HB16 Stepper Motor Controller •
The internally powered HB16 Stepper Motor Controller can control up to 14 stepper motors used in either bipolar or unipolar mode of operation and provides two digital-to-analog voltage outputs for computer control of high voltage power supplies. The command controls for each motor are provided either through the parallel port of the computer or through the ISS cards. Each motor is selected through the multiplexer and motors can be enabled at any time. The unit is ideal to control devices in a laboratory environment.
PX01 Photon Counting Electronics ••
The PX01 unit accepts the input from three photomultiplier tubes and delivers either a TTL-output on three separate channels, or an analog output on two channels. ISS provides data acquisition boards for both photon counting and analog detection and software for data processing. The unit mounts three 100 MHz pre-amplifier discriminators (optimized for the Hamamatsu R928 PMT) for maximum dynamic range. The unit is powered by a universal power supply (110—240 Volt). Output voltages (+5, +15, -15 Volts) are available to connect other devices.
K2.LF Low Frequency Modulator ••
The K2.LF Low Frequency Modulator unit provides the modulation voltage for the light source and the light detectors at frequencies between 90 Hz and 1700 KHz for the measurement of long lifetime processes (phosphorescence). The unit can be utilized with K2™ or with ChronosFD™.
PCMC Card, for photon counting measurements on 3 channels
The 10 KHz Photon Counting PCI Board is designed for high temporal resolution (fast kinetics) measurements of fluorescence. The card was designed to eliminate the need of switching between analog and photon counting modes while performing fast kinetic studies. It allows for acquisition of data on three independent channels and features five 16-bit counters and I/O ports for automatic control.
DCA2D200K Card, for frequency-domain applications
The dual channel data acquisition board is designed for time-resolved data acquisition using the frequency-domain technique in conjunction with Fast-Fourier-Transform (FFT) routines. The board features two separate data acquisition channels, equipped with two 16-bit A/D converters and gain stages (X10, X100, X1000). An embedded microprocessor handles signal preconditioning, thus reducing the calculation load of the host computer. The PCI architecture allows the use of more than one board in the same computer when multiple data channels readings are required. A precise Direct Digital Synthesis (DDS) device, allows for data acquisition on each channel at any frequency to be phased locked to an external clock source (such as a mode-locked laser) using the synchronization clock input signal. It includes a programmable sequence generator for automatic patterned gain adjustment and/or driving the external (TTL) sequence output lines. The input/output lines are available for triggering data acquisition of external devices such as stopped-flow apparatus and for synchronizing the acquisition of multiple boards. DCA2D200K is currently utilized in the ISS K2™ Multifrequency Phase Fluorometer for lifetime determinations with picosecond resolution and in OxiplexTS™, a non-invasive tissue oximeter for the determination of hemodynamics parameters.