Advanced Options; Rejecting Radar Interference; Noise Rejection; Target Boost - Simrad R5000 Operator's Manual

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Advanced options

Rejecting radar interference

The IR (Interference rejection) is used to eliminate second trace echoes from far distance
targets, and the interference from radar units operating in the same frequency band.
When the IR is ON, transceiver pulse staggering is enabled. When enabled, the transceiver
PRF is changed slightly for each sweep. By doing this, spiral interferences and second trace
echoes are split in range from sweep to sweep. The IR processing clears all the echoes found
at the same range if they are not present in each sweep.
The IR must be chosen according to the environment around own ship:
• IR off when the maximum signal from the receiver is needed
• IR on when the interference or second trace echoes disturb the radar image
To avoid missing weak targets, the interference rejection should be set to OFF when no
interference exists.

Noise rejection

The Noise Rejection control sets the amount of noise filtering applied by the radar. Target
sensitivity is increased at longer ranges when this control is set to Low or High, but does
cause some loss of target discrimination.

Target boost

The target boost control increases pulse length, reduces radar bandwidth to make targets
appear larger in range, and increase radar sensitivity.

TGT expansion

Target expansion increases the length of targets in range, making them easier to see.

Fast scan

Change the speed of the radar antenna rotation from 20 RPM in standard mode to 40 RPM in
fast scan mode. This option gives faster target updates.
Ú Note:
The fast scan option is not available for 12 feet X-band antennas and for HSC radar
sensors.
Advanced options | R5000 Operator manual
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