Tektronix CSA8000B Manual do Utilizador descarregar pdf (Página 282)

Appendix B: Automatic Measurements Reference

B-20

CSA8000B & TDS8000B User Manual

Table B- 4: RZ Measurements - Amplitude (cont.)

Name Definition

RZ High The logical 1 level of the RZ signal. The data within the Eye Aperture is sampled, a histogram is

built from the upper half of the RZ eye, and the mean of the histogram yields the High level.

The Eye Aperture is adj ustable and defaults to 5% of the RZ pulse width. See RZ Eye Aperture

Parameters on B--62.

If enabled, measurement gates constrain the measurement region to the area between the Start

Gate (G1) and Stop Gate (G2). See To Localize a M easurem ent on page 3--83.

This measurement requires the use of a waveform database. When this measurement is turned

on, it will automat ically set the measurement system to use a waveform database if available.

See Use a Waveform Database on page B--70.

For best result s with t his measurement:

H Perform a Dark Level compensati on before taki ng this m easurement if the source of the

measured waveform is an optical channel. See To Perform Dark-Level and User

Wavelength Gain Compensations on page 3--98.

H Optimize the vertical resolution before taking this measurement. See How to Optimize the

Vertical Resolution on page B--70.

RZ Low The logical 0 level of the RZ signal . T he data within the Eye Aperture is sampled, a histogram is

built from the lower half of the RZ eye, and the mean of the histogram yields the Low level.

The Eye Aperture is adj ustable and defaults to 5% of the RZ pulse width.

If enabled, measurement gates constrain the measurement region to the area between the Start

Gate (G1) and Stop Gate (G2).

This measurement requires the use of a waveform database. When this measurement is turned

on, it will automat ically set the measurement system to use a waveform database if available.

For best result s with t his measurement:

H Perform a Dark Level compensati on before taki ng this m easurement if the source of the

measured waveform is an optical channel. See To Perform Dark-Level and User

Wavelength Gain Compensations on page 3--98.

H Optimize the vertical resolution before taking this measurement. See To Optimize the

Vertical Resolution on page B--69.

1 2 ... 277 278 279 280 281 282 283 284 285 286 287 ... 353 354

Sem comentários

Tektronix CSA8000B Manual do Utilizador Página 282