STEP

SETTING

CONNECTION

ADJUST

1 ADJUST FOR

1

Frequency adjustment;
Mode: Receive
Volume: Optional
Squelch : Optional
CH Selector: 1

Frequency counter to output pin_1 of IC5(LC72338)

CT901

4.5MHz ±100Hz

2

CPU Voltage check;
Mode: Receive
Volume: Optional
Squelch: Optional
CH Selector: Optional

Connect DC volt meter to TP1 on CPU board.

Indication on DC voltmeter must be 4.8-5.2volt.

STEP

SETTING

CONNECTION

ADJUST

ADJUST FOR

1

RF Driver stage;
Mode: Transmit
Volume: Optional
Squelch : Optional
CH Selector:19

Connect oscilloscope probe to base of Q602

T601 T602

Adjust for maximum wave form on the oscilloscope.

2

RF Power stage;
Mode: Transmit
Volume: Optional
Squelch: Optional
CH Selector:19

Connect dummy load and RF power meter to the external ANT-jack on the set.

T604 VR1

Adjust for max. indication on the power meter(4W).

3

Second harmonic check:
Mode: Transmit
Volume: Optional
Squelch: Optional
CH Selector:19

Connect RF power meter with dummy load to spectrum analyzer through coupler/-40dB atten. to EXT-ANT. jack on the set

At no modulation. compare the level of fundamental freq.-spectrum to the level of harmonic freq-spectrum. Suppression of the 2nd harmonic Freq. level must be lower than 60Db. Check for the other: channel's

4

Frequency check;
Mode: Transmit
Volume: Optional
Squelch: Optional
CH Selector:19

Connect dummy load and frequency counter through coupler to RF power meter. Also connect power meter to EXT-ANT. jack on the set.

CT901

Make sure that the indication or the transmitter freq. Is 27.185MHz ±300Hz on the frequency counter.

5

MAX deviation check;
Mode: Transmit
Volume: Optional
Squelch: Optional
CH Selector:19

Connect dummy load and modulation meter through coupler to RF power meter. Also connect power meter to EXT-ANT. jack on the set.

VR401

adjust VR401 so that the indication of the modulation analyzer is 90% with 5% tolerance at high power mode.