Icom IC-706MKIIG Noise blanker, AGC time constant, Preamp and attenuator, Peak meter hold

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4 RECEIVE AND TRANSMIT

DNoise blanker

The noise blanker reduces pulse-type noise such as that generated by automobile ignition systems. This function is not effective for FM modes or for non pulse- type noise. If you don’t want to use the noise blanker for AM communications, the “AM noise blanker” item in Initial Set mode must be turned OFF (ON is the default setting—p. 53).

➀Select M3.

•Push [DISPLAY] 1 or 2 times when S or G is displayed.

•Push [MENU] one or more times to select M3.

➁Push [(F-2)NB] to toggle the noise blanker ON and OFF.

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

USB

NB

 

 

 

 

Appears when the

 

 

60dB VFO A

S1 3 5 7

9 20 40

noise blanker is

PO

5

10

CH

turned ON.

M3 NAR

NB

MET

DAGC time constant

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.

➀Select M4.

•Push [DISPLAY] 1 or 2 times when S or G is displayed.

•Push [MENU] one or more times to select M4.

➁Push [(F-3)AGC] to toggle the AGC time constant between fast and slow.

•“FAGC” appears when the fast time constant is selected.

USB

 

 

40 FAGC60dB

 

 

Appears when

S1 3 5 7 9

20

VFO A

PO

5

10

 

CH

AGC fast is

 

selected.

M4 VOX COM AGC

DPreamp and attenuator

The preamp amplifies received signals in the front end circuit to improve the S/N ratio and sensitivity. Turn this function ON when receiving weak signals.

The attenuator prevents desired signals from distort- ing when very strong signals are near the desired fre- quency or when very strong electric fields, such as from broadcasting stations, are near your location.

Push [P.AMP/ATT] momentarily to turn the preamp ON and OFF; push and hold to turn the attenuator ON.

•Lights green when the preamp is ON; lights red when the 20 dB attenuator is ON.

•Only one of these functions can be activated at a time.

P.AMP/ATT

Lights green while the preamp is activated; lights red while the attenuator is activated.

DPeak meter hold

INITIAL SET MODE

The peak meter hold function freezes the highest dis- played bar segment in any meter function for about

0.5sec. so that you can more easily read the meter. This function can be turned ON and OFF in initial set mode (see p. 51).

[EXAMPLE]:

S1

3

5

7

9

20

40

60dB

Initial reception

of a

 

 

 

 

 

 

 

 

signal results in an S-

 

 

 

 

 

 

 

 

meter reading

of 40

 

 

 

 

 

 

 

 

dB.

 

S1

3

5

7

9

20

40

60dB

The highest indicated

 

 

 

 

 

 

 

 

bar remains displayed

 

 

 

 

 

 

 

 

for about 0.5

sec.

 

 

 

 

 

 

 

 

even when the signal

 

 

 

 

 

 

 

 

strength decreases.

