The LHBF-48X is designed for processing small bio-electrical signals. The input voltage range is ±12 V and the inputs are protected up to ±100 V. Two overload-LEDs indicate when the linear region of the amplifier is exceeded. All inputs and the output are BNC-connectors.
The LHBF-48X is equipped with a differential input stage with an AC/O/DC switch for each input and an offset compensation. The gain stage allows the amplification of the signal from 1-1000 in 1-2-5 steps. The gain is selected by an ten-position rotary switch.
The amplified signal is applied to the output filter(s). The eight-pole Bessel lowpass filter has sixteen corner frequencies (30 Hz - 20 kHz). The output filter can be bypassed by using a toggle switch. Optionally, the LHBF-48X can be equipped with a single-pole Bessel highpass filter with eleven corner frequencies (0.3 Hz - 10kHz) and an OFF position. A NOTCH filter (50/60 Hz) is also available. The position of the GAIN and of the FILTER switches can be read from monitor outputs (1V/step).

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