Galaxy dx929 User Manual

DX 929

PAGE

CHAPTER 1

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

TABLE OF CONTENTS

CHAPTER 2

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Installing The Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Ignition Noise Interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

External Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Public Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

CHAPTER 3

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Frequency Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Procedure to Receive and Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Two Way

Citizens Band Mobile Transceiver

With StarLite Face Plate

Alternate Microphone and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Maintenance And Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

A Few Rules That Should Be Obeyed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

How Your CB Can Serve You . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Use Channel 9 For Emergency Message Only . . . . . . . . . . . . . . . . . . . . . . 16

OWNERS MANUAL

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CHAPTER 1 SPECIFICATIONS

GENERAL

Model DX 929
Channels 40
Frequency Range 26.965 ~ 27.405 MHz
Emission AM
Frequency Control Phase-Lock-Loop (PLL) Synthesizer
Frequency Stability 0.001%
Temperature Range
Antenna Impedance 50 Ohms
Antenna Connectors Standard SO-239 type
Input Voltage 13.8V DC
Size 7 1/4” (W) x 9” (D) x 2 1/4” (H)
Weight 3.4 lbs.

TRANSMITTER

RF Power Output AM: 4 watts
Spurious Emission > -60 dB
Unwanted Sideband -50 dB
Audio Distortion < 5%
Frequency Response 300 to 2500 Hz
Microphone Dynamic

RECEIVER

Sensitivity for 10 dB (S+N)/N < 0.5 uV
Squelch Sensitivity < 0.5 uV
Selectivity > -50 dB
Image Rejection > 60 dB
Hum & Noise > -40 dB

AGC Figure of Merit
Audio Power Output 2.5W @ 10% Distortion

Audio Response 300 to 2500 Hz

(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)

-30°C to +50°C

50 mV for 10 dB Change in Audio Output

CHAPTER 2 INSTALLATION

INSTALLING THE RADIO

Choose a convenient location for operation that does not interfere with driver or
passenger. This radio is supplied with a universal mounting bracket. When mounting
the bracket and radio to your car, make sure it is mechanically strong. Also, provide a
good electrical grounding connection to the chassis of vehicle. Proceed as follows to
install the radio.

1. Locate a convenient area in your vehicle for the installation of the radio. Hold the

mounting bracket with 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 radio antennas come equipped with a PL-259 plug. Connect this plug to the

ANT. Jack in the rear of the radio.

3. Extending from the rear of the radio is a fused red and black wire for the DC

connections to the vehicle’s electrical system. For best performance, it is strongly
recommended that the red lead be taken directly to the positive terminal on the
vehicle’s battery and the black lead be connected to the nearest chassis ground.
(Note: This radio is designed for vehicles with negative ground systems.)

Connections should be made using appropriate “crimp on” lugs of a size large
enough to make good contact with the bolt used to fasten to the battery and the
chassis ground. It is a good safety idea to install a second fuse that would provide
protection in case the red wire was to “fray” or get pinched and short to the body
of the vehicle, somewhere between the battery and the radio.

Poor power connections cause supply voltage drops that can substantially
decrease the performance of your radio. A good DC connection is probably one of
the most important things for getting the best transmitter performance and in some
cases, least receiver noise.

4. Mount the microphone bracket near the radio in an easily accessible spot using the

two screws provided.

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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, quarter­wave length antenna. If antenna height is a problem, you may use a shorter, loaded­type 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.

CHAPTER 3 OPERATION

CONTROL FUNCTIONS
FRONT PANEL

8 109 11 1312

9

+20

7

5

S

3

1

20

MOD

1

0

PWR

SWR

1

1.5

DX

+40

+60

60

80

40

100%

6

12

3

18

MAX

3

2

929

RF GAIN

dB

1 32

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. MIC GAIN CONTROL: 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.

5. POWER CONTROL: This control allows the user to adjust RF power output.

DIMMER

VOL SQ MIC GAIN

OFF

TALKBACK

NB/ANLSWR

CB

OFF

PAPWR

4 65 7

HI

LO

POWER

1514 16

RX/TX

SWR

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6. 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.

7. CHANNEL SELECTOR: This control is used to select the desired transmit and

receive channel.

8. FRONT PANEL METER: The front panel meter allows the user to monitor

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

9. 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.

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

amplifier under strong signal conditions.

11. DIMMER CONTROL: This knob controls the level of brightness for the

faceplate lettering, meter lamp and channel display.

12. 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. They are most accurate when testing at
maximum power output. When this switch is in “PWR” position, the meter
indicates your power output.

13. NB-ANL/CB/PA SWITCH: When the switch is in the NB/ANL position, the

Noise Blanker (NB) and Automatic Noise Limiter (ANL) circuits are activated.
The Noise Blanker is very effective in eliminating repetitive impulse noise such
as ignition interference. In the CB position, the PA function is disabled and the
radio will transmit and receive on the speaker that is connected. In the PA position,
the radio acts as public address amplifier. Your voice will come out of the speaker
that is plugged into the PA. SP. jack on the rear panel. The radio does not operate
when you are in the PA mode.

14. TALKBACK SWITCH: This feature is used to monitor your own voice. For

example, you could use this feature to compare different microphones. HI is high
volume. LO is low volume. The Talkback circuit is off when the switch is in the
OFF position.

15. RX/TX LED: This LED is green during receive and red during transmit.

16. CHANNEL DISPLAY: The channel display indicates the current selected

channel.

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