Connex Cx-33hp-atc User manual

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CXw33HPwATC

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AM/ FM Two Way

Amateur Mobile Transceiver

OWNER'S MANUAL

Printed in Malaysia

A4 1 2308DHB

Downloaded from www.cbradio.nl

CHAPTER:! SPECIFICATIONS

CHAPTER 1

PAGE

Specifications

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CHAPTER

Installation

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Installing The Radio

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Ignition Noise Interference

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Antenna

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External Speaker

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Public Address

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CHAPTER

Operation

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Front Panel

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Rear Panel

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Procedure to Receive and Transmit

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Alternate Microphone and Installation

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GENERAL

Model

Frequency Range

Emission

Frequency Control

Frequency Stability

Temperature Range

Antenna Impedance

Antenna Connectors

Input Voltage

Size:

Weight:

CX-33HP-ATC

28.015 28.585 MHz

AM/FM

Phase-Lock-Loop (PLL) Synthesizer

0.001%

-30°C to +50°C

50 Ohms

Standard SO-239 type

13.8V DC

7 7/8" (W) x 10 3/4" (D) x 2 3/8" (H)

5.0 lbs.

TRANSMITTER

RF Power Output:

10W

Spurious Emission

Audio Distortion

Frequency Response

Microphone

> -50 dB

10%

300 to 2500 Hz

Dynamic

Audio Power Output

Audio Response

RECEIVER

Sensitivity for 10 dB (S+N)IN

Sensitivity for 20 dB (5+14)/N

Squelch Sensitivity

Selectivity

Image Rejection

Hum & Noise

AGC Figure of Merit

AM: < 1 uV

FM: < 1 uV

<0.5uV

> -60 dB

>50dB

> -40 dB

70 dB for 50 mV for 10 dB Change in Audio

Output

2.5W @ 10% Distortion

300 to 2500 Hz

(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)

INSTALLING THE RADIO

Choose a convenient location for operation that does not interfere with driver or

passenger. This radio is supplied with a universal mounting bracket. When mounting the

bracket and radio to your car, make sure it is mechanically strong. Also, provide a good

electrical grounding connection to the chassis of vehicle. Proceed as follows to install the

radio.

Locate a convenient area in your vehicle for the installation of the radio. Hold the

mounting bracket with the radio in the location where the radio is to be installed.

Make sure nothing will interfere with either the radio or the mounting bolts. Mark and

then drill holes for the mounting bracket.

Most radio antennas come equipped with a PL-259 plug. Connect this plug to the

ANT. Jack in the rear of the radio.

Extending from the rear of the radio is a fused red and black wire for the DC

connections to the vehicle's electrical system. For best performance, it is strongly

recommended that the red lead be taken directly to the positive terminal on the

vehicle's battery and the black lead be connected to the nearest chassis ground. (Note:

This radio is designed for vehicles with negative ground systems.)

Connections should be made using appropriate "crimp on" lugs of a size large enough

to make good contact with the bolt used to fasten to the battery and the chassis ground.

It is a good safety idea to install a second fuse that would provide protection in case

the red wire was to "fray" or get pinched and short to the body of the vehicle,

somewhere between the battery and the radio.

High power radios such as this one require large DC current flow when in the TX

mode. Poor power connections cause supply voltage drops that can substantially

decrease the performance of your radio. A good DC connection is probably one of the

most important things for getting the best transmitter performance and in some cases,

least receiver noise.

Mount the microphone bracket near the radio in an easily accessible spot using the two

screws provided.

IGNITION NOISE INTERFERENCE

With weak signals, you may experience interference of the signal by background noise.

This radio has NB and ANL circuits which will help reduce background noise from

sources such as your ignition system. However, background electrical noise may come

from several sources and all noise may not be eliminated. With extremely weak signals,

you can operate this radio with the engine turned off, which should improve reception. If

the ignition noise level is too high to allow proper operation under most conditions, you

should have your installation of the radio checked by a qualified technician.

ANTENNA

This radio has a jack in the rear for a standard PL-259 antenna plug. If you are looking

for the most range for your transmission, use a vertically polarized, quarter-wave length

antenna. If antenna height is a problem, you may use a shorter, loaded-type whip antenna

although you can expect some loss of transmission range.

To improve performance, your antenna should be matched to your radio. Your antenna

can be adjusted so that it matches your radio.

EXTERNAL SPEAKER

The external speaker jack (EXT SP.) on the rear panel is used for remote receiver

monitoring. The external speaker should have 8 ohms impedance and be able to handle at

least 4 watts. When the external speaker is plugged in, the internal speaker is disconnected.

