Icom IC-703 Instruction Manual Download Page 63 | Manualshive

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Icom IC-703 Instruction Manual Download Page 63

48

5

FUNCTION FOR RECEIVE

■

Noise blanker

■

AGC time constant

The

noise blanker

reduces pulse-type noise such as

that generated by automobile ignition systems. This
function is not effective for FM mode or for non pulse-
type noise. If you don’t want to use the noise blanker
for AM communications, the “

30 AM NB

” item in initial

set mode must be turned OFF (ON is the default set-
ting—p. 80).

q

Select

M3

.

• Push [DISPLAY] once or twice to select

M

.

• Push [MENU] one or more times to select

M3

.

w

Push [(F-2)

NB

] to toggle the noise blanker ON and

OFF.

• “NB” appears when the noise blanker is turned ON.

e

Push [

(F-2)

NB

] for 1 sec. to enter the noise blanker

level set mode (below).

r

Rotate the main dial to set the noise blanker level.

t

Push [DISPLAY] to exit the noise blanker level set
mode.

NB

CH

VFO A

S1

5

3

7

9

20

40

60dB

USB

M3 FIL

NB

MET

P

O

5

10

Appears when
the noise blanker
is turned ON.

Main dial

[DISPLAY]

[MENU]

[F-2]

The

AGC

(Automatic Gain Control) controls receiver

gain to produce a constant audio output level even
when the received signal strength is varied by fading,
etc. Use AGC slow for normal phone operation; AGC
fast for receiving data and searching for signals. AGC
time constant cannot be changed in FM mode.

q

Select

M4

.

• Push [DISPLAY] once or twice to select

M

.

• Push [MENU] one or more times to select

M4

.

w

Push [(F-3)

AGC

] to toggle the AGC time constant

between fast and slow.

• “F

AGC

” appears when the fast time constant is selected.

CH

VFO A

S1

5

3

7

9

20

40

60dB

USB

M4 VOX COM AGC

F

AGC

P

O

5

10

Appears when
AGC fast is
selected.

[DISPLAY]

[MENU]

[F-3]

N1 NB LEVEL

This item adjusts the noise blanker level. The noise
blanker level can be adjusted from 0 to 10.

The default is 5.

USB

Although noise blanker level set mode is available in all modes, the noise blanker function is not effective for FM
mode.

While

M3

is selected in all modes, push [

(F-2)

NB

] for

1 sec. to enter the noise blanker level set mode.

D

Noise blanker level set mode

5

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Summary of Contents for IC-703

Page 1: ...HF 50 MHz ALL MODE TRANSCEIVER i703 INSTRUCTION MANUAL ...

Page 2: ...in snow or any liquids AVOID using or placing the transceiver in areas with tem peratures below 10 C 14 F or above 60 C 140 F Be aware that temperatures on a vehicle s dashboard can exceed 80 C 176 F resulting in permanent damage to the transceiver if left there for extended periods AVOID placing the transceiver in excessively dusty envi ronments or in direct sunlight AVOID placing the transceiver...

Page 3: ... listening V 1 Select the desired band V 2 Tune to the desired frequency V 3 Adjust audio output V D What are you hearing VI 1 Verify mode VI 2 Reducing interference Some functions may require an optioanl unit depending on version VI Ready to call CQ IX 1 Setting up your Mic Gain IX 2 Speech compressor X 1 PANEL DESCRIPTION 1 10 Front panel 1 Multi function switches 4 DM1 functions 4 DM2 functions...

Page 4: ...ns for transmit 41 Operating FM 42 DConvenient functions for receive 42 DConvenient functions for transmit 42 DTone squelch operation 43 DTone scan operation 43 DFM tone set mode 44 Repeater operation 45 5 FUNCTION FOR RECEIVE 46 50 Simple band scope 46 Preamp and attenuator 46 RIT function 47 IF shift function 47 Noise blanker 48 DNoise blanker level set mode 48 AGC time constant 48 Optional filt...

Page 5: ...8 16 Light timer setting 78 17 LED brightness 78 18 Automatic power OFF 78 19 Current intercept point 79 20 RF gain squelch control 79 21 Sub dial setting 79 22 Optional filter selection 79 23 Peak meter hold setting 79 24 Quick split function 79 25 Split lock function 80 26 Split offset frequency 80 27 Scan resume condition 80 28 Scanning speed 80 29 UP DN speed 80 30 Noise blanker in AM mode 80 ...

Page 6: ...vering proper grounding techniques Check with your local dealer for more information and recommendations RWARNING NEVER ground station equip ment or antennas to house gas lines NEVER at tach ground lines to plastic pvc pipe D D Some Symptoms if inadequate grounding a Poor DC Ground 50 60 Hz hum on the audio either Rx or Tx without the antenna connected If you feel a tingling sensation when you tou...

Page 7: ...R INSTALLATION EXAMPLE 30 mm 9 8 in 10 mm 3 8 in 1 2 mm 1 16 in R WARNING Although a mag mount antenna works great on a vehicle DO NOT use the IC 703 with this type of antenna CAUTION Although your IC 703 has protection to drop down power with a high SWR this does not completely protect the transceiver from transmis sion without an antenna Make sure you have an antenna connected whenever you trans...

Page 8: ...a Iambic Key paddle Use a 6 35 d mm 1 4 stereo plug and connect to the KEY jack located on the rear of the radio b Straight Key Use a 6 35 d mm 1 4 mono plug and connect key to the back of the radio c External Keyer Use a 6 35 d mm 1 4 mono plug and connect to the back of the radio d Computer Keying Use a 6 35 d mm 1 4 mono plug and connect to the back of the radio NOTE You will need to select the...

Page 9: ...io you may want to make sure the following controls are set in the fol lowing positions AF Commonly referred to as the vol ume fully counter clockwise RF SQL The control for the RF Gain and Squelch circuits 12 o clock SHIFT Shifts the IF center frequency 12 o clock 2 Resetting the CPU Although you have purchased a brand new radio some settings may be changed from the factory defaults during the QC...

