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Quantum and Evolution Series Installation and Operating Handbook
3. Connect the data interfaces in parallel and configure the two units alike. Suitable
adapter cables are available from Paradise Datacom for all of the standard
interfaces.
4. If the Ethernet traffic port is used on the modem, then the two traffic ports may be
connected to a hub or other multi-port LAN device using RJ45 crossover cables.
5. Connect the two transmit IF ports to the input ports of a suitable power
splitter/combiner of the correct impedance (50Ohm or 75Ohm) and the appropriate
frequency range. The combined output is fed to the up-conversion equipment.
Note that only one output is active at a time. Because of the signal loss associated
with splitter/combiners, the power level at the output of each modem needs to be
increased by approximately 3.5dB.
6. Connect the two receive IF ports to the two output ports of a suitable
powersplitter/combiner of the correct impedance (50Ohm or 75Ohm) and the
appropriate frequency range. Both demodulators will receive an identical signal
from the down-conversion equipment via the splitter/combiner. Because of the
wide dynamic range of the modem AGC circuitry, there should be no need to
modify signal levels.
7. Check correct operation by performing a manual switch between the units (via the
Unit-Advanced-Operation menu). The pair will not switch over unless the standby
unit is operational (i.e. does not indicate any fault). (Note that the pair can be
tested in loopback mode but this requires the IF signals to be split and combined
and looped back to the other unit. Looping the output of one unit back to its self will
not work since the standby unit output is muted and it will therefore not detect any
carrier.)
8.5 Software Activated Features
While some modem functions are available as plug-in option cards, the majority of
additional functions are made available through Software Activated Feature (SAF)
support. As the name implies, these are modem features that can be enabled by entering
a feature code via any of the modem's user interfaces. Feature codes are encrypted
codes issued by Paradise Datacom, uniquely associated with individual modems.
To allow evaluation of modem features, all of the SAF features of the modem that it is
capable of supporting can be activated for a 10-day period by entering a feature code of
0. This is referred to as Demonstration Mode. Demonstration Mode can be activated up
to three times after which any further attempts to use it will be rejected. Note that it is not
necessary to wait for Demonstration Mode to time out before reactivating it – it can be
activated twice to give a 20-day demonstration period and three times to give 30 days.
The user will be alerted shortly before the demonstration period times out. As well as
allowing feature evaluation, Demonstration Mode can be used to test compatibility with
other equipment and allows rapid substitution of equipment in a crisis.
To enable one or more features permanently (referred to as Permanent Mode), a
modem-specific feature code needs to be obtained from Paradise Datacom. The code is
tied to the modem serial number (available via the user interfaces and on the back
panel).
The features that have been temporarily enabled on a modem can be viewed along with
the time remaining before they become disabled, as can the features that have been
permanently enabled and those that can potentially be enabled.
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