method of updating information began last year and has proven very popular. MT compliments the staff for making this improvement for the benefit of their readers. As a reference, WRTH remains the most comprehensive guide to broadcasting, and should be present in every listening post. This information-packed volume is a must-have! WRTH 2005 (BOK03-05) is available from Grove Enterprises http://www.grove-ent.com for $26.95 plus S/H (product # BOK 03-05), or call 1-800-438-8155. Gayle Van Horn MT Frequency Manager

ICOM IC756PROIII

Icom America Inc. has upgraded the popular IC-756PROII with a number of significant new features incorporated into its IC756PROIII. The number one reason for upgrading to a PROIII is the improved receiver performance, says Ray Novak N9JA, National Sales Manager. The lower distortion at all stages of the receiver means better handling of strong signals and a quieter band. Worldwide, better receiver performance is the number one desire of HF operators. The biggest improvement was increasing strong-signal linearity, followed by the improved bandpass filters and roofing filter. If you have nearby amateur or shortwave-broadcast transmitters, youll really notice the difference. The PROIII is a state-of-theart HF transceiver designed for high performance in demanding conditions, such as contesting and DXing. The PROIII uses 32-bit Digital Signal Processing and fully customizable filters in both receiver and transmitter. The Real-Time Spectrum Scope on the bright, high-contrast TFT color LCD screen continues to be one of the 756PRO familys unique features. The PROIII now offers a mini-scope, an inset spectrum display visible even while
using other functions or configuring features. A screen-saver feature is now provided along with dual clocks. The PROIIIs transmitter has been upgraded with adjustable SSB transmit filter bandwidth and more than 100 different audio equalization settings. With a built-in RTTY modulator/demodulator, the PROIII is a self-contained RTTY station. 60-meter band transmit coverage is also available. Of course, the PROIII inherits the whole of the PROIIs feature set, including 32-bit floating-point DSP, 24-bit audio, powerful notch and noise reduction capabilities, dual watch, and special features to make digital mode operating a breeze. The IC-756PROIII is available at $3676.00 retail and is available from any authorized Icom America Amateur Radio dealer. For a dealer in your area or to download the IC756PROIII brochure please check at http://www.icomamerica.com.
For example, we have eliminated the proprietary battery pack and removed the need for an add-in board for APCO 25, reduced the size of the model, and added a backlit keypad.
Eton Porsche Satellite Radio
At Januarys CES Show, Eton Corporations Porsche Design division revealed the desktop P7131 and palm-sized P7132 digital radio set which incorporate AM/FM/ shortwave and XM satellite radio in the U.S. It will be launched as
a Digital Audio Broadcast radio in the UK. We are proud of it because it has the sound quality for the audiophile and the looks for the design-conscious consumer, said an Eton spokesperson. The Porsche radio is set to go on sale at the end of January in the US and in the first quarter of 2005 in the UK. In the US it is expected to cost $250.

WiNRADiO AX-37 UHF Beam

An MT review by Bob Grove
Much attention in the past has been given to antennas for under 1 GHz, but not until the recent advent of wireless computer networks has adequate thought been given to high-gain microwave antennas. With the soaring volume of products for the 2.4 GHz band, alert manufacturers sense a good market here. One such example is the new WiNRADiO AX-37E series of antennas, covering 300-3000 MHz. These UHF, log-periodic, dipole arrays pack a wallop with their 6 dBi isotropic gain (4dBd) bolstered by their built-in, 20 dB preamplifiers. Passive models (AX-37A and AX-37EN) for transmitting or receiving are available without the preamp. Since antennas are small, and power is often low in the microwave spectrum, high gain can mean a substantial improvement in received signal strengths without the risk of the overload consequences which plague lower-frequency receiving systems. Additionally, in RF-dense environments, a directional antenna can discriminate among a multitude of potentially-disruptive signals. The original AX-37A is a planar array etched on an open circuit board. The new AX-37E and AX-37EN (amplified and passive, respectively) are packaged in hermetically-sealed housings to meet the stringent requirements of outdoor installations. The specifications for these two new releases are virtually identical to those of the original model. The low-noise preamp of the AX-37E produces only 2 dB of noise and presents an impressive third-order intermod figure (IP3) of +26 dBm. The required 12 VDC @ 65 mA is delivered to the enclosed preamp through an SMA connector, requiring an optional power supply, T and cabling. Both antennas exhibit a VSWR of 1.4:1 and exhibit a front-to-back signal ratio of 16 dB. Each is mounted in an 11.5 x 8.4 housing with a total weight of only 2.6 lbs. Mast-mounting brackets are included. The WiNRADiO AX-37 antennas are available from Grove Enterprises, the North American distributor for WiNRADiO products (7540 Hwy 64 West, Brasstown NC 28902; 800-438-8155; http://www.groveent.com)

Bearcat BCD396T Coming

Uniden America Corporation announced a new handheld digital scanner, the Bearcat BCD396T, at the Consumer Electronics Show (CES) in January. The BCD396T offers APCO 25 digital capability, Close Call RF Capture Technology, Dynamic Memory Management, Fire Tone-Out as well as 5,500 channels and a frequency range of 25MHz to 1300MHz, excluding cellular. This new model has not been FCC type-accepted and wont hit the shelves until late summer 2005. With the BCD396T, we listened to our consumers and have incorporated their feedback on features they wanted, into a high-quality product that meets the demands of both professionals, such as law enforcement officials, and scanner enthusiasts, said Paul Opitz, Uniden Product Manager.

COMP OFF WIDE

Enters the noise blanker level set mode when pushed for 1 sec. @0 BALANCE CONTROL [BAL] (inner control; p. 63) Adjusts the audio output balance between main and sub readout frequencies while in dualwatch.
Turns the speech compressor ON and OFF in SSB mode. (p. 67) Switches the narrow, middle or wide transmit lter when pushed for 1 sec.
Increases main readout gain
Increases sub readout gain
What is the speech compressor?
The speech compressor compresses the transmitter audio input to increase the average audio output level. Therefore, talk power is increased. This function is effective for long distance communication or when propagation conditions are poor.

TWIN PBT

CHANGE

3.24 50

Y Z MW

PBT CLR NOTCH

DUAL WATCH
VFO/ MEMO M.SCOPE MAIN/ SUB

F-INP ENT

M-CL TS

CW PITCH

#5 #4 #3 #2

#1 #0 @9

F-1 SSB
COMP BK-IN DELAY KEY SPEED

F-2 CW/RTTY

F-3 AM/FM

F-4 FILTER

REC/PLAY LOCK/SPEECH
@1 LCD FUNCTION SWITCHES [F-1][F-5] Push to select the function indicated in the LCD display above these switches.
@2 MODE SWITCHES Selects the desired mode. (p. 29)
Announces the selected mode when an optional UT-102 is installed. (pgs. 101, 104)
@5 REC/PLAY SWITCH [REC/PLAY] (p. 72) Push momentarily to playback the recorded contents in the channel R4 of the voice memory. Push for 1 sec. to record the receiving signal contents into the channel R4 (max. 15 sec.) of the voice memory. @6 TUNING DIAL (p. 25) Changes the displayed frequency, selects set mode settings, etc. @7 LOCK/SPEECH SWITCH [LOCK/SPEECH] Push momentarily to toggle the dial lock function ON and OFF. (p. 64) Push for 1 sec. to announce the S-meter indication and the selected readout frequency when an optional UT-102 is installed. (p. 104) @8 RIT/TX CONTROL [RIT/TX] (pgs. 58, 68) Shifts the receive and/or transmit frequency without changing the transmit and/or receive frequency while the RIT and/or TX functions are ON.
Rotate the control clockwise to increase the frequency, or rotate the control counterclockwise to decrease the frequency. The shift frequency range is 9.999 kHz in 1 Hz steps (or 9.99 kHz in 10 Hz steps).

[AGC]: MID*1 [VOX],*2 [BK-IN],*2 [RTTY FIL]*2: OFF
[LOCK]: OFF *1 FAST in FM mode. *2 Appears in some modes.
Turn power ON, then check the display. If any of the following indicators appear, turn them OFF as follows: Quick tuning step indicator : Push [TS]. 1 Hz frequency readout : Push [TS] for 2 sec. (while quick tuning step is OFF) RIT indicator RIT : Push [RIT]. TX TX indicator TX : Push [TX]. Split indicator SPLIT : Push [SPLIT].
: Push [DUAL WATCH]. Twin peak lter indicator TPF : Push [RTTY FIL]. Auto notch indicator A N : Push [NOTCH]. Manual notch indicator M N : Push [NOTCH].

DUAL-W

Dualwatch indicator

BASIC OPERATION

VFO description
VFO is an abbreviation of Variable Frequency Oscillator, and traditionally refers to an oscillator. The transceivers VFO is somewhat different. The VFO of the IC-756PROIII acts like a computers window and can show one frequency and one operating mode. You can call up a desired frequency to the VFO with the keypad, memo pad-read switch (see p. 81) or the memory transfer function (see p. 79). You can also change the frequency with the tuning dial and select the operating mode with the mode switches. During dualwatch or split frequency operation, the sub VFO is functional (non-outline, non-spotted, larger frequency characters). While pushing [XFC] during split frequency operation, you can change the transmit readout frequency with the keypad, memo pad-read switch or the memory transfer function.

