Siemens SINAUT ST7 - Frequencies, Attenuation and Maximum Range

Technical Data
© Siemens AG 2002 All Rights Reserved 6NH7811-0AA22
MD2 Modem (07/2002)
6-5
6.2.3 Frequencies, Attenuation and Maximum Range
Transmission Speeds and Frequencies
Table 6-1 Transmission speeds and frequencies on the dedicated line
Transmission
speed (bps)
Mid-
frequency
(Hz)
Frequency
deviation Df
(Hz)
Lower keying
frequency
(Hz)
Upper keying
frequency
(Hz)
1200 1 700 400 1 300 2 100
2400 2 850 450 2400 3 300
9600 / 19200 27 200 6 400 20 800 33 600
Attenuation Values
Tabelle 6-2 Attenuation in relation to the transmission speed for non-coil-loaded
telecommunication lines of type 2 x 2 x A J-Y(St)Y (A = core diameter in mm).
Loss per km (dB) for
core diameter (mm)
Transmission
speed (bps)
0.6 0.8 0.9 1.2 1.4
Loss
per LTOP
(dB)
Insertion loss per
tapping point
(dB)
Line termination with Z = 600 Ohm
1200 1.5 1.15 0.9 0.65 0.55 0.4 0.4
2400 1.85 1.4 1.1 0.75 0.6 0.4 0.2
Line termination with Z = 150 Ohm
9600 / 19200 4.3 3.2 2.6 1.8 1.5 2.0 0.2