background image

3

ENTERING THE ADJUSTMENT MODE

¡

¡ 

Turn the transceiver’s power OFF.

™ 

While connecting the “TEST” on the MAIN board to “GND”, and then turn power ON.

OPERATION ON THE ADJUSTMENT MODE

• Change the adjustment item

: HM-75A’s [B] key

• Change the adjustment value

: HM-75A’s [UP]/[DN] keys

• Verify the adjustment value

: HM-75A’s [A] key

• Change the adjustment channel

: IC-4088A’s [UP]/[DN] keys

• Change the adjustment group

: IC-4088A’s [MODE]+ [UP]/[DN] keys

ADJUSTMENT ITEMS

When entering adjustment mode, displayed adjustment items indicator on the LCD as follow.

• Reference frequecy adjustment

: Displayed 

• Output power adjustment

: Displayed  

• FM deviation adjustment

: Displayed 

• CTCSS adjustment

: Displayed 

• Squelch adjustment

: Displayed 

EQUIPMENT

DC power supply

RF power meter
(terminated type)

Frequency counter

IC-4088A ADJUSTMENT PROCEDURES

1 PREPARATION

• When adjusting IC-4088A, HM-75A

OPTIONAL SPEAKER-MICROPHONE

is required.

• 

All adjustment items must be preformed at “ADJUSTMENT MODE” as show below.

REQUIRED TEST EQUIPMENT

GRADE AND RANGE

Output voltage

: 6 V DC

Current capacity

: 1 A or more

Measuring range

: 1 mW–1 W

Frequency range

: 300–600 MHz

Impedance

: 50 

SWR

: Less than 1.2 : 1

Frequency range

: 0.1–600 MHz

Frequency accuracy : ±1 ppm or better
Sensitivity

: 100 mV or better

EQUIPMENT

FM deviation meter

Standard signal 
generator (SSG)

GRADE AND RANGE

Frequency range

: 30–600 MHz

Measuring range

: 0 to ±10 kH

Frequency range

: 0.1–600 MHz

Output level

: 0.1 µV–32 mV

(–127 to –17 dBm)

CHANNEL NO.

1 ch.

2 ch.

3 ch.

4 ch.

5 ch.

6 ch.

7 ch.

8 ch.

9 ch.

10 ch.

11 ch.

12 ch.

13 ch.

14 ch.

FREQUENCY

462.5625 MHz

462.5875 MHz

462.6125 MHz

462.6375 MHz

462.6625 MHz

462.6875 MHz

462.7125 MHz

467.5625 MHz

467.5875 MHz

467.6125 MHz

467.6375 MHz

467.6625 MHz

467.6875 MHz

467.7125 MHz

• DISPLAYED CHANNEL’S FREQUENCY LIST

Отзывы: