Test Equipment Setup, S.G. @ 1kHz Audio | Midland Radio SP-300

MAXON

SP-300 HAND HELD

TEST EQUIPMENT SETUP

WATT METER 20dB

AUDIO

MODULATION- METER

RADIO	AUDIO GENERATOR

OSCILLOSCOPE

DC POWER SUPPLY

SPECTRUM ANALYZER

154.625445681125661

FREQUENCY COUNTER

VOLT METER

SSG

3K Dev @ 1K (25 kHz Channel Spacing)

1.5K Dev @ 1K (12.5 kHz Channel Spacing)

OSCILLOSCOPE

RADIO

DISTORTION METER

DC POWER SUPPLY

SINAD METER

1. S.S.G. : @ 1kHz Audio:

Page -23-

May 2001

Image 26

Midland Radio SP-300 service manual Test Equipment Setup, S.G. @ 1kHz Audio

Contents

Service Manual Table of Contents Board Layout Exploded View General SpecificationsTemperature Range Current Consumption Adjacent Channel Power DimensionsWeight Frequency Bands Receiver Peak Deviation @ 1 kHz Nom. Dev +20dB RX Tone Demodulation Characteristics Features SP-300INTRODUCTION Busy Channel Lockout VCO Lock Time Description of Controls Description Theory of Operation Digital Circuits RF Circuits RF Circuits PLL Synthesizer Noise Detector Squelch mute CircuitKHz Band Pass Filter Speaker Audio Amplifier Removing the belt clip Maintenance and RepairRemoving & Replacing the Belt Clip To replace the belt clip To replace the battery Removing & Replacing the BatteryTo remove the battery To remove the PTT assembly Removing & Replacing the ACCES- Sory Connector Removing & Replacing the Antenna & Control Knobs To replace the Back Cover Removing & Replacing the Back CoverTo remove the Back Cover Removing & Replacing the Main Board To remove the Main Board To replace the Main Board Removing & Replacing the Speaker Component ReplacementRemoving & Replacing the DAUGH- TER Boards Surface Mount Component Replacement Surface Mounted Integrated Circuit Replacement Cloning Alignment ProcedureProgramming RX VCO Test Equipment Setup S.G. @ 1kHz Audio Alignment Points Diagram TP1 Troubleshooting Guide Symptoms Causes Counter Measures Voltage Charts Main Circuit Receive State Transmit State SP-300 Series UHF & VHF Digital Section Parts List REF# Description PART# -30- May SP-300 Series VHF RF Section Parts List REF # Description Replacement Modules -32- May -33- May SP-300 Series UHF RF Section Parts List -35- May -36- May -37- May Component Pinout KTA1504SY -39- May Base Diagram PIN Description VHF FRONT-END VHF Power AMPUHF Power AMP UHF FRONT-END VHF V.C.O UHF V.C.O Fuse ACC-200 BatteryTcxo SP-300 Series VHF RF Schematic UHF RF Schematic -47- May Board Layout Top Main Board Assembly 416121B -49- May