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

■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

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