Page 10: ...Y BAND or Z BAND several times to select it This will change the displayed operating frequency to the 20 meter band NOTE The band stacking register can also be used to select bands Refer to p 22 Y Z Directly left of the Y BAND Z BAND is the main dial This will allow you to dial in the frequency you want to operate You will notice the tuning speed TS is 10 Hz resolution Page 20 will instruct you on...

Page 11: ...et mode Hint How far you advance the NR control will determine how much the noise can be effectively reduced Ad justing the noise reduction level too high may cause some distortion to occur on the received signal The noise reduction level should only be set as high as is necessary Use this setting along with RF gain NB noise blanker if needed and IF filters as well to minimize the effects of noise...

Page 12: ...SSB D modes CH VFO A PO S1 5 5 3 7 9 20 40 10 60dB USB BLANK S4 ANF NR NRL ANF ANF DSP Appear F 1 DISPLAY MENU d Noise Blanker The noise blanker function re duces pulse type noise such as that generated by automobile ignition systems This function is not ef fective for FM modes or for non pulse type noise qSelect M3 Push DISPLAY once or twice to select M Push MENU one or more times to select M3 wP...

Page 13: ...79 FILTER ON OFF qSelect M3 Push DISPLAY once or twice to select M Push MENU one or more times to select M3 wPush F 1 FIL momentarily to select the narrow filter push for 1 sec to select the wide filter ã appears when the narrow filter is selected ç ap pears when the wide filter is selected NOTE When selecting the narrow filter or wide fil ter the graphic passband is changed see dia gram below CH ...

Page 14: ...so that the ALC meter does not peak past the ALC zone While transmitting at your normal voice level the ALC meter should read at about the middle of the ALC zone Be sure the mic gain is in the range of 2 to 5 tPush DISPLAY to exit quick set mode ALC ALC zone ALC S1 5 3 7 9 20 40 60dB USB Q2 MIC GAIN MENU Main dial DISPLAY Ready to call CQ BAND BAND MODE TS DISPLAY LOCK F 1 F 2 F 3 AF RF SQL RIT SH...

Page 15: ...nter the compres sion level set mode p 54 yRotate the main dial to set the speech compression level NOTE When the ALC meter peaks at light the ALC zone your transmitted voice may be distorted Hint Voice patterns and audio characteristics vary with each operator therefore the Microphone gain speech compression settings will be different for each operator Actual on air experimenting is nec essary to...

Page 16: ... SSB CW and RTTY squelch control in AM and FM or squelch control RF gain is fixed at maximum in initial set mode as follows p 79 When setting as RF gain squelch control 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 Squelch is open S meter squelch S meter squelch threshold Noise squelch threshold FM mode Sh...

Page 17: ...Y Z BAND Push momentarily to select a band Can also be used to advance or back the quick set mode items initial set mode items etc Push and hold to scroll through the bands contin uously 0MAIN DIAL TENSION LATCH Selects the main dial tension 2 positions are available 1MICROPHONE CONNECTOR p 10 Modular type microphone connector Accepts the supplied microphone HM 103 The optional OPC 589 can be used...

Page 18: ...hen headphones are connected no receive audio comes from the speaker When the PHONES SPEAKER switch on the back of the front panel is set to the SPEAKER position an external speaker can be connected This is convenient for mobile or outdoor operation 0TUNER SWITCH TUNER pgs 64 66 Push momentarily to toggle the automatic an tenna tuner function ON and OFF bypass Lights red when the automatic antenna...

Page 19: ...TE p 57 Push for 1 sec to store the selected read out frequency and operating mode into the displayed memory channel MEMORY CLEAR p 58 Push for 1 sec to clear the selected read out memory channel contents appears This switch does not function in VFO mode VFO MEMORY Push momentarily to toggle between VFO and memory modes p 56 Push for 1 sec to transfer the frequency and operating mode in the select...

Page 20: ... FUNCTION Push to toggle the 1 4 tuning function ON and OFF When the 1 4 function is ON a bar appears under the 1 4 indication and fine tuning can be used KEYER SET MODE p 32 Push for 1 sec to enter the keyer set mode The break in setting break in delay time CW pitch CW paddle type and dot dash ratio can be set in the keyer set mode What is the break in function Full break in QSK activates the rec...

Page 21: ...the selected memory channel DS3 functions QUICK BAND CHANGE FUNCTION p 22 This item provides access to the band stacking regis ter By default the 7 14 and 21 MHz bands are dis played Push F 1 F 2 or F 3 for 1 sec to select a new band if desired A mode is memorized along with the frequency for each band DS4 functions UT 106 is required for some version AUTOMATIC NOTCH FILTER p 50 This function auto...

Page 22: ...I V transceiver or receiver uMICROPHONE CONNECTOR MIC p 13 Accepts the supplied microphone connected in par allel with the front panel s MIC connector See p 2 for microphone notes See p 10 for microphone connector information iELECTRONIC KEYER JACK KEY p 28 Accepts a paddle to activate the internal electronic keyer Selection between the internal electronic keyer and straight key operation can be m...

Page 23: ...el Approx 100 mV rms AF detector output Output impedance 4 7 kΩ 12 AF Fixed regardless of AF position in Output level 100 300 mV rms default settings 13 SQLS Squelch output SQL open Less than 0 3 V 5 mA Goes to ground when squelch opens SQL closed More than 6 0 V 100 µA DATA PIN No NAME DESCRIPTION 1 2 3 4 5 6 Rear panel view 1 DATA IN Input terminal for data transmit 1200 bps AFSK 9600 bps G3RUH ...

Page 24: ...OR Appears when the selected memory channel is set as a select memory channel oMEMORY CHANNEL READOUT Shows the selected memory channel 0DOT MATRIX INDICATORS These alphanumeric readouts show a variety of in formation such as current functions of the F keys F1 to F3 memory channel names set mode items etc See p 94 for an overview of these indi cators 1METER READOUTS Shows receiving signal strength...

Page 25: ...ATION PIN NO FUNCTION DESCRIPTION 1 8 V DC output Max 10 mA 2 Frequency up Ground Frequency down Ground through 470 Ω 8 Squelch open LOW level Squelch closed HIGH level r PTT y Microphone input w Frequency up down u GND q 8 V DC output i Squelch switch t GND Microphone ground e AF output Rear panel view 1 2 3 4 5 6 7 8 HM 103 SCHEMATIC DIAGRAM 4700p 4700p 10µ 0 33µ MICROPHONE MIC ELEMENT 2k 2 2k 4...

