JRC JSS-296 -, Service Manual

Page: 5 / 220

1
1. INTRODUCTION
1.1 GENERAL
The installation of your JSS-296/596/896 (JSB-196GM, NCT-196N, NDZ-127J, NAH-692/695/698 and
NFC-296/896) determines its efficiency and its performance. Careful planning and implementation of the
installation are essential steps for the realization of maximum performance. Attention should be focused on
the dc power source and the antenna ground system (counterpoise). Your radio power output is dependent
upon the capability of the dc power source to supply and deliver the energy to your radio.
The antenna ground (counterpoise) is one half of your antenna system. Any skimping or short cuts reduce the
capability of your antenna to radiate the signal power delivered to it by your radiotelephone. Your
JSS-296/596/896 is designed to provide you with maximum signal radiation from your installation. The dc
power source and especially the counterpoise system are paramount importance to the proper operation of you
system.
1.1.1 Installation Location
Install the JSS-296/596/896 in a well-ventilated location, as free as possible from vibration so that the
equipment can withstand long periods of operation. If the equipment is to be installed on the bridge, keep the
equipment at a distance of 1.5 meters or more from the magnetic compass.
1.1.2 Grounding
Ground the JSS-296/596/896 by connecting grounding copper straps, between the ground such as metal hull
in steel vessels or ground screen/large metal masses in wooden or fiberglass vessels and the equipment, at
the minimum possible distance. For this purpose, use copper straps, which are at least 50 millimeter in width
and from 0.4 to 1.5 millimeters thick.