PUBLIC ADDRESS

To use the Public Address (PA) function, first connect an external speaker to the PA. SP.

Jack on the rear of the radio. See the above specifications for a proper external speaker.

Keep the speaker away from the microphone to avoid acoustic feedback.

CONTROL FUNCTIONS

FRONT PANEL

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MICROPHONE

JACK: Used to connect microphone for voice source.

ON/OFF VOLUME CONTROL:

This knob controls the volume and power to the

radio. To turn radio on, rotate the knob clockwise. Turning the knob further will

increase the volume of the receiver.

SQUELCH CONTROL:

This knob is used to eliminate background noise being

heard through the receiver, which can be disturbing when no transmissions are being

heard through the receiver. To use this feature, turn the knob fully counterclockwise

and then turn clockwise slowly until the background noise is just eliminated. Further

clockwise rotation will increase the threshold level which a signal must overcome in

order to be heard. Only strong signals will be heard at a maximum clockwise setting.

MIC GAIN CONTROL:

Adjusts the microphone gain in the transmit and PA modes.

This controls the gain to the extent that full talk power is available several inches

away from the microphone. In the Public Address (PA) mode, the control functions as

the volume control.

RF GAIN CONTROL:

This control is used to reduce the gain of the RF amplifier

under strong signal conditions.

MODE SWITCH:

This control allows you to select one of the following operating

modes: AM/FM.

BAND SELECTOR:

This switch is used to select the band.

E-TONE CONTROL:

This control is used to adjust echo effect and intervals of echo.

CHANNEL SELECTOR:

This control is used to select the desired transmit and

receive channel.

10.

FRONT PANEL METER:

The front panel meter allows the user to monitor signal

strength and RF output power.

11.

NB-ANLIRB-NB-ANL/OFF SWITCH:

In the NB-ANL and RB-NB-ANL position

the RF Noise Blanker and the automatic Noise Limiter in the audio circuit are also

activated. The Noise Blanker is very effective in eliminating repetitive impulse noise

such as ignition interference. When the switch is position RB-NB-ANL position to the

middle position, only the Automatic Noise Limiter (ANL) is engaged. Move the

switch to the bottom position to turn off the ANL and NB.

12.

RF POWER HI/LO SWITCH:

This switch allows the user to select High or Low RF

power output.

13.

ATC SWITCH:

With the switch in A you can add echo to your voice. With the

switch in B position you can adjust the tone and pitch of your voice. In the C position

your voice will sound as robot.

14.

TALKBACKIOFF/+10KHz SWITCH:

When this switch is in the TALKBACK

position, it is used to monitor your own voice in the radio speaker. For example, you

could use this feature to compare difference Microphones. When in the +10KHz

position, the transmit and receive frequency is shifted 10KHz. Both Talkback and

+I OKHz are off when this switch is in the OFF position.

15.

RX/TX LED:

The red LED indicates the unit is in the transmit mode. The green LED

indicates the unit is in the receive mode.

16.

ADC (AUTO DIMMER CONTROL) LED:

This function with light sensor control.

The channel display, meter and led light will changing with environment condition.

17.

CHANNEL DISPLAY:

The channel display indicates the current selected channel.

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PROCEDURE TO RECEIVE

Be sure that power source, microphone and antenna are connected to the proper

connectors before going to the next step.

REAR PANEL

ANT

MADE IN MALAY. IA

ANTENNA: This jack accepts a

ohm coaxial cable with a PL-259 type plug.

DC POWER:

This jack accepts the 13.8V DC power cable with built-in fuse. The

power cord provided with the radio has a black and red wire. The black goes to

negative and red goes to positive.

* F.C.: This connector is used for an external frequency counter which indicates the

frequency of the selected channel.

PA SP:

This jack is for PA operation. Before operating, you must first connect a PA

speaker (8 ohms, 4W) to this jack.

EXT. SP:

This jack accepts a 4 to 8 ohm,

watt external speaker. When the external

speaker is connected to this jack, the built-in speaker will be disabled.

(Remark: * Additional function is depend on Model.)

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PROCEDURE TO RECEIVE AND TRANSMIT

A. MICROPHONE

The push-to-talk switch on the microphone controls the receiver and transmitter. Press

the switch and the transmitter is activated, release switch to receive. When transmitting,

hold the microphone two inches from your mouth and speak clearly in a normal voice.

This transceiver comes complete with a low impedance dynamic microphone.