Page 26: ...or electric pipe since the connection could cause an explosion or electric shock Antenna connection For radio communications the antenna is of critical im portance along with output power and sensitivity Se lect antenna s such as a well matched 50 Ω antenna and feedline 1 5 1 or better of Voltage Standing Wave Ratio VSWR is recommended for your desired band Of course the transmission line should b...

Page 27: ...right fig 1 wAttach the optional OPC 581 to the main body and tighten the supplied screw as in fig 2 eAttach the other end of the OPC 581 to the de tached front panel as in fig 3 CAUTION NEVER detach attach the front panel when connecting the DC power supply or battery Make sure the disconnecting DC power cable from the 13 8 V receptacle on the transceiver rear panel qAttach the MB 63 to a flat su...

Page 28: ...SUB PHONES TUNER P AMP ATT Y Z POWER MENU TX RX MICROPHONE p 10 HF 50 MHz ANTENNA GROUND p 11 HM 103 CW KEY p 28 Use the heaviest gauge wire or strap available and make the connection as short as possible Grounding prevents electrical shocks TVI and other problems Connects to DC 9 0 15 8 V power supply See p 15 for details ...

Page 29: ... MENU TX RX OPC 589 p 92 DESKTOP p 91 MICROPHONE Selectable with the PHONE SPEAKER switch on the back of the front panel SPEAKER ACC SOCKET p 8 DATA SOCKET p 8 6 pin mini DIN socket to connect to a TNC etc for packet operation AH 4 p 16 AH 2b EXTERNAL SPEAKER p 91 HEADPHONES SP 7 SP 10 SM 20 or REMOTE p 71 Used for computer control and transceive operation 2 ...

Page 30: ...y mode when the voltage reaches 11 5 V This 0 5 V voltage difference prevents irregular switching between nor mal mode and battery mode caused by the voltage drop which are current capacity receiving or transmit ting When 11 3 V voltage is applied the IC 703 may acti vate the battery operating mode depending on the current capacity of the power supply AC cable AC outlet A DC power supply 13 8 V at...

Page 31: ... ICOM LINEAR AMPLIFIER R WARNING Set the transceiver output power and linear ampli fier ALC output level referring to the linear amplifier instruction manual Be sure the linear amplifier key ing circuit control voltage is compatible with the IC 703 before connecting to HSEND line ACC cable The ALC input level must be in the range 0 V to 4 V and the transceiver does not accept positive voltage Non ...

Page 32: ...set controls and switches as shown in the diagram below POWER Y Z CLEAR OK F 3 Push F 3 for 1 sec N W R LSB NB VOX F BK COM F CH VFO A DUP VFO B MEMO AGC ALC SWR PO S1 1 1 5 2 3 5 5 3 7 9 20 40 10 60dB USB CW RTTY AM WFM TSQL SPL S NR ANF BLANK DSP CH VFO A PO S1 5 5 3 7 9 20 40 10 60dB USB BLANK M1 SPL A B XFC DC SUPPLY RF POWER The transceiver s initial frequency and mode BAND BAND MODE TS DISPL...

Page 33: ...mory mode VFO MODE Each VFO shows a frequency and operating mode If the frequency or operating mode is changed the VFO automatically memorizes the new frequency or oper ating mode When the VFO is selected from another VFO or memory mode the last used frequency and operat ing mode for that VFO appear EXAMPLE MEMORY MODE pgs 56 60 Each memory channel shows a frequency and oper ating mode like a VFO ...

Page 34: ...s eRotate the main dial to set the desired tuning step Change the mode and select tuning steps for other modes if desired rPush TS to exit the tuning step selection mode tRotate the main dial to change the frequency ac cording to the set tuning step Band selection All HF ham bands the 50 MHz band and a general coverage receiver band are included in the IC 703 Push Y BAND Z BAND to select the desir...

Page 35: ...equency 1 Hz or 10Hz tuning step Rotating the main dial changes the frequency in 10 Hz steps Rotating the main dial changes the frequency in 1 Hz steps TS Push for 1 sec VFO A USB VFO A USB TS MODE Main dial 1 MHz quick tuning step The quick tuning step function allows you to change the frequency in 1 MHz steps when rotating the main dial This function is only available in FM and AM modes qSelect ...

Page 36: ... The SUB indicator lights green if it lights red the RIT function is activated sub dial function must be set in initial set mode in this case wRotate M CH to change the operating frequency according to the set tuning step ePush RIT SUB again to turn the function OFF The SUB indicator turns off RIT SUB M CH RIT SUB Indicator lights green while the sub dial function is activated TS switch flow chart...

Page 37: ...orresponding switch The last used frequency and mode for the selected band are displayed 1 1 83000 MHz for Italy version 10 20 2 50 MHz band is not available for some version 3 General refers to the general coverage receiver GEN in the display and the range varies according to version BLANK CH VFO A S1 5 3 7 9 20 40 60dB USB S3 7 GEN 21 PO 5 10 Display shows F 2 has been changed from its default o...

Page 38: ...V during CW mode Y Z or M CH can also be used eRotate the main dial to select CW reverse rPush DISPLAY to exit quick set mode CW å appears åRTTY RTTY reverse mode selection qWhen selecting RTTY mode push DISPLAY for 1 sec to enter quick set mode wPush MENU one or more times to select item Q2 RTTY REV during RTTY mode Y Z or M CH can also be used eRotate the main dial to select RTTY reverse rPush D...

Page 39: ...gnal until the noise just disappears RX indicator light goes out Rotating RF SQL past the threshold point invokes the S meter squelch this allows you to set a minimum signal level needed to open the squelch When setting as RF gain squelch control 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 Squelch is ope...

Page 40: ...k function The dial lock function prevents accidental changes caused by the tuning dial Push LOCK to turn the dial lock function ON and OFF LOCK indicator lights while the dial lock function is activated Lights while the dial lock function is activated LOCK DMaximum output power qPush POWER for 1 sec to turn power OFF wWhile pushing LOCK push POWER to turn power ON and enter initial set mode ePush...

