9
1.1.1. Communication range and bitrate of Sigrand modems
Brief information on communication range and bitrate of Sigrand SG-17B
modems is given in Table 1. The results were obtained with the length of
lines providing the value of Bit Error Rate (BER) equal or less than 10
-7
. The
specified value of communication range is proved experimentally at the test
communication line of Sigrand Laboratory. The complete Table of bitrates is
shown at www.sigrand.com. The actual results shown at a real
communication line may differ from the specified values because of
possible diversities in the parameters of the lines.
Table 1
Bitrate
(Kb per second)
Linear code
Parameter
Cable
ТПП100-0.5
15296
ТСРАМ128
Length (km)
0,6
R (Ohm)
150
10240
ТСРАМ64
Length (km)
1,8
R (Ohm)
324
7168
TCPAM64
Length (km)
2.8
R (Ohm)
504
5696
TCPAM32
Length (km)
3.4
R (Ohm)
612
3072
TCPAM16
Length (km)
5
R (Ohm)
900
2304
TCPAM16
Length (km)
5.4
R (Ohm)
972
1024
TCPAM16
Length (km)
7.8
R (Ohm)
1404
512
TCPAM16
Length (km)
9.0
R (Ohm)
1800
The actual bitrate range may happen to be limited with 5.7 Mb per second in
case the modems are used in combination with some types of interfaces
issued before 2009 which have bitrate limitations.
