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IGOR Filter Design Laboratory, Version 3.1

    IGOR Filter Design Laboratory (IFDL) is a sophisticated and flexible environment for interactive design, evaluation, and application of Finite Impulse Response (FIR) digital filters.

    IFDL consists of IGOR procedures and an XOP (external operation) file that you use with your IGOR experiments and your existing copy of IGOR Pro. A printed and an electronic manual are included.

    IFDL 3.1 ships on CD-ROM, and requires IGOR Pro 3.12 or later (updaters for IGOR Pro 3.10 and 3.11 are included on the CD-ROM).

Applications of IFDL

  • Designing FIR filters for use with external programs or hardware.
  • Designing FIR filters to be used within IGOR to filter your data.
  • Experimenting with Digital Signal Processing (DSP) techniques.
  • IFDL is meant to be used by people with some knowledge of digital filters and DSP.

    IFDL does not design analog or Infinite Impulse Response (IIR) filters and does not perform system analysis.

IFDL's User Interface

    IFDL 3.1 has a substantially revised user interface that uses IGOR Pro's user-defined controls (push buttons, popup menus, and SetVariable controls):

The IFDL Filter Designs

    IFDL can design filters using the following techniques:

    Kaiser's Maximum Flatness design.
    Kaiser's window method.
    McClellan-Parks-Rabiner equiripple method:
      arbitrary response
      bandpass
      band reject
      differentiators
      highpass
      Hilbert transformers
      lowpass
      multi-band

    Window method using these standard windows:
      Hanning
      Kaiser[ß=1]
      Parzen
      Rectangular
      Welch
      (The user can easily add other windows.)

Instant Evaluation

    IFDL automatically applies the current filter design to ideal or real data you select, whenever you request it or whenever you change a filter design parameter for instant feedback on how the filter will affect the data.

Comparing Filters

    IFDL graphically compares two FIR filter's frequency, impulse, and step responses.

Applying Filters

    You can apply the designed filters in other experiments by importing the saved filter coefficients and combining them with your data:

    Macintosh System Requirements

     System 7.0 or later

     CD-ROM drive

     640x480 color display

     Igor Pro 3.12

     IFDL 3.1 is accelerated for Power Macintosh

    Windows System Requirements

     Windows 95, Windows NT 4.0 or later

     CD-ROM drive

     640x480 color display

     Igor Pro 3.12

     

Upgrades from IFDL 1.x

    Registered owners of IFDL 1.0 through 1.2 may upgrade to IFDL 3.1 for $50.00. [Upgrade is Part Number 10-550]

    Owners who purchased IFDL 1.2 after Jan 1, 1998 may receive a free upgrade by contacting WaveMetrics sales. You will need your IFDL serial number to take advantage of these upgrade prices.

Purchasing IFDL

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