Cirris Signature 1000HN, Руководство пользователя

Страница: 72 / 86

Section 15: Glossary / intermittent
1000H+ User’s Guide / page 72
intermittent The 1000HN detects an intermittent fault when a cable is seen to develop shorts,
opens, or excessive resistance after it has already tested as good.
known-good cable
A known-good cable is a cable that you know is built correctly. We most often refer
to such a cable as a Sample Cable. You can program the 1000HN to test cables which
are supposed to be like the Sample Cable by letting the analyzer learn the Sample
Cable. When the list of interconnections and the other properties of a cable you are
testing are not the same as those of the Sample Cable, the signature of the cable you
are testing will not match the signature of the Sample Cable. This signature mismatch
will be reported as a “bad” cable.
last test setup The last wirelist (including all test parameters and adapter information) learned by the
analyzer. This can be loaded into the analyzer for testing either by learning a Sample
Cable, or by retrieving the wirelist information for a cable from the analyzer’s
memory.
memory location
The 1000HN has one “last learned” memory location, and as many as 50 “permanent”
memory locations. The number of available locations depends upon the size of the
wirelists being stored. Large wirelists take up more memory space than small ones do.
You can load cable information into the analyzer for testing by retrieving the informa-
tion from one of these memory locations. It is also possible to delete old wirelist
information from specific memory locations to free up memory for storing new cable
information.
microprocessor The electronic assembly which includes the LCD display. As you look at the analyzer
from above, the microprocessor assembly is located to the left.
miswire
A type of interconnection error where a one pin is incorrectly connected to another
pin. For example, if a connection is supposed to exist between pins 5 and 6, but actu-
ally exists between pins 5 and 7, the error will be reported as a miswire.
net Any group of pins which are connected together. The analyzer automatically assigns
a number to each group of interconnected pins (called nets). This number appears on
the left-hand side of printed documentation, and in the left-hand side of the analyzer’s
LCD display.
open
A kind of interconnection error where there is no continuity between two connector
pins which are supposed to be connected. A connection which the cable’s master
documentation says should exist, does not in fact exist in the cable.
parameter signature When it displays signatures, the analyzer displays a six-digit alphanumeric cable
signature followed by a hyphen. After the hyphen, the analyzer displays a five-digit
alphanumeric known as the parameter signature. The parameter signature represents
the various test options you have selected for your test setup. Two different kinds of
cables will always have different cable signatures; but they may have the same
parameter signature if the option settings for both types were identical.
pin
An electrical contact point within a connector. In this manual, the word “pin” is used
in place of terms such as “point,” “contact,” “socket,” “termination,” etc.