EXFO FLS-2200 Broadband Source - Manual (Page 96)

Technical Specifications
88 FLS-2200
15-minute and
8-hour power
stability (dB)

The 15-minute power stability expresses
the short-term power stability of the
source. It corresponds to the highest
power variation (Delta) measured over
15 minutes.

The 8-hour power stability expresses
the long-term power stability of the
source. It corresponds to the highest
power variation (Delta) measured over
8 hours. It gives an indication of the
referencing frequency needed.
Power stability is generally expressed as
± half the maximum power variation
observed (Delta/2).
Using a cooled Ge power meter set at the
central wavelength of the source, it is
possible to measure the difference between
the maximum and minimum power in any
consecutive 15-minute or 8-hour period
within a 12-hour moving observation
window. Each value, kept as a measured
power, is the instantaneous value sampled
at a frequency of 0.1 Hz.
The source total output power is adjusted at
0 dBm when the maximum total output
power of the source is greater than 0 dBm.
This ensures that the saturation effects of
the power meter do not affect power
measurements.
a Ge power meter set at
the source’s central
wavelength
Element Description Measured with...