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5.  RF GAIN CONTROL:

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

under strong signal conditions. 

 

6. ECHO 

CONTROL:

 This control is used to adjust echo effect. 

 

7. TIME 

CONTROL:

 This control is used to adjust intervals of echo. 

 

8. CHANNEL 

SELECTOR:

 This control is used to select the desired transmit and 

receive channel. 

 

9. SWR 

LED:

 This LED lights red when your SWR is higher than about 3:1. This is 

not an exact indicator of 3:1 SWR, but it is an indication that you should check 
your SWR reading. 

 

10. FRONT PANEL METER:

 The front panel meter allows the user to monitor 

signal strength, RF output power, SWR level and AM modulation level. 

 

11. ILLUMINATED FACE PLATE: 

All faceplate lettering will fully illuminate to 

allow the user easy viewing at night. This unique, solid state, backlight is designed 
to maximize night vision while minimizing eye fatigue. Therefore, it is ideal for 
switch and control recognition day or night. 

 

12. TALKBACK (TB) CONTROL:

 Turn clockwise to activate Talkback circuit. 

Adjust this knob for desired volume of Talkback. This is used to monitor your own 
voice. For example, you could use this feature to compare different microphones. 

 

13. RF POWER CONTROL: 

This control allows the user to adjust RF power output.  

 

14. BAND SELECTOR:

 This switch is used to select the band. 

 

15. SWR/MOD/PWR  SWITCH: 

This switch controls the function of the meter 

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 automatically. When the switch is in the 
“MOD” position, the green scale on the meter indicates your percentage of 
modulation in the AM mode only. It is most accurate when testing at maximum 
power output.  When this switch is in “PWR” position, the meter indicates your 
power output. 

 

16. MODE SWITCH: 

This control allows you to select one of the following operating 

modes: AM/FM/PA. 

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17. +10KHz-NB/ANL/ NB/ANL/ OFF SWITCH:

 When in the upper position, 

transmit and receive frequency is shifted up 10KHz and the Noise Blanker (NB) 
and Automatic Noise Limiter (ANL) circuits are activated too. When the switch is 
in the middle position, the Noise Blanker (NB) and Automatic Noise Limiter (ANL) 
circuits are activated, but the +10KHz circuit is not activated. When in the lower 
position none of these circuits are active. The Noise Blanker is very effective in 
eliminating repetitive impulse noise such as ignition interference. 

 

18. BRIGHT/MED/DIM SWITCH: 

This switch controls the level of brightness for 

the meter lamp, faceplate and channel display. 

 

19. ECHO/OFF SWITCH:

 This switch is used to turn on the Echo circuit. 

 

20. +10KHz LED:

 This LED lights green when the +10KHz function is on. 

 
21. CHANNEL DISPLAY:

 The channel display indicates the current selected channel. 

 

22. 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.  

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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