LHBF-48X
The LHBF-48X is designed for processing small bio-electrical signals. The input voltage range is ±12 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 (20 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 sixteen corner frequencies (DC, 0.1 Hz - 3kHz) 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).
Signal processing instruments are also available as modules for the EPMS-07 system.
Ordering
Part no. | Description |
LHBF-48X-4L | Bessel filter system with 4-pole low pass filter |
LHBF-48X-4HL | Bessel filter system with 4-pole low pass filter and 1-pole high pass filter |
LHBF-48X-8L | Bessel filter system with 8-pole low pass filter |
LHBF-48X-8HL | Bessel filter system with 8-pole low pass filter and 1-pole high pass filter |
LHBF-Notch | 50/60 Hz notch filter for LHBF-48X |
Technical Data
INPUT RANGE:
±12 V
INPUT IMPEDANCE:
1 MΩ related to ground (other values possible), input capacitance: 30 pF
AC COUPLING AT INPUT:
corner frequency of 0.1 Hz (if AC /0 /DC switch at BNC connector is switched to AC)
DIFFERENTIAL INPUT:
CMR >90 dB
OFFSET COMPENSATION:
±0.1 V, ±1 V or ±10 V by toggle switch and ten-turn potentiometer
LOWPASS FILTER:
8-pole Bessel, attenuation: -48 dB/octave, corner frequencies (Hz): 30, 100, 300, 500, 700, 900, 1.3k, 1.5k, 1.7K, 3k, 10k, 20k
HIGHPASS FILTER:
1-pole Bessel, attenuation: -8 dB/octave, corner frequencies (Hz): 0.3, 3, 10, 30, 100, 300, 500, 800, 1k, 3k, 10k; OFF position
GAIN:
rotary switch: 1-2-5-10-20-50-100-200-500-1000
OVERLOAD LEDS:
starting to light up at ±10 V
FULL POWER BANDWIDTH:
30 kHz
OUTPUT IMPEDANCE:
250 Ω
OUTPUT VOLTAGE:
max. ±12 V
LOAD CAPACITANCE:
max. 10 nF
GAIN / FREQUENCY MONITOR:
1V / step
POWER REQUIREMENTS
230 V/115 V AC, 20 W
DIMENSIONS:
19" rackmount cabinet, 19" (483 mm), 10" (250 mm), 3.5" (88 mm)