Operation Manual
Page 22
...interference from other transducers. When using fishing modes, ping speed settings are optimized for more water coverage. 50 kHz provides the best depth penetration. Frequency Controls the transducer frequency used by the unit. Noise Rejection ... to send sonar waves into the water. This unit supports three conventional sonar frequencies: 50kHz, 83kHz and 200kHz. 200 kHz has the highest sensitivity and best target separation in shallow water. 83 kHz offers a wider cone angle for... etc.) has on your display, and then filters out undesired signals. Sonar Operation | Elite-4x HDI 20
...interference from other transducers. When using fishing modes, ping speed settings are optimized for more water coverage. 50 kHz provides the best depth penetration. Frequency Controls the transducer frequency used by the unit. Noise Rejection ... to send sonar waves into the water. This unit supports three conventional sonar frequencies: 50kHz, 83kHz and 200kHz. 200 kHz has the highest sensitivity and best target separation in shallow water. 83 kHz offers a wider cone angle for... etc.) has on your display, and then filters out undesired signals. Sonar Operation | Elite-4x HDI 20