Galaxy DX 949, Service Manual

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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. Pushing this knob turns the Roger Beep on and 
off. When the Roger Beep is on, the radio transmits an audio tone at the end of your transmission. 
This indicates the end of your transmission so that people who are having trouble hearing you will 
know that you are done speaking. As a courtesy to others, use the Roger Beep only when necessary.     
 

4. RF  GAIN CONTROL 

This  control  is used to reduce the gain of the receive amplifier under strong signal conditions. 
 

5. DIMMER CONTROL 

This knob controls the level of brightness for the meter lamp and the LED channel display. Also, 
pushing this knob turns the meter lamp and the display LED’s on and off. 
 

6. RF POWER CONTROL 

This control allows the user to adjust RF power output. 
 

7. CHANNEL SELECTOR 

This control is used to select a desired transmit and receive channel.

 
8. FRONT PANEL METER 

The Front Panel Meter allows the user to monitor signal strength, RF output power, SWR level and 
AM modulation level.  

 
9. TALKBACK CONTROL 

Pushing this knob turns the Talkback circuit on and off. 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. 

 
10. CLARIFIER  

Allows tuning of the receive frequency above or below the channel frequency by up to 1.0 KHz. 
Although this control is intended primarily to tune in SSB signals, it may be used to optimize AM 
signals .   

 
11. 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. This operates in AM 
only, not in SSB. When this switch is in PWR position, the meter indicates your power output. 
 

12. NB/ANL/OFF SWITCH 

In the ANL position, the Automatic Noise Limiter is activated. When the switch is placed in the 
NB/ANL position, the RF Noise Blanker is also activated. The Noise Blanker is very effective in 
eliminating repetitive impulse noise such as ignition interference.  
 

 
 
 
13. PA/GNF/CB SWITCH