Icom Understanding SRFJ7044 and Its Role in Home Security System Components

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11 INTERNAL VIEWS

DTop view

Caution:

The transceiver has been thoroughly tested and adjusted at the factory before being shipped. The transceiver warranty does not cover any problems caused by unauthorized internal adjustment.

430 MHz Tx power adj.

144 MHz Tx power adj.

50 MHz Tx power adj. HF Tx power adj.

AM Tx carrier adj.

ID APC adj.

NB sencitivity adj.

The internal speaker has been removed in this diagram for illustration purposes.

FILTER unit

FM deviation adj.

MAIN unit

DBottom view

144/430 MHz Final amplifier (SRFJ7044)

HF Final amplifier (SRFJ7044 x 2)

PLL unit

PA unit

Optional crystal (CR-282)

Reference freq. check point

(60.000 MHz)

Reference freq. adj. (L601) (when optional crystal

is installed)

Image 66

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 BREAK-IN p VOX Function pSpeech Compressor p Function pRear and side panels When connecting the ACC conversion cable OPC-599 ACC PIN # Name Description Specifications ColorACC Socket 4DSP Indicators 1DOT Matrix Indicators3FUNCTION Indicators Function displayMicrophone Connector ➊UP/DOWN Switches UP/DN ➋LOCK Switch Lock➌PTT Switch PTT HM-103 Schematic DiagramUnpacking Installation and ConnectionsPL-259 Connector Installation Example GroundingStand InstallationSingle body mounting Front panel separationRequired connections Rtty TerminalAdvanced connections Connecting a NON-ICOM DC Power Supply Power supply connectionsConnecting the PS-125 / PS-85 DC Power Supply Connecting a NON-ICOMConnecting the IC-PW1 Connecting the AH-4Connecting the AT-180 External antenna tuners and linear ampliﬁerInitial settings Frequency SettingWhen ﬁrst applying power CPU resetting Power onVFO description VFO ModeMemory Mode pgs ExampleHz and 10 Hz tuning steps Frequency settingProgrammable tuning steps Band selectionSSB/CW/RTTY modes Any mode FM/WFM/AM modes MHz quick tuning stepTS Switch Flow Chart Sub dial functionQuick band change function Mode selectionOperating Mode Selection ➁ Push F-1-F-3 to select a band stacking registerIf shift function Receive and TransmitFunctions for receive RIT functionPreamp and attenuator Noise blankerAGC time constant Peak meter holdRF gain and squelch Simple band scopeRF/SQL control priority Filter ON/OFF Filter PresettingOptional ﬁlter selection 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 AH-4 operation ➂ The Tuner light lights constantly when tuning is completeOptional AH-4AUTOMATIC Antenna Tuner operation PTT tune function➀ Select VFO a and set the frequency to 7.057 MHz/CW Split frequency operationQuick split function Split lock functionRepeater operation ➄ Push and hold PTT to transmit release PTT to receive➆ To return to simplex operation, push F-1SPL ➅ Communicate in the usual manner Tone squelch operationTone scan operation ➂ Push F-3SCN to toggle tone scan operation on and OFFThis function automatically activates the repeater set One-touch repeater functionAuto repeater function Frequency Duplex DirectionCW operation Functions for CWConnections for CW Elec KEYSetting the electronic keyer CW reverse modeDElectronic CW keyer Quick SET Mode CW pitch controlFunctions for Rtty Connections for Rtty FSKConnections for Afsk Presetting for Rtty Rtty FSK operationRtty Afsk operation Connections for packet Adjusting the transmit signal output from the TNCPacket operation Data socketMeasuring SWR Spot measurementPlot measurement Memory channel selection Memory and Scan OperationMemory channels Memory clearingProgramming in VFO mode Programming in memory modeMemory/call programming Calling up memory names Frequency transferringMemory names Editing programming memory namesCalling up a frequency from a memo pad Memo padsWriting frequencies and operating modes into memo pads ➀ Select the S1 displayScan types PreparationSelect memory scan operation Programmed scan operationMemory scan operation Priority watchRemote Jack CI-V Information CI-V connection exampleData format Command Table VFO A=BInitial set mode operation SET ModeQuick set mode operation GeneralQ2 MIC Gain SSB/AM/FM only Quick set mode itemsQ3 VOX Delay 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 SPL Offset split offset Quick Split quick split functionSplit Lock split lock DUP HF duplex offsetAuto Rptr auto repeater AM NB Noise blanker in AM modePWR on CHK Power on check Scan Resume scan resumePTT Tune PTT tune function 29 9600 Mode Data socket speedTune Strt auto tuner start Vsend SEL ACC socket outputCI-V Baud CI-V data rate LVL Spch S-level speechCI-V Addres CI-V address CI-V TRN CI-V transceiveMemory backup MaintenanceFuse replacement 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-10EXTERNAL Speaker SP-12EXTERNAL Speaker PS-125DC Power SupplySP-7EXTERNAL Speaker SP-20EXTERNAL SpeakerSpecifications Menu Guide + power onPower OFF then on to exit initial set mode Indication Description No. IndicationFor 2 sec SSB/AM/FM mode CW mode Rtty modeMode Display Display MenuCount on us About CE Declaration ConformityForward clearance, Eirp by frequency band Installation NotesTypical amateur radio installation 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.