Atec Anritsu_MS9720A - Manual (Page 3)

3
58 dB Dynamic Range
The measurement dynamic range at the wavelength 1 nm
from the peak is 58 dB demonstrating the tester’s power
when measuring the SNR of light sources in WDM systems
and when evaluating filters, etc. The following screens show
the dynamic range at 1 and 0.5 nm from the peak.
– 87 dBm Optical Reception Sensitivity
The MS9720A noise level is –87 dBm, so the tester is ideal
for measuring the SNR of light sources used in WDM sys-
tems, as well as optical leakage and reflected light. The fol-
lowing screen shows a measurement of an optical spectrum
of a DFB LD with the output level attenuated to –85 dBm at
a VBW of 10 Hz.
The SNR is improved by using averaging processing. The
following is an example of measurement result after 10
sweep averaging are performed.
Dynamic range
58 dB (1 nm from peak)
53 dB (0.5 nm from peak)