Pozosta FDK-Multi-700AX User Manual

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FDK

INSTRUCTION MANUAL

MULTI-700AX

2m FM 1-25W
PLL TRANSCEIVER

Fukuyama

ELECTRONICS CO., LTd.

GENERAL INFORMATION

The Fukuyama Electronics Co., Ltd. (FDK) Model MULTI-700AX mobile and
base station 2 meter transceiver is reliable and "MULTI" functionable amateur
radio equipment. It is designed and assembled with selected components to
give even characteristics and is all solid-state. In normal use, and with proper
care it will gíve long and trouble-free service.

Communication range depends upon the usual factors such as antenna in use,
operating location, RF output power level and band conditions. Read manual
carefully before taking the equipment into use.

TABLE CONTENTS

GENERAL INFORMATION........................................................................... 1

OUTSTANDING FEATURES ................. ………………………………………… 3

SPECIFICATIONS...................... ……........................................................... 4

CONTROLS AND LAYOUD........................................................................... 5

TOP VIEW WITH COVER REMOVED…………………………………………….. 6
BOTTOM VIEW WITH COVER REMOVED…………………………………….. 7

NAME OF FUNCTION ................................................................................. 8

GENERAL OPERATION........................................................... .. 10

REMOVAL OF TOP/BOTTOM COVERS AND FRONT/CHASSIS PANEL 10
OFFSET FREQUENCY PROGRAM…………………………………………….. 11

TONE BURST / SQUELCH INSTALLATION ………………………........ 12

BLOCK DIAGRAM ............................................................................. 18

SCHEMATIC DIAGRAM .............. ………………………………………… 21

OUTSTANDING FEATURES

• Desirable Synthesizer Selection Plus Free One Memory Function:
Full an 800 channel from 144.000MHz to 147.995MHz each 5KHz step with

thece rotary and one push switches free selection frequency. Also desired
one channel free memorable frequency from entire the range.

• Dependable R.F Output Power Module:
Selectable an R.F Power output from 1 watt to upto 25 watts variable Power

control type, employed high efficient hy-brid Power module with dependable
performance and stability.

• Much Improved Cross-modulation and Blocking:
Employed dual stage an R.F helical-resonator section with dual-gate

MOSFET in R.F top circuit.

• Desirable Offset Function:
The transmit frequency provided at +/-600KHz shift frequency before

shipping factory and set an above frequency also available. Programmable
offset frequency appropriated for your local repeater facility.

• Built-in Automatic Protection:
In the event of accidental high VSWR open or short circuit antenna output,

there is automatic power¬ module protection.

• Employed Power Supply Noise Filter:
The supply line from battery to the equipment is a common source of high

noise level as a conductor of ignition and alternator interference. This is
eliminated by an effective line filter associated with the Power unit.

SPECIFICATIONS

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GENERAL;

Frequency range: 144.000 - 147.995MHz plus 143.950MHz
Channel capacity: 800 channels plus 143.950MHz, 1 channel
Mode: F3 (16F3)
Antenna impedance: 50 - 52 ohm (unbalanced)
Supply voltage: 11 - 15 volts D.C (13.8V nominal) Negative GND.
Consumption power: 6.0 amps at 25W transmit,

1.8 amps at 1W transmit,

1.7 amps at Audio max. receive, 1.0 amp at squelched
receive.

º

Temperature range: -10
Frequency tolerance: Within +/-0.002% ref, at 25
Dimensions: 162mm W x 70.5mm H x 260mm D.
Weight: Approx. 2.3 Kg

TRANSMITTER;

RF output power: 1 - 25 watts (continuous)
Modulation: Variable reactance frequency
Frequency deviation: +/-5KHz max. (factory preset)
Spurious and Harmonics: Less than 65 dB

Offset frequency: +/-600KHz and programmable frequency upto 1.6MHz

Optional tone function: Burst: 1,750 Hz +/ -1Hz, ap pro x. 1 seco nd du rati on

Microphone sensitivity: -43 dBm dynamic, 600 ohm with PTT function switch

RECEIVER;

Receiving method: Double superheterodyne
Sensitivity: Less than 0.4mV at 20 dB N.Q.
Squelch sensitivity: -5 dBu (threashold)
Intermediate frequency: 1st 16.9MHz

Spurious & image rejection: Less than 60 dB
Selectivity: More than +/-6KHz at -6 dB Less than +/-

Audio output power: Max. 1.8 watts at 10% THD.
Audio impedance: an 8 ohms

C to +60ºC degrees

º

C.

Squelch: Standard EIA frequency continuous

2nd 455 KHz

12KHz at 70 dB

Simplex/of

h

CONTROL AND LAYOUT

FRONT VIEW

Frequency

Offset
selector

REAR VIEW

MIC

switc

Ext. speaker jgck

TOP VIEW WITH COVER REMOVED

g

Display
output leads

Channel

switching

Programmable

offset diode

ulator I.C

5V re
Transmitter local.
crystal

Deviation

adjustment

Balanced
mixer F.E.T

Transmitter
bandpass
coil

VCO local input

Power module
unit

Memory storage
capacitor
Memory I.C
Output code
harness

Transmitter
unit MIC input
connector

Transmitter output
harness
Driver TR,
2SC-741

Module APC pots

Transmitter power
unit

BOTTOM VIEW WITH COVER REMOVED

Receiver output
harness

Audio power

egulator I.C S-

meter adjust pot
Squelch adjust
pot

455KHz ceramic
filter

Receiver
local crystal

16.9MHz crystal
filter

Helical

R.F. top
fet D.C
output