Page 41: ...t your signal does not distort when transmitted qSelect SSB or another phone mode AM or FM mode wPush DISPLAY for 1 sec to select quick set mode ePush MENU one or more times to select Q2 MIC GAIN The ALC meter is selected automatically when operat ing in SSB mode rWhile speaking into the microphone adjust the mi crophone gain so that the ALC meter does not peak past the ALC zone tPush DISPLAY to e...

Page 42: ... NB for 1 sec to enter the noise blanker set mode IF shift p 47 Rotate SHIFT control AGC auto gain control p 48 While M4 is selected push F 3 AGC to select AGC fast and AGC slow Push DISPLAY once or twice to select M Push MENU one or more times to select M4 FAGC appears when the fast time constant is se lected Noise reduction p 50 While S4 is selected push F 2 NR to turn the noise reduction ON and...

Page 43: ...W CW Paddle KEY MICROPHONE Straight key Microphone Keyer set mode setting Rear panel 4 8 12 ACC 1 2 3 7 6 5 9 10 11 13 For no break in operation Connect an external switch such as a foot switch or use the RTTY SEND terminal for all bands See p 38 See p 31 for connection details Paddle operation from front panel MIC connector Normal Reverse Bug 4 ...

Page 44: ...eyer set mode p 32 iSet CW break in operation as semi break in full break in or OFF Push MENU one or more times to select K1 BK IN Rotate the main dial to select CW break in operation FULL full break in on semi break in OFF no break in ACC socket connection is neces sary as at previous page oSet the CW delay time when semi break in opera tion is selected Push MENU one or more times to select K2 BK...

Page 45: ...e S4 is selected push F 1 ANF to turn the auto notch filter function ON and OFF ANF appears when the noise reduction is set to ON 1 4 function While M4 is selected push F 1 1 4 to turn the 1 4 function ON and OFF Push DISPLAY once or twice to select M Push MENU one or more times to select M4 Break in function p 32 While M4 is selected push F 2 KEY for 1 sec to enter the keyer set mode Push DISPLAY...

Page 46: ...down switches on the mi crophone can be used as a paddle ePush MENU one more time to select item K5 RATIO then rotate the main dial to select the de sired weight Key weight can be selected from 2 8 to 4 5 Check the selected ratio with the side tone function in CW mode rPush DISPLAY momentarily to return to M4 tPush DISPLAY for 1 sec to enter quick set mode y Push MENU once or twice to select Q2 KE...

Page 47: ...r electronic keyer use r reverse for electronic keyer use buG When using the electronic keyer key down produces a dash releasing the key automat ically produces a dot s oFF Turns OFF the electronic keyer for straight key use ud For using the microphone s UP DN keys in stead of the CW paddle The default is n normal CW K5 RATIO This item adjusts the CW key ratio or weight The ratio can be selected f...

Page 48: ... BLANK M4 1 4 KEY AGC CW 1 MK1 MK2 MK3 F 1 F 2 F 3 MENU F 1 F 2 F 3 MENU F 1 F 2 F 3 MENU F 1 F 2 F 3 MENU CW Ä MK1 MK2 MK3 F 1 F 2 F 3 MENU CW Ä EDT 001 SET F 1 F 2 F 3 MENU CW Ä ÅCFU TU Ç _ Push MENU Ä or DIAPLAY Push MENU Ä or DIAPLAY Push MENU Ä or DIAPLAY Push MENU Ä or DIAPLAY CW Ä ÅUR 5NN BÇ _ CW Ä ÅCQ TEST CÇ _ MENU MENU CW 02 MSG DISPLAY CW 01 REPEAT TIME CW 03 PRESENT No CW 02 CNT UP TRI...

Page 49: ...ansmission Keying with the connected straight key or paddle to KEY on the rear panel is also cancels the transmis sion Under bars _ _ _ are indicated for the count up trig ger set channel The contest number counter is incremented each time the contents are sent Push MENU to reduce the contest number count by 1 when resending contents to unanswered calls t Push MODE momentarily to exit memory keyer...

Page 50: ...test number The contest number automatically increments by 1 This function is only available for one memory keyer channel at a time Memory keyer channel MK2 used by default Push F 2 to erase characters y Push F 1 ç or F 3 å to move the cursor back wards or forwards respectively u Repeat steps t and y to input the desired char acters i Push MENU or DISPLAY three times to return to the keyer send me...

Page 51: ...al Y Z 02 CONT UP TRIG Count up trigger This selects which of the three memory slots will have the contest serial number exchange The count up trigger allows the serial number automatically incre mented after each complete serial number exchange is sent 1 MK1 2 MK2 and 3 MK3 can be set default 2 CW 02 CNT UP TRIG 01 NUM STYLE Number style This item sets the numbering system used for contest serial...

Page 52: ...ired condition using the main dial y Push DISPLAY twice to return to the memory keyer send menu MENU DISPLAY M CH F 3 MODE Main dial Y Z 01 REPEAT TIME Repeat time When sending CW using the repeat timer this item sets the time between transmission 1 to 60 sec in 1 sec steps can be selected CW 01 REPEAT TIME 02 MSG DISPLAY Message display This item sets the indication type of the messages pre set c...

Page 53: ...or 1 sec to enter the quick set mode Push MENU one or more times to select Q2 Push DISPLAY momentarily to return to normal oper ating mode t Rotate AF to set audio to a comfortable listening level ySelect the desired FSK tone shift frequencies and keying polarity as at page 40 u Rotate the main dial to tune a desired signal Use F 1 1 4 in the M4 display when critical setting is required S meter in...

Page 54: ...or more times to select S4 Push F 3 NRL then rotate M CH to adjust the noise reduction level NR appears when the noise reduction is set to ON Auto notch filter p 50 While S4 is selected push F 1 ANF to turn the auto notch filter function ON and OFF ANF appears when the noise reduction is set to ON 1 4 function While M4 is selected push F 1 1 4 to turn the 1 4 function ON and OFF Push DISPLAY once ...

