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Digit thd multimeters, Digit audio analyzing multimeters, Ordering information – Atec Keithley-2015-16 User Manual

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1.888.KEITHLEY

(U.S. only)

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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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