Low-pass Bessel Filter (LPF-8)

Low-pass Bessel Filter (LPF-8)

A signal conditioner combining an 8-pole low pass Bessel filter with a DC amplifier.

  • Provides greater frequency control for Bilayer and Oocyte Clamps
  • High quality 8-pole Bessel filter
  • 8-Pole low pass Bessel filter with cutoff frequencies from 0.1 Hz to 20 kHz
  • Differential amplifier gains to x200
  • Frequency selection with single control
  • Input offset adjustment
  • Digital frequency readout
  • Rack mountable

Item# Description U.S. List Price Quantity
64-0050 LPF-8 Bessel Filter, Low Pass Filter/DC Amplifier, Single Channel Rack Mount, Rack mount hardware supplied with LPF-8. Specify line operating voltage if other than 100-130 VAC
460-7013 (BNC-6) BNC to BNC cable, 6 feet (Pomona)
460-7032 (BNC-2) BNC to BNC cable, 2 feet (Pomona)
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LPF-8 special features include a digital frequency readout, visual input offset indicator, clipping indicator, and gain telegraph outputs. It is a premier low-pass Bessel filter that provides superior control of analog signal filtering from 0.1 Hz to 20 kHz. The LPF-8 instrument incorporates low-pass signal filtering and output gains from 1 to 200. Dual selectable signal inputs allow the instrument to be configured to operate in normal, inverted or differential modes.

This instrument features an optically encoded circuit which permits frequency selection in two ranges with a single control. Since the set frequency control is not a physical part of the filtering circuit, adjustments to the instrument do not introduce noise artifacts into the output signal. The unique circuit design uses no mechanical switching which insures long-term instrument reliability.

User Conveniences
  • Frequency is dialed up with a single rotary control in 2 ranges. Resolution is 0.1 Hz or 10 Hz, depending on range selected
  • BYPASS switch selects full amplifier bandwidth for comparison of filtered and unfiltered signal
  • The DC Offset / Clipping indicator is a zero center display serving two functions; it is used as a null meter with the offset control and it indicates overload (clipping) conditions
  • Gain telegraph signals are provided for data acquisition systems
Specifications
Input DC Differential
Input Impedance 1 MΩ each Channel
Input Range ± 10 V
Input Offset 2 Ranges, ± 100 mV and ± 1.0 V
variable from zero with 10-turn control
Offset Indicator 20 LED Display
Frequency Ranges Low: 0.1 to 199.9 Hz
High: 10 to 19.99 kHz
Low Range Resolution 0.1 Hz
High Range Resolution 10 Hz
Gains x1, x2, x5, x10, x20, x50, x100 and x200
Gain Telegraph Output 2.5 V to 6.0 V in 0.5 V steps,
x1 Gain = 2.5 V
Output Impedance 50 Ω
Power Requirements 100-130 VAC or 200-250 VAC, 50/60 Hz, 15 VA
Enclosure Rack Mount Cabinet, H xW x D
4.4 x 43.2 x 43.2 cm
(rack hardware included)
Shipping Weight 4.6 kg
Warranty 2 years
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  2. Proton transport through influenza A virus M2 protein reconstituted in vesicles
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  12. Glycine Binding Site of the Synaptic NMDA Receptor in Subpostremal NTS Neurons,
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  21. Electrophysiological evidence for the presence of NR2C subunits of N-methyl-D-aspartate receptors in rat neurons of the nucleus tractus solitarius,
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DOCUMENT DESCRIPTION
Warner Bilayer Workstation brochure (rev 060601).pdfWarner Bilayer Workstation Brochure
LPF-8 manual.pdfLPF-8 Instruction Manual