SWT 3000 Equipment Manual Functional Description
© SIEMENS AG 2008 Edition p3_3_2x 08/09 Page - 13
Equipment versions
Equipment is available in broadband and narrow band versions depending on the application.
Broadband version
Application:
This equipment version is intended for operation over all communication
paths (4-wire connections ), preferably over PLC links. It offers a high
level of security against impulse interference and interference voltages.
Frequency space: In this equipment version the wanted frequencies are distributed over the
complete frequency space available. In conjunction with PLC transmis-
sion frequency space in the 2.5 kHz or 4 kHz channel arrangement is re-
quired for each operating direction.
With CF and radio relay routes and cable connections an ITU-T voice
band from 0.3 ... 3.4 kHz is used for each operating direction.
VF cable connections The following diagram shows a four-wire connection over a VF cable.
Broadband variants VF1 to VF5 can be used.
T
R
T
R
SWT 3000 SWT 3000
NFx NFx
NFx Frequency variant VF1 - VF5
T Transmitter
R Receiver
Figure 5: SWT 3000 four-wire connection via VF cable
PLC connections Variants VF1 to VF5 are used in conjunction with PowerLink PLC sys-
tems depending on the assignment of the transmission band.
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