Columbia Telecommunications Group MURS2 Users Manual

6. Instruction Manual

1) Safety Information

Safety Information For MURS UNIT

Your wireless handheld portable transceiver contains a low power(2watts)
Transmitter.
When the Push-to Talk (PTT) button is pushed it sends out radio frequency (RF) signals.
This device is authorized to operate at a duty factor not to exceed 50%.
In August 1996, the Federal Communications Commission (FCC) adopted RF exposure
guidelines with safety levels for hand-held wireless devices.

Important Note: To maintain compliance with the FCC's RF exposure guidelines, hold

the transmitter and antenna at least 1 inch (2.5 centimeters) from your face and speak in a
normal voice, with the antenna pointed up and away from the face.
If you wear the handset on your body while using the headset accessory, use only the
manufacturers supplied belt clip for this product and ensure that the antenna is at least 1
inch (2.5 centimeters) from your body when transmitting.

Use only the supplied antenna. Unauthorized antennas, modifications, or attachments
could damage the transmitter and may violate FCC regulations.

THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS
SUBJECT TO THE FOLLOWING TWO CONDITIONS:
(1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND
(2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING
INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.

2) General

a) General

This equipment, MURS is called 2 way portable handheld radios.
The frequency range is 151.820¡-154.600MHz, VHF operating channels for
International 2 way portable radios.

b) Characteristic

a. All active devices in this radio is composed of semiconductor and high density
IC.
b. To design this radio in compact and weight approximately 140g including
Battery.
c. CPU of this equipment is HD4074899TE from HITACHI.
d. It’s power can operate by use of alkaline 4 cell (1.5V AA) battery.
c) Composition
This radio is composed of following.
a. Transmitter (W/Antenna)

b. Belt clip
c. Ni-MH battery (option)

3) Specification

a) General Specification

a. Frequency Range: 151.820 ¡- 154.600MHz

Weather Range: 161.650 ~ 163.275 (Receiver Only)
b. Output Impedance: 50¥ØUnbalanced
c. Modulation Type: 8K0F3E

d. Communication Mode: Half duplex

e. Channel Capacity: 5 channels(MURS), 10 channels(WX)

f. Channel spacing: 12.5 KHz

g. Power: 6.0V(alkaline)
h. Battery Life: ALCA.2600mAh >40 hours (Tx5%, Rx5%, Stand-by 90%)
i. Operating Temperature: -20¡É¡-+60¡É
j. Dimension: 95.5(H) x 50(W) x 26(D) mm
k. Weight: 140g(with Battery)
b) Electrical Specification
a. Transmitter

1. Output power: Max. 2.0W

2. Frequency Stability: ¡¾2.5 ppm (-20¡É¡-+60¡É)

3. Modulation Method: FM

4. Oscillation Method: PLL SYNTHESIZER

5. Max. Frequency Deviation : < ¡¾2.5 KHz (with tone)

6. Cooling Method: air-cooling Method

7. Spurious Emission: < 60dB

8. FM Hum/Noise: > -40dB(1kHz 60% modulation, w/CCITT)

9. Distortion: < 5% (1kHz 60% modulation)

10. Tx Audio Response: 6dB /OCT ¡¾3dB PRE-EMPHASIS (300Hz¡-2.5kHz)

b. Receiver

1. Receive Method: Double Super Heterodyne

2. Receive Sensitivity: < 0.28uV(20dB SINAD w/CCITT)

3. Squelch Sensitivity: 6¡-8dB(12dB SINAD)

4. Bandwidth: > 3kHz(6dB ATT point)

5. Selectivity: < -60dB(12.5kHz)

6. Local Frequency Stability: ¡¾2.5ppm(-20¡É¡-+60¡É)

7. Spurious Response: > 40dB

8. Audio output: 200mW(Internal 8¥Ø load THD 10%) Ext.100mW

9. Distortion: < 5% (1kHz 60% Modulation)

10. RX Audio Response: 6dB/OCT ¡¾3dB DE-EMPHASIS (300Hz¡-2.5kHz)

11. S/N Ratio: < 40dB(1kHz 60% modulation w/CCITT)

12. IF: 1'st IF = 21.7MHz
2'nd IF = 450kHz

13. Local Frequency: 1st Local Frequency = fc - 21.7MHz
2nd Local Frequency = 21.25MHz

4) Operation

a) Key Name

a. Function and Controls

1. Antenna

2. Belt Clip

3. Detachable Belt Clip Button

4. Power Switch

5. Mode/Scan Button

6. Vox Button

7. Lock Button

8. Wx Button

9. Built-in Microphone

10. Battery Cover

11. Charge Terminal

12. External Mic/Speaker

13. LCD Display

14. Push-To-Talk (PTT)

15.Monitor Button

16. Call Button

17. Up Down Button

18. Built-in Speaker

b) Icons on LCD

a. RSSI (Receiving Signal Strength Indicator) Icon

Indicates the receiving signal strength

b. Monitor or Receiving Indicator

Appears busy icon when the monitor button is long (about 0.5 sec.) used.
Short press the Mon button and would be emitting the backlight lamp during
5 seconds.

c. CTCSS Indicator

Tone digits blink before when the select CTCSS tone CH.

d. Auto Channel Scan Indicator

SCAN icon appears in the auto scan mode or when the auto scan mode is
activated.

e. Key Lock Indicator

Blinks in auto lock selection mode or when the key lock is activated.