Select

MODE SWITCHES

21.076.50 CW

Change Transfer Transfer Transfer
TUNING DIAL MEMORY CHANNEL 7.001 MHz
KEYPAD (BAND KEY) 21.295 MHz

MEMO PAD 28.025 MHz

Differences between VFO mode and memory mode
VFO MODE VFO shows a frequency and operating mode. If the frequency or operating mode is changed, the VFO automatically memorizes the new frequency or new operating mode. When a VFO is selected from another band or memory mode, the frequency and operating mode last used for that VFO appear. [EXAMPLE]

VFO is selected.

MEMORY MODE (pgs. 7680) Each memory channel shows a frequency and operating mode like a VFO. Even if the frequency or mode is changed, the memory channel does not memorize the new frequency or operating mode. When the memory channel is selected from another memory channel or VFO mode, the memorized frequency and operating mode appear. [EXAMPLE]
Memory channel 1 is selected.

TX TX VFO

VFO VFO 14.100.00 USB
The frequency is changed.

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Memory mode is selected.
Another memory channel is selected.

500 SFT

wq.puy.tp

VFO VFO 14.123.00 USB

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VFO is selected again.

Memory channel 1 is selected again.
Changed frequency (14.123 MHz) appears.
Changed frequency (14.123 MHz) does not appear and memorized frequency (14.100 MHz) appears instead.
Selecting VFO/memory mode

[VFO/MEMO]

Push [VFO/MEMO] to switch between VFO and memory modes.
VFO appears when VFO mode, or the selected memory channel number appears when memory mode is selected beside the frequency readout. Pushing [VFO/MEMO] for 1 sec. transfers the contents of the selected memory channel to VFO mode. (p. 79)

VFO indicator

BW 500

qr.qot.pp

1 14.100.00 USB

Memory channel number

VFO VFO 14.195.00 CW

Main/Sub band selection

[MAIN/SUB]
Push [MAIN/SUB] to select access to the main or sub readout.
The sub readout frequency is displayed in outline or mesh font. The sub readout functions only during split oeration or dualwatch.
Selecting an operating band

Band keys

The triple band stacking register provides 3 memories in one band. 3 sets of a frequency and operating mode on each band are automatically stored when used. If a band key is pushed once, the frequency and operating mode last used are called up. When the key is pushed again, another stored frequency and operating mode are called up. This function is convenient when you operate 3 operating modes on one band. For example, one register is used for a CW frequency, another for an SSB frequency and the other one for an RTTY frequency. See the table below for a list of the band available and the default settings for each band.
BAND 1.8 MHz 3.5 MHz 7 MHz 10 MHz 14 MHz 18 MHz 21 MHz 24 MHz 28 MHz 50 MHz General
REGISTER 1 1.900000 MHz CW 3.550000 MHz LSB 7.050000 MHz LSB 10.120000 MHz CW 14.100000 MHz USB 18.100000 MHz USB 21.200000 MHz USB 24.950000 MHz USB 28.500000 MHz USB 50.100000 MHz USB 15.000000 MHz USB

REGISTER 2 1.910000 MHz CW 3.560000 MHz LSB 7.060000 MHz LSB 10.130000 MHz CW 14.200000 MHz USB 18.130000 MHz USB 21.300000 MHz USB 24.980000 MHz USB 29.500000 MHz USB 50.200000 MHz USB 15.100000 MHz USB
REGISTER 3 1.915000 MHz CW 3.580000 MHz LSB 7.020000 MHz CW 10.140000 MHz CW 14.050000 MHz CW 18.150000 MHz USB 21.050000 MHz CW 24.900000 MHz CW 28.100000 MHz CW 51.000000 MHz FM 15.200000 MHz USB
D Using the band stacking registers

[Example]: 14 MHz band

q Push [(14)5], then select a frequency and an operating mode.
Frequency and operating mode are memorized in the rst band stacking register.
w Push [(14)5] again, then select another frequency and operating mode.
This frequency and operating mode are memorized in the second band stacking register.
e Push [(14)5] again, then select another frequency and operating mode.
This frequency and operating mode are memorized in the third band stacking register. When a fourth frequency and operating mode are selected on a band, the rst register set in step q, is over written.

Frequency setting

The transceiver has several tuning methods for convenient frequency tuning.
D Tuning with the tuning dial
q Push the desired band key on the keypad 13 times.
3 different frequencies can be selected on each band with the band key. (See previous page Using the band stacking register.)

wq.wpp.pp

Tuning dial
w Rotate the tuning dial to set the desired frequency.

wq.wot.pp

If the dial lock function is activated, the lock indicator lights, and the tuning dial does not function. In this case, push [LOCK/SPEECH] to deactivate the lock function.
D Direct frequency entry with the keypad
The transceiver has a keypad for direct frequency entry as described right.

