Module Descriptions, RFL 9508D Digital Section
8.7.2
DATA TRANSMISSION CHARACTERISTICS
This transceiver is intended for use on connections on Power Line Carrier Systems on point-to-point,
mesh, hierarchical or star topology. The principal characteristics of the transceiver are as follows:
a) Duplex operation mode.
b) Channel separation by echo canceller techniques.
c) Quadrature Amplitude Modulation (QAM) for each channel with synchronous line transmission at
selectable symbol rates of 2400, 2743, 2800, 3000, 3200 and 3249 symbols/s with a 4KHz QAM
spectrum bandwidth; and 4800, 5486, 5600, 6000, 6400 and 6498 symbols/s for an 8 KHz QAM
spectrum bandwidth.
d) Depending on the Power Line Conditions, the following standard synchronous channel data bit rates
can be achieved: 62400, 57600, 52800, 48000, 43200, 38400, 33600, 31200, 28800, 26400, 24000,
21600, 19200, 16800, 14400, 12000, 9600, 7200, 4800 and 2400 bit/s.
e) Trellis coding for all data signaling rates.
f) Adaptive techniques that enable the modem to achieve close to the maximum data signaling rate the
channel can support on each connection.
g) Exchange of rate sequences during start-up to establish the data signaling rate.
h) Modulation: It is an Adaptive Trellis Code Modulation with Multidimensional Error Correction
resulting in fractional bits per symbol, from 4-QAM to 1024-QAM, depending on the Power Line
Conditions and Bandwidth available.
RFL 9508D UCC
RFL Electronics Inc.
March 11, 2010
8-35
(973) 334-3100
