Galaxy dx94hp User Manual

DX 94HP

PAGE

CHAPTER 1

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CHAPTER 2

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

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

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

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

TABLE OF CONTENTS

CHAPTER 3

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10 Meter

Amateur Mobile Transceiver

With Built-in Frequency Counter &

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

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

Procedure to Receive and Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Receiving SSB Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Alternate Microphone and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . 12

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StarLite Face Plate

OWNER’S MANUAL

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CHAPTER 1 SPECIFICATIONS

GENERAL

Model DX 94HP

Frequency Range 28.315 ~ 28.755 MHz

Emission AM/USB/LSB

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

Weight

TRANSMITTER

Transmit Current AM: 14 Amps SSB: 25 Amps

Spurious Emission -50 dB

Unwanted Sideband -50 dB

Audio Distortion 10%

Frequency Response 300 to 2500Hz

Microphone Dynamic

Clarifier Range

RECEIVER

Sensitivity for 10 dB (S+N)/N AM: < 0.5 μV; USB/LSB: < 0.25 μV

Squelch Sensitivity < 0.5 uV

Selectivity -55 dB

Image Rejection -50 dB

AGC Figure of Merit 100 mV for 10dB Change in Audio Output

Audio Power Output 2.5W @ 10% Distortion

Audio Response 300 to 2500 Hz

(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)

-30°C to +50°C

7 3/4" (W) x 2 7/8" (H) x 10 1/4" (D)

6 lb.

AM: 5W~40W RF Power Output

USB/LSB: 100W PEP

Coarse: ± 6.0KHz, Fine: ± 1.0KHz

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 red lead be connected directly to the positive terminal on the
vehicle’s battery and the black lead be connected directly to the negative terminal
on the battery. (Note, not connecting both leads direct to the battery may cause
performance problems) 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 30 amp 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.

High power radios such as this one require large DC current flow when in the TX
mode. 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 that 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, 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.

CHAPTER 3 OPERATION

CONTROL FUNCTIONS
FRONT PANEL

1. MICROPHONE JACK: Used to connect microphone.

2. MODE SWITCH: This control allows you to select one of the following operating

modes: AM/USB/LSB.

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. 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 that a signal
must overcome in order to be heard. Only strong signals will be heard at a
maximum clockwise setting.

5. MIC GAIN CONTROL: Adjusts the microphone gain in transmit and PA modes.

This controls the gain to the extent that full talk power is available several inches

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away from the microphone. In the Public Address (PA) mode, the control functions
as the volume control.

6. RF GAIN CONTROL: Adjust this knob for desired level of incoming signal.

7. DIM CONTROL: This knob controls the level of brightness for the meter lamp,

faceplate, frequency display and channel display. Turn clockwise to activate
backlight circuit.

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

9. ECHO CONTROL: This control is used to adjust echo effect.

10. TIME CONTROL: This control is used to adjust intervals of echo.

11. FINE/COARSE CONTROL: Allows variation of the radio operating frequencies

above and below the channel frequency. Although this control is intended primarily
to tune in SSB signals, it may be used to optimize AM signals.

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

receive channel.

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

incoming signal strength, RF output power and SWR level.

14. 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
both day or night.

15. BAND SELECTOR: This switch is used to select the band.

16. PWR/SWR/RB SWITCH: When in the RB position, the radio transmits an audio

tone at the end of your transmission to indicates that transmission has ended. As a
courtesy to others, use the Roger Beep only when necessary. When the switch is 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 (accurate at maximum power output). When this switch is in
“PWR” position, the meter indicates your power output.

17. TALKBACK CONTROL: This feature is used to monitor your own voice. For

example, you could use this feature to compare different microphones. This knob
controls the volume of the Talkback level. The Talkback circuit is off when the
MIC GAIN knob is depressed.

18. OFF/ NB/ANL /FD.OFF SWITCH: In the NB/ANL position, the RF Noise

Blanker and the automatic Noise Limiter in the audio circuits are also activated.
The Noise Blanker is very effective in eliminating repetitive impulse noise such as
ignition interference. When the switch is in the F.D.OFF position, the frequency
Display is OFF.

19. OFF/ECHO/VC SWITCH: With the switch in VC position you can adjust the

tone and pitch of your voice. With the switch in ECHO you can add echo and
reverb to your voice. In the OFF position your voice will sound natural.

20. FREQUENCY COUNTER: This display indicates the frequency of the selected

channel.

21. OFF/+10K/PA SWITCH: When the switch is in the +10KHz position, the

frequency is shifted up 10KHz. 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.

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

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