Onwa KR-1968-H, Руководство оператора

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Only one signal cable runs from the display unit to the antenna unit. Make the hole
for passing the cable through the bulkhead or deck at least 20 millimeters diameter.
In order to minimize the chance of picking up electrical interference, avoid routing
the signal cable near other onboard electrical equipment. Also, avoid running the
cable in parallel with power cables. Pass the cable through the hole and apply sealing
compound around the hole for waterproofing.
The procedure for connecting the signal cable to the antenna unit is as follows:
1. Through a pipe or waterproof cable gland fitted on the wheelhouse top or bulkhead
2. Unfasten fastening bolts at rear of the scanner tail to remove the cable gland assembly.
3. Pass the signal cable sequentially through the fastening bolt, the washer, waterproof
apron, under the washer, and then through the mounting hole into the base of the
antenna inside(removed in step2)