PXIe-4138 National Instruments PXI Source Measure Unit
The PXIe - 4138 National Instruments PXI Source Measure Unit is a high - performance instrument module designed for precise source and measurement of electrical signals in PXI - based test and measurement systems. Here is a detailed introduction:
- Dual - Channel Operation: It features two independent channels, enabling simultaneous source and measurement operations on two separate signals or devices. Each channel can be configured and controlled independently, providing flexibility for various test scenarios.
- Wide Dynamic Range: The unit can source and measure voltages and currents over a wide dynamic range. It can handle low - level signals with high resolution and accuracy, as well as high - voltage and high - current signals, making it suitable for a variety of applications, from characterizing small - signal electronic components to testing high - power devices.
- Precise Measurement Capability: It offers high - precision measurement of voltage, current, and resistance. With a built - in high - resolution analog - to - digital converter (ADC), it can achieve accurate measurements with low noise and high linearity. The measurement accuracy can reach ±0.05% of the full - scale range or better, depending on the specific measurement range and conditions.
- Arbitrary Waveform Generation: In addition to providing DC source and measurement capabilities, the PXIe - 4138 can generate arbitrary waveforms. Users can define custom waveforms through software, allowing for more complex and flexible testing of electronic devices and circuits that require non - sinusoidal or time - varying input signals.
- Programmable Output Impedance: The output impedance of each channel can be programmed, which is useful for matching the output impedance of the source to the load impedance in different test setups. This helps to optimize signal transfer and minimize reflections, ensuring accurate and reliable measurements.
- Built - in Signal Conditioning: It includes built - in signal conditioning circuitry, such as filters and amplifiers, to improve the quality of the input and output signals. The filters can be used to suppress high - frequency noise, while the amplifiers can boost weak signals to a more measurable level.
- Channels: 2 independent channels.
- Voltage Source Range: Typically, it can source voltages from a few millivolts to several tens of volts, with multiple selectable ranges, such as ±10 V, ±20 V, etc.
- Current Source Range: The current source range can vary from microamps to several amps, for example, ±100 μA, ±1 mA, ±10 mA, up to ±1 A or more.
- Measurement Accuracy: Voltage measurement accuracy is within ±0.05% of the full - scale range, and current measurement accuracy is also very high, typically better than ±0.1% of the measured value.
- Sampling Rate: It can sample signals at a high rate, usually up to several hundred kilosamples per second or more, depending on the specific configuration and mode of operation.
- Output Impedance: Programmable output impedance values, such as 50 Ω, 100 Ω, 500 Ω, 1 kΩ, etc., are available to match different load requirements.
