HP 86037B, Instruction Manual

Page: 25 / 204

2-7
Operation
The Main Window
points, or steps, the greater the measurement accuracy. However, as the num-
ber of steps increases, so does the measurement time. It is important to select
enough steps to provide the required accuracy, but still allow for a timely mea-
surement. When measuring fiber, using 20 steps yields good results. The fol-
lowing table shows typical measurement times for 20 steps using three
different sensitivity settings.
Refer to “Sensitivity” on page 2-16 for informa-
tion on the sensitivity settings.
Ref
The
Ref
check box establishes a reference wavelength. The reference wave-
length is used to correct length drifts of the device under test during the mea-
surement and should be set when measuring fibers. It improves the accuracy
of the measurement, but increases measurement time.
Table 2-1. Example Measurement Times for 20 Measurement Steps
Sensitivity Measurement Time
Normal 2 minutes, 50 seconds
High 4 minutes, 30 seconds
Highest 10 minutes, 5 seconds