
DC Power
Accepts 12 to 28 volts
dc (nominal). Use the
HP 35250A power
cable for DC power
source connection, or
the HP 35251A power
cable with cigarettelighter adapter.
Low Noise Fan
Fan may be turned
off for acoustic
applications.
Running speed
depends on
ambient
temperature.
External Trigger
(42 Volt Peak Max)
No external signal
conditioning
hardware required.
Triggers on selected
level between
±10 volts.
Keyboard
Use a standard PC
keyboard to title data,
edit HP Instrument
BASIC programs,
or to operate the
instrument.
Tachometer
(42 Volt Peak Max)
No external signal
conditioning hardware
required. Reads
frequency (RPM) on
selected levels
between ±20 volts.
Power Select
Switch between
ac and dc power
sources without
interrupting
instrument
operation.
External Monitor
Drive a multisync
monitor for remote
viewing by large
groups.
3
AC Power
Universal power
supply will
operate with any
combination of
voltage between
100 and 240 VAC
and line
frequency
between 47 and
440 Hz. The
maximum power
requirement is
350 VA.
Spectrum Analysis
FFT-based spectrum analyzers, such
as the HP 35670A, are ideal for
measuring the spectra of lowfrequency signals like speech or
mechanical vibration. Transient
components, usually missed with
swept-frequency analyzers, are easily
measured and displayed at speeds
fast enough to follow trends. The
HP 35670A has both the performance
and features required to take full
advantage of this technology.
16-Bits for High Performance
With a 16-bit ADC (90 dB typical
dynamic range) and a real-time
bandwidth of 25.6 kHz, you can be
sure nothing will be missed. Resolve
signals using 100 to 1600 lines
resolution, or for really close-in
analysis, use frequency zoom to
resolve signals with up to 61 µHz
resolution. Use time or RPM arming
to develop waterfalls of sequential
vibration spectra for trend analysis or
for an overview of device vibration.
Averaging
Various averaging modes let you
further refine spectrum analysis
measurements. Time averaging
extracts repetitive signals out of the
noise while rms averaging reduces
the noise to its mean value. Exponential averaging, available for both time
and rms averaging, is useful for
reducing the noise while following
changing signals—tracking the
resonance shifts in a fatiguing
structure for example.
Power and Linear Spectrums
Match your spectrum measurement
mode to the signal being tested. Use
linear spectrum analysis to measure
both the amplitude and phase of
periodic signals such as the spectra of
rotating machinery. Power spectrum
analysis is provided for averaging
nonrepetitive signals.
Two spectrums
of road induced
vibration measured
at different speeds
are compared using
the front/back
mode of the
HP 35670A.
4
Time Domain
Use your spectrum analyzer as a lowfrequency oscilloscope or view
signals in the time and frequency
domains simultaneously. (Note: antialias filters can be switched off.)
Special markers for time-domain data
facilitate extraction of key control
system performance parameters:
overshoot, rise time, setting time, and
delay time.
Data Table
Use a tabular format to keep track
of key frequencies in the spectra of
rotating machinery. The amplitude
and frequency of the signal and a
16-character entry label field are
listed for each selected point.
Automatic Units Conversion
Display vibration data in the units
of your choice. Select g, m/sec
2
, m/s, in/s, m, mil, inch,
in/sec
Kg, lb, N, dyn, or pascals as appropri-
ate for your application. The instrument automatically converts frequency-domain data from specified
input transducer units to the units
you select for display. For example,
accelerometer data is automatically
converted and displayed as mils when
mils are selected. Of course, dB, dBV,
dBm and volts are available for
electrical applications.
2
,
Harmonic markers
are used to
calculate the THD
of a signal without
including the
effects of noise.
Measurement
results at key
frequencies can
be labeled and
listed using data
table.
Simultaneous
display of
frequency
and time domain
data facilitates
analysis of gear
mesh vibration.
Markers
Markers streamline analysis by
helping you select and display specific
data. Marker functions include marker
to peak, next right peak, and coupled
markers for selecting points in
multiple data displays. Markers
readouts are absolute or relative to
your selected reference.
Special Markers
Three special marker functions
facilitate analysis of your spectral
data. Sideband markers aid analysis
of modulation signals. Use this
function to quickly locate sidebands
in the complicated spectra of rotating
machines. A band-power marker reads
the total power in a selected band of
frequencies and a total harmonic
distortion marker lets you calculate
total harmonic distortion without
including the effects of noise.
5
Loading...