Tx Amplifier Adjustments - Icom IC-7300 Service Manual

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Table Of Contents

Table of Contents

4-4 TX POWER ADJUSTMENTS (continued)

ADJUSTMENT ITEM

TX POWER &

18 • Display: "TX Total 70M Gain"

POWER METER SETTING

(70 MHz band)

19 • Display: "POWER 70M 1%"

20 • Display: "POWER 70M 10%"

21 • Display: "POWER 70M TUNE"

22 • Display: "POWER 70M 50%"

23 • Display: "POWER 70M 100%"

AM CARRIER POWER

24 • Display: "POWER AM Ratio 70M"

(70 MHz band)

Only for [#03, 05 and 06]

• Push [EXIT] to return to the main adjustment menu.

4-5 TX AMPLIFIER ADJUSTMENTS

• Touch [TX/ID] on the main adjustment menu screen.

NOTE: The transceiver automatically transmits when a TX adjustment item is selected.

ADJUSTMENT ITEM

PREPARATION

1 • Display: "TX POWER SET"

ALC METER

2 • Display: "ALC HF"

3 • Display: "ALC 50M"

Only for [#03, 05 and 06]

4 • Display: "ALC 70M"

DRIVE AMP GAIN

5 • Display: "DRIVE HF"

6 • Display: "DRIVE 50M"

7 • Display: "DRIVE 70M"

SWR METER

8 • Display: "SWR2 (HF)"

9 • Display: "SWR2 (50M)"

Only for [#03, 05 and 06]

10 • Display: "SWR2 (70M)"

Id APC

11 • Display: "ID-APC"

• Push [EXIT] to return to the main adjustment menu.

TRANSCEIVER'S CONDITION

• Transmit (automatic)

TRANSCEIVER'S CONDITION

• Receive

• Transmit (automatic)

OPERATION

–

1) Touch [SET].

(Automatically starts to transmit.)

2) Adjust the TX power by rotating

[MAIN DIAL], and then touch [SET].

OPERATION

1) Connect the AG with the millivoltmeter

to [MIC], and then set it as;

Frequency : 1.5 kHz

Level

: 30 mVrms

2) Connect the power meter to the

antenna connector.

3) Touch [ALC] on the TX adjustment

menu, to enter to the TX amplifier

adjustment mode.

–

• Connect the 50 Ω dummy load to the

antenna connector.

–

4-5

ADJUST

VALUE

POINT

25 W

(A beep sounds, and

then another beeps

sound 0.5 sec. later.)

2 W

(A beep sounds, and

then another beeps

sound 0.5 sec. later.)

7.5 W

(A beep sounds, and

then another beeps

sound 0.5 sec. later.)

10 W

(A beep sounds, and

[MAIN DIAL]

then another beeps

sound 0.5 sec. later.)

27.5 W

(A beep sounds, and

then another beeps

sound 0.5 sec. later.)

52.5 W

(A beep sounds, and

then another beeps

sound 0.5 sec. later.)

12.5 W

(A beep sounds, and

then another beeps

sound 0.5 sec. later.)

VALUE

–

Touch [SET].