AUTOTEST TWO-WAY OPERATION
KI23400/KI27400 UM-2
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Autotest Two-Way Operation
This is the typical method of operation with a matched pair of Two-
Way instruments, and for Tier 1 testing. It is possibly the easiest
possible way to operate any loss test set, and quickly produces a
comprehensive set of accurate test results.
Two-Way Autotest performs a bidirectional test of one connected fiber
at a time, in a single hook-up. This is much easier and more accurate
than many other instruments that require two fibers to be connected
in a sequence of operations. The test can include loss, ORL and length
depending on instrument options.
This method works when connected between the Two-Way Ports on
a pair of instruments. The Two-Way test port is bidirectional, and can
include a light source, power meter, length test and ORL meter.
To get started: Use one or more appropriate test reference leads to
connect a Two-Way test port on
both
instruments, turn on both
instruments, then on one of them, press [Auto] to initiate Autotest. Do
not
connector to a power meter port!
A few seconds after initiating Autotest, both instruments will
continuously cycle through available
λ
and both will show the same
test results: Length, loss & ORL for up to three
λ
display at the same
time. To indicate Autotest is on; ’Auto’ will be flashing.
See Figure 1 at
the end of this section for a sample LCD display.
Light sources with
up to 3 active λ (excluding VisiTester) per source
port will by default cycle through all available λ, unless a
reduced/restricted
λ
-set has been selected, which can help speed up
& simplify higher volume testing.
The instrument’s large LCD is particularly
good in this mode, since it
shows a wide range of test information with no user intervention.
Depending on the instrument model number, various
λ
, ORL and
length measurement may be included in the displayed test results.
To exit Autotest, press [Home] or disconnect a patch lead for more
than 8 seconds, on any of the connected instruments.
Two-Way Referencing
Referencing can be done in two different ways. The best method will
depend on the practical situation and accuracy requirement.
1.
Most accurate method: If it is practical to connect and reference
a pair of instruments: connect a test reference lead between the
Two-way ports of the two instruments, enter Autotest mode, and
set the reference.
2.
Less accurate method, suitable for remote operation: Remotely
reference each meter by looping the Two-Way port round to the
on-board power meter. In this case: on each instrument, connect
a patch lead from the two-way port to the power meter port, enter
Autotest mode, and set the reference.
