6 Measurements with the NBM-550 and EHP-50
76 NBM-550 Narda
means that 1 s will be displayed even if an interval time of
10 s is necessary, for example. The table below shows the
relationship between span and timer interval:
Generally the measurement time or refresh rate for the
result display in LF mode depends on the selected span.
Note: Timer logging results obtained in LF mode can be
subsequently averaged using the optionally available NBM-
TS PC software. RMS/MEAN and MEDIAN post average
evaluations are available.
Note: Since uninterrupted measurement is not possible in LF
mode (except for WPM), the measurement results are not
summarized into Min/Max/Avg values for each
measurement interval. The Actual values are recorded once
every interval instead.
Span Timer interval
100 Hz ≥ 10 s
200 Hz ≥ 5s
500 Hz ≥ 2s
> 500 Hz ≥ 1s
Span Measuring time
100 Hz approx. 4 s
200 Hz approx. 2 s
> 500 Hz approx. 1 s
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