Keypad

q Push [(F-INP)ENT].

appears.

w Input the desired frequency.
Push [(GENE)] to input (decimal point) between the MHz units and kHz units.
e Push [(F-INP)ENT] to set the input frequency.
To cancel the input, push [MAIN/SUB] instead of [(F-INP)ENT].

[EXAMPLE]

14.025 MHz

F-INP 5 ENT

18.0725 MHz
F-INP F-INP F-INP F-INP F-INP 7 ENT 5 ENT 6 ENT ENT ENT
706 kHz 5.100 MHz 7.000 MHz 21.280 21.245

D Quick tuning step

The operating frequency can be changed in kHz steps (0.1, 1, 5, 9, 10, 12.5, 20 or 25 kHz selectable) for quick tuning.

q Push [TS] momentarily to turn the quick tuning function ON.
Z appears when the quick tuning function ON.
w Rotate the tuning dial to change the frequency in programmed kHz steps. e Push [TS] again to turn the quick tuning function OFF.
Tuning dial Z disappears.
r Rotate the tuning dial for normal tuning if desired.

D Selecting kHz step

q Push [TS] momentarily to turn the quick tuning step ON.
w Push [TS] for 1 sec. to enter the tuning step setting display.
Selected tuning steps for all modes appear.
AGC MID VOX OFF COMP OFF WIDE

RTTY 1

FM 10 (kHz)

Mode selection

e Select the desired operating mode. r Rotate the tuning dial to select the desired tuning step from 0.1, 1, 5, 9, 10, 12.5, 20 or 25 kHz.
Push [(F-3)DEF] to return to the default setting, if desired.
t Repeat steps e and r to select quick tuning steps for other modes, if desired. y Push [EXIT/SET] to exit the setting display.

D Selecting 1 Hz step

The minimum tuning step of 1 Hz can be used for ne tuning.
q Push [TS] to turn OFF the quick tuning step.

does not appear.

w Push [TS] for 1 sec. to turn the 1 Hz tuning step ON and OFF.
RIT and/or TX also functions in 1 Hz tuning step when used. 1 Hz step indicator

METER Po P.AMP 1

qr.qot.ppp

14.100.00 USB

ATT 0FF AGC MID VOX OFF COMP OFF WIDE

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D 14 tuning function (SSB data/CW/RTTY only)
While operating in SSB data/CW/RTTY, the 14 tuning function is available for critical tuning. Dial rotation is reduced to 14 of normal when the 14 function is in use. Push [1/4] to toggle the 14 function ON and OFF.

tuning function OFF

tuning function ON

1/4 ON

D Auto tuning step function
When rotating the tuning dial rapidly, the tuning speed accelerated automatically as selected. q Push [EXIT/SET] several times to close a multifunction screen, if necessary. w Push [EXIT/SET] for 1 sec. to select the set mode menu screen. e Push [(F-5)OTHERS] to enter miscellaneous (others) set mode. r Push [(F-1)Y] or [(F-2)Z] to select MAIN DIAL Auto TS. t Rotate tuning dial to select the desired condition from high, low and OFF.

Meter function

The transceiver has 4 transmit meter functions for your convenience. Select the desired meter with the [METER] switch. In addition, the transceiver can display the multi-function digital meter in the LCD display, which displays all transmit meters simultaneously.

Analog transmit meter

Push [METER] to select RF power (Po), SWR, ALC or compression level (COMP).

[METER] switch

Multi-function digital meter
q Push [METER] for 1 sec. to turn the multi-function digital meter ON. w Push [(F-1)P-HOLD] to toggle the peak level hold function ON or OFF.
P-HOLD appears on the window title when the peak level hold function is turned ON.
DISPLAY INDICATION Po SWR
MEASUREMENT Indicates the relative RF output power in %. Indicates the SWR over the transmission line. Indicates the ALC level. When the meter movement shows the input signal level exceeds the allowable level, the ALC limits the RF power. In such cases, reduce the [MIC GAIN] control. Indicates the compression level when the speech compressor is in use.
ATT OFF AGC MID VOX OFF COMP OFF WIDE

P-HOLD

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P-HOLD S Po ALC COMP SWR 1 1.2.5 3

14.100.00

MULTI-FUNCTION METER
. 1. 3. 5. 7. 9. +20.+40.+ d B.+20.+40.+ 50 100%
e Push [METER] for 1 sec. or push [EXIT/SET] to turn the multi-function digital meter OFF.

SWR reading

The SWR meter indicates the SWR over the transmission line in all modes.

Less than 1.5:1

SWR meter
q Push [TUNER] to turn the antenna tuner OFF. w Push [METER] several times to select the Po meter. e Push [CW/RTTY] once or twice to select RTTY mode. r Push [TRANSMIT]. t Rotate [RF POWER] clockwise past the 12 oclock position for more than 30 W output power (30%). y Push [METER] once to select the SWR meter as the transmit meter. u Read the SWR on the SWR meter.
The built-in antenna tuner matches the transmitter to the antenna when the SWR is lower than 3 : 1.

