Microtest OMNIScanner LT Specifikace stáhnout pdf (Strana 85)

CHAPTER 5: Measurements

Press ESC to exit the ATTENUATION screen.

NOTE

Attenuation always reports the worst dB value regardless of the Report:

setting in the RUN OPTIONS screen.

5.3.5 R

ETURN

OSS

The Return Loss function measures the uniformity of a cable’s impedance.

OMNIScanner injects a signal into the cable and measures the reflected signal

strength. Return Loss measures the difference between the transmitted signal

delivered to the cable and the reflected signal at the input port of the cable. The

reflected signal is the result of impedance mismatches in the link under test.

In the RETURN LOSS screen, the worst case margin for all near end and far

pairs is shown at the top of the screen.

The pairs are displayed in the column on the left side, followed by the Return

Loss in decibels (dB), the Return Loss margin/limit, and the frequency. The result

for each pair is tagged with a PASS or FAIL indicator.

1 2 ... 80 81 82 83 84 85 86 87 88 89 90 ... 152 153

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Microtest OMNIScanner LT Specifikace Strana 85