Download Digital Filter Design and FFT Signal Analysis Software for Windows
Registering
ScopeFIR, ScopeIIR, and ScopeDSP are powerful software tools for designing and analyzing Digital Signal Processing (DSP) systems. You may use their Trial Editions free for a 30-day trial period. The full licensing terms for each program can be found in the file “LICENSE.RTF” included in the distribution files below.
ScopeDSP Suite is a combined license to the Professional Editions of ScopeFIR, ScopeIIR, and ScopeDSP for just $699 – a savings of $198 compared to purchasing them separately.
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Installation Note: For best results, we highly recommend you install ScopeFIR, ScopeIIR, and ScopeDSP on a local drive rather than a network or mapped drive. The reason is that their help systems are in Microsoft’s “HTML Help” format, and Microsoft’s operating systems won’t open help files in Microsoft’s preferred help format if they aren’t located on a local drive. (Go figure…)
Purchase
You can purchase registrations (user licenses) for ScopeFIR Professional, ScopeIIR Professional, and ScopeDSP Professional through Amazon, PayPal, and other methods. See our Purchase page for details and purchase links.
Upgrade
Registered users all previous versions of ScopeFIR and ScopeDSP are eligible to upgrade to 6 at a reduced price. If you would like to try the latest versions, just install them to a separate directory and your prior versions will continue to work as before.
Program Editions
The following shows details about each edition of ScopeFIR:
| Feature | Trial Edition | Professional Edition |
| Purchase | Free | $599 |
| License period | 30 days | Unlimited |
| Maximum taps to design | 16384 | 16384 |
| Maximum taps to export | 32 | Unlimited |
| Maximum taps in coefficient editor | 32 | Unlimited |
| Print and Print Preview | No | Yes |
| Copy/paste plots | No | Yes |
| Maximum plot zoom levels | 8 | 35 |
The following shows details about each edition of ScopeIIR:
| Feature | Trial Edition | Professional Edition |
| Purchase | Free | $499 |
| License period | 30 days | Unlimited |
| Maximum filter order to export | 4 | Unlimited |
| Print and Print Preview | No | Yes |
| Copy/paste plots | No | Yes |
| Maximum plot zoom levels | 8 | 35 |
The following shows details about each edition of ScopeDSP:
| Feature | Trial Edition | Professional Edition |
| Purchase | Free | US $299 |
| License period | 30 days | Unlimited |
| Maximum read sample length | 65536 | Limited only by available memory |
| Maximum plot zoom levels | 4 | 35 |
| Print and Print Preview | No | Yes |
| Copy/paste plots | No | Yes |
| Modulated signal generator | No | Yes |
ScopeDSP Suite
ScopeDSP Suite is a combined license to the Professional Editions of ScopeFIR, ScopeIIR, and ScopeDSP for just $999 – a savings of $398 compared to purchasing them separately. See the ScopeDSP Suite page for more information.