Basic transmit operation

Before transmitting, monitor your selected operating frequency to make sure transmitting wont cause interference to other stations on the same frequency. Its good Amateur practice to listen rst, and then, even if nothing is heard, ask is the frequency in use once or twice, before you being operating on that frequency.

Check the interfering tone. Push

[CW/RTTY]

for 1 sec.
BFO Interference Desired signal CW mode (LSB side) BFO Interference Desired signal CW-R mode (USB side)

D About CW pitch control

The received CW audio pitch and monitored CW audio can be adjusted to suit your preference (300 to 900 Hz in 25 Hz steps) without changing the operating frequency. Rotate [CW PITCH] to suit your preference.
Adjustable within 300 to 900 Hz in 25 Hz steps. [CW PITCH]
The lter set mode screen graphically displays the CW pitch operations. (See at left.)
AGC MID BK-IN OFF 1/4 OFF BW FILTER CW 950 PBT1 PBT2 DEF FIL FI 1 FIL FI 2 FIL FI 3 1.2k 500 250

D CW side tone function

When the transceiver is in the receive condition (and the break-in function is OFF p. 66) you can listen to the tone of your CW signal without actually transmitting. This allows you to match your transmit signal exactly to another stations. This also convenient for CW practice.
[(F-1)Y] [(F-2)Z] [EXIT/SET]
Push [EXIT/SET] for 1 sec. then [(F-1)LEVEL] to enter level set mode. Select an item with [(F1)Y]/[(F-2)Z] then rotate the tuning dial to adjust the side tone level.
D About 137 kHz band operation (Europe, UK, Italy, Spain, France versions only)
137 kHz band, within 135.7 kHz to 137.8 kHz range, operation in CW mode is optionally available with the IC-756PROIII. The RF signal from [XVERT] is used for the 137 kHz band operation, and an external amplier unit is necessary. See the connection diagram below for reference. Connection diagram for 137 kHz band operation
Power amplifier with T/R switching unit for 137 kHz to [XVERT]

BPF or LPF

to [SEND] (for transmit/receive control) to [ACC(2)] pin 6* *Transverter ON/OFF control signal related to the power amplifier unit main power, if desired. ON: 213.8 V DC input (more than 10 k impedance) OFF: Less than 2 V DC

Electronic CW keyer

[(F-1)][(F-4)]
The IC-756PROIII has a number of convenient functions for the electronic keyer that can be accessed from the memory keyer menu. q Push [EXIT/SET] several times, if necessary. w Push [CW/RTTY] to select CW mode. e Push [(F-3)KEYER] then [EXIT/SET] to select memory keyer menu screen. r Push one of the multi-function keys ([F-1] to [F-4] to select the desired menu. See the diagram below.
Push [EXIT/SET] to return to the previous indication.

[CW/RTTY] [EXIT/SET]

METER Po P.AMP 1 ATT 0FF AGC MID BK-IN OFF

21. 085. 00 CW

21. 085. 00

Memory keyer edit screen

ABC M1 MEMORY KEYER MEMORY KEYER CQ TEST CQ TEST DE ICOM ICOM TEST UR 5NN001 BK CFM TU QRZ?

Memory keyer send screen

AGC MID BK-IN OFF 1/4 OFF M1 MEMORY KEYER MEMORY KEYER M1 M2 M3 M4 CQ TEST CQ TEST DE ICOM ICOM TEST UR 5NN001 BK CFM TU QRZ? M2 M3 M4 -1

Contest number set mode

AGC MID BK-IN OFF KEYER 001 Number Style Coun t Up Trigger Present Number Normal M2 001
EXIT/SET Memory keyer menu screen
AGC MID BK-IN OFF 1/4 OFF SEND MEMORY KEYER MEMORY KEYER MENU MEMORY KEYER MENU SEND SEND EDIT EDIT Max.55 Characters 4ch Max.55 Characters 4ch Memory Editor Memory Editor 001 Style Contest Number 001 Style Contest Number

Keyer set mode screen

AGC MID BK-IN OFF KEYER CW-KEY KEYER CW-KEY Keyer Repeat Time Keyer Repeat Time Dot/Dash Ratio Dot/Dash Ratio Rise Time Rise Time Paddle Polarity Paddle Polarity Keyer Type Keyer Type MIC Up/Down Keyer MIC Up/Down Keyer 2s 2s 1:1:3.0 1:1:3.0 4ms 4ms Normal Normal E L E C - K EY ELEC-KEY OFF OFF
CW KEY Memo-key,Elec-key,CW Wave Form Set CW KEY Memo-key,Elec-key,CW Wave Form Set EDIT 001 CW KEY
D Memory keyer send screen
Pre-set characters can be sent using the keyer send menu. Contents of the memory keyer are set using the edit menu.
[TRANSMIT] [(F-1)M1][(F-4)M4]

