PLCA-22 Power Line Communications Analyzer
Model 58022
Description
The PLCA-22 Power Line Communications Analyzer
provides a simple, cost-effective method for field testing
the operation and suitability of Echelon’s PLT-22 transceiver
for any application. By using the PLCA-22 in actual applica-
tion environments (e.g., residences, commercial buildings,
factories), users can quickly determine the performance of
the PLT-22 transceiver as well as the need for routers, condi-
tioning devices such as couplers, or booster amplifiers.
PLCA-22 analyzers are used in pairs: one unit sends
sequentially numbered packets whose length and protocol
service type is set by the user and the other unit receives the
packets and displays errors as a percentage of the total number
of packets sent. The PLCA-22 analyzers automatically
exchange test configuration information between one another,
minimizing the need for a user to access both analyzers during
testing. Either analyzer can be programmed to be the Sender or
the Receiver, and when one unit is set to be the Sender, the
other automatically becomes the Receiver. At the end of a test,
the packet error rate seen by the Receiver is automatically
forwarded to the Sender for display, eliminating the need to
physically observe the Receiver for test results.
Rapidly Assess Communication Performance
The user interface and flexible features of the PLCA-22
analyzer permit rapid characterization of PLT-22-based
L
ONWORKS
®
networks. Dual signal strength LED bar meters,
one for each of the two PLT-22 carrier frequencies, indicate
both the signal level of incoming packets and the power line
noise level when packets are not being transmitted. When
combined with the packet error rate display, the signal strength
and noise level readings indicate the suitability of a circuit for
power line communications. A headphone/oscilloscope jack
allows users to audibly or visually assess signal and noise
characteristics.
Additional features include:
Operates Over Two Frequency Bands: The user can select
between operation in the frequency range of 110kHz to
140kHz (C-band mode) or from 70kHz to 95kHz (A-band
mode). The first frequency range is the standard for most
automation applications, while the second range is typically
used for meter reading in Europe. Adjustable Transmit Level:
Users can select a 1.7, 3.5, 7, or 10Volts peak-to-peak (p-p)
output level with a 1Amp or 2Amp p-p current limit. This
feature allows the user to determine the value of using a higher
PLT-22 output voltage or a PLA-21 Amplifier.
Adjustable Attenuation: The transmit signal can be attenuat-
ed in discrete steps to determine the system operating margin.
This feature helps the user determine how close a system is to
its operating limit.
Automatic Phase Detection: Since “As-Built” drawings are
often unavailable or inaccurate, a phase detector feature is
provided to determine the relative distribution phase between a
pair of power mains circuits. This greatly simplifies system
commissioning and troubleshooting.
Supports Virtually Any Mains Circuit
The PLCA-22 offers both Line-to-Neutral and Line-to-
Earth coupling through the built-in AC line cord, or through a
custom coupling network connected to the external coupling
connector. The external coupling connector enables the PLCA-
22 analyzer to communicate over virtually any AC or DC
voltage power mains, and even over un-powered twisted pair.
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Simple, cost-effective power line communication test tool
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Analyzes power line signaling performance and signal
margin of the PLT-22 power line transceiver
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Helps identify if routers, conditioning devices or booster
amplifiers are needed
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Determines power circuit phase
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Supports virtually any AC or DC mains voltage,
or un-powered wire
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Ideal for testing the power line performance
of PLT-22-based nodes
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RS-232 port for data logging
(44 pages)
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