The 4mA current source for the IEPE/ICP sensor, AC or DC coupling
and gains of 1 and 10 are all individually programmable for each input.
In addition to the potential range of measurement magnitudes, other issues differentiating sensing methods include accuracy, linearity, drift over temperature, bandwidth, isolation, DC coupling
, size and cost.
Compatible with any standard BNC type scope probes, input ranges are 30, 3, or 0.3V with an x1 probe, and 300, 30, or 3V with an x10 probe, with AC or DC coupling
. A synchronization feature permits two or more USBScope50s to be plugged together to form a dual/multi channel device.
Other features of the devices include low group delay and RMS jitter, a single supply voltage of -5.2 VDC, DC offset correction, power consumption of 500 mW (iT3011) and 625 mW (iT3018), AC and DC coupling
at both input and output, and bias current of 73 mA (iT3011) and 125 mA (iT3018).
A star configuration DBM has an inherent DC coupling
structure and may have an advantage, considering the complexity of the IF decoupling in the realization of the ring configuration.
Each amplifier can be individually configured to allow the selection of several different input ranges (from [+ or -]50 mV up to [+ or -]10 V), 50-[OMEGA] or 1-M[OMEGA] input impedance and AC or DC coupling
. Data is stored in an internal 1 GB (512 MSamples) memory and can be read out via Ethernet for processing and analysis.
The PXIe-9529 provides flexible input ranges up to [+ or -]10 V or [+ or -]1 V, software-selectable AC or DC coupling
, and both differential and pseudo-differential input configuration, with up to [+ or -] 42.4-V over-voltage protection for positive and negative inputs in both configurations.
Properties such as gain stability and matching are covered, and one-, two- and three-stage amplifiers with internal DC coupling
and feedback often found in ICs, are described.
IEPE conditioning is built into the analog circuitry of the DT9839, providing an excitation current source and AC or DC coupling
Additional features include support for IHPE (Integrated Electronic Piezoelectric) inputs, including use of a 2 mA current source and AC or DC coupling
, to interface with an accelerometer and microphone; an input range of [+ or -]10 V with software selectable gains of 1 and 10 for an effective input range of [+ or -]10 V and [+ or -]1 V; throughput rates of up to 105.4 kHz per channel; and one 24-bit D/A channel with sampling rate up to 96 kHz.