Atec Keithley-2015-16 - Manual (Page 2)

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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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Optimized for Production Testing
The Models 2015, 2015-P, 2016, and 2016-P can perform fast frequency sweeps for characterizing
audio-band circuitry in production test systems. For example, the instruments can execute a single
sweep of 30 frequencies and transmit both rms voltage readings and THD readings to a computer in
only 1.1 seconds. With that data, a complete frequency response analysis and a harmonic distortion
vs. frequency analysis can be performed in a very short time. Thus high speed testing of the audio
performance of a high volume device such as a cellular telephone can be performed without reduc-
ing the number of tests or reducing the measurements in each test. With these instruments, which
are optimized for production testing, test engineers can lower test times, in comparison to test
speeds achievable with general purpose audio analyzers, without sacrificing production test quality.
Dual Output Source
The Models 2015, 2015-P, 2016, and 2016-P include an internal audio band sine wave source for gen-
erating stimulus signals. A second output, the inverse of the first output, is also available, simplifying
the testing of differential input circuits for common mode or noise cancellation performance.
Device Under Test
Input
Transducer
Model 2015, 2015-P, 2016, or 2016-P
Signal
Input
Source
Output
2015 MULTIMETER
Output
Transducer
Figure 2. Total Harmonic Distortion
Analysis and Frequency
Response of a Portable Wireless
Telecommunication Device
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
100 1000 10000
Frequency (Hz)
Relative
Output
Level (dB)
THD:
Levels r elative to fundamental:
2nd harmonic
3rd harmonic
4th harmonic
Figure 3. THD and 2nd, 3rd, and 4th Harmonics as a Function of Frequency
–20
–15
–10
–5
0
5
10
100 1000 10000
Frequency (Hz)
Relative
Output
(dB)
Figure 4. Frequency Response
Figures 2, 3, and 4 demonstrate how the
Model 2015, 2015-P, 2016, or 2016-P can pro-
vide both time domain and frequency domain
measurements in a single test protocol. Figure
2
shows a sample test system schematic with
a telecommunication device in a loop back
mode test. The Audio Analyzing DMM’s source
provides a stimulus frequency sweep, and the
Audio Analyzing DMM measures the response
from the microphone circuit. Figure 3 shows
the resulting frequency domain analysis of the
THD and the first three harmonics as a func-
tion of frequency. Figure 4 shows the time
domain analysis of microphone circuit output
voltage as a function of frequency.
Ordering Information
2015 Total Harmonic
Distortion 6
1 ⁄
2
-Digit
Multimeter
2015-P Audio Analyzing DMM
2016
Total Harmonic
Distortion 6
1 ⁄
2
-Digit
DMM w/9V Source
Output
2016-P Audio Analyzing DMM
w/9V Source Output
These products are available
with an Extended Warranty.
Accessories Supplied
Model 1751 Safety Test Leads,
User Manual, Service Manual.
2015, 2015-P, 6 1 ⁄
2
-Digit THD Multimeters
2016, 2016-P 6 1 ⁄
2
-Digit Audio Analyzing Multimeters
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