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Icom IC-746PRO Instruction Manual

Other manuals for IC-746PRO: Instruction Manual, Service Manual
Manual is about: HF/VHF ALL MODE TRANSCEIVER

Summary of IC-746PRO

  • Page 1

    Hf/vhf all mode transceiver i746pro instruction manual this device complies with part 15 of the fcc rules. Operation is sub- ject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference tha...

  • Page 2

    I foreword we understand making you have a choice of many dif- ferent radios in the market place.I want to take a cou- ple of moments of your time to thank you for making your ic-746pro your radio of choice, and hope you agree with icom’s philosophy of “technology first”.Many hours of research and d...

  • Page 3: Table of Contents

    Ii supplied accessories the transceiver comes with the following accessories. Qty. Q dc power cable (opc-025d) ............................ 1 w hand microphone (hm-36) ................................ 1 e spare fuses (fgb 30 a) .................................... 2 r spare fuse (fgb 5 a) .............

  • Page 4: Quick Reference Guide

    I quick reference guide ■ installation 1. Install a ground system for dc noise suppression and rfi suppression 2. Install your dc power supply 3. Install lightning protection. This will help protect more than your gear. 4. Install and connect an antenna system for the ap- propriate bands of operatio...

  • Page 5

    Ii quick reference guide 3. Installing lightning protection although you may not live in an area with high occur- rence for lightning storms, it is always wise to take precautions for lightning or static discharges. Proper lightning protection not only offers protection to the ham gear, but the shac...

  • Page 6: Operation

    Iii quick reference guide 5. Connect other peripheral equipment everyone has his or her favorite ad-on gear; now is the time to connect this gear! We will cover the basic devices that can be connected to your ic-746pro. If you do not see the particular item you are wanting to connect, refer to the a...

  • Page 7: Your First Contact

    Iv quick reference guide 3. Other convenient items headphones: a 6.35(d) mm ( 1 ⁄ 4 ″ ) mono jack for operation without using the internal or external speakers. Perfect for op- eration without disturbing others in the room. External speaker: a 3.5(d) mm ( 1 ⁄ 8 ″ ) mono jack for operation with an ex...

  • Page 8

    V quick reference guide d just listening 3. Verify proper antenna has been selected. 1. Select the desired band your ic-746pro easy way of changing bands using the keypad located just above the tuning knob on the right hand side of the display. You will notice each switch has two sets of numbers; on...

  • Page 9

    Vi quick reference guide d what are you hearing? Stop and focus on what you are hearing. Do you hear a lot of noise? Is the signal intelligible? Are you set up for the right mode? How about the filters? 1. Verify mode your ic-746pro has many features to reduce qrm and qrn from the desired signal. A....

  • Page 10

    Vii quick reference guide c. Notch: there are two notch systems on your ic- 746pro. • automatic: the automatic notch will track up to three heterodynes. This is great for eliminating hetero- dynes on 80 and 160 meters, and those annoying tune up signals across the band. Once selected an icon will ap...

  • Page 11

    Viii quick reference guide d. Filters:— continued • on the fly adjustment: once the adjustments have been made in the filter set mode, you can make on the fly changes by using the twin pass band tuning, twin pbt. You will be able to see the effects of the twin pbt on the upper left hand side of the ...

  • Page 12: Ready to Call Cq?

    Ix quick reference guide once you have mastered your filter settings, one last feature to enable the most intelligible audio is the ac- tual audio tone you hear. You can adjust the equal- ization of your received audio ±5db. Q push [menu] several time, or until m2 is shown on the display. W push [f4...

  • Page 13

    X quick reference guide verify you have selected a clear frequency and call out your cq! The capable of changing the pass band of your trans- mit audio, is at your finger tip. Regardless of the con- dition of the speech compressor, you can adjust by selecting the [f4 tbw ]. You will find this locate...

  • Page 14: Panel Description

    1 1 panel description ■ front panel q power switch [power] ➥ push momentarily to turn power on. • turn the optional dc power supply on in advance. ➥ push for 1 sec. To turn power off. W transmit switch [transmit] selects transmitting or receiving. • the [tx] indicator lights red while transmitting a...

  • Page 15

    2 1 panel description • when functioning as rf gain control (squelch is fixed open; ssb, cw, rtty only) • when functioning as squelch control (rf gain is fixed at maximum.) while rotating the rf gain control, noise may be heard. This comes from the dsp unit and does not indicate an equipment malfunc...

  • Page 16: Front Panel

    3 1 panel description ■ front panel (continued) !8 multi-function switches [f1]–[f5] ➥ push to select the function indicated in the lcd display above these switches. (p. 11) • functions vary depending on the operating condition. ➥ push to input a character for memory keyer pro- gramming or memory na...

