Icom_AT-140_user.pdf

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1、HF AUTOMATIC ANTENNA TUNER AT-140 INSTRUCTION MANUAL Downloaded by? ? Amateur Radio Directory i FOREWORD Thank you for purchasing the AT-140 HF AUTO- MATIC ANTENNA TUNER. The AT-140 is designed, primarily for use with Icom HF transceivers. Refer to your HF transceiver instruction manual for op- erat

2、ion. If you have any questions, contact your dealer. IMPORTANT READ ALL INSTRUCTIONScarefully and com- pletely before using the AT-140. SAVE THIS INSTRUCTION MANUAL.This in- struction manual contains important safety and instal- lation instructions. EXPLICIT DEFINITIONS PRECAUTIONS RDANGER HIGH VOLT

3、AGE! NEVERtouch the antenna terminal, ground terminal, antenna or counterpoise while transmitting. Place the AT-140, an- tenna and counterpoise in positions where no one can touch them. NEVERuse without a ground connection. NEVERtransmit during internal adjustment. This may cause an electric shock.

4、USEthe ground terminal for ground connection. The mounting plate is not connected internally. DO NOToperate your HF marine transceiver without running the boats engine. AVOIDusing the AT-140 in areas where the temper- ature is below 30C (22F) or above +60C (+140F). Ground terminal Mounting plate Wor

5、d Defi nition RWARNING Personal injury, fi re hazard or electric shock may occur. CAUTIONEquipment damage may occur. NOTE If disregarded, inconvenience only. No personal injury, fi re hazard or electric shock. SUPPLIED ACCESSORIES The following accessories are supplied with the AT-140. Qty. q U-bolt

6、s2 w U-bolt plates 2 e Flat washers (M6 large) 8 r Flat washers (M6 small) 4 t Spring washers (M6) 8 y Nuts (M6) 8 u Hex head bolts (M650) 4 i Self-tapping screws (A0 630) 4 o Weatherproof cap1 !0 6-pin connector1 !1 Connector pins 4 !2 Ground cable (OPC-412)1 q w e r t y u i o!0 !1!2 Icom, Icom Inc

7、. and the are registered trademarks of Icom Incorporated (Japan) in the United States, the United Kingdom, Germany, France, Spain, Russia and/or other countries. ii MISCELLANEOUS ITEMS The following parts are additionally required for instal- lation, but are not supplied with the AT-140. Purchase th

8、ese parts locally. q AWG 144-conductor shielded cable *Icom offers an optional OPC-1147 CONTROL CABLE. Length: 10 m; 32.8 feet w 50 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 lon

9、g-wire antenna across 1.630 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 restrict

10、ed 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 co

11、ntrol 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

12、 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 t

13、hrough 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

14、OF CONTENTS ii 1 ANTENNA SYSTEM 12 I Antenna for ship 1 I Antenna for land operation 1 I Coaxial cable 2 I Ground and counterpoise 2 2 INSTALLATIONS 35 I lnstallation outline 3 I Control cable 3 I PL-259 connector 4 I Mounting 4 I Cable connections 5 3 CONTROL CABLE SIGNALS 67 I Terminal information

15、 6 I Transceiver setting 7 4 UNIT DESCRIPTION AND SPECIFICATIONS 8 I Unit description 8 I Specifi cations 8 1 1 ANTENNA SYSTEM I Antenna for ship Required antenna element length Required antenna element length to achieve full per- formance varies according to the lowest frequency: The longer the ant

16、enna element, the better the an- tenna effi ciency. Undesirable antenna element lengths AVOIDmultiples of 12 (half wavelength) for an- tenna element lengths, since tuning becomes diffi cult. L : Antenna element length to be avoided m f : Operating frequency MHz n : Natural number (n = 1, 2, 3, .) Ex

17、ample At an operating frequency of 16 MHz, avoid the fol- lowing antenna element lengths: For example, if 15 m is selected for an antenna ele- ment length, you have no problem in the 1.625 MHz marine bands range. NOTE: Keep antennas as far away from other objects as possible, especially metal object

18、s. Insulator Backstay operates as a long-wire antenna. Insulator Whip antenna L = 300 16 1 2 n9.4, 18.8, . 1 m39 inches L = 300 f 1 2 n The lowest frequencyRequired antenna element length 1.6 MHz band7 m; 23.0 feet or longer 4 MHz band3 m; 9.8 feet or longer I Antenna for land operation In some coun

19、tries, HF transceivers can be used for land mobile operation. Ask your Icom Dealer for de- tails, since the radio law varies according to each country. For land mobile operation on 4 MHz and above, an optional AH-2b ANTENNA ELEMENT is available. The AH-2b includes a sturdy tow hook mount system for

20、holding a 2.5 m; 8.2 feet stainless steel antenna element plus all the necessary hardware. Refer to the AH-2b instruction manual for the AH-2b and AT-140 installation to your vehicle. Ask your Icom Dealer for details. Connect a suitable antenna element for a base sta- tion. To achieve full performan

21、ce, refer to “Required antenna element length” above. AH-2b 2 1ANTENNA SYSTEM I Coaxial cable Insulate the lead-in cable of the AT-140 antenna ter- minal and antenna element from other metal objects. To prevent interference, keep cables as far as possi- ble from an antenna, electric pump and other e

22、lec- tronic equipment. To prevent erroneous indications, keep cables as far away as possible from the fl ux gate compass. Use suitable noise filters for alternators, fluorescent lights, etc. Ask your Dealer for details. I Ground and counterpoise Why a ships ground is required The AT-140s ground term

23、inal MUSTbe connected to your ships ground. Grounding prevents electric shocks, interference to other equipment and other problems. Grounding also ensures effective signal transmission. DANGER!NEVERconnect the ground terminal to the following points. These connections may cause an explosion or elect

24、ric shocks: Gas or electrical pipe Fuel tank or oil-catch pan IMPORTANT!The mounting plate is NOTcon- nected to the AT-140s internal ground. Ideal ground points One of following points is ideal: External ground plate External copper screen External copper foil Good ground points If electrically conn

25、ected to sea water, one of the fol- lowing points is usable: Stainless steel stanchion Through mast Through hull Metal water tank Undesirable ground points AVOIDthe following points, if possible. These con- nections may cause noise or electrolysis: Engine block Ships DC battery ground Electrolysis A

26、ll ground cables from the AT-140, HF transceiver, etc. on your ship should be connected to only 1 ships ground. AVOIDconnection to 2 or more points. Voltage dif- ference between 2 or more ships grounds may cause electrolysis. AVOIDconnection between dissimilar metals where an electric current is pre

27、sent. These connections may cause electrolysis. Counterpoise If your ship is made of FRP, etc. and a good ships ground is not available, connect a counterpoise. 14 (quarter wavelength) radial for each band is suit- able for a counterpoise. Install the counterpoise di- rectly below the AT-140s ground

28、 terminal. Insulate the ends of each radial from other metal objects. Lay- out the radial horizontally and as straight as possible. L : Counterpoise length for the operating frequency m f : Operating frequency MHz Example At an operating frequency of 16 MHz, use a counter- poise with the following l

29、ength: Ground cable For best results, use the heaviest gauge wire or metal strap available. Make the distance between the AT- 140s ground terminal and ships ground as short as possible. Supplied ground cable can be used for ground con- nection to a through mast. Confirm that the through mast is elec

30、trically connected to sea water. RWARNING! When grounding to metal hull Use a Zinc anode to protect the hull from electroly- sis. Ask your technical dealer, installer or refer to a tech- nical book, etc., for RF ground details. L = 300 16 1 4 4.7 m 1 m39 inches L = 300 f 1 4 Ground terminal AT-140 1

31、4 radial for each band 2 3 INSTALLATIONS I Installation outline q Connect a control cable and 4-conductor shielded cable. Refer to “Control cable” below. w Connect and solder the PL-259 connector to the coaxial cable. Refer to p. 4 “PL-259 connector.” e Mount the AT-140 in the desired location. Refe

32、r to p. 4 “Mounting.” r Connect the control cable and the coaxial between the transceiver and the AT-140. Refer to p. 5 “Cable connections.” t Connect an antenna, ships ground or counter- poise. Refer to p. 1 “Antenna for ship” and p. 2 “Ground and counterpoise.” I Control cable Between the AT-140 a

33、nd HF marine transceiver, con- nect 4 control signal lines as shown below. To prevent RF feedback, use a 4-conductor shielded cable. Con- nect the shield line to the GND terminal on the trans- ceiver. Icom offers 10 m (32.8 ft) long optional control cables as at right. OPC-566: for IC-M710/RT, M700P

34、RO OPC-1147: for IC-M802 Refer to p. 6 “Terminal information” for details. GND Use the optional OPC-1147, or as- semble the desired length 4-con- ductor shielded cable and the con- nector kits supplied with the transceiver and the tuner. E: Black 13.6: Red STAR : White KEY: Green KEY: Green STAR : W

35、hite 13.6: Red E: Black Use the optional OPC-566/1147 (either the connector to the AT-140 or the transceiver requires assem- bly), or assemble the desired length 4-conductor shielded cable and the connector kits supplied with the transceiver and the tuner. D When connecting to Icom IC-M802 D When co