21

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Contents I706MKG Precautions Word Definition RwarningTable of Contents Panel Description Front panel0MAIN Dial Tension Latch 2LOCK Switch Lock @2PREAMP/ATTENUATOR Switch P.AMP/ATTFunction switches VOX Function p Speech Compressor pBREAK-IN p Function pRear and side panels When connecting the ACC conversion cable OPC-599 ACC PIN # Name Description Specifications ColorACC Socket 1DOT Matrix Indicators 3FUNCTION Indicators4DSP Indicators Function display➊UP/DOWN Switches UP/DN ➋LOCK Switch Lock ➌PTT Switch PTTMicrophone Connector HM-103 Schematic DiagramInstallation and Connections PL-259 Connector Installation ExampleUnpacking GroundingInstallation Single body mountingStand Front panel separationRequired connections Rtty TerminalAdvanced connections Power supply connections Connecting the PS-125 / PS-85 DC Power SupplyConnecting a NON-ICOM DC Power Supply Connecting a NON-ICOMConnecting the AH-4 Connecting the AT-180Connecting the IC-PW1 External antenna tuners and linear amplifierFrequency Setting When first applying power CPU resettingInitial settings Power onVFO Mode Memory Mode pgsVFO description ExampleFrequency setting Programmable tuning stepsHz and 10 Hz tuning steps Band selectionMHz quick tuning step TS Switch Flow ChartSSB/CW/RTTY modes Any mode FM/WFM/AM modes Sub dial functionMode selection Operating Mode SelectionQuick band change function ➁ Push F-1-F-3 to select a band stacking registerReceive and Transmit Functions for receiveIf shift function RIT functionNoise blanker AGC time constantPreamp and attenuator Peak meter holdRF gain and squelch Simple band scopeRF/SQL control priority Filter Presetting Optional filter selectionFilter ON/OFF SSBANF Automatic Notch Filter function NR Noise Reduction functionOutput power and mic gain Functions for transmitDMeter function Speech compressor VOX operationManual Tuning Optional AT-180 Automatic Antenna Tuner operationTuner Operation ➂ The Tuner light lights constantly when tuning is complete Optional AH-4AUTOMATIC Antenna Tuner operationAH-4 operation PTT tune functionSplit frequency operation Quick split function➀ Select VFO a and set the frequency to 7.057 MHz/CW Split lock functionRepeater operation ➄ Push and hold PTT to transmit release PTT to receive➆ To return to simplex operation, push F-1SPL Tone squelch operation Tone scan operation➅ Communicate in the usual manner ➂ Push F-3SCN to toggle tone scan operation on and OFFOne-touch repeater function Auto repeater functionThis function automatically activates the repeater set Frequency Duplex DirectionFunctions for CW Connections for CWCW operation Elec KEYCW reverse mode DElectronic CW keyer Quick SET ModeSetting the electronic keyer CW pitch controlFunctions for Rtty Connections for Rtty FSKConnections for Afsk Presetting for Rtty Rtty FSK operationRtty Afsk operation Adjusting the transmit signal output from the TNC Packet operationConnections for packet Data socketMeasuring SWR Spot measurementPlot measurement Memory and Scan Operation Memory channelsMemory channel selection Memory clearingProgramming in VFO mode Programming in memory modeMemory/call programming Frequency transferring Memory namesCalling up memory names Editing programming memory namesMemo pads Writing frequencies and operating modes into memo padsCalling up a frequency from a memo pad ➀ Select the S1 displayScan types PreparationProgrammed scan operation Memory scan operationSelect memory scan operation Priority watchRemote Jack CI-V Information CI-V connection exampleData format Command Table VFO A=BSET Mode Quick set mode operationInitial set mode operation GeneralQuick set mode items Q3 VOX Delay SSB/AM/FM onlyQ2 MIC Gain SSB/AM/FM only Q4 VOX Gain SSB/AM/FM onlyQ5 Anti VOX SSB/AM/FM only Initial set mode items RF/SQL SQL/AUTO/RFSQL Quick Split quick split function Split Lock split lockSPL Offset split offset DUP HF duplex offsetAM NB Noise blanker in AM mode PWR on CHK Power on checkAuto Rptr auto repeater Scan Resume scan resume29 9600 Mode Data socket speed Tune Strt auto tuner startPTT Tune PTT tune function Vsend SEL ACC socket outputLVL Spch S-level speech CI-V Addres CI-V addressCI-V Baud CI-V data rate CI-V TRN CI-V transceiveMaintenance Fuse replacementMemory backup CleaningTroubleshooting Power Supply Receive Problem Possible Cause SolutionTransmit Display Scan Problem Possible Cause Solution Optional INSTALLATIONS/SETTINGS Opening the transceiver caseIf filters Installation DOperationAT-180 internal switch description S2 S1 B aPIN no Description Name Internal Views Top viewBottom view Options PS-125DC Power Supply SP-7EXTERNAL SpeakerSP-10EXTERNAL Speaker SP-12EXTERNAL Speaker SP-20EXTERNAL SpeakerSpecifications + power on Power OFF then on to exit initial set modeMenu Guide Indication Description No. IndicationSSB/AM/FM mode CW mode Rtty mode Mode DisplayFor 2 sec Display MenuCount on us About CE Declaration ConformityInstallation Notes Typical amateur radio installationForward clearance, Eirp by frequency band Eirp Clearance heights by frequency bandInstallation Note About SP-7 External Speaker

I706MKTMG, IC-706MKIIG specifications

The Icom IC-706MKIIG and the Icom IC-706MKTMG are two prominent transceiver models known for their compact design and versatile capabilities. These radios cater to amateur radio enthusiasts, providing a wide range of features suitable for both HF and VHF/UHF operations.

The IC-706MKIIG is a well-regarded dual-band transceiver that operates on HF frequencies from 160 meters to 10 meters and VHF/UHF from 6 meters to 70 centimeters. One of its main features is its compact footprint, making it an excellent choice for mobile operations as well as fixed installation. The transceiver provides up to 100 watts of output power on HF and 50 watts for VHF/UHF, ensuring robust performance for various amateur applications.

On the other hand, the IC-706MKTMG brings the same foundational performance but includes enhanced features aimed at improving user experience. It boasts a high-resolution LCD display with clear visibility under varying light conditions. This model offers advanced digital signal processing (DSP) technology, enhancing audio clarity and reducing noise interference. The built-in auto notch filter and noise blanker efficiently eliminate unwanted signals, allowing users to focus on their desired contacts without distraction.

Both models support multiple modes of operation, including SSB, CW, AM, and FM, which provides versatility in how users can communicate. They feature an easy-to-navigate menu system, allowing users to access settings quickly. With built-in memories and a large number of program settings, operators can customize their experience and quickly switch between configurations.

One standout feature of the IC-706 series is its built-in antenna tuner, which helps match the transceiver to various antenna types, optimizing performance and simplifying setup. The radios also include support for external control via CAT commands, accommodating advanced integration into larger station setups.

In terms of user connectivity, both transceivers come equipped with USB ports and support sound card capabilities, enabling digital modes such as PSK31 and RTTY easily. This integration enhances versatility, catering to modern digital communications alongside traditional voice modes.

Robust, reliable, and feature-rich, the Icom IC-706MKIIG and IC-706MKTMG models stand out as exemplary choices for amateur operators looking for a compact yet comprehensive transceiver solution. Their combination of technologies and characteristics continues to make them popular in the ham radio community.
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