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Input Sampling: Internal: 65,536 kHz. Exter-
I
nal: Max. 67kHz. AID-conversion: 12 bit.
Quantization error: Max. ± 1/2 LSB
Calibration: User-defined In engineering
units U, or In volts
AVERAGING:
Exponential: The number of averages Indi-
cated In the measurement setup determines
the effective averaging time
Linear: Equal weighting. Stops on reaching
the selected number of averages. A true av-
erage Is always displayed and the number-of
averages Is Indicated on the display
Calibration Annotation: V/V, V/unlt, V/Pa,
V/m/s
2
,
V/m/s, V/m, V/N, V/g, Vlln/s, V/mll,
unlt/V
ANALYSIS CHARACTERISnCS
Maaaurement Moclea
Ch. A Spectrum Averaging
Ch. B Spectrum Averaging
Dual Spectrum Averaging
Ch. A Spectrum Averaging Zero Pad
Ch. B Spectrum Averaging Zero Pad
Dual Spectrum Averaging Zero Pad
Dual Signal Enhancement
Dual Amplitude Probability
Frequency Range: 0 to 25,6 kHz. 15 Frequen-
cy spans from 1 ,56 Hz to 25,6 kHz. Digital
zoom giving resolution from 1,95 mHz to
32Hz anywhere In the frequency range, cor-
responding to zoom factors from 2 to 16 384
In a binary sequence
ANALYSIS PARAMETERS:
Reaolution: Samples In time functions: 2048
for each channel. In Zero Pad mode: 1024 for
each channel. Resolution elements In fre-
quency functions: 801. Amplitude classes In
Probability: 512
Weighting: Rectangular, Hanning, Transient
or Exponential selectable Independently on
each channel. Transient and Exponential win-
dow with selectable position and length
Real Time Frequency Range: >5kHz In dual
spectrum averaging mode> 10kHz In single
spectrum averaging mode
TRIGGER:
Trigger Input: Free run, Internal on channel A
or B before or after digital low-pass filtering,
external, synchronous with the pseudo ran-
dom noise sequence, or manual
Trigger Slope: Positive or negative
Trigger Level: Adjustable In 199 steps across
the Input voltage range
Delay: Trig -
A or Trig - B: delay between
trigger and start of channel A or B set In
seconds from - T to 9999 s. Resolution: aT
Ch. A - B:
Delay.
between start of channel A
and channel B set In seconds from 0 to 9999 s.
Resolution:
.:1
T
ANALYSIS PARAMETERS
Frequency
Record
Peak: (Single channel only), the maximum
level occurlng In each channel Is held
Number of Averagea: 1 through 32767. Any
Integer
OVerlap: 0%, 50%, 75%, or maximum
Manual Accept: Data Is accepted In the aver-
age under manual control
OVerload Reject: Any datablock related to
overloaded data Is rejected from an average
DISPLAY:
Type: Built-In 12,. TV raster scan monitor
Picture Reaolution: 290 x 401 or 290 x 512
points
.
Scale Linea: Horizontal scale lines and x-
axls check marks are generated electronical-
ly directly on the screen to avoid parallax
errors
Diaplay Formate: Single or dual trace. Any
trace In a dual display can be displayed In a
single trace full screen format or In a single
trace format with the measurement setup.
The display setup and data source are Inde-
pendently selectable for upper and lower
trace
Annotation: Identifies each trace with display
setup label, measurement setup label, display
setup parameters, selected data source num-
ber of averages performed, overload and
overlap status, and cursor settings and
values
Text: Two text strings each containing max.
100 characters of
alphanumerl
c text can be
entered. Either of the text strings can be
displayed
FUNCTIONS CALCULATED AND
DISPLAYED:
For no. of datapolnts calculated and dis-
played In each measurement mode, see Table
below. All the Indicated functions In each
measurement mode are available without
changing mode or rerunning data
Spectra: Linear Spectrum, RMS Spectrum,
Power Spectrum, Power Spectral Density, or
Energy Spectral Density
Hilbert Tranalorm: Can be applied on: Time,
Enhanced Time, Autocorrelation, Cross Cor-
relation, Impulse Response, and Cepstrum
FUNCnON
Time
Centre
Time
Frequency
Frequency
Time A vs. B
Span
Re•olutlon
Length
Reaolutlon
•etting
Enhanced Time
aF
T
aT
reaolution
Enhanced Time A vs. B
Probability Density
Probability Distribution
25.6kHz
32Hz
31.3ms
15.3,.,.s
Instantaneous Spectrum
12.8kHz
16Hz
62.5ms
30.5,.,.s
256Hz
Enhanced Spectrum
6.4kHz
8Hz
125ms
61,0,.,.s
128Hz
Autospectrum
3.2kHz
4Hz
250ms
122,.,.s
64Hz
Cross Spectrum
1.6kHz
2Hz
500ms
244,.,.s
32Hz
Freq. Response H1o H
2
800Hz
1Hz
1s
488,.,.s
16Hz
1/Freq. Response H
1 ,
H
2
400Hz
500mHz
2s
977,.,.s
8Hz
Coherence
200Hz
250mHz
4s
1.95ms
4Hz
Signal to Noise Ratio
100Hz
125mHz
as
3.91 ms
2Hz
Coherent Output Power
50Hz
62.5mHz
16s
7.81 ms
1Hz
Non-coh. Output Power
25Hz
31.3mHz
32s
15.6ms
500mHz
Autocorrelation
12.5Hz
15.6mHz
64s
31.3ms
250mHz
Cross Correlation
6.25Hz
7.81 mHz
128s
62.5ms
125mHz
Impulse Response
3.13Hz
3.91 mHz
256s
125ms
62.5mHz
Sound Intensity
1.56Hz
1.95mHz
512s
250ms
31.3mHz
Cepstrum
Littered Spectrum
Coordinatea: Real, Imaginary, Magnitude,
Phase, Nyquist (Imaginary
v~.