Page 55: ... se lect the desired keying polarity After presetting is finished push DISPLAY momen tarily to return the normal operating mode RTTY R3 RTTY KEYING RTTY keying is set to normal normal key open mark key close space reverse key open space key close mark RTTY R2 RTTY SHIFT RTTY shift frequency is set to 170 Hz 170 200 425 Hz are available RTTY R1 RTTY TONE RTTY mark frequency is set to 2125 Hz 2125 1...

Page 56: ... times to select M3 NB appears when the noise blanker is set to ON Push F 2 NB for 1 sec to enter the noise blanker set mode Initial set mode item 30 AM NB p 80 is must be set ON when noise blanker function is used in AM mode Default setting is ON IF shift p 47 Rotate SHIFT control AGC auto gain control p 48 While M4 is selected push F 3 AGC to select AGC fast and AGC slow Push DISPLAY once or twi...

Page 57: ...MODE Main dial AF Y Z FM appears Preamp and attenuator p 46 Push P AMP ATT momentarily to set the preamp ON or OFF Lights green when the preamp is set to ON Push P AMP ATT for 1 sec to set the attenuator ON Push P AMP ATT momentarily to turn the attenua tor OFF Lights red when the attenuator is set to ON IF shift p 47 Rotate SHIFT control Noise reduction p 50 While S4 is selected push F 2 NR to tu...

Page 58: ...cy necessary to open a repeater qDuring tone squelch or repeater operation T or TSQL is displayed select M4 Push DISPLAY once or twice to select M Push MENU one or more times to select M4 wPush F 2 TON for 1 sec to enter the FM tone set mode Push MENU one or more times to select T3 T SQL SCN during tone squelch operation or T3 RPTR T SCN during repeater operation If tone squelch function or tone e...

Page 59: ...from 67 0 Hz to 254 1 Hz see table at right Available subaudible tone frequencies Unit Hz The default is 88 5 Hz FM T2 TONE SQL This item sets a subaudible tone for tone squelch use The same subaudible tone frequencies as for re peater operation are available see above The default is 88 5 Hz FM While M4 is selected in FM mode push F 2 TON for 1 sec to enter the FM tone set mode DFM tone set mode 6...

Page 60: ...Y to exit the FM tone set mode uPush F 2 TON to turn the tone encoder T appears iTo check the repeater input frequency direct sig nal from the other station push and hold F 3 XFC in the M1 display oTo return to simplex operation push F 1 SPL in the M1 display Each memory channel can store a tone frequency and an offset frequency as well as the operating fre quency Store repeater information into m...

Page 61: ...t determined by the sweep width the sweep marker flashes yPush F 2 to return the frequency to the start of a sweep The sweep marker moves back to the center position 1k SWP 2k SWP 2k SWP 2k SWP ___ 2k SWP Select sweep width F 1 Start sweep F 3 Sweep is finished F 3 again Move sweep marker main dial 2k SWP Returns to previous frequency F 2 sweep marker Main dial DISPLAY MENU F 2 F 3 F 1 Preamp and ...

Page 62: ...SHIFT CH VFO A S1 5 3 7 9 20 40 60dB USB RIT function The RIT Receive Incremental Tuning function com pensates for off frequencies of communicating sta tions The function shifts the receive frequency up to 9 99 kHz in 10 Hz steps without moving the transmit frequency 21 SUB DIAL item in initial set mode must be set to RIT mode in advance p 79 qPush RIT The RIT indicator lights red wRotate the M CH...

Page 63: ...is turned ON Main dial DISPLAY MENU F 2 The AGC Automatic Gain Control controls receiver gain to produce a constant audio output level even when the received signal strength is varied by fading etc Use AGC slow for normal phone operation AGC fast for receiving data and searching for signals AGC time constant cannot be changed in FM mode qSelect M4 Push DISPLAY once or twice to select M Push MENU o...

Page 64: ...ct M Push MENU one or more times to select M3 wPush F 1 FIL momentarily to select the narrow filter push for 1 sec to select the wide filter ã appears when the narrow filter is selected ç ap pears when the wide filter is selected NOTE When selecting the narrow filter or wide fil ter the graphic passband is changed see dia gram below DISPLAY MENU F 1 Normal operation wide is selected narrow is sele...

Page 65: ... S4 DSP menu Push DISPLAY once or twice to select S Push MENU one or more times to select S4 wPush F 2 NR to toggle the noise reduction func tion ON and OFF DSP and NR appear when the function is ON ePush F 3 NRL to toggle the noise reduction level indication ON and OFF rRotate the M CH control to set the noise reduc tion level Set the control for maximum readability Deep rotation results in audio...

Page 66: ...ile push ing F 3 XFC Split operation is now set for receive on 7 057 MHz CW and transmit on 7 025 MHz CW To exchange the transmit and receive frequencies push F 2 A B in M1 CONVENIENT The G3 display conveniently shows the transmit fre quency during split frequency operation and pushing F 3 Ñ allows you to change the transmit frequency Split lock function The split lock function is convenient for c...

Page 67: ...rotate the main dial to select the desired split offset The split offset can be selected from 9 999 MHz to 9 999 MHz VFO A VFO A SPL SPL SPL SPL VFO A VFO B VFO B No shift frequency is programmed 10 kHz is programmed as a shift frequency Push for 1 sec SPL F 1 DISPLAY MENU F 1 26 SPL OFFSET Meter selection The bar meter in the function display acts as an S meter for relative signal strength during...

Page 68: ...the microphone adjust VOX GAIN until the transceiver is transmitting ySelect ANTI VOX in VOX set mode Push MENU one or more times to select V3 If the receive audio from the speaker toggles the trans ceiver to transmit during receive adjust the ANTI VOX to the point where it has no effect uPush DISPLAY to exit VOX set mode DISPLAY MENU F 1 Main dail R LSB CH VFO A PO S1 5 5 3 7 9 20 40 10 60dB USB ...

Page 69: ...Push MENU one or more times to select M3 then push F 3 MET one or more times to select ALC tPush MENU one or more times to select M4 yPush F 2 COM to turn the speech compressor function ON COM appears uPush F 2 COM for 1 sec to enter the compres sion level set mode below iRotate the main dial to set the speech compression level NOTE When the ALC meter peaks above the ALC zone your transmitted voic...

