The 2-channel OMB-DBK4 dynamic signal-input card enables OMB-LOGBOOK and OMB-DAQBOARD-2000 Series data acquisition systems to accommodate inputs from piezoelectric transducers, such as accelerometers or microphones, as well as from various other dynamic signal sources. Each OMB-DBK4 card is equipped with two BNC connectors and footprints for two user-installed Microdot connectors, permitting it to easily accommodate most transducer connections.
Architecture The OMB-DBK4 provides per-channel, constant current source outputs, programmable gain amplifiers, programmable anti-aliasing filters, and sample and hold amplifiers.
Specifications Channels: 2 Connectors: DB37 male, 1 BNC per channel, and footprints for one user-provided Microdot connector per channel Current Source: Output Impedance: >1.4 M . Compliance: 27 V Current Levels: 2 and 4 mA (jumper selectable) Input Impedance: 150 K . Input Ranges: ±50 mV, ±500 mV, and ±5 V FS; additional full scale ranges are available when combined with the OMB-LOGBOOK’s or OMB-DAQBOARD-2000 Series on-board programmable A/D ranges Coupling: AC and DC AC High-Pass Filters: Per-channel, 1-pole HPF with 10 Hz or 0.1 Hz cutoff, selectable via jumper Input Signal/Noise: >96 dB (BW=100 kHz) Amplitude Accuracy: ±0.5 dB passband center Low-Pass Filter: Software selectable, 12-pole Butterworth filter, with cutoff frequencies of 18 kHz, 9 kHz, 4.5 kHz, 2.25 kHz, 1.125 kHz, 562.5 Hz, 281.2 Hz, and 141.6 Hz; each channel can be configured for a different cutoff frequency Power Consumption: 2750 mW (When multiple OMB-DBK4 cards are used, an OMB-DBK32A auxiliary power supply may be required.) Cables: Use OMB-CA-37-x cable with OMB-LOGBOOK and OMB-DAQBOARD-2000 Series