Intek M-490 PLUS User Manual

OWNER'S MANUAL

MANUALE DI ISTRUZIONI

MULTI STANDARD PROGRAMMABLE

27 MHz CB MOBILE TRANSCEIVER

M-490 PLUS

Man. M-490 PLUS 7-06-2005 16:57 Pagina 1

Declaration of Conformity

With the present declaration, we certify that the following products :

INTEK M-490 PLUS

comply with all the technical regulations applicable to the above mentioned products
in accordance with the EC Directives 73/23/EEC, 89/336/EEC and 99/5/EC.

Type of product : CB Transceiver

Details of applied standards : EN 300 433, EN 300 135-2

EN 301 489-1, EN 301 489-13

EN 60065

Manufacturer : INTEK S.R.L.

Via G. Marconi, 16
20090 Segrate, Italy
Tel. [phone] / Fax. [phone]
E-mail : [e-mail]

Notified Body : EMCCert Dr. Rasek

Boelwiese 5, 91320 Ebermannstadt
Germany
Identification Number : 0678

Contact Reference : Armando Zanni

Tel. [phone] / Fax. [phone]
E-mail : [e-mail]

Segrate, 30/05/2005 dr. Vittorio Zanetti

(General Manager)

DECLARATION OF CONFORMITY

EC Certificate of Conformity

(to EC Directive 99/5-89/336-93/68-73/23)

Man. M-490 PLUS 7-06-2005 16:57 Pagina 2

Index

- 1 -

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Content of the packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Controls and operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 11

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-13

Frequency bands table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Frequency band selection / programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Table of restrictions on the use of CB transceivers . . . . . . . . . . . . . . . . . . 14-15

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

PCB - Controls Board / ESP Compander Diagram . . . . . . . . . . . . . . . . . . . . . . 33

PCB - Main Board & CPU Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34-35

Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-37

Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38-39

Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40-41

0678

NOTICE !

It is recommended to carefully read this owner’s manual before using the product. This
will also help the user to prevent using the radio in violation of the regulations valid in the
country where the product is used, as well as to avoid any possible interferences with
other services.

NOTICE !

Before using this transceiver, please check that the radio has been programmed on the
frequency bands, specifications and operating modes allowed by the regulations valid in
the country where the product is used. If not, please proceed to modify the frequency
band programming, as it is described in this owner’s manual. This transceiver is factory
pre-programmed on the CE European frequency band (CEPT 40CH FM 4W).

CH

English

Man. M-490 PLUS 7-06-2005 16:57 Pagina 3

Introduction - Content of the packaging

- 2 -

Congratulations!

Congratulations for selecting and purchasing an INTEK quality product. This transceiver
includes a number of advanced functions and systems, therefore it is definitely necessary
to carefully read this owner’s manual before using the radio. With a correct use of the
product in accordance with the operating method described in this manual, the product will
offer a trouble free use for many years. INTEK is constantly engaged to develop and
provide quality products meeting the customers requirements, however any suggestion or
comments on this product that might help us to improve quality are warmly welcome.

INTEK M-490 PLUS is a CB transceiver using advanced hardware and software design,
it includes a special multi-standard programmable circuit, which allows to program the
specifications of the radio (frequency bands, operating modes, transmitter power) in
compliance with the regulations valid in the various European countries. Therefore this
product can be used in any country of the European Community. The radio is delivered
factory pre-programmed on the CE European frequency band (CEPT 40CH FM 4W).

Content of the packaging

Please check that all the following items are contained in the packaging :

main unit (transceiver)
DC power cord with fuse holder and fuse
dynamic microphone
car mounting bracket
car mounting bracket accessories (hardware, knobs, etc.)
microphone bracket
owner’s manual

English

Man. M-490 PLUS 7-06-2005 16:57 Pagina 4

Controls and operation

- 3 -

Front panel

1. ANL-OFF Selector

This selector allows to enable the ANL function (Automatic Noise Limited). The ANL
allows reducing electric and electromagnetic noise on the operating channel. Move
the selector to ANL to enable the function and move it to OFF to disable it.

