70
Measurements Applications
Measuring Signal-to-Noise Ratios
Location of noise measurements
Automatic
interpolation
When the signal-to-noise “auto” function is selected, the Keysight 86120B first
determines the proximity of any adjacent signal. If the next closest signal is
≤
200
GHz (approximately 1.6 nm at 1550 nm) away from the signal of interest, then the
noise power is measured half way between the two channels and an equal distance
to the other side of the signal of interest. See points P
n1
and P
n2
in the following fig-
ure.
If the closest signal is more than 200 GHz from the signal of interest, or if there is no
other signals present, then the noise power is measured at 100 GHz on either side of
the signal of interest. The two measured noise power levels are then averaged to
estimate the noise power level at the signal wavelength. The noise power measure-
ments use linear interpolation to estimate the noise power level at the signal of inter-
est’s wavelength.
Automatic interpolation
Содержание 86120B
Страница 1: ...Keysight 86120B Multi Wavelength Meter User s Guide...
Страница 2: ......
Страница 3: ...1...
Страница 12: ...10 General Safety Considerations...
Страница 68: ...You can use the ABORT and CONT softkey to stop and restart a print job that is in progress...
Страница 100: ...98 Programming Monitoring the Instrument...
Страница 163: ...161 Programming Commands CALCulate1 Subsystem Query Response For normal update 34123 For fast update 4268...
Страница 231: ...229 Performance Tests Test 5 Amplitude Accuracy and Linearity...
Страница 232: ......
Страница 233: ...7 Definition of Terms 233 Specifications 235 General Safety Information 239 Specifications and Regulatory Information...
Страница 244: ...242 Specifications and Regulatory Information Product Overview...
Страница 250: ...248 Reference Menu Maps Display List by Power Menu Display List by WL Menu...
Страница 251: ...249 Reference Menu Maps Delta On Menu Delta Off Menu...
Страница 253: ...251 Reference Menu Maps System Print Menu...
Страница 254: ...252 Reference Menu Maps System Setup Menu...
Страница 272: ......