Icom HF/VHF/UHF ALL MODE TRANSCEIVER manual Measuring SWR, Spot measurement, Plot measurement

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■SWR

The IC-706MKIIG has a built-in circuit for measuring antenna SWR while in SSB mode—no external equip- ment or special adjustments are necessary.

RECEIVE AND TRANSMIT 4

☞NOTE: The SWR of ANT1 only can be read since ANT2 has no measuring circuit.

DMeasuring SWR

The IC-706MKIIG can measure SWR in 2 ways:

(A) Spot measurement; or (B) Plot measurement.

(A) Spot measurement

➀Conﬁrm that the output power is over 30 W.

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

➂Push [(F3)MET] to select the SWR meter.

➃Push [MODE] one or more times to select CW or RTTY operation.

•Key down or push [PTT] to transmit; then read the actu- al SWR from the meter:

➠≤ 1.5 well matched antenna

➠> 1.5 check antenna or cable connection, etc.

CW

							BLANK
S1	3	5	7 9	20	40	60dB	VFO A
SWR	1	1.5 2	3		∞		CH
M3 FIL					NB		MET
SWR		1	1.5	2	3	5	∞ 10

The best match is in this range.

(B) Plot measurement

Plot measurement allows you to measure the SWR over an entire band.

G2 10k	STR
Frequency span
Step bar indication
Frequency indication mark
Measure start indicator

qConﬁrm that the output power is over 30 W. wPush [DISPLAY] twice to select G1.

ePush [MENU] to select G2.

rSet the center frequency for the SWR to be mea-

sured.

tPush and hold [(F1)10k] one or more times to select the desired frequency pitch.

yPush and hold [(F2)] one or more times to select the desired step.

uAfter selecting the desired pitch and step, push [(F3)STR] to measure the SWR.

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 entire frequency range.

!1When the measured SWR is less than 1.5, the antenna is well matched.

Span		Push [F-1] for 1 sec. to change the
		selected span.
Step bar		Push [F-2] for 1 sec. to change the step
		bar (3, 5, 7 or 9 steps are available.

Marker		Indicates the currently active step bar.

Start		Flashes while the SWR is being mea-
		sured.

Step y
			RTTY
					BLANK
S1 3 5	7 9	20	40	60dB	VFO A
PO	5			10	CH
G2 50k					STR
Step o
	USB
					BLANK
S1 3 5	7 9	20	40	60dB	VFO A
PO	5			10	CH
G2 50k					STR

4.0

3.5

3.0

2.5

2.0

1.�5

1.0

The antenna is well matched in this range

38

Image 41

Contents I706MKG Word Definition Rwarning PrecautionsTable of Contents 0MAIN Dial Tension Latch Panel DescriptionFront panel @2PREAMP/ATTENUATOR Switch P.AMP/ATT 2LOCK Switch LockFunction switches Speech Compressor p VOX Function pBREAK-IN p Function pRear and side panels ACC Socket When connecting the ACC conversion cable OPC-599ACC PIN # Name Description Specifications Color 3FUNCTION Indicators 1DOT Matrix Indicators4DSP Indicators Function display➌PTT Switch PTT ➊UP/DOWN Switches UP/DN ➋LOCK Switch LockMicrophone Connector HM-103 Schematic DiagramPL-259 Connector Installation Example Installation and ConnectionsUnpacking GroundingSingle body mounting InstallationStand Front panel separationRtty Terminal Required connectionsAdvanced connections Connecting the PS-85 DC Power Supply Power supply connectionsConnecting a NON-ICOM DC Power Supply Connecting a NON-ICOMConnecting the AT-180 Connecting the AH-4Connecting the IC-PW1 External antenna tuners and linear ampliﬁerWhen ﬁrst applying power CPU resetting Frequency SettingInitial settings Power OFFMemory Mode pgs VFO ModeVFO description VFOProgrammable tuning steps Frequency settingHz and 10 Hz tuning steps Band selectionTS Switch Flow Chart MHz quick tuning stepSSB/CW/RTTY modes Any mode FM/WFM/AM modes Sub dial functionOperating Mode Selection Mode selectionQuick band change function ➁ Push F-1-F-3 to select a band stacking registerFunctions for receive Receive and TransmitIf shift function RIT functionAGC time constant Noise blankerPreamp and attenuator Peak meter holdRF/SQL control priority RF gain and squelchSimple band scope Optional ﬁlter selection Filter PresettingFilter ON/OFF SSBNR Noise Reduction function Ceiver maintains the ON/OFF condition when pushing F-2NRANF Automatic Notch Filter function DMeter function Output power and mic gainFunctions for transmit VOX operation Speech compressorTuner Operation Manual TuningOptional AT-180 Automatic Antenna Tuner operation Optional AH-4AUTOMATIC Antenna Tuner operation ➂ The Tuner light lights constantly when tuning is completeAH-4 operation PTT tune functionQuick split function Split frequency operation➀ Select VFO a and set the frequency to 7.057 MHz/CW Split lock function➄ Push and hold PTT to transmit release PTT to receive Repeater operationTone scan operation Tone squelch operation➅ Communicate in the usual manner ➂ Push F-3SCN to toggle tone scan operation on and OFFAuto repeater function One-touch repeater functionThis function automatically activates the repeater set Frequency Duplex DirectionConnections for CW Functions for CWCW operation Elec KEYDElectronic CW keyer Quick SET Mode CW reverse modeSetting the electronic keyer CW pitch control Connections for Afsk Functions for Rtty Connections for Rtty FSK Rtty Afsk operation Presetting for RttyRtty FSK operation Packet operation Adjusting the transmit signal output from the TNCConnections for packet Data socketPlot measurement Measuring SWRSpot measurement Memory channels Memory and Scan OperationMemory channel selection Memory clearingMemory/call programming Programming in VFO modeProgramming in memory mode Memory names Frequency transferringCalling up memory names Editing programming memory namesWriting frequencies and operating modes into memo pads Memo padsCalling up a frequency from a memo pad ➀ Select the S1 displayPreparation Scan typesMemory scan operation Programmed scan operationSelect memory scan operation Priority watchData format Remote Jack CI-V InformationCI-V connection example VFO A=B Command TableQuick set mode operation SET ModeInitial set mode operation GeneralQ3 VOX Delay SSB/AM/FM only Quick set mode itemsQ2 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 Split Lock split lock Quick Split quick split functionSPL Offset split offset DUP HF duplex offsetPWR on CHK Power on check AM NB Noise blanker in AM modeAuto Rptr auto repeater Scan Resume scan resumeTune Strt auto tuner start 29 9600 Mode Data socket speedPTT Tune PTT tune function Vsend SEL ACC socket outputCI-V Addres CI-V address LVL Spch S-level speechCI-V Baud CI-V data rate CI-V TRN CI-V transceiveFuse replacement MaintenanceMemory backup CleaningPower Supply Receive Problem Possible Cause Solution TroubleshootingTransmit Display Scan Problem Possible Cause Solution Opening the transceiver case Optional INSTALLATIONS/SETTINGSIf ﬁlters DOperation InstallationPIN no Description Name AT-180 internal switch descriptionS2 S1 B a Bottom view Internal ViewsTop view Options SP-10EXTERNAL Speaker SP-12EXTERNAL Speaker SP-7EXTERNAL SpeakerSP-20EXTERNAL Speaker SP-21EXTERNAL SpeakerSpecifications Power OFF then on to exit initial set mode + power onMenu Guide Indication Description No. IndicationMode Display SSB/AM/FM mode CW mode Rtty modeFor 2 sec Menu DisplayCount on us