Nobeltec InSight Radar 2, Installer'S Manual

Page: 50 / 76

44
Nobeltec InSight Radar (IR2)
Installer’s Guide
on the Adjust button to control various functions of the radar. None of the settings
that you enter here will be saved in the Nobeltec program.
Initial Radar Setup
Setting the Trigger Delay
After successfully installing the radar, the transmit trigger delay should be reviewed
and adjusted in order to compensate for cable transmission delays. Longer cable
runs, generally require a higher trigger delay setting.
To do so, Start the Nobeltec charting software and launch the Insight Radar window.
Once it is open and displaying a radar image, adjust the Transmit Trigger Delay. To
do this, click on the Radar drop down menu then on the Initial Radar Setup option.
Setting the Transmit Trigger Delay : The transmit trigger delay (TxTrig) is a setting,
when set incorrectly can cause a donut like ring to appear in the center of the radar
image. The trigger delay should be initially set to reduce the size of the ring. In most
cases Transmit Trigger should be between 125 and 160. Refinement of the transmit
trigger is best done using Nobeltec’s radar overlay on a chart.
Transmit Trigger Delay can also affect the radar image of a straight object such
as a breakwater and riverfront. These can appear deformed due to excessive or
inadequate trigger delay. Properly setting this may require on-the-water tuning when
looking at a straight object. The trigger delay adjustment removes deformations in
the radar return as shown in the images below.
The PC Connection