RFL 9508
RFL Electronics Inc.
June 2005
3
RFL 9508D UCC
DIGITAL Interface Modules
MA-470 is interfaced to the transceiver and provides the digi-
tal interface for the UCC Packetizing Multiplexer.
The RFL optional MA-490, is an RS232/Telnet I/O adapter
module used in RFL 9508D UCC for Telnet link capability.
This module contains one Ethernet port and two RS-232 ports.
The basic function of this module is to provide connectivity to
the RFL 9508D UCC via an Ethernet network.
Man Machine Interface
•
Automatic Gain Control (AGC) to compensate for
variations in signal level caused by line attenuation
changes. If the teleprotection received signal level
varies more than 40 dB from normal in the regulation
range of -20 to +20 dB or -26 to +14 dB, a relay and
LED will indicate an alarm. Additionally the AGC func-
tions to perform the signal-to-noise squelch which
disables the system and initiates an alarm under
excessive noise conditions.
Architecture of Digital Chassis
The Transceiver and the IMUX Common Module are mounted
in a 19" wide chassis. The connection between the two is an
E1 or T1 link with shared RS232 port and power. The CM4
common card, MTS, and digital link card are in the IMUX side
of the chassis while the transceiver is on the PLC side of the
chassis.
Programmable RF Test
Generator
The Transceiver can generate an RF test tone between 20
and 500 kHz to be transmitted over the power line carrier
path.
The RF chassis comprises the RF Hybrid, RF Impedance
Adapter, Loop Back Test Module, RX Filter, TX Filter, Dummy
Load, Power Monitor and 50W power amp.
The RF Interface is located at the top in the RF chassis. Test
points are found inside the front panel: Line TX (after transmit
filter), Line RX (before front-end filter) and Line (after the Hy-
brid). These signals facilitate equipment testing and com-
missioning.
The Skewed Hybrid efficiently separates the send and re-
ceive frequencies. Use of a skewed hybrid keeps losses in
the send direction very low (0.5 to 1 dB).
RF Chassis
to the NCO, adjust output power level, as well as to measure
the SNR, alarms, etc. See figure 2 for typical setup screen.
Packetizing Multiplexer - Utility
Communications Center
The RFL 9508D UCC can be used as a Utility Communica-
tions Center (UCC) because of it’s unique ability to integrate
voice and data traffic across a single, converged network uti-
lizing a multi-service access gateway that uses data packets
switched for distributed substation utility applications.
The versatility of the RFL 9508D UCC helps to take advan-
tage of the narrow bandwidth available over the Power Lines
without sacrificing quality of service for voice and data appli-
cations.
Analog and digital telephony channels as well as data inter-
faces and serial data ports are supported by the RFL 9508D
UCC. These are optimized specifically for distributed enter-
prise networks that have needs for multiple WAN connectiv-
ity requirements and differing needs for functionality, density,
performance and connectivity.
The product is extremely flexible and easy to configure and
manage. As a modular voice and data solution, the RFL 9508D
UCC platform delivers ease of use and scalability in a fully
integrated, stand-alone form factor.
Figure 2.
Typical Setup Screen
A Windows® (W95, W98, ME, W2000, NT and XP) program
allows the user to configure all RFL 9508D UCC parameters;
the channel mapping for the SSB/E1/T1, load the carrier fre-
quency
Delivers High Quality Over
Narrow Bandwidth
The RFL 9508D UCC offers state of the art prioritization and
voice/data compression technology that provides superior qual-
ity of service with minimal bandwidth utilization, providing high
compression voice and data transport over the Power Lines.
September 2007
