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Kenwood NX-320 Series User Manual

Kenwood NX-320 Series
110 pages
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SERVICE MANUAL
This product uses Lead Free solder.
This product complies with the
RoHS
directive for the European market.
© 2011-3 PRINTED IN JA PAN
B51-8963-00
(
N
)
455
NX-320
UHF DIGITAL TRANSCEIVER
Does not come with antenna.
Antenna is available as an option.
Knob (Volume)
(K29-9485-03)
Knob (Selector)
(K29-9486-03)
Knob (PTT)
(K29-9500-03)
Button knob
(Side1/Side2/AUX)
(K29-9501-03)
Plastic cabinet assy
(A02-4132-03)
Packing (4Key)
(G53-1864-01)
Packing (16Key)
(G53-1865-01)
Plastic cabinet assy
(A02-4131-03)
Plastic cabinet assy
(A02-4130-03)
Helical antenna
(KRA-23: Option)
Knob (Volume)
(K29-9485-03)
Knob (Selector)
(K29-9486-03)
Knob (PTT)
(K29-9500-03)
Button knob
(Side1/Side2/AUX)
(K29-9501-03)
Helical antenna
(KRA-23: Option)
Knob (Volume)
(K29-9485-03)
Knob (Selector)
(K29-9486-03)
Knob (PTT)
(K29-9500-03)
Button knob
(Side1/Side2/AUX)
(K29-9501-03)
Helical antenna
(KRA-23: Option)
NX-320 K,K4,E3 NX-320 K2,K5,E2 NX-320 K3,K6,E

Table of Contents

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Kenwood NX-320 Series Specifications

General IconGeneral
Operating Temperature-30°C to +60°C
Frequency Range136-174 MHz, 400-470 MHz
Power Output5 W (VHF), 4 W (UHF)
Water ResistanceIP55
Channel Spacing6.25 kHz, 12.5 kHz, 25 kHz
Digital ProtocolNXDN
IP RatingIP55

Summary

GENERAL

Personal Safety Precautions

Recommended precautions for user safety during operation and servicing.

SYSTEM SET-UP

REALIGNMENT PROCEDURES

Panel Test and Tuning Modes

Procedures for using Panel Test and Tuning Modes for adjustments.

PC Mode Setup and Interfaces

Details on PC Mode, programming interfaces, and software requirements.

DISASSEMBLY AND REASSEMBLY

CIRCUIT DESCRIPTION

IF, Audio, Squelch, and Transmitter Systems

Explanation of IF, audio amplifier, squelch, and transmitter systems.

Transmitter Amplifiers and PLL Synthesizer

Explains amplifiers, PLL, and the ASIC/Memory circuit functions.

LCD, Keys, Battery, DSP, Power Supply, Signaling

Describes LCD, key detection, battery, DSP, power supply, and signaling circuits.

COMPONENTS DESCRIPTION

PARTS LIST

TROUBLE SHOOTING

ADJUSTMENT (K TYPE)

Alignment Equipment and Radio Checks

Lists required equipment and outlines radio check procedures.

Transmitter Power, Balance, and Deviation Adjustments

Procedures for adjusting transmitter power, balance, and deviations.

Receiver Sensitivity, RSSI, Squelch, and Level Adjustments

Procedures for adjusting receiver sensitivity, RSSI, squelch, and signal levels.

ADJUSTMENT (E TYPE)

Panel Tuning Mode, Frequency, Signaling

Covers Panel Tuning Mode, frequency, and signaling adjustments for E/E2 models.

Adjustment Item Descriptions and Ranges

Tables detailing adjustment items, ranges, and flowcharts for E type calibration.

Alignment Equipment, Radio Checks, Transmitter Adjustments

Covers equipment, radio checks, and transmitter adjustments like Receive/Transmit Assist and Frequency.

Receiver Adjustments

Procedures for receiver adjustments including AF level, sensitivity, RSSI, squelch, and low signal levels.

TERMINAL FUNCTION

INTERCONNECTION DIAGRAM

SCHEMATIC DIAGRAM

SPECIFICATIONS (K TYPE)

SPECIFICATIONS (E TYPE)

Receiver and Transmitter Performance Specifications

Covers receiver sensitivity, selectivity, distortion, and transmitter power, noise, and modulation specs.

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