Communication solutions for power utilities
UNIVERSAL POWER-LINE CARRIER SYSTEM TYPE OPU-1
WHOLE BAND QAM MODEM MBPU - Rev. 0 (July 2011)
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4.3 LEVELS
The transmit and receive levels must be programmed when the AF signals are routed by
means of the ZQBT terminal block (jumpers J10 and J11 in position B).
The programming of the input and output levels associated to the corresponding option, for
example Digital Transit Filter, is carried out from the OPU-1 Management System, by
means of the
Input levels
and
Output levels
options
of the basic equipment, by establishing
a level of -7 dBm.
4.4 CONFIGURATION
STORAGE
The modem configuration includes the operation options selected for a particular
application. This configuration can be modified locally by means of the AT commands or by
the internal microswitches and jumpers in the module.
The modem has a configuration storage area, known as the user profile, that is situated in
the E2ROM non-volatile memory. The moment it is started up, or after a software reset
(command ATZ), the modem loads the contents of the user profile, using it from then on as
active configuration. In order to modify the user profile it is only necessary to:
−
Change the necessary operative parameters of the modem by means of the corresponding
commands, and
−
store the resulting active configuration in the user profile available, by means of the
command AT&W.
The modem also has a fixed configuration, known as factory profile, that is stored in the
read-only memory. The user can retrieve this profile (by means of AT&F) and convert it into
the active configuration of the modem, and store it as the user profile by defect (by means of
AT&W).
A factory profile is re-established as an active configuration by means of AT&F command.
The active configuration can be displayed by means of the AT\S command, whilst the AT&V
command shows the factory and user profile.