HP 86037B, Instruction Manual

Page: 35 / 204

2-17
Operation
The Main Window
Copy Normalization wavelengths to Test wavelengths
Use this selection to copy the calibration wavelength limits to the wavelengths
used for the measurement. If the values are identical, this feature eliminates
the need to enter the wavelength limits twice.
Length Meas command
HP Defaults
This button sets the dialog box
to its default settings.
TLS Wavelength and TLS
Target Power
Edit these fields to set the
wavelength and power level of
the tunable laser source. If the specified power level is too high for the tunable
laser source, the tunable laser source supplies as much as is possible.
Average Factor
Increasing the average factor reduces noise when measuring length. Because
this factor controls the number of network analyzer sweeps which are aver-
aged to at each wavelength point, measurement time increases in proportion
to averaging factor. Noise is reduced by the reciprocal of the square root of the
averaging factor.
Sensitivity
You can select from Normal , High, and Highest settings. Increasing sensitivity
reduces noise but increases the measurement time. The sensitivity setting
configures the IF bandwidth used by the network analyzer.
Normal , High, and
Highest correspond to 300, 100, and 30 Hz, respectively.
Table 2-3. Example Measurement Times for 20 Measurement Steps
Test Measurement Time
CD measurement only 2 minutes, 50 seconds
CD and Gain measurement 3 minutes, 46 seconds