  • Page 17

    4 1 panel description @3 vox/break-in switch [vox/bk-in] ➥ in ssb, am and fm modes, push momentarily to turn the vox function on and off (p. 54); push for 1 sec. To enter vox set mode (p. 54). ➥ in cw mode, push momentarily to turn the semi break-in, full break-in or break-in off (p. 56); push for 1...

  • Page 18: Front Panel

    ■ front panel (continued) #8 transmit frequency check switch [xfc] (pgs. 45, 48) monitors the transmit frequency when pushed and held. • while pushing this switch, the transmit frequency can be changed with the tuning dial, keypad or memo pad. • when the split lock function is turned on, pushing [xf...

  • Page 19

    6 1 panel description $6 split switch [split] ➥ turns the split function on and off when pushed.(p. 59) ➥ turns the quick split function on, when pushed for 1 sec. (p. 60) • the offset frequency is shifted from the displayed fre- quency. • the quick split function can be turned off using set mode. (...

  • Page 20: Rear Panel

    ■ rear panel q dc power socket [dc 13.8v] (pgs. 14, 16) accepts 13.8 v dc through the supplied dc power cable (opc-025d). W antenna connector [ant 144mhz] e antenna connector 2 [ant2] r antenna connector 1 [ant1] (pgs. 14, 15, 17, 74) accept a 50 Ω antenna with a pl-259 connector. • [ant 144mhz] for...

  • Page 21

    8 1 panel description d data socket d acc sockets acc (1) pin no. Name description specifications 1 2 3 4 5 6 7 8 “high” level : more than 2.4 v 1 rtty controls rtty keying “low” level : less than 0.6 v output current : less than 2 ma 2 gnd connects to ground. Connected in parallel with acc(2) pin 2...

  • Page 22: Lcd Display

    9 1 panel description ■ lcd display q frequency readouts show the operating frequency. W multi-function meter indication ➥ shows receiving signal strength, etc. During re- ceive. ➥ shows transmit output power, alc and swr dur- ing transmit. E vox indicator (p. 54) appears when the vox function is ac...

  • Page 23: Lcd Display

    10 1 panel description ■ lcd display (continue) !5 break-in indicators (p. 56) ➥ “ f bk-in” appears when the full break-in function is activated. ➥ “bk-in” appears when the semi break-in function is activated. !6 monitor indicators (p. 57) appears when the monitor function is activated. !7 preamp in...

  • Page 24: Multi Function Switches

    11 1 panel description ■ multi function switches d m1 functions during ssb operation during ssb data operation during cw operation during rtty operation during am operation during fm operation agc (p. 49) ➥ push momentarily to changes the time constant of the agc circuit. ➥ push for 1 sec. To enter ...

  • Page 25: Microphone

    ■ microphone (hm-36) q up/down switches [up]/[dn] change the selected readout frequency or memory channel. • continuous pushing changes the frequency or memory channel number continuously. • while pushing [xfc], the transmit readout frequency can be controlled while in spilt frequency operation. • t...

  • Page 26: Unpacking

    2 13 installation and connections ■ unpacking after unpacking, immediately report any damage to the delivering carrier or dealer. Keep the shipping cartons. For a description and a diagram of accessory equip- ment included with the ic-746pro, see ‘supplied ac- cessories’ on p. Ii of this manual. ■ s...

  • Page 27: Required Connections

    2 14 installation and connections ■ required connections • front panel • rear panel i746pro power f 1 menu ssb f 2 cw/rtty f 3 am/fm f 4 filter f 5 xfc mp-w gene 50 mp-r 0 21 7 24 8 28 9 10 4 14 5 18 6 1.8 1 3.5 2 7 3 144 ent ts a/b split f-inp v/m m-cl pbtc mw twin pbt m-ch lock/ spch ∂ tx rit clea...

  • Page 28: Advanced Connections

    ■ advanced connections • front panel • rear panel 15 2 installation and connections power transmit phones elec-key mic nr a /notch tuner ant hf/vhf transceiver nr notch af mic gain rf pwr cw pitch f 1 f 2 f 3 f 4 f 5 xfc mp-w gene 50 0 21 7 24 8 28 9 14 5 10 4 18 6 3.5 2 1.8 1 7 3 144 ent mp-r tx rx...

  • Page 29: Power Supply Connections

    16 2 installation and connections ■ power supply connections use an optional dc power supply with a 25 a capacity and above when operating the transceiver with ac power. Refer to the diagrams below. Connecting ps-125 dc power supply connecting a dc power supply connecting a vehicle battery 30 a fuse...

