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Retevis KDR/ SRBR 444MHz License-free Two Way Radio

$39.99~$39.99
SKU: LF003

1, License-free Band KDR/SRBR444

2, Delivery time: About 7 business days.

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Description:

KDR444 (Norwegian "kortdistanseradio", Swedish "kortdistansradio", "short distance radio") or KDR, is a licence-free personal radio service in the UHF range used in Sweden and Norway. It is usually referred to as SRBR444 (Short Range Business Radio) in Sweden. Transmitters are limited to 2W ERP (previously 1W) in Sweden and 0.5W in Norway. FM with a bandwidth of 25 kilohertz is used. Norway require a radio with fixed antenna to be used with these frequencies.

 

Features:

  1. Indicator
  2. Channel Switch
  3. Power Switch
  4. Monitor
  5. Squelch level
  6. TOT
  7. Scan
  8. CTCSS
  9. Voice Annunciation
  10. Power Saving Function
  11. Battery Voltage Alert
  12. Busy Channel Lockout
  13. VOX
  14. QT/DQT
  15. Local alarm function

 

Norway has 6 channels, while Sweden has 8 channels. Note that channel 6 is different in Norway and Sweden.

 

Norway

Sweden

Channel

Frequency (MHz)

Frequency (MHz)

1

444.6000

444.6000

2

444.6500

444.6500

3

444.8000

444.8000

4

444.8250

444.8250

5

444.8500

444.8500

6

444.9750

444.8750

7

 

444.9250

8

 

444.9750

 

KDR 444 is specific to parts of Scandinavia and is not cleared for use across the European Union.

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Preview :

Technical parameters:

General Specifications

Frequency Range

444.600-444.975 MHz

Frequency range

 

Channel Capacity

6 or 8

Channel Spacing

12.5KHz/25kHz

Antenna Impedence

50Ω

MIC Impedence

2.2kΩ

Working Voltage

3.7V DC

Frequency Stability

±2.5×10-6

Weight

252g

Dimensions (WxHxD)

58x135x32mm

Transmitter

Output Power

2W

Modulation Sensitivity

12±3mV

Modulation Distortion

≤5%

Carrier Frequency Tolerance

±2.5×10-6

Modulation Limit

≤5kHz

Occupied Bandwidth

≤16 kHz

Modulation Characteristic

±3dB

Spurious Radiation

≤7.5 μW

Adjacent Channel Selectivity

≤-65 dB

Transmitting SNR

≥40 dB

Receiver

Reference Sensitivity

-121dBm

Squelch Sensitivity

≤0.22 μV

Audio Power

1000mW

Audio Distortion

≤5%

Modulation RX Bandwidth

≥±7kHz

Audio Response

 ≥+2dB, ≤-10dB

Co-channel Injection

≥-8 dB

Block

≥85 dB

Channel Selectivity

≥65 dB

Receiving SNR

≥40 dB

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