PASCO's 750 Interface is the measurement center for the modern physics laboratory. Using a computer and the 750 Interface, students can measure force, position, temperature, pressure, angular velocity, acceleration, current, magnetic field and more. Each 750 Interface includes a built-in function generator and real-time oscilloscope mode.
Seven Input Channels:
With the 750, all 7 channels may be used simultaneously. There are no limitations on what combinations of sensors can be used. Analog and digital inputs may be mixed in any combination.
Four Digital Channels -- Use up to 4 Photogates or 2 Rotary Motion Sensors, a photogate and Motion Sensor II, or any other combination.
Three Analog Channels -- Max sample rate of 250,000 Hz when using a single channel.
250,000 Hz Sampling Rate -- Sample at 250,000 samples per second on a
single analog channel. Students will see a true, real-time oscilloscope and
incredibly responsive sound sensor data.
Built-in 1.5 W Function Generator -- Any experiment requiring a frequency up to 50 kHz and 1.5 watt (300 mA) output can be run without additional power amplification. Output current and voltage can be monitored internally by the 750 Interface.
20 KHz oscilloscope -- With the 750's increased sampling rate, the
oscilloscope becomes a real-time scope with refresh rates up to 40 frames per
Reduced Noise and More Accurate Data -- When sampling at rates less than 100 samples per second, circuit noise can be visible on a data graph. The 750 Interface provides 8X over-sampling to reduce noise and provide smoother data curves
Ports -- 4 Digital, 3 Analog, 1 Output
Connection -- USB
Data Sampling -- Simultaneous Analog and Digital Recording
Analog Rates -- Up to 250,000 samples/sec (20 kHz Oscilloscope)
Digital Rates -- 0.1 msec digital timing accuracy (1 mm resolution for
Function Generator -- 0-50 kHz, 1.5 W (300 mA) output
Power Amplifier Compatible
Designed for -- Advanced Placement and College Physics
12 VDC to 20 VDC at 2 A, 2.1 mm jack
4 identical channels, TTL compatible (8 mA max. drive current)
Maximum input logic transition time: 500 ns
Edge sensitive-sampled at 10 kHz. (1 µs resolution for Motion Sensor)
Analog Input Channels
3 identical channels with differential inputs and 1 MOhm impedance
±10 V maximum usable input voltage range (±12 V absolute input voltage range)
3 voltage gain settings on each analog channel: 1, 10, and 100
Small signal bandwidth up to the ADC: 1 MHz for a gain of 1, 800 kHz for a gain of 10, and 120 kHz for a gain of 100; input amplifier slew rate: 1.2 V/ µs
Electrostatic Discharge (ESD) protected
Both digital and analog inputs have ESD protection
12-Bit Analog to Digital Conversion
5 inputs: channels A, B and C, analog output voltage and current
Voltage resolution at ADC input: 4.88 mV (.488 mV at a gain of 10, 0.049 mV at a
gain of 100)
Current measurement resolution: 244 µA, (1 V = 50mA) mA
Offset voltage accuracy < ±3 mV. (For measuring full-scale voltages the total
error is less than ±15 mV, accounting for the gain error in the input
Sample rate range: once every 3,600 seconds (250 kHz) (Conversion time for consecutive channels in a burst is 2.9 µs.)
8X oversampling for better accuracy at sample rates less than or equal to 100
DC value ranges: -4.9976 V to +5.0000 V in steps of 2.44 mV
Accuracy at the DIN connector: (±3.6 mV ±0.1% full scale)
Peak-to-peak amplitude adjustment ranges for AC waveform: 0 V to ±5 V in steps of 2.44 mV
AC waveform frequency ranges: 0.001 Hz-50 kHz, ±0.01%
Maximum amplified output at the banana jacks: about 300 mA at ±5 V, current
limited at 300 mA ±12 mA