Table of Contents
Advertisement
Transmission speeds and frequencies of the MD2 modem
Table 6-19
Transmission
speed (bps)
1200
2400
9600 / 19,200
Attenuation values of the MD2 modem
Table 6-20
Transmission
speed (bps)
Line terminated with Z = 600 ohms
1200
2400
Line terminated with Z = 150 ohms
9600 / 19,200
The values in the table above are guidelines for communication lines without loading coils of
the type 2 x 2 x A J-Y(St)Y (A = core diameter in mm).
Maximum range of the MD2 modem
Table 6-21
Transmission
Core diameter 0.6 mm
9,600 / 19,200
Core diameter 0.8 mm
9600 / 19,200
SINAUT ST7 Station control system - System Manual
System Manual, 05/2007, C79000-G8976-C178-06
Transmission speeds and frequencies of the MD2 modem
Center frequency
[Hz]
1700
2850
27,200
Attenuation values dependent on the transmission speed and wire diameter
Attenuation per km (dB) at wire diam. (mm)
0.6
1.5
1.85
4.3
Maximum range dependent on the transmission speed and wire diameter
speed (bps)
With LTOP
1200
21.7 – NTP x 0.6
2400
17.6 – NTP x 0.4
7.2 – NTP x 0.6
1200
28.3 – NTP x 0.7
2400
23.2 – NTP x 0.5
9.6 – NTP x 0.7
Installing and putting a SINAUT modem into operation
Frequency
deviation Δf (Hz)
400
450
6400
0.8
0.9
1.2
1.15
0.9
0.65
1.4
1.1
0.75
3.2
2.6
1.8
Maximum range (km)
Transmit level –6 dB
*)
Without LTOP
22 – NTP x 0.3
17.8 – NTP x 0.2
7.6 – NTP x 0.1
28.6 – NTP x 0.4
23.5 – NTP x 0.2
10.3 – NTP x 0.1
6.4 MD2 dedicated line modem
Lower keying
Upper keying
frequency (Hz)
frequency (Hz)
1300
2100
2400
3300
20,800
33,600
Attenuation
per LTOP
1.4
(dB)
0.55
0.2
0.6
0.2
1.5
1.0
Transmit level 0 dB
With LTOP
Without LTOP
25.7 – NTP x 0.6
26 – NTP x 0.3
20.8 – NTP x 0.4
21 – NTP x 0.2
8.6 – NTP x 0.6
33.5 – NTP x 0.7
33.9 – NTP x 0.4
27.5 – NTP x 0.5
27.8 – NTP x 0.2
11.5 – NTP x 0.7
12.1 – NTP x 0.1
Insertion
loss per
tapping point
(dB)
0.4
0.2
0.2
*)
9 – NTP x 0.1
259
Advertisement
Table of Contents