Transmitting

q Push [EXIT/SET] several times, if necessary. w Push [CW/RTTY] to select CW mode. e Push [(F-3)KEYER] to select the memory keyer screen. r Push [TRANSMIT] to set the transceiver to transmit, or set the break-in function ON (p.60). t Push [(F-1)M1] [(F-4)M4] momentarily to transmit the contents one time; push these keys for 1 sec. to transmit the contents repeatedly.
M1M4 are highlighted while transmitting. appears while transmitting repeatedly. Set the repeat interval of the memory keyer to 1, 2, 3, 10 or 30 sec. See the previous page for keyer set mode. To count down the contact number, push [(F-5)1].
MEMORY K E Y E R M E M O R Y KEYER M1 M2 M3 CQTESTCQTESTDEICOMICOM TEST UR5NN001BK CFMTU QRZ?

1/4 OFF M1

For your information When an external keypad is connected to the pin 3 and pin 7 of the [MIC] connecter, the programmed contents, M1M4, can be transmitted without opening the memory keyer screen. See page 103 for details. y Push [EXIT/SET] twice to exit the memory keyer screen.

D Editing a memory keyer

The contents of the momory 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, contest number, etc. Total capacity of the memory keyer is 70 characters per memory channel.
[123]/[etc] [ABC] [(F-3)DEL] [(F-4)SPACE]

Programming contents

q Push [EXIT/SET] several times, if necessary. w Push [CW/RTTY] to select CW mode. e Push [(F-3)KEYER] then [EXIT/SET] to select keyer set mode. r Push [(F-2)EDIT] to enter the keyer edit screen. t Push [(F-5)M1.M4] several times to select the desired keyer memory channel. y Select the desired character group by pushing the character group keys ([ABC], [123] or [etc]) several times.

Push [(F-3)DEF] to select the default condition.
r Push [EXIT/SET] to exit the RTTY decoder screen. The UnShift On Space (USOS) function and new line code can be set in the RTTY set mode. (p. 49)
D RTTY memory transmission
Pre-set characters can be sent using the RTTY memory. Contents of the memory are set using the edit menu. q Push [EXIT/SET] several times to close a multifunction screen, if necessary. w Push [CW/RTTY] to select RTTY mode. e Push [(F-3)DECODE] to turn the RTTY decoder ON. r Push [(F-3)TX MEM] to select RTTY memory screen. t Push [(F-5)1-4/5-8] to select memory bank then push one of the function keys [(F-1)RT1] to [(F4)RT4] or [(F-1)RT5] to [(F-4)RT8].
The selected memory contents will be transmitted immediately.
[(F-1)RT1][(F-4)RT4] [(F-1)RT5][(F-4)RT8]
[EXIT/SET] [(F-5)1-4/5-8]

0 RTTY RTTY FIL2

METER Po P.AMP 1 ATT 0FF AGC MID RTTY FIL ON 1/4 OFF

DE DE Q SL SL Q SL SL

RTTY MEMORY ICOM ICOM ICOM ICOM K

RT1 RT2 RT3 RT4

ICOM ICOM UR UR DE DE

ICOM ICOM

ICOM ICOM K BK BK UR UR 599-599 599-599 BK BK
599-599 599-599 ICOM ICOM

1-4/5-8

D RTTY tuning meter
The transceiver has an RTTY tuning indicator to be tuned correctly and easily. The RTTY tuning meter is automatically displayed when the RTTY lter is turned ON. q Push [CW/RTTY] to select RTTY mode. w Push [RTTY FIL] to activate the RTTY filter and RTTY tuning meter.

RTTY tuning meter

BW 350 SFT 0 FIL2

D Editing RTTY memory

The contents of the RTTY memories can be set using the memory edit menu. The memory can memorize and re-transmit 8 RTTY contents for often-used RTTY sentences. Total capacity of the memory is 70 characters per memory channel.
q Push [EXIT/SET] several times, if necessary. w Push [CW/RTTY] to select RTTY mode. e Push [(F-3)DECODE] then [(F-1)MENU1] to select the RTTY decode menu 2. r Push [(F-2)EDIT] to enter the RTTY memory edit screen. t Push [(F-5)RT1.8] several times to select the desired memory channel. y Select the desired character group by pushing the character group keys ([ABC], [123] or [etc]) several times.

Operating FM

q Push a band key to select the desired band. w Push [AM/FM] to select FM.
FM indicator appears. After FM mode is selected, push [AM/FM] to toggle between FM and AM modes.
The S-meter indicates received signal strength when signal is received. 10 kHz tuning step is preset for FM mode.
Notch lter (p. 64) Push [NOTCH] switch to turn the auto notch function ON and OFF.
Rotate [NOTCH] control to set the attenuating frequency for manual notch operation. Notch indicator (in [NOTCH] switch) lights when the auto notch is set to ON.
Transmit quality monitor (p. 64) Push [MONITOR] to turn the monitor function ON and OFF.