Page 70: ...ch yPush and hold F 2 one or more times to select the desired step uAfter selecting the desired pitch and step push F 3 STR to measure the SWR RTTY mode is selected automatically iPush and hold PTT to display the SWR in a bar graph readout oWhen PTT is released the frequency marker and frequency indication move to the next frequency to be measured 0Repeat steps i and o to measure SWR over the enti...

Page 71: ...ed UP DN on the microphone changes the frequency rTo return to VFO mode push F 3 V M again CW CH VFO A EXAMPLE Selecting memory channel 17 V M F 3 USB CH MEMO SPLIT CH MEMO USB M CH SHIFT DISPLAY MENU M CH F 3 Memory channel selection NOTE During split frequency operation pro grammed memory contents can be called up to the SUB readout dot matrix portion of the display MEMORY CHANNEL MEMORY CHANNEL...

Page 72: ...isplayed frequency and operating mode into the memory channel To check the programmed contents push F 3 V M to select memory mode CW CH VFO A EXAMPLE Programming 7 088 MHz LSB into ch 12 TS MODE MW F 1 LSB BLANK SPLIT CH VFO A LSB CH VFO A LSB CH VFO A Push for 1 sec M CH SHIFT DISPLAY MENU M CH F 3 F 1 Memory programming Programming in memory mode qSelect M2 functions Push DISPLAY once or twice t...

Page 73: ... operating mode can be trans ferred from memory mode to VFO mode qSelect M2 functions Push DISPLAY once or twice to select M Push MENU one or more times to select M2 wSelect VFO mode with F 3 V M eSelect a memory channel with M CH Select memory mode to confirm the memory channel s contents if desired then return to VFO mode appears if the selected memory channel is a blank channel and does not hav...

Page 74: ... memory channel name as above wPush F 3 É to enter memory name edit mode DEL appears briefly then a cursor blinking under the first character position eRotate the main dial to select the desired charac ter then advance the cursor position Pushing F 3 Ç moves the cursor to the right F 1 Å moves the cursor to the left Pushing F 2 deletes the character rRepeat this procedure until all desired charact...

Page 75: ...ally stored in a temporary pad The frequency and operating mode in the temporary pad can be recalled by pushing F 3 MPR one or more times NOTE If you change the frequency or operating mode called up from a memo pad the frequency and operating mode in the temporary pad are erased Displayed frequency and mode Push Newest MP5 MP4 MP3 MP2 MP1 The oldest written frequency and mode are erased Oldest MPW...

Page 76: ...erates in VFO mode SELECTED MEMORY SCAN Repeatedly scans all selected memory channels PRIORITY WATCH Checks for signals on a memory while operating on a VFO frequency This scan operates in memory mode This scan operates in memory mode This scan operates in VFO mode Scan Scan edge 1A or 1B Scan edge 1B or 1A Jump Mch 1 Mch 5 Memory channel VFO frequency Mch 2 Mch 3 Mch 4 Mch 6 Mch 7 Mch 99 MEMORY S...

Page 77: ...cies are programmed into the scan edge memory channels 1A and 1B programmed scan does not start CH VFO A PO S1 5 5 3 7 9 20 40 10 60dB USB S2 SCN PRI V M Select VFO mode F 1 then push F 1 SCN DISPLAY F 1 MANU SQL Programmed scan operation qSelect memory mode wClose the squelch with SQL eSelect S2 Push DISPLAY once or twice to select S Push MENU one or more times to select S2 rPush F 1 SCN to start...

Page 78: ...e Select watching channel F 2 Push F 2 PRI CH PO S1 5 5 3 7 9 20 40 10 60dB USB VFO A DISPLAY MANU F 2 SQL qSelect memory mode wClose the squelch with SQL eSelect S2 Push DISPLAY once or twice to select S Push MENU one or more times to select S2 rPush F 1 SCN to start the memory scan Decimal point blinks while scanning tPush F 2 SEL to change the memory scan to se lect memory scan Push F 2 SEL for...

Page 79: ...ER to turn power ON CLEAR OK appears as shown below eRotate main dial to select tuner reset rThen Push F 3 for 1 sec to start tuner resetting The memorized tuner settings are reset TUNER TUNER Lights to indicate internal tuner is activated CLEAR OK F 3 POWER Y Z D DIf the tuner cannot tune the antenna Check the following and try again the antenna connection and feedline the unaltered antenna SWR L...

Page 80: ...enna SWR p 55 meter function Through inhibit HF bands only The AT 180 has a through inhibit condition When se lecting this condition the tuner can be used at poor SWR s In this case automatic tuning in the HF bands activates only when exceeding SWR 3 1 Therefore manual tuning is necessary each time you change the frequency Although termed through inhibit the tuner will be through if the SWR is hig...

Page 81: ...stantly when tuning is complete When the connected wire cannot be tuned the TUNER light goes out the AH 4 is bypassed and the antenna wire is connected to the antenna connector on the transceiver directly rTo bypass the AH 4 manually push TUNER PTT tune function The AH 4 is always tuned when the PTT is pushed after the frequency is changed more than 1 This function removes the push and hold TUNER ...

Page 82: ...onnect SQL line when required MSEND orenge GND red SQL 1 light green AF in pink AF out light blue TU or TNC Personal computer DWhen connecting to MIC connector MIC Rear panel SQL AF out PTT GND MIC GND Rear panel view TU or TNC Personal computer Connections for packet Rear panel Personal computer DATA TNC SIDE TU or TNC RS 232C PTT PTTP DATA IN SQL RX AUDIO GND TX AUDIO q w e y t r AF OUT DATA OUT...

Page 83: ...icates received signal strength yTransmit your AFSK signals using your computer s keyboard The TX indicator lights red NOTE When connecting a TNC to the ACC socket on the rear panel select SSB D mode or discon nect the microphone and adjust MIC GAIN to 0 in quick set mode When SSB D mode is selected the audio input from the MIC connector is automatically cut and the audio input from the ACC is use...

Page 84: ...ctor is automatically cut and the audio input from the ACC is used OPERATING MODE SELECTION MODE Push momentarily Memory keyer set mode MODE Push for 1 sec USB LSB FM AM SSB D CW RTTY MODE qSelect SSB D mode with MODE wPush DISPLAY for 1 sec to enter quick set mode ePush MENU one or more times to select Q2 CAR SIDE then rotate the main dial to select U USB mode or L LSB mode MODE Main dial DISPLAY...

