Galaxy DX 959 Service Manual page 5

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, the frequency display and the
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
In the PA position, your voice will come out of the speaker that you need to plug in to the PA. SP.
jack on the rear panel. The radio does not operate when you are in the PA mode. The CB mode is
normal operation of the radio. In the GNF mode, you are in CB operation but the Galaxy Noise
Filter is engaged. This is a special noise filter that de-emphasizes audio high frequency response in
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