Agilent Technologies Agilent 86120C manual Measuring flatness, To measure flatness

Making Measurements

Measuring Laser Separation

Measuring flatness

You can use relative power measurements to measure flatness (pre- emphasis) in a WDM system. Simply select one carrier as the reference and measure the remaining carriers relative to the reference level. The power differences represent the system flatness.

Press RESET to turn off the delta calculations so that all responses are shown in absolute wavelength and powers.

To measure flatness

1Press the front- panel Preset key.

2Press List by Power.

This lists the input signals by power with the largest response listed first.

3Press the Delta On key.

4Select ∆ PWR.

5Use the and softkeys to select the first laser line.

6Press SELECT.

7Since the largest power signal is the reference, the relative power measurements for the other responses shows system flatness.

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