- 6 1/2-digit resolution
- Rear input locking
- THD, THD+Noise, and SINAD measurements
- 20Hz-20kHz sine wave generator
- Fast frequency sweeps
- 4Vrms single-ended or 8Vrms differential output
- Individual harmonic magnitude measurements
- 5 standard audio shaping filters
- 13 DMM functions
- GPIB and RS-232 interfaces
- Wireless communication device audio quality testing
- Component linearity testing
- Lighting and ballast THD limit conformance testing
- Telephone and automotive speaker testing
The Keithley 2015/R 6 1/2-Digit Total Harmonic Distortion Digital Multimeter w/Rear Input Locking combines 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 instrument. The 2015/R offers additional processing capacity for frequency spectrum analysis.
Frequency Domain Distortion Analysis
For applications such as assessing non-linear distortion in components, devices, and systems, DSP-based processing allows the Models 2015/R to provide frequency domain analysis in conventional time domain instruments. It can measure Total Harmonic Distortion (THD) over the complete 20Hz to 20kHz audio band. It also measures 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 2015/R 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.
Optimized for Production Testing
The Model 2015/R 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 reducing the number of tests or reducing the measurements in each test. With this instrument, which is 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 2015/R includes an internal audio band sine wave source for generating 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.
Wide Selection of Audio Filters
Five industry-standard bandpass filters are provided for shaping the input signal for audio and telecommunication applications. Available filters include the CCITT weighting filter, CCIR filter, C-message filter, CCIR/ARM filter, and "A" weighting filter. The 2015/R provides programmable, high cutoff (low pass) and low cutoff (high pass) filters. Furthermore, the two filters can be implemented together to form a bandpass filter. The programmable filters can be used to filter out noise generated by electromechanical machinery on the production floor or to simulate other types of system transmission characteristics.
Broad Measurement Flexibility
In addition to their THD, THD+Noise, SINAD, and individual harmonic measurement capabilities, the instruments provide a comprehensive set of DMM functions, including DCV, ACV, DCI, ACI, 2WW, 4WW, temperature, frequency, period, dB, dBm, and continuity measurements, as well as diode testing. This multi-functional design minimizes added equipment costs when configuring test setups.
Wide Band or Narrow Band Noise Measurements
The 2015/R is capable of measuring both wide band noise and narrow band noise. Alternatively, its DSP (Digital Signal Processing) capabilities allow users to make frequency domain measurements of RMS voltage noise over the 20Hz - 20kHz frequency audio band, or a narrow portion of the band. Furthermore, noise measurements can be extracted in the presence of a stimulus signal for fast signal-to-noise computations.
|8501-2||Keithley 8501-2 2m Micro-DIN-Male-to-Micro-DIN-Male Trigger Link Cable||
|8503.||Keithley 8503. 1m DIN Male-to-BNC Male Trigger Link Cable||
|4288-1||Keithley 4288-1 Single Fixed Rack Mount Kit||
|4288-2||Keithley 4288-2 Dual Fixed Rack Mount Kit for Models 2000, 2700, and 6487||
|KPCI-488LPA||Keithley KPCI-488LPA IEEE-488.2 Interface Module for PCI Buses||
|KUSB-488B||Keithley KUSB-488B IEEE-488.2 USB-to-GPIB Interface Adapter for USB Ports||