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Software Manual for the R&S ZVL-K1 - Rohde & Schwarz

Software Manual for the R&S ZVL-K1 - Rohde & Schwarz

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R&S <strong>ZVL</strong>-<strong>K1</strong> Cable TV Measurements (Option K20)<br />

The spectrum of <strong>the</strong> input signal is displayed.<br />

Fig. 2-52 Digital TV Spectrum measurement<br />

Overview measurement<br />

This measurement determines <strong>the</strong> modulation accuracy of a digitally modulated single carrier QAM<br />

signals. The measurement results are checked against <strong>the</strong> limits and displayed in a table. In this table,<br />

only <strong>the</strong> important result parameters of digital TV signals are displayed. Less important result<br />

parameters are provided by <strong>the</strong> Modulation Errors measurement (modulation analysis).<br />

Result parameters that failed <strong>the</strong> check are displayed in red and bold characters, <strong>the</strong> table cell is<br />

marked with a star. Result parameters that passed <strong>the</strong> checks are displayed in green characters. A<br />

global pass or fail comment is displayed in <strong>the</strong> upper left table corner on a green (<strong>for</strong> passed) or red (<strong>for</strong><br />

failed) background.<br />

Table 2–7: Result parameters – Overview<br />

Parameter Description Definition<br />

MER (rms) root mean square of modulation<br />

error rate<br />

MER (peak) peak of modulation error rate<br />

1303.6573.42 2.71 E-5

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