Page 85: ...nal limiter circuitry to automati cally maintain bandwidth NEVER apply data levels from the TNC of over 0 6 Vp p otherwise the transceiver will not be able to maintain the band width and may possibly interfere with other stations NOTE Read the instructions supplied with your TNC carefully before attempting packet operation with the IC 703 1 When using a level meter or synchroscope adjust the TX au...

Page 86: ...le code fixed Controller s default address Transceiver s default address Command number see table at right Sub command number see table at right BCD code data for frequency or memory number entry End of message code fixed DCI V connection example The transceiver can be connected through an optional CT 17 CI V LEVEL CONVERTER to a personal computer equipped with an RS 232C port The Icom Communi cat...

Page 87: ...PBT outside setting 0 max CCW 128 center 255 max CW 09 Level data CW pitch setting 0 300 Hz 128 600 Hz 255 900 Hz Command Sub command Description 14 0A Level data RF power setting 0 mini to 255 max 0B Level data Microphone gain setting 0 mini to 255 max 0C Level data Key speed setting 0 slow to 255 fast 0E Level data COMP Level setting 0 0 to 10 10 0F Level data Break IN DELAY setting 20 2 0d to 1...

Page 88: ... read CW keyer repeat time 01 1 sec to 60 60 sec 0321 Send read CW keyer transmission indication 0 Normal 1 First 3 character 2 First 3 character contact number 0322 Send read contact number style 0 Normal 1 190 ANO 2 190 ANT 3 90 NO 4 90 NT 0323 Send read count up trigger chan nel 1 MK1 2 MK2 3 MK3 0324 Send read present number 1 999 04 Send read DATA mode 0 OFF 1 ON 1B 00 Set read repeater tone ...

Page 89: ...M CH POWER Main dial Y Z Q1 RF POWER USB Item number Item Value or condition DISPLAY EXAMPLE QUICK SET MODE PO S1 5 5 3 7 9 20 40 10 60dB DQuick set mode operation qPush POWER for 1 sec to turn power OFF wWhile pushing LOCK push POWER to turn power ON Initial set mode is selected and one of its items ap pears ePush MENU one or more times to select the de sired item M CH or Y Z can also be used rRo...

Page 90: ...lt is 20 wpm CW Q2 RTTY REV RTTY mode This item selects RTTY or åRTTY RTTY reverse mode The default is normal RTTY Q3 CW REV CW mode This item selects CW or CWå CW reverse mode The default is normal CW Q3 CARRIER Frq SSB mode This item adjusts the carrier frequency BFO fre quency allowing you to change the audio character istics Selectable values are 200 to 200 Hz in 10 Hz steps USB The default is...

Page 91: ...SSB D USB LSB CW and RTTY AM FM The default is OFF Initial set mode items 2 PoSAVE MODE The power save mode reduces the current drain to conserve battery power This function is convenience for battery operation AUTO The power save function starts in 1 1 200 msec 200 msec ratio when no signal is re ceived for 5 sec then the ratio becomes in 1 4 200 msec 800 msec and 1 8 200 msec 1600 msec after no ...

Page 92: ...default is 5 9 BEEP LIMIT This item allows you to set a maximum volume level for confirmation beep tones Confirmation beep tones are linked to the AF control until a specified volume level is reached further rotation of the AF control will not increase the volume of the beep tones Beep limit ON default Beep limit OFF 12 SID T LIMIT This item sets the CW side tone level limit When the AF control is...

Page 93: ... The key switch backlighting can be set to high low or OFF to suit ambient lighting Key switch backlighting set to high default Key switch backlighting set to low 17 LED BRIGHT LED brightness The LED brightness control for front panel can be set to high or low LED brightness set to high LED brightness set to low default 16 LIGHT TIMER The Light timer can be set to AUTO ON or OFF to suit lighting c...

Page 94: ...lects the RIT function default Pushing RIT SUB selects the sub dial function 22 OPT FIL When an optional filter is installed this selection is necessary otherwise the filters cannot be selected Selections available are FL 52A FL 53A FL 222 FL 257 and none default See p 49 for usable filters for each mode and see p 87 for filter installation Although the FL 96 is not listed on the option list IC 70...

Page 95: ...channels or frequen cies are scanned during scan operations High or low can be selected Scan speed is set to high default Scan speed is set to low 29 U D SPEED UP DN speed This item sets the rate at which frequencies are scanned through when the UP DN switches of the microphone are pushed and held High or low can be selected Up down speed is set to high default Up down speed is set to low 27 SCAN ...

Page 96: ...1 from last tuned frequency Internal tuner or connected AT 180 Tuning can be started automatically at the mo ment the PTT is pushed Connected AH 4 oFF PTT tuner start function OFF Tuning starts when pushing PTT on a new frequency Tuning starts only when TUNER is pushed default 33 A TUNE STRT The optional AT 180 ANTENNA TUNER has an automatic start capability which starts tuning if the SWR is highe...

Page 97: ...transfer rate When Auto is selected the baud rate is automatically set according to the connected controller or remote controller Auto baud rate default 19200 bps 43 CI V 731 When connecting the IC 703 to the IC 735 for trans ceiver operation you must change the operating fre quency data length to 4 bytes This item MUST be set to on only when operating trans ceiver with the IC 735 Frequency data s...

Page 98: ...transceiver when changing a fuse The IC 703 has three of fuses DC power cable fuses 2 circuitry fuse 1 installed for transceiver protection Fuses F G B 125 V 4 A DC POWER CABLE FUSE REPLACEMENT q w e CIRCUITRY FUSE REPLACEMENT The 13 8 V DC from the DC power cable is applied to all units in the IC 703 except for the power amplifier through the circuitry fuse This fuse is installed in the PA unit M...

Page 99: ...ed IN p 15 p 83 pgs 1 17 23 pgs 1 17 24 p 14 pgs 64 66 p 46 p 23 p 47 p 48 p 46 Volume level is set too low The squelch is closed The transceiver is in the transmitting condition An external speaker or headphones are connected The antenna is not connected properly The antenna feed line is cut or shorted The antenna is not properly tuned The attenuator function is activated The operating mode is no...

