Tektronix CSA8000B Manual do Utilizador descarregar pdf (Página 173)

100

101

Measuring Waveforms

CSA8000B & TDS8000B User Manual

3-99

Overview Control el ements and resourcesTo perform optical com pensati ons (cont.)

Run the dark-

level comp ensa-

tion

4. In Vert Setup dialog box, click the Dark Level button

under Compensation. See right. Follow the instructions

on screen.

5. Repeat steps 2 and 4 for any additional optical channels

you want to compensate.

Run the user

wavelength g ain

compensation

If you want, you can can compensate an optical channel for

a custom input signal:

6. In Vert Setup dialog box, click the User Wavelength

Gain butt on under Compensati on. See right. Follow the

instructions on screen.

7. In the User Wavelengt h Gain Com pensation dialog box,

set the wavelengt h and power of the signal to be

applied to t he channel. See right.

H User should have an optical signal at tached t o

module input with a precisely known amount of

optical power. An independently-calibrated average

optical power meter is used to measure this power

precisely. Then signal is connected to the 80C0X

with the same fiber cables.

8. Press t he OK button to execute the compensation.

9. Repeat steps 2, 6, and 7 for any additional optical

channels you want to com pensate.

End of Procedure

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