Software Adjustment DC Power Supply, PLL Adjustment

Standard signal generator

0.1∝V to 32 mV (–127 dBm to –17 dBm)

to the antenna connector

to [MIC]

Audio generator

CAUTION:

DO NOT transmit while SSG is connected to the antenna connector.

Personal computer

to an RS-232C port

deviation meter

Attenuator

40 dB or 50 dB

RF power meter 0.1–10 W/50 Ω

Frequency

counter

OPC-478

DB9 female plug

(incl. level converter circuit)

Speaker (8 Ω )

to [SP]

SINAD meter

JIG cable

• DC POWER CABLE CONNECTIONS

SOFTWARE ADJUSTMENT

DC POWER

SUPPLY

Soldering

DC cable here

–

Top view

5 - 3

Image 14

Contents

VHF FM Transceivers Repair Notes IntroductionOrdering Parts Table of Contents ‘ Transmitter Section Specifications‘ General ‘ Receiver Bottom View Inside ViewsMain Unit TOP View Removing the Chassis Panel Disassembly and Option InstructionsDisassembly Instruction Removing the Main Unit Optional Unit Installations Sponge Circuit Description Receiver Circuits Transmitter Circuits VCC Power Supply Circuits Voltage LinePLL Circuit OPT Port Allocations Output Expander IC IC10 Adjustment Procedures Preparation Clone SPEGND Software Adjustment DC Power Supply PLL Adjustment Main PLL AdjustmentPLL Lock Voltage Software Adjustment Level SensitivitySquelch SQL Parts List Main Unit Variable Ceramic JB 1C Chassis Parts Mechanical Parts and DisassemblyAccessories EP1 EP2 MP1 MP2 IC-F3GS parts Diodes SEMI-CONDUCTOR InformationTransistor and FET’S Board Layouts Main Unit IC5 FI2IC8 Cirq BlLOCK Diagram Voltage Diagram IC3C IC1 DTA144EU Section Voltage Diagram Avref Vtref Toned Tonem Avcc 16, Kamihigashi, Hirano-ku, Osaka 547-0002, Japan 16, Kamihigashi, Hirano-ku, Osaka, 547-0002, Japan