36、nnecting to Icom IC-M710/RT, IC-M700PRO D When connecting to Icom IC-M700/TY, IC-78 E: Black 13.6: Red STAR : White KEY: Green GND GND GND To AT-140 E: Black 13.6: Red STAR : White KEY: Green GND To AT-140 E: Black 13.6: Red STAR : White KEY: Green GND To AT-140 E: Black 13.6: Red STAR : White KEY:

37、Green To transceiver To transceiver To transceiver Use the optional OPC-1147 (this connector only requires assembly), or assemble the desired length 4- conductor shielded cable and the connector kits supplied with the transceiver and the tuner. 4 2INSTALLATIONS I PL-259 connector q Slide the couplin

38、g ring over the coaxial cable. Strip the cable jacket and pull back to reveal 10 mm of braid. Soft solder the exposed braid and then pull out the jacket. w Strip the cable as shown below. Soft solder the cen- ter conductor the entire length of the exposed braid. e Slide the connector body over the c

39、able and sol- der as shown below. r Screw the coupling ring onto the connector body. SolderSolder 12 mm 10 mmsoft solder 10 mm 38 inches Coupling 30 mm 10 mm (soft solder) I Mounting Attach the AT-140 either horizontally or vertically with one of the water drains facing downwards. After mounting, re

40、move the screw in the water drain. Mounting on a Mast/Metal pole Mounting on a fl at surface Nut Spring washer Flat washer(L) Flat washer(L) Hex head bolt Drill a hole here Diameter:78 mm; 932516 inches Weatherproof cap Flat washer(S) Using self-tapping screws Using nuts and bolts WARNING:Mount the

41、AT-140 securely with the supplied nuts and bolts. Otherwise, vibrations and shocks due to waves, etc. could loosen the antenna tuner making if fall, causing personal injury. Using U-bolts U-bolt U-bolt plate Flat washer(L) Spring washer Nut Mast/ Metal pole Flat washer(S) Downloaded by? ? Amateur Ra

42、dio Directory 5 2INSTALLATIONS I Cable connections q Connect the coaxial cable and the control cable to the AT-140 as illustrated below. w Cover both the antenna and the control cable con- nectors with rubber vulcanizing tape and fi x it with a vinyl tape to prevent water seeping into the con- necto

43、r. e Fix both of the coaxial and control cables to pro- tect the inside connections. DO NOT pull the antenna and control cable re- ceptacles. This may cause disconnection (in the AT-140), internal connector damaged or bad connection. r Connect the coaxial cable and the control cable to the transceiv

44、er as illustrated below. t Ground the transceiver, AT-140 and shield cable of the control cable via the ground terminal. See pgs. 2 and 710 for grounding details. IMPORTANT! AT-140 NEVER ground the AT140 via the mounting plate. It is not connected to ground internally. Ground terminal Mounting plate

45、 Rubber vulcanizing tape AT-140 Icom HF transceiver Ground Ground OPC-1147 (10 m; 32.8 ft) Downloaded by? ? Amateur Radio Directory 3 6 CONTROL CABLE SIGNALS I Terminal information Consider the following points when using a non-Icom transceiver. Start voltage STAR When a start voltage (less than 1 V

46、) is received, the AT-140 begins automatic tuning. Key voltage KEY During automatic tuning, the AT-140 grounds the key voltage line, and the HF transceiver reduces output power. If the key voltage is more than 8 V, switch the mode switch (S1) to OFF mode (lower position). 8 6 4 2 0 Time Key voltage

47、V Grounded Approx. 7.5 V During automatic tuning 8 6 4 2 0 Time More than 350 msec.* Approx. 7.5 V Less than 1 V to start tuning Start voltage V *For tuner through operation; Less than 250 msec. KEY STAR 13.6 E TerminalDescription KEYKey voltage. Grounded during tuning. Max. current drain 100 mA. 13

48、.613.6 V DC + input terminal. Max. current drain 2 A STARReceives start voltage. Max. current drain 1 mA EGround terminal for above signals. Mode switch (S1) E 13.6 STAR KEY NORMAL mode OFF mode S1 Downloaded by? ? Amateur Radio Directory 7 3CONTROL CABLE SIGNALS I Transceiver setting IC-M700 with s

49、erial number 2500 and below In the IC-M700, change the TUNE switch setting from the “1” position to the “2” position. Confi rm that the KEY switch is in the “2” position. Refer to the IC- M700 instruction manual p. 9 for details. Other IC-M700 and IC-M700TY Nothing necessary to set. However, the tuner through function is not available when using the AT-140 with IC-M700/TY. IC-78 In the IC-78, select the antenna tuner type as “4* (AH- 4)” in initial set mode. See IC-78 instruction manual p. 32 for details. IC-M710/RT, IC