Turn VOL knob clockwise to apply power to the radio.

Set the VOL for a comfortable listening level.

Set the MODE switch to the desired mode.

Listen to the background noise from the speaker. Turn the SQ knob slowly clockwise

until the noise just disappears. The SQ is now properly adjusted. The receiver will

remain quiet until a signal is actually received. Do not advance the control too far or

some of the weaker signals will not be heard.

Set the

CHANNEL

selector switch to the desired channel.

Set the

RF GAIN

control fully clockwise for maximum R.F gain.

PROCEDURE TO TRANSMIT

Select the desired channel of operation.

Set the

MIC GAIN

control fully clockwise.

If the channel is clear, depress the push-to-talk switch on the microphone and speak in

a normal voice.

00 0

Pin Number

Mic Cable Lead

Audio Shield

Audio Lead

Transmit Control

Receive Control

Fig. 1

Your transceiver microphone schematic.

KNURLED RING

PIN RECEPTACLE

RETAINING SCREW

HOUSING

CABLE CLAMP

RETAINER SCREW(2)

A. MICROPHONE CONNECTOR ASSEMBLY

WASHER

B. MICROPHONE CONNECTOR DISASSEMBLED FOR WIRING

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ALTERNATE MICROPHONES AND INSTALLATION

For best results, the user should select a low-impedance dynamic type microphone or a

transistorized microphone. Transistorized type microphones have low output impedance

characteristics. The microphones must be provided with a four-lead cable. The audio

conductor and its shielded lead comprise two of the leads. The third lead is for transmit

control and fourth is for receiving control.

The microphone should provide the functions shown in the schematic below.

4 WIRE MIC CABLE

If the microphone to be used is provided with pre-cut leads, they must be revised as

follows.

Cut leads so that they extend 7/16" beyond the plastic insulating jacket of the

microphone cable.

All leads should be cut to the same length. Strip the ends of each wire 1/8" and tin the

exposed wire.

Before beginning the actual wiring, read carefully the circuit and wiring information

provided with the microphone you select. Use the minimum heat required in soldering the

connections. Keep the exposed wire lengths to a minimum to avoid shorting when the

microphone plug is reassembled.

Fig. 2 Microphone plug wiring

To wire the microphone cable to the plug provided, proceed as follows:

Remove the retaining screw.

Unscrew the housing from the pin receptacle body.

Loosen the two cable clamp retainer screws.

Feed the microphone cable through the housing, knurled ring and washer as shown

Figure

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The wires must now be soldered to the pins as indicated in the above wiring tables. If

a vise or clamping tool is available it should be used to hold the pin receptacle body

during the soldering operation, so that both hands are free to perform the soldering. If

a vise or clamping tool is not available, the pin receptacle body can be held in a

stationary position by inserting it into the microphone jack on the front panel. The

numbers of the microphone plug are shown in Fig. 3, as viewed from the back of the

plug. Before soldering the wire to the pins, pre-tin the wire receptacle of each pin of

the plug.

Fig.

3 Microphone plug pin numbers viewed from rear of pin receptacle.

Be sure that the housing and the knurled ring of Figure 2 are pushed back onto the

microphone cable before starting to solder. If the washer is not captive to the pin

receptacle body, make sure that it is placed on the threaded portion of the pin

receptacle body before soldering.

If the microphone jack is used to hold the pin receptacle during soldering operation,

best results are obtained when the connections to pin 1 and 3 are made first and then

the connections to pins 2 and 4. Use a minimum amount of soldering and be careful to

prevent excessive solder accumulation on pins, which could cause a short between the

pin and the microphone plug housing.

When all soldering connections to the pins of the microphone are completed, push the

knurled ring and the housing forward and screw the housing onto the threaded portion

of the pin receptacle body. Note the location of the screw clearance hole in the plug

housing with respect to the threaded hole in the pin receptacle body. When the

housing is completely threaded into the pin receptacle body, a final fraction of a turn

either clockwise or counterclockwise may be required to align the screw hole with the

threaded hole in the pin receptacle body. When these are aligned, the retaining screw

is then screwed into place to secure the housing to the pin receptacle body.

The two cable clamp retainer screws should now be tightened to secure the housing to

the microphone cord. If the cutting directions have been carefully followed, the cable

clamp should secure to the insulation jacket of the microphone cable.

10.

Upon completion of the microphone plug wiring, connect and secure the microphone

plug in the transceiver.

MEMO

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MEMO

Connex CX-33HP-ATC User manual