Page 100: ...me frequencies have been programmed in scan edge memory channels 2 or more memory channels have not been programmed 2 or more memory channels have not been designated as select channels Set squelch to the threshold position Programm different frequencies into scan edge memory channels Program 2 or more memory chan nels Designate 2 or more memory chan nels as select channels for the scan Set gain i...

Page 101: ...ated voice in English or Japanese qRemove the top cover as shown above wConnect the UT 102 as shown in the diagram at right label side up eReplace the top cover D DOperation qSelect the desired announcing condition such as speed language contents in initial set mode p 82 wPush LOCK for 1 sec until zero is announced to announces the selected contents Adjusting the announcing audio level Adjust the ...

Page 102: ... page wDisconnect the coaxial cable connectors P2 and P4 then unscrew 10 screws on the MAIN unit Attach the grounding spring at the same place when re turning eSlide the MAIN unit in the direction of the arrow q then open the MAIN unit in the direction of the arrow w Be careful for the flat cables rInstall the desired filter as shown in the diagram below tTighten the nuts then solder the filter s ...

Page 103: ... the orientation of the flat cable tAttach the UT 106 to the main CPU shielding case using the existing guide for alignment as illustrated at right above yReassemble the transceiver P1 UT 106 J2451 J2453 J3 Flat cable P2451 J1 UT 106 Front side J2451 Front side MAIN unit top side Main CPU shielding case P2451 MB 72 CARRYING HANDLE The optional MB 72 CARRYING HANDLE is convenient when carrying the ...

Page 104: ...O NAME DESCRIPTION q8 V Regulated 8 V output 10 mA max wGND Connects to ground eSEND Input output pin Goes to ground when transmitting 20 mA max When grounded transmits rBAND Band voltage output Varies with amateur band 0 to 8 0 V tALC ALC output voltage 4 to 0 V yNC No connection u13 8V 13 8 V output when power is ON 1 A max SW Position Operation S1 A default The tuner operating condition is set ...

Page 105: ...50 MHz 60 dB Carrier suppression More than 40 dB Unwanted sideband More than 50 dB Microphone 8 pin modular jack 600 Ω connector KEY connector 3 conductor 6 35 d mm 1 4 Receiver Receive system Double conversion superheterodyne Intermediate frequencies 1st 64 455 MHz 2nd 455 kHz Sensitivity at pre amp ON typical Squelch sensitivity threshold preamp ON SSB CW RTTY AM Less than 5 6 µV FM Less than 0 ...

Page 106: ...NARROW FILTER 250 Hz 6 dB FL 222 SSB NARROW FILTER 1 8 kHz 6 dB FL 257 SSB WIDE FILTER 3 3 kHz 6 dB SM 20 DESKTOP MICROPHONE Includes UP DOWN switches and a low cut function The OPC 589 is necessary to use this microphone SP 7 EXTERNAL SPEAKER Compact speaker for base station opera tion Height can be adjusted for your conve nience Input impedance 8 Ω Max input power 5 W CT 17 CI V LEVEL CONVERTER ...

Page 107: ...7 SEPARATION CABLE Provide front panel detached operation for mobile installations or compact transceiver operation OPC 581 3 5 m 11 5 ft OPC 587 5 m 16 4 ft OPC 589 MICROPHONE ADAPTOR CABLE Conversion between 8 pin modular and 8 pin metal connector for using a desktop mi crophone with the IC 703 OPC 599 ADAPTOR CABLE 13 pin ACC connector to 7 pin 8 pin ACC connector PS 125 DC POWER SUPPLY Light w...

Page 108: ...T 25 SPLIT LOCK 26 SPL OFFSET 27 SCAN RESUME 28 SCAN SPEED 29 U D SPEED 30 AM NB 31 A TUNE STRT 32 PTT TUNE 33 TUNER SW 34 35 36 9600 MODE 37 SPEECH LANG 38 SPEECH SPD 39 S LVL SPCH 40 41 42 43 CI V 731 CI V TRN CI V BAUD CW side tone level limit Frequency shift setting Display backlighting Key switch backlighting Light timer setting LED brightness Automatic power OFF Current intercept point Sub d...

Page 109: ... sec SSB AM in memory mode CW RTTY FM S3 7 14 21 S4 ANF NR NRL G1 BAND scope G2 SWR Graph G3 TX freq G4 Memory name 1 4 M4 AGC SSB D DISPLAY DISPLAY DISPLAY DISPLAY MENU MENU Y Y M CH No Q1 RF POWER RF POWER RF POWER Q2 MIC GAIN KEY SPEED RTTY REV Q3 CARRIER Frq 1 CW REV SSB AM FM mode CW mode RTTY mode RF POWER CAR SIDE SSB D mode 1 SSB mode only MODE DISPLAY MENU MENU 18 ...

Page 110: ...d that radiation vertically downwards is at unity gain sidelobe suppression is equal to main lobe gain This is true of almost every gain antenna today Exposed persons are assumed to be beneath the antenna array and have a typical height to 1 8 m The figures assume the worst case emission of con stant carrier For the bands 10 MHz and higher the following power density limits have been recommended 1...

Page 111: ...easurements have been performed Version where applicable Signature T Maebayashi General Manager Authorized representative name Icom Europe GmbH Himmelgeister straße 100 D 40225 Düsseldorf Place and date of issue Düsseldorf 14th Mar 2003 Version and frequency coverage Europe 02 12 Receive 0 500 29 999 MHz 50 000 54 000 MHz Transmit 1 800 1 999 MHz 3 500 3 800 MHz 7 000 7 100 MHz 10 100 10 150 MHz 1...

Page 112: ...inted in Japan 2003 Icom Inc Intended Country of Use GER FRA ESP SWE AUT NED POR DEN GBR BEL ITA FIN IRL LUX GRE SUI NOR IC 703 02 12 Europe HF 50 M Intended Country of Use GER FRA ESP SWE AUT NED POR DEN GBR BEL ITA FIN IRL LUX GRE SUI NOR IC 703 10 20 Italy HF only ...

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