CertiFiber will store a separate reference value
for each wavelength.
The new reference value will be subtracted
from the actual measured value to determine
loss.
CertiFiber will store reference data for up to
five CertiFiber Remote units and one loopback
setup (see the next section).
NOTE
To ensure consistently accurate measurements, the
reference value must be set each calendar day that
CertiFiber is used. The reference value expires each
day at midnight.
4.1.2 I
N
L
OOPBACK
M
ODE
If a single cable needs to be measured, the
reference value can be set for a single launch
cable. To do so, take these steps:
1. Attach one end of the cable
to the CertiFiber main
unit’s TX1 connector, and
the other end to the RX2
connector, as shown at
right.
2. Use a coupler to connect
the Launch cables.
3. Press Shift + Autotest to
record the reference value.
4. Remove the coupler without disturbing
the connection to the CertiFiber.
36
CERTIFIBER™
Coupler
RX2 TX1
RX2 TX1
RX2 TX1
1 m Launch Cable
