Icom AT-140 instruction manual Miscellaneous Items

MISCELLANEOUS ITEMS

The following parts are additionally required for instal- lation, but are not supplied with the AT-140. Purchase these parts locally.

qAWG 14⋅ 4-conductor shielded cable

*Icom offers an optional OPC-1147 CONTROL CABLE. Length: 10 m; 32.8 feet

w50 Ω coaxial cable e PL-259 connectors

FEATURES

Matches all bands

The AT-140 matches any frequency on every HF ma- rine band. For example, the tuner matches a 7 m; 23 ft long-wire antenna across 1.6–30 MHz.

Full automatic tuning

Just push the [TUNE] switch on the transceiver, and the AT-140 adjusts immediately to the minimum SWR of any frequency on any HF marine band.

HF operation on any size ship

The AT-140 allows you HF operation where antenna element length is restricted due to space.

Weather resistant

The AT-140 is housed in a durable, completely weather resistant ASA case with a rubber gasket. The antenna tuner can be conveniently installed both on the deck or in the cabin near the antenna element.

Simple installation

Installation is simple. Just connect the control and an- tenna cables. You never need to open the cover.

45 memories for shorter tuning time

To decrease the tune-up time, the AT-140 automatically stores the matching conditions for up to 45 frequencies. Re-tuning for a memorized frequency takes approx. 1 sec.

Super capacitor for memory backup

Even if the AT-140 is not used for approx. 1 week, the built-in super capacitor backs up contents of the 45 memories.

Low power tune up

The AT-140 emits low output power during tuning. This feature reduces the possibility of causing interference to other stations.

Tuner through function

The tuner through function is built into the AT-140. This function helps improve receiver gain, depending on the antenna element length used, and operating fre- quency.

TABLE OF CONTENTS

FOREWORD …………………………………………… i

IMPORTANT …………………………………………… i

EXPLICIT DEFINITIONS ……………………………… i

PRECAUTIONS ……………………………………… i

SUPPLIED ACCESSORIES ………………………… i

MISCELLANEOUS ITEMS ………………………… ii

FEATURES …………………………………………… ii

TABLE OF CONTENTS ……………………………… ii

1 ANTENNA SYSTEM …………………………… 1–2

■ Antenna for ship …………………………………	1
■ Antenna for land operation ………………………	1
■ Coaxial cable ……………………………………	2
■ Ground and counterpoise ………………………	2
2 INSTALLATIONS ………………………………… 3–5
■ lnstallation outline…………………………………	3
■ Control cable………………………………………	3
■ PL-259 connector…………………………………	4
■ Mounting …………………………………………	4
■ Cable connections ………………………………	5
3 CONTROL CABLE SIGNALS ………………… 6–7
■ Terminal information ……………………………	6
■ Transceiver setting ………………………………	7

4 UNIT DESCRIPTION AND SPECIFICATIONS

………………………………………………………… 8

■ Unit description……………………………………	8
■ Specifications ……………………………………	8

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