2. LOC-DX Selector

This selector allows to enable the LOC function (Local), in order to attenuate the
strength of the incoming signals. This attenuator is useful in case of very strong
signals incoming from local stations that, due to the high signal level, might cause
distortion and poor quality of the received signals. Move the selector to the DX (Long
Distance) when receiving weak signals or from long distance. Move the selector to
LOC (Local) when receiving strong signals from local stations.

3. LCD Display

The LCD display has a large size (visible area mm 54 x 21) and an orange colour
backlighting system, for best readability. The LCD display shows all the enabled
functions as well as several other information programmable by the user, such as the
channel readout or the full 5-digit frequency readout. It also includes a digital 10-bar
S/RF Meter to monitor the strength/power of the received and transmitted signals.

English

AM/FM SCAN LCR

Q.UP Q.DN TRUCK

DW

F

M1

TX/RX

ESP

ANL LOC

EMG

ESP

CHANNELMIC GAINRF GAINPA/ SQ LOFF/VOL

M-490 PLUS

OFF DX

M2 M3 M4

1 2 3 54 6 7 8 9

13

11

161718192021 15 14

12

10

Man. M-490 PLUS 7-06-2005 16:57 Pagina 5

Controls and operation

LCD Display

A. AM Icon

The AM icon is lighted when radio receives and transmits in AM mode (amplitude
modulation).

B. FM Icon

The FM icon is lighted when radio receives and transmits in FM mode (frequency
modulation).

C. SCAN Icon

The SCAN icon is lighted when the SCAN function (automatic search of busy
channels) is enabled.

D. TRUCK Icon

The TRUCK icon is lighted when the special programmable TRUCK memory channel
(for truck drivers) has been selected.

E. EMG Icon

The EMG icon is lighted when one of the special pre-programmed emergency
channels has been selected.

F. ESP Icon

The ESP icon is lighted when the ESP (Electronic Speech Processor) function has
been enabled. The ESP is an RX & TX electronic modulation processor.

R

P

Q

A

B C

G

H

L

I

F

NO M

D E

- 4 -

English

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Controls and operation

- 5 -

G. RX Icon

The RX icon is lighted when radio is in receive mode.

H. TX Icon

The TX icon is lighted when radio is in transmit mode.

I. DW Icon

The DW icon is lighted when the DUAL WATCH function (automatic monitoring of two
channels) is enabled.

L. S/RF Digital Meter

A digital 10-bar S/RF METER indicates the strength of the received signal (from S0 to
S9+30) in the receive mode and the transmitter RF output power (0 to 4W) in the
transmit mode.

M. Alphanumeric Digit

This alphanumeric digit indicates the fifth and last figure (in KHz) of the operating
frequency, when the full frequency readout function is enabled.

N. LOW Icon

The LOW icon is lighted when the transmitter is in the LOW POWER (1W) mode.

O. LOCK Icon

The LOCK icon is lighted when the LOCK function has been enabled.

P. M1-M4 Icons

The M1-M4 icon is lighted when one of the four memory channels has been selected.

Q. Alphanumeric Digit

These four numeric or alphanumeric digits indicate :

- the first four figures of the operating frequency (in KHz), when the full frequency
readout function has been enabled

- the country code, in accordance with the programmed frequency band (i.e. DE,
UK, CE, etc.)

- the operating channel number (01 to 80, according to the programmed frequency
band), when the channel number readout function is enabled

R. F Icon

The F icon is lighted when the F (Function) mode has been enabled, which allows the
use of the dual function keys (keys 6,7,8,9).

English

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Controls and operation

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English

4. ESP Indicator

This LED indicator lights up in red colour when the ESP (Electronic Speech Processor)
function is enabled. The ESP is an RX & TX electronic modulation processor.

5. TX/RX Indicator

This green-red dual colour LED indicator lights up in green colour when radio is in
receive mode and in red colour when radio is in transmit mode.

