Service manual

10
ANSI S1.11-1986
All octave filters comply with filter
shape standards ANSI S1.11-1986
(Order 3, type 1-D), DIN 45651, and
IEC 225-1966. An 80 dB dynamic
range for the audio spectrum pro vides
the performance required by ac ous ti-
cians. Switchable analog A-weighting
filters in the input channels comply
fully with both ANSI S1.4-1983 and
IEC 651-1979 Type 0.
Advanced analysis
Use waterfall displays of octave data
for an overview of device noise versus
time or RPM. Display in di vid u al
fre quen cy bands as a function of
RPM or time using the slice marker
function. Al ter na tive ly, use trace
markers to select individual traces
for display.
A pink noise source is available for
testing electro-acoustic devices.
Sound level meter
mea surements
Peak hold, impulse, fast, slow, and
L
eq
are all provided with optional
real-time octave measurements.
All measurements conform to
IEC 651-1979 Type 0 – Impulse.
Real-Time Octave Measurements (Option 1D1)
Microphone Adapter and Power Supply (Option UK4)
Real-time 1/3-octave
mea sure ments at
frequencies up to
40 kHz.
This waterfall display
of a fl yover test can
be analyzed trace-by-
trace or by selecting
time slices along the
z-axis.
Agilent 35670A with
Option UK4 mi cro phone
adapter and power supply.
Real-time third octave to 40 kHz
ANSI S1.11-1986 fi lter shapes
A-weighted overall SPL
RPM or time-triggered waterfalls
Elim i nate the expense and in con ve-
nience of multiple instruments in the
field. With optional real-time octave
analysis, and the optional mi cro phone
adapter and power supply, you have
a complete real-time octave analyzer
added to your 35670A at a fraction
of the cost of a second instrument.
Now you can carry both your FFT and
real-time octave analyzers to the job
site in the same hand.
Real-time 1/3-octave to 40 kHz
on one channel
With two input channels of 1/3-
octave real-time measurements at
fre quen cies up to 20 kHz, you get all
of the in for ma tion you’ll ever need
to understand the noise per for mance
of your product. No mis in ter pret ed
measurements because transient
components were missed. When
the frequency range re quire ment is
10 kHz or less, use four channels to
char ac ter ize spatial variations. For
those exceptional circumstances, use
1/3-octave res o lu tion at frequencies
up to 40 kHz on a single channel.
Res o lu tions of 1/1- and 1/12-octave
are also available.
Overall sound pressure level and
A-weighted sound pressure level can
be displayed with the octave bands
individually, together, or not at all.
A fan-off mode lets you use the
in stru ment in the sound field being
measured.