ARLA/CLUSTER: PMR´s em 2,4 GHz com 256 canais (spread spectrum) e OFDM ?

[João Costa > CT1FBF]

DICOM PR20 – Personal role radio

New equipment

The PR20 personal role radio operates in 2.4 GHz frequency band using
spread spectrum waveform – combination of time hopping, frequency
hopping and OFDM (Orthogonal Frequency Division Multiplex). It is
primarily designed for operation groups of up to 30 persons (but it
also supports networks with unlimited number of participants) allows
for full duplex communication in ad-hoc digital networks with no
additional infrastructure required. Automatic rebroadcasting (packet
routing), space diversity transmission and reception, high speed data
transmission, long battery life and relay to higher level network are
standard features.



Operating features:

• duplex voice communication in a group of up to 30 users,
• semi-duplex voice communication without limiting the number of users,
• conference call of up to four users,
• communication in another net (via a transceiver connected to the
other net), • wireless PTT-keying,
• learning mode for wireless PTT key assigning,
• VOX keying,
• USB data interface (data expander available),
• simple operation,
• erasure of entered parameters,
• 8 presets,
• volume regulation in four steps.


Technical parameters:

•Frequency range 2400.0 MHz to 2483.5 MHz
•Modulation type OFDM, frequency and time hopping
•Number of channels 256
•Number of presets 8
•Duplex data transmission simultaneously with voice 16 kbit/s
•Fast data-only mode 160 kbit/s
•Transmission power 100 mW +0/-6 dB EIRP
•Receiver noise number max. 4 dB
•Non-linear distortion factor max. 10 %
•Audio band 300 Hz to 3000 Hz
•Nominal supply voltage 3.7 V
•Limit supply voltage 3.0 V to 5.2 V
•BP200 battery pack capacity 4.2 Ah
•Current consumption max. 0.4 A
•Operation time (transmission : reception : stand-by) 1 : 1 : 10 24
hours (with BP200 battery pack)
•Operating temperature range -30 °C to +50 °C
•Immersion to 1 m
•Environmental specification according to MIL-STD-810E
•EMC according to MIL-STD-461E
•Radio dimensions including BP200 battery pack W 78 mm x H 133 mm x D 27 mm
•Dimensions of BP200 battery pack W 78 mm x H 63 mm x D 27 mm
Weight:

• PR20 personal role radio max. 0.23 kg
• BP200 battery pack max. 0.22 kg


Published by CQDX.ru
Date: 24 Aug 2013