6. AM/FM and M1 Key

This key allows to select the AM or FM operating mode in both RX and TX. The
AM/FM operating mode selection is possible only if it is allowed the programmed
frequency band, otherwise the selection is not possible. This key is also used to
program and select the memory channel M1 (refer to item .11). If the UK (United
Kingdom) frequency band has been programmed, by shortly pressing this key you
can select the UK channels (UK frequencies) or the CE channels (CE frequencies).

7. SCAN and M2 Key

By pressing the SCAN key, the SCAN (automatic scanning of busy channels) function is
enabled. To enable the SCAN function, first turn the SQUELCH control (19) clockwise,
until the background noise is cut. Then press the SCAN key, radio will automatically start
scanning all channels continuously and the SCAN icon (C) will appear on the LCD. Auto­scan stops if a signal is detected on a channel, in order to let the user listen to the
incoming signal and will start again when no signal is detected on that channel. If the
PTT Key (27) is pressed within 5 seconds, radio will remain on that channel, otherwise
scanning will start again. Auto-scan may be also re-started at any time by pressing again
the SCAN key. To exit the SCAN mode, shortly press the PTT button (27). This key is
also used to program and select the memory channel M2 (refer to item .11).

8. LCR and M3 Key

By pressing the LCR (Last Channel Recall) key, radio will automatically select the last
used channel. This key is also used to program and select the memory channel M3
(refer to item .11).

9. DW and M4 Key

The DW (Dual Watch) function allows automatic alternate monitoring of two
programmable channels. Select the first channel to be monitored using the channel
selector knob (13) or the channel selection keys on the microphone (28, 30). To
enable the DW function, press the DW key for about 2 seconds, until the DW icon (I)
appears and blinks on the LCD display. Now select the second channel to monitor
using the channel selector knob (13) or the channel selection keys on the microphone
(28, 30). Press again the DW key for about 2 seconds. The DW function is now
enabled and the LCD display will alternately show the channel number of the two
programmed channels. The DW icon (I) will be lighted on the LCD display. Monitoring
stops if a signal is detected on one of the two channels, in order to let the user listen

Man. M-490 PLUS 7-06-2005 16:57 Pagina 8

Controls and operation

- 7 -

English

to the incoming signal and will start again when no signal is detected on that channel.
It is possible to transmit on that channel, by simply pressing the PTT key (27). If there
is no transmission within 5 seconds, monitoring will re-start. To exit the DW mode,
shortly press the PTT button (27). This key is also used to program and select the
memory channel M4 (refer to item .11).

10. TRUCK Key

The TRUCK key is an exclusive function of some INTEK mobile CB radios. This key
allows programming and quick access to a special memory channel, specifically
devoted to truck drivers communications. To program the TRUCK memory channel,
select the desired channel using the channel selector knob (13) or the channel
selection keys on the microphone (28, 30). Then press and hold the TRUCK key until
the TRUCK icon (D) appears on the LCD display. The TRUCK channel is now stored
in the special TRUCK memory and it can be immediately re-called by simply pressing
the TRUCK key.

11. F (Function) Key

The F (Function) key is used to enable various functions.

CHANNEL NUMBER READOUT OR FULL 5-DIGIT FREQUENCY READOUT
Press and hold the F key for about 2 seconds to read the programmed frequency
band (first 2 digits) and the operating channel number (next 2 digits) i.e. DE.40. Press
and hold again the F key for about 2 seconds to change the reading and read the full
5-digit operating frequency (in KHz), i.e. 27.405.

MEMORY CHANNELS (M1-M4) PROGRAMMING
Select the channel to be programmed and stored in one of the four available
memories (M1-M4), using the channel selector knob (13) or the channel selection
keys on the microphone (28, 30). Shortly press the F key and the F icon (C) will blink
on the LCD display. Now press and hold one of the memory keys M1, M2, M3 or M4
for about 2 seconds, until the memory channel number will appear on the LCD
display (i.e. M1). All the specifications associated to each channel will be stored in
memory (i.e. AM/FM mode, EU/UK mode, transmitter power, etc.).

