Chapter 1: Overview
13
Radome scanner cables
Inter-unit cable
The length of the supplied cable should be sufficient to complete the
cable run required on most small vessels. For longer runs, additional
or replacement cables are available, which have 4 power cores to
minimize voltage drops over the longer cable run: these optional
cables include 5 m and 10 m extension cables, and a 25 m
replacement cable.
The maximum inter-unit cable length is limited by the minimum
supply voltage, the scanner type (18" radome or 24" radome), and the
cable type (2 or 4 power cores): if a mix of light and heavy cables is
used, only 2 power cores are connected through.
Note: For vessels with 24 V power systems, any combination of inter-
unit cables can be used.
For vessels with 12 V power systems, the recommended cable(s) for
different run lengths are given in the following table, which assumes
a minimum supply voltage of 10.7 V (the lowest voltage likely to be
reached by a 12 V battery in normal marine use). Do not use cable
combinations that are not included in the table.
Refer to the packing list in Section 1.2 for cable part numbers
Note: This table applies to systems using the standard 1.5 m power
cable. If you extend the power cable you may need to select different
inter-unit cable(s), as discussed in the following section Power Ca-
ble.
Table 1-4: Recommended Radome Inter-Unit Cable(s) for Vessels with
12 V Power Systems
Inter-Unit Cable
Length Required (m
)
Scanner Package
2D (US)
2DE (Eur)
4D
10
Std 10 m light
N/A
N/A
15
Std + 5 m ext
Std 15 m light
Std 15 m heavy
20
Std + 10 m ext
25 m assembly
Std + 5 m ext
25
25 m assembly
25 m assembly
Std + 10 m ext
30
25 m + 5 m ext
25 m + 5 m ext
25 m + 5 m ext
35
25 m + 10 m ext
25 m + 10 m ext
25 m + 10 m ext
154_4.book Page 13 Wednesday, October 25, 2000 3:02 PM
