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PR-420CA
Operator's Manual

Naval PR-420CA Operator's Manual

Manual is about: Video Entertainment System Marine FM/TV Antenna

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Operator’s Manual

Video Entertainment System

PR-420CA Marine FM/TV Antenna

NSN: 5985-01-369-2757 PN: PR-420CA

Information in this document, including attachments and exhibits, is subject to the

International Traffic in Arms Regulations (ITAR) or Export Administration Regulations (EAR).

No information from this document may be exported, released or disclosed to a foreign

person, either inside or outside the United States, without first obtaining proper export

authority. Violators of ITAR and/or EAR are subject to civil and/or criminal fines and penalties

under 22 U.S.C. 2778 and 50 U.S.C. 2410. Recipient shall include this notice on any reproduced

page or portion of a page of this document.

The information contained in this manual is proprietary to Naval electronics, inc. and may not

be reproduced or distributed without the consent of Naval electronics, inc. All Rights

Reserved.

Printed in USA

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Summary of PR-420CA

Page 1
Operator’s manual video entertainment system pr-420ca marine fm/tv antenna nsn: 5985-01-369-2757 pn: pr-420ca information in this document, including attachments and exhibits, is subject to the international traffic in arms regulations (itar) or export administration regulations (ear). No informatio...
Page 2
Page 1 of 8 naval pr-420ca is an active extra high performance omni-directional wide-band active terrestrial fm-tv antenna (40-860 mhz) for maritime purposes where second-rate efficiency is unacceptable. Constructed for high end commercial and military use, this compact and robust antenna shell is m...
Page 3
Page 2 of 8 a direct ac supply to the pra-420 should have a circuit breaker or switch, or alternatively should be supplied at an ac outlet in the same room. The room should be dry, with ventilation for heat to escape. A tv set should be in sight of the headend amplifier so as to help when performing...
Page 4
Page 3 of 8 attenuators: each attenuator is a 3 turn potentiometer and is rather delicate. Use a tuning tool or small screwdriver. Turn slowly so the end of travel stop may be felt.. Inject the vcr signal to the selected input port on the pra-420. While viewing the appropriate channel on the tv moni...
Page 5
Page 4 of 8 at this point the attenuation should be increased again slightly ccw to limit over driving. The amp is now at maximum gain without overdrive. Using a signal generator and frequency selective voltmeter: for the channel under adjustment, disconnect the antenna or other input device. Feed t...
Page 6
Page 5 of 8 the next few photos will show how this barrel connector is used in a splice and how it is waterproofed for marine use. This picture show: the second cable with connector is attached to the barrel adapter and wrench torqued. The connector on the right has an o ring in it's mouth and it is...
Page 7
Page 6 of 8 this picture show: a small roll of coax-seal. It is a putty like material in tape form. The white waxed paper keeps it from sticking to its self. This picture show: note that the first wrap comes back on itself exactly and the second trun starts the diagonal wrap. Wrap from the coax cove...
Page 8
Page 7 of 8 this picture show : the last wrap again comes straight back over the previous wrap without a diagonal. The seal is slightly sticky and should be molded now by hand to remove any gaps and to ensure that all the wraps are blending together. At somepoint the wraps will almost fuse together ...
Page 9
Page 8 of 8 most common problems with this antenna: 1. Water entry into the f connections just below the antenna...Electrolysis will corrode the soft copper center conductor of the coax. Cure: clean off the corrosion, dry the connectors and seal against the weather with "coax-seal" putty tape. Elect...