Galaxy DX-2547 User Manual
OWN
NU
POWER
TALKBACK
OFF
PHONES
MIC
RF POWER
MIC RF
Printed In Malaysia
AT2547010A
PD0009028
Citizen Band Base Station Transceiver
DX 2547
9
7
+20
S
5
3
1
20%
MOD
3
0
PWR
SWR
1
AM / SSB Base Station CB Radio
SWR
DIM TONE
OFF
dB
+40
+60
60%
80%
40%
100%
9
12
6
15
MAX
3
2
1.5
DX 2547
MOD
PWR
R. B.
PA
RX / TX
CHANNEL
SWR ALERT
AM/ SSB Two Way
ER’S MA
R.B.GNF USB
USB
PA AM
ANL
ANL
GNF
AM
LSB
LSB
NB
NB
CLARIFIER
CLARIFIER
AL
NORMAL
9 19
SQUELCH
VOLUME
TABLE OF CONTENTS
PAGE
CHAPTER 1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
CHAPTER 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Ignition Noise Interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
External Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Phone Jack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Public Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CHAPTER 3
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Control Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Frequency Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Procedure to Receive And Transmit . . . . . . . . . . . . . . . . . . . . . . . 12
Receiving SSB Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Alternate Microphone And Installation . . . . . . . . . . . . . . . . . . . . 15
Maintenance and Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
A Few Rules That Should Be Obeyed . . . . . . . . . . . . . . . . . . . . . 19
How Your CB can Serve You . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Use Channel 9 for Emergency Message Only . . . . . . . . . . . . . . . 20
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
GENERAL
Channels 40
Frequency Range 26.965 ~ 27.405 MHz
Emission AM/USB/LSB
Frequency Control Phase-Lock-loop (PLL) Synthesizer
Frequency Tolerance 0.005%
Frequency Stability 0.003%
Temperature Range
Antenna Impedance 50 Ohms
Antenna Connectors Standard SO-239 type
Meter Function Meter#1 RF output Power / Antenna SWR
Meter#2 Received signal strength / MOD %
Input Voltage AC 120V, 60Hz
TRANSMITTER
RF Power Output AM 4W ; USB/LSB 12W PEP
Antenna Connector UHF Type, 50 Ohms
AM Modulation Up to 100%
Spurious Emission Better than -60 dB
Unwanted Sideband Better than -60 dB
RECEIVER
Sensitivity for 10 dB (S+N)/N AM : 0.5 uV, USB/LSB : 0.15 uV
Adjacent Channel Rejection -60dB
Image Rejection -50dB
AGC Figure of Merit 50 mV for 10dB Change in Audio Output
Audio Power Output 2.5W @ 10% Distortion
Audio Response 300 to 2500 Hz
CHAPTER 1 SPECIFICATIONS
-30°C to +50°C
- 1 -
- 2 -
CHAPTER 2 INSTALLATION
LOCATION
Choose a location close to an AC power outlet and convenient for running
the antenna lead-in cable. This transceiver is attached with the AC power
cord set. Proceed as follows to complete all necessary connections to the
transceiver.
1. Your transceiver has a standard antenna connector type, SO-239 located
on the rear panel for easy connection to the standard PL-259 coax plugs.
If the coax antenna cable must be made longer, use only enough coax
cable to suit your needs with impedance of 50 ohms, frequency range
from 26.965 to 27.405 MHz. This will insure proper impedance match
and maximum power transfer from the transmitter to the antenna.
2. Use 120V AC power for the base station.
NOISE INTERFERENCE
There are several kinds of noise interference you may encounter in base
station operation. Some of these noises come from fluorescent light,
electrical appliance, lawnmower, nearby commercial broadcast etc.
Commercial products are available to reduce interference from these sources.
Consult your dealer or professional amateur radio supplier.
Even though the transceiver has ANL and NB controls, in some installation
ignition interference may be high enough to make good communications
impossible. The electrical noise may come from several sources. Many
possibilities exist as variations between vehicles require different solutions to
reduce the noise.
ANTENNA
For best transmission and reception, your transceiver should use an antenna
especially designed for a frequency of 27 MHz. Antenna is to be purchased
separately and it comes with the installation instructions. Numerous types of
antennas are available. Some emphasize on ease of installation while others
emphasize on performance. Often the difference in performance for these
antennas is modest.
1. Vertical Ground Plane Antenna : Omni directional antennas provide
optimum performance for contacting other fixed stations using vertical
type antennas in addition to all mobile stations. For medium long range
communications work.
Ground Plane
2. Directional Beam Antenna : Highly efficient and directional antenna
generally intended for fixed-to-fixed long range communications.
Directional Beam Antenna
- 3 -
- 4 -
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.
PHONE JACK
This PHONE jack accepts headphone of 4 to 32 ohms impedance. When a
headphone is plugged into this jack, both internal and external speakers are
silenced simultaneously.
PUBLIC ADDRESS
To use the transceiver as a public address system, connect an external 8 ohms
speaker (4 watts minimum) to the PA. SP. jack located on the rear panel.
Direct speaker away from the microphone to prevent acoustic feedback.
Physical separation or isolation of the microphone and speaker is important
when operating the PA at high output levels.
CHAPTER 3 OPERATION
CONTROL FUNCTIONS
FRONT PANEL
POWER
TALKBACK
OFF
PHONES
MIC
RF POWER
MIC RF
9
7
+20
S
5
+40
3
1
60%
80%
40%
100%
20%
9
12
6
3
0
1.5
SWR
1
SWR PWR
DIM TONE
2
MOD
15
3
DX 2547
MAX
MOD
PWR
AM / SSB Base Station CB Radio
dB
+60
CHANNEL
RX / TX
R. B.
PA
GNF R.B. PA AMNBUSB
SWR ALERT
USB
LSB
ANL
NB
ANL
CLARIFIER
GNF
CLARIFIER
AM
LSB
OFF
1. PHONE JACK : Used to connect headphones for listening.
2. MICROPHONE JACK : Used to connect microphone for voice source.
3. RF POWER CONTROL : This control allows the user to adjust RF
power output.
4. RF GAIN CONTROL : This control is used to reduce the gain of the RF
amplifier under strong signal conditions.
5. MIC GAIN CONTROL : Adjust 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 function as the volume control.
NORMAL
9
SQUELCH
VOLUME
19
- 5 -
- 6 -
Loading...