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4.4.1. Detailed Radio parameters
The very first parameter which is often required for consideration is the receiver sensitivity. Anyone
interested in the wireless data transmission probably aware what this parameter means, but we should
regard it simultaneously in its relation to other receiver parameters, especially blocking and desensitiz-
ation. Today's wireless communication arena tends to be overcrowded and a modern radio modem,
which is demanded to compete with others in that environment, should have good dynamic range that
is defined by the parameters listed above. Receiver of a radio modem, which is designed purely for
optimum sensitivity, will not be able to give proper performance. However, the main receiver parameters
determining its dynamic range go against each other and a clear trade-off between the sensitivity and
the blocking is therefore an essential assumption. Then, from the viewpoint of a logical comparison,
the consequence of better receiver sensitivity can be easily seen – a lower power level of the blocking
and degradation parameters generally.
Blocking or desensitization values were determined according to the standards EN 302 561 V1.2.1 for
50 kHz channel, EN 300 113-1 V1.7.1 for 25 and 12.5 kHz channels, and ETSI 301 166-1 V1.3.2 for
channel 6.25 kHz.
Tab. 4.8: Unlimited 50 kHz
Classification
kbps
FEC
Modulation
15.62
0.75
2CPFSK
20.83
1.00
2CPFSK
31.25
0.75
4CPFSK
41.67
1.00
4CPFSK
31.25
0.75
41.67
1.00
62.49
0.75
π/4-DQPSK
83.33
1.00
π/4-DQPSK
93.75
0.75
125.00
1.00
125.00
0.75
16DEQAM
166.67
1.00
16DEQAM
Classification
kbps
Modulation
20.83
2CPFSK
41.67
4CPFSK
41.67
83.33
π/4-DQPSK
125
166.67
16DEQAM
© RACOM s.r.o. – RipEX Radio modem & Router
Unlimited 50 kHz Rx
Sensitivity [dBm]
BER 10
-114
-113
-108
-107
DPSK
-112
DPSK
-111
-107
-106
D8PSK
-101
D8PSK
-100
-98
-97
Unlimited 50 kHz Tx
Emission
24K0F1DBN
24K0F1DDN
DPSK
45K0G1DBN
45K0G1DDN
D8PSK
45K0G1DEN
45K0D1DEN
-2
-3
BER 10
BER 10
-111
-107
-110
-106
-105
-101
-104
-100
-109
-105
-108
-104
-104
-100
-103
-99
-98
-94
-97
-93
-95
-91
-94
-90
OBW 99% [kHz]
Blocking or
desensitization [dBm]
-6
±1 MHz
±5 MHz
-16
-14
-16
-15
-19
-18
-19
-19
-12
-10
-12
-11
-4
-4
-5
-5
-8
-8
-8
-8
-6
-6
-6
-6
26 dB Bandwidth
22.1
23.9
45.1
44.8
45.3
44.7
Product
±10 MHz
-14
-14
-18
-18
-9
-9
-3
-4
-8
-8
-5
-5
30.6
31.7
51.0
51.0
51.3
51.0
59
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