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
Unlimited 50 kHz Rx
Blocking or
desensitization [dBm]
Sensitivity [dBm]
Classification
±10 MHz
±5 MHz
±1 MHz
BER 10
-6
BER 10
-3
BER 10
-2
Modulation
FEC
kbps
-14
-14
-16
-107
-111
-114
2CPFSK
0.75
15.62
-14
-15
-16
-106
-110
-113
2CPFSK
1.00
20.83
-18
-18
-19
-101
-105
-108
4CPFSK
0.75
31.25
-18
-19
-19
-100
-104
-107
4CPFSK
1.00
41.67
-9
-10
-12
-105
-109
-112
DPSK
0.75
31.25
-9
-11
-12
-104
-108
-111
DPSK
1.00
41.67
-3
-4
-4
-100
-104
-107
π/4-DQPSK
0.75
62.49
-4
-5
-5
-99
-103
-106
π/4-DQPSK
1.00
83.33
-8
-8
-8
-94
-98
-101
D8PSK
0.75
93.75
-8
-8
-8
-93
-97
-100
D8PSK
1.00
125.00
-5
-6
-6
-91
-95
-98
16DEQAM
0.75
125.00
-5
-6
-6
-90
-94
-97
16DEQAM
1.00
166.67
Unlimited 50 kHz Tx
26 dB Bandwidth
OBW 99% [kHz]
Classification
Emission
Modulation
kbps
30.6
22.1
24K0F1DBN
2CPFSK
20.83
31.7
23.9
24K0F1DDN
4CPFSK
41.67
51.0
45.1
45K0G1DBN
DPSK
41.67
51.0
44.8
45K0G1DDN
π/4-DQPSK
83.33
51.3
45.3
45K0G1DEN
D8PSK
125
51.0
44.7
45K0D1DEN
16DEQAM
166.67
RipEX Radio modem & Router – © RACOM s.r.o.
54
Product
Summary of Contents for RipEX 1.6.0
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