Real) Nichols
(Log. Magnitude
vs.
Phase), or Orbit (Time A
vs. Time B)
Y-Axla: Lin: Full scale can be set to any num-
ber from 1E-24 to 1E24. Units: V, V
2 ,
V
2
/Hz,
V
2
s/Hz, W/m
2 ,
U, U
2 ,
u2/Hz, U
2
s/Hz. Log: Full
8cale: -500 to + 500 dB In 0,1 dB steps.
Ranges: 10, 20, 40, 80, 160dB. Reference:
Can be set to any number from 1 OOE-15 to
999E9.
Amplitude
Probability:
%,
%/V,
%/RMS. Phase: -200 to
+
200 Deg.
X-Axia: Spectrum: Lin: 801 lines. Log: 2 de-
cades, 793 lines. Time: 2048 samples. Ampli-
tude Probability: Minus to plus maximum
peak Input voltage. 32, 64, 128, 256, or 512
amplitude classes. X-Axls gain to obtain 512,
1024, 2048 or 4096 points for time and 401 or
801 lines for spectrum. X-start selectable In 1
element
CURSORS:
Intensified column movable either coritlnous-
ly or In single steps. Cursors on upper and
lower trace can be Individually or synchro-
nously controlled
Curaor Type•: Main Cursor, Harmonic Cur-
sor, Sideband Cursor, Delta Cursor, Mask
.
Cursor, Reference Cursor
Curaor Reading•:
·
For two channel measure-
ments the time-reading Includes the selec-
table delay between ch. A and ch. B. Both fre-
quency and time can be read In engineering
units e.g. rpm, orders or meters using "flexi-
ble" axis
Cur•or
.:1
Ruding•: at or
.:1
f values between
harmonics, sidebands, delta cursors, or ref-
erence cursor
Special Reading•: Total power, power In del-
ta cursor band, delta power/total power, dif-
ference between amplitudes at the reference
and main cursor, element number
STORED FUNCTIONS:
Single Spectrum Averaging
2048 sample Time Function
1024 line Autospectrum
Single Spectrum Averaging Zero Pad:
1024 sample Time Function
1024 line Autospectrum
"
Dual Spectrum Averaging:
2 x 2048 sample Time function
2 x 1024 line Autospectrum
1 x 1024 line Cross Spectrum
Dual Spectrum Averaging Zero Pad:
2 x 1024 sample Time Function
2 x 1024 line Autospectrum
1 x 1024 line Cross Spectrum
Single ch. Dual Ch.
Signal
Amp.
Spectrum Spectrum Enhance-
Averaging Averaging ment
Prob.
1 X 2048
2 X 2048
2 X 2048 2 X 2048
2 X 2048
2 X 2048
2 X 2048
2 X 2048
2 X 2048
2 X 512
2 X 512
1 X 801
2 X 801
2 X 801
2 X 801
2 X 801
1 X 801
2 X 801
1 X 801
1 X 801
1 X 801
1 X 801
1
X
801
1 X 801
1 X 801
1 X 801
1
X
801
1
X
1024
2
X
1024
2
X
2048
1
X
2048
1
X
4096
1
X
2048
1
X
4096
1 X 800
1 X 1024
2 X 1024
1 X 801
2X 801
In Zero Pad mode the record length Is x 0.5
In Zero Pad mode the no. of datapolnts Is x 0,5 for Time and Time A vs. B
In Zoom the Time Resolution aT Is x 2
In Zoom the no. of datapolnts Is x 0,5 for time Time A vs. B, Enhanced
Time, and Time A vs. B. H
2
is not measured In Signal Enhancement
7
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