background image

 

 

- 8 - 

 

REAR PANEL 

 

1. ANTENNA:

 This jack accepts a 50-ohm coaxial cable with a PL-259 type plug. 

 
2. 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.  

 

3. PA 

SP:

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

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

 
4. EXT. SP:

 This jack accepts a 4 to 8 ohm, 5-watt external speaker. When the 

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

 

POWER

ANT.

PA.SP.

+

EXT.SP.

_

2

1

3

4

 

 

- 9 -  

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.  
 

B.  PROCEDURE TO RECEIVE 

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

connectors before going to the next step. 

 
2. Turn 

VOL

 knob clockwise to apply power to the radio.  

 
3. Set 

the 

VOL

 for a comfortable listening level. 

 
4. Set 

the 

MODE

 switch to the desired mode.   

 
5.  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. 

 
6. Set 

the 

CHANNEL

 selector switch to the desired channel. 

 
7. Set 

the 

RF GAIN

 control fully clockwise for maximum RF gain. 

 

C.  PROCEDURE TO TRANSMIT 

1.  Select the desired channel of operation. 
 
2. Set 

the 

MIC GAIN

 control fully clockwise. 

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

in a normal voice. 

Summary of Contents for DX 45MP

Page 1: ...2 40 9 20 dB M O D E D TB PW R B A TB O FF C F G H 10KHz AM BRI GHT SW R N B AN L N B AN L O FF FM PW R PA D I M M ED 1 TABLE OF CONTENTS PAGE CHAPTER 1 Specifications 2 CHAPTER 2 Installation 3 Inst...

Page 2: ...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 2 Most radi...

Page 3: ...ss 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 avoi...

Page 4: ...ter during the transmit mode In the SWR position the meter indicates the Standing Wave Ratio SWR of your antenna There are no adjustments because the SWR circuit in this radio calibrates itself automa...

Page 5: ...your mouth and speak clearly in a normal voice This transceiver comes complete with a low impedance dynamic microphone B PROCEDURE TO RECEIVE 1 Be sure that power source microphone and antenna are co...

Page 6: ...be used is provided with pre cut leads they must be revised as follows 1 Cut leads so that they extend 7 16 beyond the plastic insulating jacket of the microphone cable 2 All leads should be cut to t...

Page 7: ...he 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 caus...

Page 8: ...Please include a note with a detailed description of the symptoms This is important because it will help the technician who works on your radio to locate your problem Intermittent problems are easily...

Page 9: ...Printed in China AT0949010O...

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