  • Page 30: Linear Amplifier Connections

    17 2 installation and connections ■ linear amplifier connections connecting the ic-pw1 turn off the transceiver’s antenna tuner while tuning the ic-pw1’s tuner. Connecting a non-icom linear amplifier r warning: set the transceiver output power and linear amplifier alc output level referring to the l...

  • Page 31: Basic Operation

    Before first applying power, make sure all connections required for your system are complete by referring to chapter 2. Then, reset the transceiver using the fol- lowing procedure. Note: when first applying power or when operat- ing in cold environments, the display may flicker or appear faint. This...

  • Page 32: Selecting An Operating Band

    19 3 basic operation ■ selecting an operating band the transceiver has a triple band stacking register. This means that the last 3 operating frequencies and modes used on a particular band are automatically memorized. See the table below for a list of the bands available and the default settings for...

  • Page 33: Selecting Vfo/memory Mode

    20 3 basic operation ■ selecting vfo/memory mode vfo is an abbreviation of variable frequency oscilla- tor, and traditionally refers to an oscillator. ➥ push [v/m] to switch between vfo and memory modes. • pushing [v/m] for 1 sec. Transfers the contents of the se- lected memory channel to vfo mode (...

  • Page 34: Frequency Setting

    21 3 basic operation ■ frequency setting the transceiver has several tuning methods for conve- nient frequency tuning. D tuning with the tuning dial q push the desired band key on the keypad 1–3 times. • 3 different frequencies can be selected on each band with the band key. (p. 19) w rotate the tun...

  • Page 35

    22 3 basic operation d selecting the 1 hz step the minimum tuning step of 1 hz can be used for fine tuning. Q push [ts] momentarily to turn the quick tuning step off • “ ▼ ” disappears. W push [ts] for 1 sec. To toggle the 1 hz tuning step on and off. D band edge warning beep when selecting a freque...

  • Page 36: Operating Mode Selection

    23 3 basic operation ■ operating mode selection ssb (usb/lsb), ssb data (usb data/lsb data), cw, cw reverse (cw-r), rtty, rtty-r (rtty reverse), am, am data, fm and fm data modes are available in the ic-746pro. Select the desired operation mode as follows. To select a mode of operation, push the des...

  • Page 37

    3 basic operation 24 adjusts the rf gain and squelch threshold level. The squelch removes noise output from the speaker (closed position) when no signal is received. • the squelch is particularly effective for fm. It is also avail- able for other modes. • the control can be set as the rf gain contro...

  • Page 38: Basic Transmit Operation

    25 3 basic operation ■ basic transmit operation d transmitting before transmitting, monitor your selected operating frequency to make sure transmitting won’t cause inter- ference to other stations on the same frequency. Q push [transmit] or [ptt] (microphone) to trans- mit. • the [tx] indicator ligh...

  • Page 39: Receive And Transmit

    4 26 receive and transmit ■ operating ssb q push a band key to select the desired band. W push [ssb] to select lsb or usb. • below 10 mhz lsb is automatically selected; above 10 mhz usb is automatically selected. E rotate [af] to set audio to a comfortable listening level. R rotate the tuning dial t...

  • Page 40: Operating Cw

    27 4 receive and transmit ■ operating cw q push a band key to select the desired band. W push [cw/rtty] to select cw. • after cw mode is selected, push [cw/rtty] for 1 sec. To toggle between cw and cw-r modes. E rotate [af] to set audio to a comfortable listening level. R rotate the tuning dial to s...

  • Page 41

    28 4 receive and transmit d about cw reverse mode cw reverse mode receives cw signals with a reverse side cw carrier point like that of lsb and usb modes. Use this mode when interfering signals are near the desired signal and you want to change the interference tone. Use when interfering signals are...

  • Page 42: Electronic Keyer Functions

    29 4 receive and transmit ■ electronic keyer functions the transceiver has a number of convenient functions for the electronic keyer that can be accessed from the memory keyer menu. Q push [cw/rtty] to select cw mode. W push [menu] to select m1 . E push [f4 key ] to select the memory keyer menu. • t...

  • Page 43

    30 4 receive and transmit f 1 f 2 f 3 f 4 f 5 f 2 f 1 f 4 f 3 repeat indicators count up trigger indicator counter m 1 m 2 m 3 m 4 - 1 m 1 m 2 m 3 m 4 - 1 m2 send indication m 1 m 2 m 3 m 4 - 1 c q t e s t c q 0 0 1 c q t e s t c q 0 0 1 q r z ? M 1 m 2 m 3 m 4 - 1 u r 5 n n 0 0 1 b 0 0 1 0 0 1 m 1 ...

  • Page 44

    31 4 receive and transmit d editing a memory keyer the contents of the memory keyer memories can be set using the memory keyer edit menu. The memory keyer can memorize and re-transmit 4 cw key codes for often-used cw sentences, contact numbers, etc. Total capacity of the memory keyer is 50 character...

