Galaxy DX 979 Kullanıcı El Kitabı - Sayfa 3

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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.

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CHAPTER 3 OPERATION

CONTROL FUNCTIONS

FRONT PANEL

TALKBACK

MOD

OFF

PWR

SWR

DX 979

1. MICROPHONE JACK: Used to connect microphone for voice source.

2. 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.

3. 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.

4. RF GAIN CONTROL: This control is used to reduce the gain of the RF (receive)

amplifier under strong signal conditions.

CLARIFIER

SWR

NB/ANL

USB

RX/TX

MOD

PWR

LSB

SWR

VOL

MIC

DIM

PWR

OFF

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