Tektronix TekRanger 2 TFS3031, Руководство по обслуживанию, Страница: 219 / 272

Performance Check – TekRanger 2 (serial nos. B052000 and above)
4–58
TFS3031 TekRanger/TekRanger 2 Service Manual
16. Position the active cursor on the rising edge of the pulse of the magnified
event.
Figure 4–34: Multimode Attenuation Dead Zone
17. The Cursor A–B reading at the top of the screen is the attenuation dead zone.
18. Verify that the attenuation dead-zone measurement is equal to or less than
the specifications for the wavelength and pulse width being tested.
19. Position cursor A at the peak of the reflection.
20. Press
Cursor A/Cursor B
to select cursor B, and move it to a point on the
falling edge of the reflection at least 0.3 dB down from cursor A.