  • Page 45

    32 4 receive and transmit d contest number set mode this menu is used to set the contest (serial) number and count up trigger, etc. • setting contents q push [menu] to select m1 , then push [f4 key ] to select the memory keyer menu. W push [f4 001 ] to enter the contest number set mode. E push [f1 ≤...

  • Page 46

    33 4 receive and transmit d keyer set mode this set mode is used to set the cw side tone, mem- ory keyer repeat time, dash weight, paddle specifica- tions, keyer type, etc. • setting contents q push [menu] to select m1 , then push [f4 key ] to select the memory keyer menu. W push [f5 set ] to select...

  • Page 47

    34 4 receive and transmit 5. Rise time this item set the envelop time period which the output power becomes the set transmit power. • 2, 4, 6 or 8 msec. Can be selected. 4 m s 5 r i s e t i m e key action tx output power • about rise time tx rx set tx power level time 6. Paddle polarity this item se...

  • Page 48: Operating Rtty (Fsk)

    35 4 receive and transmit ■ operating rtty (fsk) before operating rtty, be sure to consult the manual that come with your tnc. Q push a band key to select the desired band. W push [cw/rtty] several times to select rtty. • after rtty mode is selected, push [cw/rtty] for 1 sec. To toggle rtty and rtty...

  • Page 49: Rtty Functions

    36 4 receive and transmit ■ rtty functions the transceiver has a number of convenient functions for the rtty operation that can be accessed from the rtty menu. Q push [cw/rtty] to select rtty mode. W push [menu] to select m1 . E push [f4 rty ] to select the rtty menu. R push one of the multi-functio...

  • Page 50

    D rtty filter/twin peak filter the transceiver has 5 rtty filters in addition to nor- mal if filters. The passband width can be selected from 1 khz, 500 hz, 350 hz, 300 hz and 250 hz. When the rtty filter is turned on, the rtty tuning meter can be used. Moreover, the twin peak filter changes the rec...

  • Page 51

    38 4 receive and transmit f 1 f 2 f 3 f 4 f 5 f 1 f 2 f 3 f 4 f 5 f 1 f 2 f 3 f 4 f 5 a g c d u p 1 / 4 r t y s c p d e c f i l s e t a d j r t t y - f i l o n push [f4] push [f2] appears while the rtty decoder screen is freezed with [f2] operation. Push [f3] to erase the displayed characters. D rtt...

  • Page 52

    39 4 receive and transmit d rtty set mode this set mode is used to set the mark and shift fre- quencies, keying type, decode usos function, etc. • setting contents q push [menu] to select m1 , then push [f4 rty ] to select the rtty menu. W push [f5 set ] to select rtty set mode. E push [f1 ≤ ] or [f...

  • Page 53: Operating Am

    40 4 receive and transmit ■ operating am q push a band key to select the desired band. W push [am/fm] to select am. E rotate [af] to set audio to a comfortable listening level. R rotate the tuning dial to tune a desired signal. • s-meter indicates received signal strength. • the default tuning step ...

  • Page 54: Operating Fm

    41 4 receive and transmit ■ operating fm q push a band key to select the desired band. W push [am/fm] to select fm. E rotate [af] to set audio to a comfortable listening level. R rotate the tuning dial to tune a desired signal. • s-meter indicates received signal strength. T push [transmit] or [ptt]...

  • Page 55

    42 4 receive and transmit d tone squelch operation tone squelch operation is a method of communica- tions using selective calling. Only received signal hav- ing a matching tone will open the squelch. Before communicating using tone squelch, all members of your party must agree on the tone squelch fr...

  • Page 56

    43 4 receive and transmit d dtcs operation dtcs function is an another method of communica- tions using selective calling. Only received signal hav- ing a matching 3-digit code will open the squelch. Q push [am/fm] to select fm mode. W push [menu] several times to select m1 . E push [f4 ton ] severa...

  • Page 57: Repeater Operation

    44 4 receive and transmit ■ repeater operation a repeater amplifies received signals and retransmits them at a different frequency. When using a repeater, the transmit frequency is shifted from the receive fre- quency by an offset frequency. A repeater can be ac- cessed using split frequency operati...

  • Page 58

    45 4 receive and transmit d transmit frequency monitor check you may be able to receive the other party’s transmit signal directly without having to go through a repeater. This function allows you to check this. ➥ while receiving, push and hold [xfc] to see if you can receive the other party’s trans...

  • Page 59

    46 4 receive and transmit d auto repeater function this function automatically activates the repeater set- tings (dup– or dup+ and/or tone encoder on/off) when the operating frequency falls within the general repeater output frequency range and deactivates them when outside of the range. Set the aut...