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The 2015-P Audio Analyzing Digital Multimeter and the 2015 Total Harmonic Distortion Multimeter combine audio band quality measurements and analysis with a full-function 6½-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 instrument. The 2015-P offers additional processing capacity for frequency spectrum analysis.
Key Features
• THD, THD+Noise, and SINAD measurements
• 20 Hz-20 kHz sine wave generator
• Fast frequency sweeps • 2015-P identifies peak spectral components
• Sine wave generator maximum amplitude: 4 Vrms single-ended or 8 Vrms differential output
• Individual harmonic magnitude measurements
• 5 standard audio shaping filters
• 13 DMM functions (6½ digits)
• GPIB and RS-232 interfaces
Features |
Benefits |
| Frequency domain analysis in conventional time domain instruments | Offers broad range of measurements in one compact, half-rack instrument |
|
Dual output audio band sine wave source |
Generate stimulus signals with one output; the second one (inverse of the first output) simplifies testing differential input circuits for common mode or noise cancellation performance |
| Fast frequency sweeps | Characterize audio-band circuitry quickly in production test systems |
| Up to 64 harmonic magnitudes can be included in the distortion measurement | Optimize accuracy, speed, and complexity for a specific test by programming the number of harmonics to be included in a computation |
| 5 standard audio shaping filters | Filter out electromechanical noise on the production floor or simulate other types of system transmission characteristics |
| 13 DMM functions (6½ digits) | Minimize added equipment costs when configuring test setups |
Frequency Domain Distortion Analysis For applications such as assessing non-linear distortion in components, devices, and systems, DSP-based processing allows the 2015 and 2015-P to provide frequency domain analysis in conventional time domain instruments. They can measure Total Harmonic Distortion (THD) over the complete 20 Hz to 20 kHz audio band. They also measure over a wide input range (up to 750 Vrms) and have low residual distortion (-87 dB). The THD reading can be expressed either in decibels or as a percentage. In addition to THD, the 2015 and 2015-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.
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