MEMORY CHANNELS (M1-M4) SELECTION
Shortly press the F key and the F icon (R) will blink on the LCD display. Now press
one of the dual function keys (M1 to M4) to quickly recall and access to one of the
programmed memory channels. The selected memory channel number will appear
on the LCD display (P).

FREQUENCY BAND / COUNTRY CODE / OPERATING MODE PROGRAMMING
Please refer to the related section at page. 14.

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Controls and operation

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English

Modulation without ESP Modulation with ESP

100%

0%

100%

ESP performance
of the modulation

in RX and TX modes

12. Q.DN (Quick Down) Key

This key allows fast selection of the operating channel downward. Each time this key
is pressed, the channel number moves down by 10 channels.

13. CHANNEL Selector

This knob selects the channel number, by one channel steps. The knob may be
turned clockwise to select channels upward or counter clockwise to select channels
downward.

14. EMG (Emergency Channels) Key

This key allows quick access to one of the two pre-programmed emergency channels
(CH9 or CH19). Each time this key is pressed, radio will select CH9, then CH19, then
again the normal operating channel. When one of the emergency channels is selected,
the EMG icon (E) will appear on the LCD display. The operating mode (AM or FM) for
the emergency channels is factory pre-programmed as per the following table.

15. ESP (Electronic Speech Processor) Key

The ESP (Electronic Speech Processor) is an exclusive advanced feature in some of
the new INTEK mobile CB radios. ESP means Electronic Speech Processor, in other
words electronic modulation processor. This microprocessor controlled audio device
is also called COMPANDER (Compressor-Expander), it works as a modulation
compressor in transmission and as a modulation expander is receive mode. The ESP
allows to obtain a stronger, cleaner and clearer audio signal and it is a great help in
noisy areas, in case of long distance communication or with weak signals. The
efficiency of ESP is even greater when communicating with other radios having the
same system. To enable or disable the ESP function, press the ESP key. When the
ESP function is enabled, the ESP icon (F) appears on the LCD display.

COUNTRY

CODE

CH-9

CH-19

I0

AM

AM

I2

AM

AM

DE

AM

AM

D2

AM

AM

EU

AM

AM

CE

FM

FM

SP

AM

AM

FR

AM

AM

UK

AM

AM

PL

AM

AM

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Controls and operation

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English

16. MIC GAIN Control

This transceiver uses a high quality dynamic microphone. The microphone gain is
adjustable with the MIC GAIN control. By turning the knob clockwise, the microphone
gain is increased.

17. Q.UP (Quick UP) Key

This key allows fast selection of the operating channel upward. Each time this key is
pressed, the channel number moves up by 10 channels.

18. RF GAIN Control

This transceiver uses a high sensitivity and selectivity receiver circuit. The receiver
gain is adjustable with the RF GAIN control. By turning the knob clockwise, the
receiver gain is increased. It is convenient to reduce the receiver gain in case of very
strong signals from local stations and to increase it in case of weak signals or long
distance communications.

19. PA/SQL Control

SQUELCH CONTROL
The SQUELCH control allows to silent the receiver by cutting the background noise.
Turn the SQUELCH knob clockwise until the background noise is cut. Turn the
SQUELCH knob counter clockwise (SQUELCH opening) to listen to the weakest
signals.

PA CONTROL
The radio includes the PA (Public Address) function, in order to spread audio
messages through an external speaker. To use the PA function, connect an external
speaker (optional) to the PA jack (24) located on the rear side of the radio. Turn the
PA/SQL knob completely counter clockwise to the PA position. The PA icon (Q)
appears on the LCD display. Now it is possible to press the PTT key (27) and speak
into the microphone to spread your message through the external speaker. Adjust the
microphone gain with the MIC GAIN knob (16) to the desired level.

