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- HackersCatalog.com
Technical notes section is an online guide to
help in answering some general questions, at
no time will we answer questions on how to
use our products or information for illegal
purposes. All information sold on
HackersCatalog.com is for educational
purposes only.
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- Technical
Notes:
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- SCIENTIFIC
ATLANTA CODE 14
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- S-A CODE 14
SHUTDOWN
- (Also known
as Legal Terminal Test or LTT)
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- The legal
terminal test, hereafter referred to as
"LTT", is a command that can be issued from
the headend computer controller as often or
as rarely as desired. This test is sent along
the existing addressable information data
stream (FM band). Every Factory SA converter
connected to the system, including those
under control of a test kit, will respond to
this test.
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- When the
test command is received by the connected
factory SA converter it will execute an
instruction inside the main converter
microprocessor. This instruction will compare
certain market data programmed inside the
microprocessor against the market data
present on the data stream. If the
microprocessor data does not match the data
stream data, the converter will be instructed
to disable, and "nc" will appear on the
display.
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- If a
particular converter is under control of a
test kit, receiving and restoring power from
the converter will restore operation.
However, if the "LTT", is activated on a
frequent basis, removing and restoring power
will not be an acceptable
solution.
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- A factory SA
converter will NOT execute the "LTT" if the
command is NOT received from the addressable
data stream. Therefore, if the data receiver
inside a factory SA converter is
disconnected, the "LTT" instruction cannot be
received and executed by the converter. The
same is also true if the data stream is
blocked by installing two FM band traps in
series prior to the input terminal of the
converter. Band traps of this type are often
referred to as "Bullet Busters".
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- The data
receiver is a module inside every Factory SA
converter. This module always has a coax
cable running to it from near the input
connector. Do not confuse this with the
module that has a coax cable running to it
from near the output connector. If the coax
cable running from near the input connector
to the data receiver is cut or disconnected,
the converter will not receive any of the
data stream information. However, in addition
to blocking the "LTT" information, other
information, such as the system time and
channel mapping data (used primarily by 8580
models) will also be blocked.
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- Furthermore,
the converter itself tests internally for the
of the data stream every 72 hours. If the
data receiver is blocked or disconnected, the
internal test will fail and 'nc' will appear
on the display. Operation can be restored by
removing and restoring power (every three
days or so).
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- Summary: Not
all headends are capable of the 'LTT'. The
data stream should be left unblocked unless
problems are observed, in which case
installing the two FM band traps in series as
outlined above is the simplest remedy, with
the side effect of having to remove and
restore power when 'nc' appears on the
display (every three days or so).
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- for
educational use only
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