Repeater operation

A repeater amplies received signals and retransmits them at a different frequency. When using a repeater, the transmit frequency is shifted from the receive frequency by an offset frequency. A repeater can be accessed using split frequency operation with the shift frequency set to the repeaters offset frequency. For accessing a repeater which requires a repeater tone, set the repeater tone frequency in set mode as described below. q Set the offset frequencies (HF, 50 MHz) and turn ON the quick split function in set mode (others) in advance. (p. 69) w Push [VFO/MEMO] to select VFO mode.
Setting the repeater tone
Some repeaters require subaudible tones to be accessed. Subaudible tones are superimposed over your normal signal and must be set in advance. The transceiver has 50 tones from 67.0 Hz to 254.1 Hz. Each memory channel can store an independent setting. q Select FM mode. w Push [TONE] for 1 sec. to enter tone set mode. e Push [(F-1)] to select the repeater tone item. r Rotate the tuning dial to select the desired repeater tone frequency.
AGC FAST VOX OFF TONE OFF

DEF T-SCAN

TONE FREQUENCY

METER Po P.AMP 1 ATT OFF

REPEATER TONE T-SQL TONE

88.5Hz 88.5Hz

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t Push [EXIT/SET] to exit tone set mode. Available repeater tones
67.0 69.3 71.9 74.4 77.0 79.7 82.5 085.4 088.5 091.5 094.8 097.4 100.0 103.5 107.2 110.9 114.8 118.8 123.0 127.3 131.8 136.5 141.3 146.2 151.4 156.7 159.8 162.2 165.5 167.9 171.3 173.8 177.3 179.9 183.5 186.2 189.9 192.8 196.6 199.5 203.5 206.5
e Push the desired band key. r Push [AM/FM] several times to select FM mode. t Set the receive frequency (repeater output frequency).

(Unit: Hz)

210.7 254.1 218.1 225.7 229.1 233.6 241.8 250.3

15k SFT

0 FM FIL2

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CONVENIENT Store repeater tone frequencies and ON/OFF settings in memory channels for easy recall.
y Push [SPLIT] for 1 sec. to start repeater operation.

Repeater tone is turned ON automatically. Shifted transmit frequency and TX appear in the sub readout. The transmit frequency can be monitored while pushing [XFC] or using dualwatch.

0 FM FIL2 TONE

1 14.100.00 SPLIT SPLIT USB TONE

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Shifted frequency appears.
Tone encoder is automatically turned ON.
u Push and hold [PTT] to transmit; release [PTT] to receive. i To return to simplex, push [SPLIT] momentarily to clear the sub display.

Tone squelch operation

The tone squelch opens only when receiving a signal containing a matching subaudible tone. You can silently wait for calls from group members using the same tone. q Push [VFO/MEMO] to select VFO mode.
Setting the tone squelch tone
The transceiver has 50 tones from 67.0 Hz to 254.1 Hz. q Select FM mode. w Push [TONE] for 1 sec. to enter tone set mode. e Push [(F-2)] to select the tone squelch tone item. r Rotate the tuning dial to select the desired tone squelch frequency.
w Push the desired band key. e Push [AM/FM] several times to select FM mode. r Push [TONE] several times until TSQL appears in the function display.
t Push [EXIT/SET] to exit tone set mode. Available tone squelch tones

0 FM FIL2 TSQL

1 14.100.00 USB TSQL
t When the received signal includes a matching tone, squelch opens and the signal can be heard.
When the received signals tone does not match, tone squelch does not open, however, the S-indicator shows signal strength. To open the squelch manually, push [XFC].
CONVENIENT Store tone squelch frequencies and ON/OFF settings in memory channels for easy recall.
y Operate the transceiver in the normal way. u To cancel the tone squelch, push [TONE] to clear TSQL.
Data mode (SSTV/PSK31) operation
When operating SSTV or PSK31 with your PC software, consult the manual that comes with the software. q Connect a PC to the transceiver. (p. 19) w Push a band key to select the desired band. e Push [SSB] or [AM/FM] to select the desired operating mode. r Push the same key for 1 sec. to turn data mode ON.
-D indicator additionally appears.
t Rotate the main dial to tune into the desired signal and decoded correctly.
Also use the tuning indicator of the software. During SSB data mode, 14 tuning function can be used for critical tuning.