20. OFF/VOL (OFF / Volume) Control

This knob switches the radio ON and OFF and it adjusts the volume control. If no
signals are being received on the operating channel, it is suggested to open the
SQUELCH and adjust the volume to the desired level while listening to the
background noise.

21. MICROPHONE Connector

Connect the supplied dynamic microphone to this connector, locking it through the
ring nut.

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Controls and operation

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English

Rear Panel

22. ANTENNA Connector

Antenna connector. Refer to the section INSTALLATION OF THE ANTENNA.

23. S-METER Jack

This jack is for connecting an external S-METER (optional).

24. PA Jack

If the PA function has to be used, connect to the external speaker (optional) to this
jack. Refer to item no. 19.

25. EXT (External Speaker) Jack

This jack is for connecting an external speaker (optional).

26. 13.2VDC POWER CORD

13.2VDC power cord input.

ANTENNA

EXTPAS-METER

POWER

13.2V DC

22 23 24 25

26

IMPORTANT !

Do never attempt to open the cabinet of the transceiver. No user serviceable parts inside.
Internal modifications or tampering may cause damage to the product, modify its
technical specifications and will void warranty rights. If service or repair are required,
please go to an authorised service centre or specialized technician.

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Controls and operation

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English

Microphone

27. PTT (Push-to-Talk) Key

Connect the supplied dynamic microphone to this connector, locking it by tightening
the ring nut.

28. UP (Channel Selector) Key

Each time this key is pressed, the channel number will move upward by one channel.

29. LOCK (Keypad Lock) Key

The LOCK function is enabled when pressing this key, in order lock the keypad and
prevent entering unwanted commands. When the LOCK function is enabled, the
LOCK icon (O) appears on the LCD display.

30. DOWN (Channel Selector) Key

Each time this key is pressed, the channel number will move downward by one
channel.

31. MICROPHONE Plug

6-pole microphone plug with locking ring nut, to be connected to the microphone
connector (21) located on the front side of the radio.

292827

31

30

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Installation

- 12 -

English

Installation

Before installing the main unit in the vehicle, check and select the most convenient location, in
order that the radio will be easy to reach and comfortable to operate, without disturbing or
interfering with the vehicle drive. Use the supplied bracket and hardware to install the radio. The
bracket screws must be well tightened in order not to become loosen with the vehicle
vibrations. The car mounting bracket can be installed over or below the radio and the radio may
be inclined as desired according to the specific type of installation (under dashboard or track
cabin roof installation).

Installation of the Main Unit

Before connecting the radio to the vehicle electric system, make sure that radio is switched off,
with the OFF/VOL (20) knob completely turned counter clockwise at OFF position. The DC
power cable (26) of the radio is complete with a fuse holder with fuse located on the red positive
(+) wire. Connect the DC power cable to the vehicle electric system, with special attention to
respect correct polarity, even if the radio is protected against polarity inversion. Connect the red
wire to the positive (+) pole and the black wire to the negative (-) pole of the vehicle electric
system. Make sure that the wires and terminals are firmly and stably connected, in order to
prevent cables from disconnecting or causing short circuits.

Installation of the Antenna

A specific mobile antenna adjusted for 27 MHz frequency range must be used. The antenna
installation must be done by a specialised technician or service centre. Please pay special
attention to carefully install the antenna on the vehicle with perfect connection to ground. Before
connecting the antenna to the radio, it is necessary to check the correct operation of the
antenna with low standing wave ratio (S.W.R.), using adequate instruments. If not, the
transmitter circuit of the radio could be damaged. The antenna must be usually installed on the
highest part of the vehicle, free from obstacles and as far away as possible from any source of
electric or electromagnetic noise. The RF antenna coaxial cable must not be damaged or
pressed on its way between antenna and the radio. The correct operation of the antenna and
the low standing wave ratio (S.W.R.) must be checked periodically. Connect the RF antenna
coaxial cable to the antenna connector (22), located on the rear side of the radio.

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