Lowrance HDS-7 LIVE HDS Live Operator Manual - Page 132
Modes in dual ranges, Directional clutter rejection, Gain, Noise Rejection, Fast scan
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132 Noise Rejection Custom: Adjustable Harbor: Medium Offshore: High Weather: Medium Bird: High Fast scan Custom: Adjustable Harbor: High Offshore: High Weather: OFF Bird: OFF * Maximum range is dependent on antenna length. Modes in dual ranges (Halo Radar only) Modes can be set independently for each range. For example, you can have Offshore mode for range A and Weather mode for range B. However, interaction between ranges occurs in some cases: • When using Bird mode for both ranges, maximum range is restricted to 24 NM and range resolution is reduced. • Fast scan - The antenna rotation speed is set to the slower of the two modes selected. For example, Fast Scan is disabled when using Harbor and Weather modes because Fast Scan is Off in Weather mode. • The Interference reject setting can affect the interference seen or removed on both ranges. Directional clutter rejection (Broadband 4G Radar only) This mode automatically works when GAIN = AUTO and SEA = HARBOR or OFFSHORE. The purpose is to allow smaller vessels to be seen in the leeward direction of the sea clutter. The GAIN of the radar receiver is increased dynamically during the sweep, in the leeward direction, for increased target sensitivity in heavier sea states. When GAIN or SEA = MANUAL, the Directional Clutter Rejection mode will be OFF (non-directional). In addition, CALM, MODERATE or ROUGH STC Curve settings are available in the Radar options menu to better optimize the radar image to your liking. Gain The gain controls the sensitivity of the radar receiver. Radar| HDS Live Operator Manual