Dial lock function

The dial lock function prevents changes by accidental movement of the tuning dial. The lock function electronically locks the dial. Push [LOCK/SPEECH] to toggle the dial lock function ON and OFF.
The [LOCK] indicator lights when the dial lock function is in use. [LOCK] indicator

[LOCK/SPEECH] switch

FUNCTION FOR TRANSMIT

VOX function

The VOX (Voice-Operated Transmission) function switches between transmit and receive with your voice. This function provides an opportunity to input log entries into your computer, etc., while operating.

D Using the VOX function

q Select a phone mode (SSB, AM, FM). w Push [VOX] to turn the VOX function ON or OFF.
VOX ON appears while the VOX is in use.
D Adjusting the VOX function
q Select a phone mode (SSB, AM, FM). w Push [VOX] to turn VOX function ON. e Push [VOX] for 1 sec. to enter VOX set mode. r Select the VOX gain item using [(F-1)Y] or [(F2)Z]. t While speaking into the microphone, rotate the tuning dial to the point where the transceiver is continuously transmitting. y Adjust the VOX delay for a convenient interval before returning to receive.
- Select the VOX delay item using [(F-1)Y] or [(F-2)Z]. - Rotate the tuning dial.
u If the receive audio from the speaker switches to transmit, adjust the anti VOX to the point where it has no effect.
VOX Gai n Anti-VOX VOX Del a y

50% 50% 0.2s

Break-in function
The break-in function is used in CW mode to automatically toggle the transceiver between transmit and receive when keying. The IC-756PROIII is capable for full break-in or semi break-in.
D Semi break-in operation
During semi break-in operation, the transceiver selects transmit when keying, then automatically returns to receive after a pre-set time from when you stop keying.

[BK-IN]

q Push [CW] to select CW or CW-R mode. w Push [BK-IN] several times to turn the semi breakin function ON.

BK-IN SEMI appears.

e Rotate [BK-IN DELAY] to set the break-in delay time (the delay from transmit to receive). When using a paddle, rotate [KEY SPEED] to adjust the keying speed.
[BK-IN DELAY] [KEY SPEED]
D Full break-in operation
During full break-in operation, the transceiver automatically selects transmit while keying and returns to receive immediately after keying is nished.
q Push [CW] to select CW or CW-R mode. w Push [BK-IN] several times to turn the full break-in function ON.

BK-IN FULL appears.

When using a paddle, rotate [KEY SPEED] to adjust the keying speed.
Transmit lter width setting (SSB only)
The transmit filter width for SSB mode can be selected from wide, middle and narrow. During USB or LSB mode selection, push [COMP] for 1 sec. several times to select the desired transmit lter width from wide, middle and narrow.
The lter functions regardless of the speech compressor use. The following lters are specied as the default. Each of the filter width can be re-set in level set mode. (pgs. 93, 94) WIDE : 100 Hz to 2.9 kHz MID : 300 Hz to 2.7 kHz NAR : 500 Hz to 2.5 kHz [COMP]

Speech compressor

The RF speech compressor increases average RF output power, improving signal strength and readability in SSB. y Push [METER] once to select the COMP meter. u Adjust the [COMP] control so that the COMP meter reads within 10 dB and 20 dB.

COMP meter

q Select USB or LSB mode. w Push [COMP] momentarily to turn the speech compressor ON and OFF. e Push [COMP] for 1 sec. to toggle between narrow, middle or wide transmit lter.
Transmit lter width: NAR 2.0 kHz MID 2.6 kHz WIDE 2.9 kHz
When the ALC meter peaks above the ALC zone, your transmitted voice may be distorted.
Compression level setting
q Select USB or LSB mode. w Preset the transceiver as follows: [COMP] function : OFF [METER] function : ALC [MIC GAIN] control : Center position [COMP] control : Center position [RF POWER] control : Max. counterclockwise e Transmit at your normal voice level. r Adjust the [MIC GAIN] control so that the ALC meter reads within the ALC zone, whether or not you speak softly or loudly. t Push [COMP] momentarily to turn the speech compressor ON.
[MIC GAIN] control [RF POWER] control
[COMP] switch [COMP] control

TX function

The TX function shifts the transmit frequency up to 9.999 kHz in 1 Hz steps (10 Hz steps when cancelling the 1 Hz step readout) without moving the receive frequency.
See #0 on p. 5 for function description. [CLEAR]

q Push [TX] switch.

TX and the shifting frequency appear when the TX function is ON.

[RIT/TX]

e To reset the TX frequency, push [CLEAR] for 1 sec.
Push [CLEAR] momentarily to reset the RIT frequency when the quick RIT/TX clear function is ON. (p. 102)
r To cancel the TX function, push [TX] again.
and the shifting frequency disappears.

Monitor function

The monitor function allows you to monitor your transmit IF signals in any mode through the speaker. Use this to check voice characteristics while adjusting SSB transmit tones. (p. 93) The CW sidetone functions regardless of the [MONITOR] switch setting. q Push [MONITOR].