CVS-126. Dual Frequency Color LCD Echo Sounder. The SI-TEX CVS-126 Dual-Frequency (50/200kHz) Echo Sounder features a digital signal processor (DSP) for a clearer image that enhances fish targets in shallow and deep depths, plus auto function for the most reliable setting and best performance.. Features:. Digital 5.7" Dual-Frequency Color LCD Fishfinder. a multi-conductor cable is supplied, used for power, and data output and input. DSP technology for a clearer detailed image that enhances fish targets. Digital signal processing. State-of the-art digital signal processor offers advanced filtering capabilities. Digital Filtering feature eliminates clutter by filtering out the noise to provide a clear detailed image that enhances fish targets in shallow and deep depths. Making it easy to differentiate between baitfish, larger fish, schools of fish and the sea floor. Sona-Tone. Exclusive Sona-Tone identifies what's under your boat with different sounds for fish and schools of fish. So you