Output Interface Module Specifications

Dimensions 23cm x 15 cm x 4.5cm
Resolution 12 bits
Number of Analog Outputs 4
Computer Interface USB
Power +5V from USB bus; 250mA
Output Impedance <30 Ohms
Minimum Recommended Monitor Input Impedance 500 Ohms
Max Update Rate 5 Hz (this software setting for "Measurement Averaging Period" of 10)
Recommended Measurement Average Period Settings 10, 15, 20, 25 or more
Typical Timing Accuracy If Used With Recommended Settings 50ms (1/20s)
Connectors 2.5mm straight jack receptacle (mono audio jack); Unit supplied with 2.5mm jack to BNC cables
Connector Circuit Tip/Forward pin “hot” (signal up to 4.1V DC), back/rear connector is local signal ground.
Default Outputs
  1. % Saturation Channel A
  2. Total Hb Concentration Channel A
  3. % Saturation Channel B
  4. Total Hb Concentration Channel B
Additional Outputs Tip/Forward pin "hot" (signal up to 4.1V DC), back/rear connector is local signal ground.
Analog Output Voltage Range
  • Marker: 0V-4V pulse when marker button in software has been pressed
  • Clk/4: 0V-4V pulse at 3/4 analog output data update rate
  • Acq. Active 4: when data acquisition active
Installation Default Calibration of Analog Outputs
  • Saturation: 0% - 100% [0V - 4V]
  • Concentration: 0 µM - 250 µM [0V - 4V]