Atec Keithley-2015-16 - Manual

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(U.S. only)
A G R E A T E R M E A S U R E O F C O N F I D E N C E
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2015, 2015-P, 6 1 ⁄
2
-Digit THD Multimeters
2016, 2016-P 6 1 ⁄
2
-Digit Audio Analyzing Multimeters
The Models 2015-P and 2016-P Audio Analyzing
Digital Multimeters and the Models 2015 and 2016
Total Harmonic Distortion Multimeters combine
audio band quality measurements and analysis with
a full-function 6
1 ⁄
2
-digit DMM. Test engineers can
make a broad range of voltage, resistance, current,
frequency, and distortion measurements, all with
the same compact, half-rack measurement instru-
ment. The Model 2016 and 2016-P have twice the
sine wave generator output of the Model 2015 for
applications that require test signals greater than
8Vrms. The Model 2015-P and 2016-P offer addi-
tional processing capacity for frequency spectrum
analysis.
Frequency Domain Distortion Analysis
For applications such as assessing non-linear distor-
tion in components, devices, and systems, DSP-
based processing allows the Models 2015-P, 2015,
2016, and 2016-P to provide frequency domain
analysis in conventional time domain instruments.
They can measure Total Harmonic Distortion (THD) over the complete 20Hz to 20kHz audio band.
They also measure over a wide input range (up to 750Vrms) and have low residual distortion
(–87dB). The THD reading can be expressed either in decibels or as a percentage.
In addition to THD, the Models 2015, 2015-P, 2016, and 2016-P can compute THD+Noise and Signal-
to-Noise plus Distortion (SINAD). For analyses in which the individual harmonics are the criteria of
greatest interest, the instruments can report any of the (up to 64) harmonic magnitudes that can be
included in the distortion measurements. The user can program the actual number of harmonics to
be included in a computation, so accuracy, speed, and complexity can be optimized for a specific
application. (See Figure 1.)
APPLICATIONS
• Wireless communication device
audio quality testing
• Component linearity testing
• Lighting and ballast THD limit
conformance testing
• Telephone and automotive
speaker testing
• THD, THD+Noise, and SINAD
measurements
• 20Hz–20kHz sine wave
generator
• Fast frequency sweeps
• 2015-P, 2016-P: Identifies peak
spectral components
• 2015, 2015-P: 4Vrms single-
ended or 8Vrms differential
output
• 2016, 2016-P: 9.5Vrms single-
ended or 19Vrms differential
output
• Individual harmonic magnitude
measurements
• 5 standard audio shaping filters
• 13 DMM functions (6 1 ⁄
2
digits)
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
Harmonic
Ratio to
Fundamental
Figure 1. Frequency Spectrum of 1kHz Square Wave
Figure 1 shows a plot of a square wave’s harmonics (frequency components) computed and
transmitted to a personal computer by the Model 2015 or 2016. A square wave’s spectral content
consists of only odd harmonics whose magnitudes are (1/harmonic number × the magnitude of
the fundamental). For example, the magnitude of the third harmonic is
1 ⁄
3
the magnitude of the
fundamental.