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Installing and putting a TIM into operation
5.4 Options for attachment and settings of the TIM 3 and TIM 4 variants
Attenuation values of the MD2 modem
Table 5-21
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 5-22
Transmission
Core diameter 0.6 mm
9,600 / 19,200
Core diameter 0.8 mm
9600 / 19,200
Core diameter 0.9 mm
9600 / 19,200
Core diameter 1.2 mm
9600 / 19,200
Core diameter 1.4 mm
9600 / 19,200
NTP = number of tapping points
*) not permitted with postal leased lines. Transmit level must be set to –9 dB.
The values in the table are guidelines.
184
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
1200
36.2 – NTP x 0.9
2400
29.6 – NTP x 0.6
11.9 – NTP x 0.9
1200
50.1 – NTP x 1.3
2400
43.4 – NTP x 0.8
17.2 – NTP x 1.3
1200
59.2 – NTP x 1.5
2400
54.3 – NTP x 1
20.6 – NTP x 1.5
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
36.6 – NTP x 0.5
30 – NTP x 0.2
12.6 – NTP x 0.1
50.7 – NTP x 0.7
44 – NTP x 0.3
18.3 – NTP x 0.2
60 – NTP x 0.8
55 – NTP x 0.4
22 – NTP x 0.2
Attenuation
per LTOP
1.4
(dB)
0.55
0.2
0.6
0.2
1.5
1.0
Transmit level 0 dB
With LTOP
25.7 – NTP x 0.6
20.8 – NTP x 0.4
8.6 – NTP x 0.6
33.5 – NTP x 0.7
27.5 – NTP x 0.5
11.5 – NTP x 0.7
42.8 – NTP x 0.9
35 – NTP x 0.6
14.2 – NTP x 0.9
59.3 – NTP x 1.3
51.4 – NTP x 0.8
20.5 – NTP x 1.3
70.1 – NTP x 1.5
64.3 – NTP x 1
24.6 – NTP x 1.5
SINAUT ST7 Station control system - System Manual
System Manual, 05/2007, C79000-G8976-C178-06
Insertion
loss per
tapping point
(dB)
0.4
0.2
0.2
*)
Without LTOP
26 – NTP x 0.3
21 – NTP x 0.2
9 – NTP x 0.1
33.9 – NTP x 0.4
27.8 – NTP x 0.2
12.1 – NTP x 0.1
43.3 – NTP x 0.5
35.4 – NTP x 0.2
15 – NTP x 0.1
60 – NTP x 0.7
52 – NTP x 0.3
21.6 – NTP x 0.2
70.9 – NTP x 0.8
65 – NTP x 0.4
26 – NTP x 0.2
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