Agilent Technologies 86038B User Manual page 335

Conditions: Measurement settings and operation mode as
specified.
Measurement: The measurement uncertainty of GD and
relative GD results from
1.frequency uncertainty of the PDLA output modulator (as
specified for the network analyzer)
2.phase shift measurement error of the modulated signal at the
PDLA receiver between test device measurement and
normalization measurement
Part 2 (phase shift measurement error) is determined by
measuring the rGD of a stable 2 m SMF patchcord with different
modulation frequencies from 1.90 GHz to 2.00 GHz with 0.02
GHz steps. The relative GD uncertainty is twice the standard
deviation of the measured rGD values at each wavelength.
Reference wavelength is the middle of the measured wavelength
range.
Relative wavelength uncertainty
When calculating the difference between measured and actual
wavelength over a specified wavelength range, the relative
wavelength uncertainty is half the span between maximum and
minimum of all differences. Wavelength is defined as
wavelength in vacuum.
Conditions:
"Swept mode (continuous sweep mode)" or
"Stepped mode" as specified. Other conditions as specified.
Second order PMD
The second-order PMD, S, quantifies the magnitude of the
differential change of the "Polarization mode dispersion (PMD)"
vector, ƒ , with rotational frequency change, , expressed in
2
[ps ],
S=| / |
Note: Second-order PMD is expressed in [ps/nm] at 1550 nm by
multiplying the [ps2] value with the factor 0.784 nm/ps.
Specified temperature
The temperature range where the specifications apply (if not
differently stated).
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Agilent 86038B Photonic Dispersion and Loss Analyzer, Second Edition