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LHBF – Bessel Filter

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LHBF – High and low pass Bessel Filter

  • 8 pole low pass filter with 16 corner frequencies
  • gain from 1 to 1000
  • differential input
Category:

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)

Ordering

Part No. Description
LHBF-48X-8HL High/Lowpass-Bessel Filter System (with differential input)

Downloads

Manual LHBF48X manual
Brochure LHBF-48X

ABOUT

The LHBF-48X amplifier/filter is designed for processing small bio-electrical signals. The unit is equipped with a differential input stage with an AC/0/DC switch for each input. The input stage is followed by the offset compensation, the GAIN stage (amplification from 1-1000), a HIGHPASS filter (one pole Bessel filter, 15 corner frequencies and DC) and a LOWPASS filter (four-pole Bessel filter, 16 corner frequencies).

Technical Data

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)

Ordering

Ordering

Part No. Description
LHBF-48X-8HL High/Lowpass-Bessel Filter System (with differential input)

Downloads

Downloads

Manual LHBF48X manual
Brochure LHBF-48X

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