Icom iC-706MKTMG manual 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.

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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-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 OFFVFO Mode Memory Mode pgsVFO description VFOFrequency 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 SSBCeiver maintains the ON/OFF condition when pushing F-2NR ANF Automatic Notch Filter functionNR Noise Reduction function Output 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 receiveTone 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 SP-7EXTERNAL Speaker SP-10EXTERNAL Speaker SP-12EXTERNAL SpeakerSP-20EXTERNAL Speaker SP-21EXTERNAL 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 Menu DisplayCount on us
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