.ut-cat{color:#333;font-family:Arial,Helvetica,sans-serif;line-height:1.5;} .ut-cat h4{color:#1a1a1a;font-size:1.15em;margin:1.5em 0 .5em;padding-bottom:.25em;border-bottom:2px solid #ccc;} .ut-cat h2{color:#1a1a1a;font-size:1.25em;margin:1.2em 0 .4em;} .ut-cat h3{color:#222;font-size:1.05em;margin:1em 0 .3em;} .ut-cat p{margin:.6em 0;} .ut-cat ul{margin:.5em 0;padding-left:1.4em;}.ut-cat li{margin:.25em 0;} .ut-cat img{max-width:100%;height:auto;} .ut-cat table{border-collapse:collapse;width:100%;margin:.5em 0;} .ut-cat th,.ut-cat td{border:1px solid #ddd;padding:6px 10px;text-align:left;vertical-align:top;} .ut-cat td strong{color:#222;} Overview The MSO8000HD-FILTER adds a digital filter designer — apply custom FIR and IIR filters to captured waveforms for signal extraction and noise rejection. When standard bandwidth limiting isn't enough — extract specific frequency components or reject known noise sources with full filter control. The option is enabled by a software license keyed to the oscilloscope's serial number and is permanent for the life of the instrument. Key Features Custom Filter Design — Low-pass, high-pass, band-pass, band-stop with configurable cutoff and order. Real-Time Filtering — Apply to live acquisitions alongside the unfiltered signal. FIR and IIR — Choose linear phase (FIR) or sharper rolloff (IIR) topologies. Response Display — View filter frequency response before applying. Lifetime License Activation — activate once, owned for the life of the instrument. No subscriptions, no renewals, no maintenance fees. When You Need This Option The option fits the following workflows: Signal from Noise — Sensor signal buried in switching noise. Design a low-pass filter to reveal it. Frequency Isolation — Extract a specific frequency component for amplitude/phase analysis. Compatibility This option is compatible with the MSO8000HD Series: MSO8804HD (8 GHz). Frequently Asked Questions How is this option activated? The option is enabled by a software license keyed to the oscilloscope's serial number. After purchase, the license is registered on the UNI-T website to generate the license file, which is then loaded onto the instrument from a USB drive through the option-install menu. Refer to the oscilloscope's user manual for the step-by-step procedure. Is the license permanent, or does it require renewal? The license is permanent — a one-time purchase that stays active for the life of the instrument. No subscriptions, no annual renewals, and no expiration.