Gigahertz Solutions NFA 30M Operating Manual page 6

Made in Germany
logs measurement values from 1 to 30,000 µW/m²; the dis-
2
play shows mV.
For logging high frequencies please make sure to remember
the settings of the connected HF-Analyser, as they will not
be registered by the NFA.
4.4 Evaluation of Signal
tRMS = "true Root Mean Square". The values
Signal
displayed and recorded can be compared
directly to classifications recommended by
tRMS
building biologists.
Hold
This is the correct standard setting of the
Peak
NFA, even for logging the peak values of a
connected HF-Analyser.
Peak = Real peak value measurement: With this setting the
meter measures the highest culminating point of the wave
A new, still experimental measurement feature for building
biologists which allows for a more detailed analysis of the LF
world in a way which has long since been considered essen-
tial in the analysis of high frequencies. This option supplies
important information for the evaluation of "Dirty Power".
Hold = Hold maximum value ("Max hold"). Retains "tRMS"
or "Peak" of the signal, depending on the switch position
from which "Hold" was chosen. When setting the signal
switch to "Hold", the reading on the display will be held, but
the value recorded on the SD-card will still be the real time
value.
4.5 SD Memory Card
This is the slot for the SD card. Insert until it
snaps (use fingernail or pencil, if necessary).
To withdraw, press again to undo the snap
mechanism.
The high-speed SD memory card (4 GB,
SDHC) supplied with the instrument contains the current
version of the NFAsoft software and enough memory for
several 36h recordings. Important: Please make sure to only
2
For all measurement ranges, even when using an attenuator or amplifier, NFA-
soft offers a comfortable conversion tool. The random noise will make it impos-
sible to properly display or record measurement values below 0.1µW/m², though.
3
The resolution of the frequencies during the analysis of the (actually by their
nature broad banded) peak values does not take into account phase information,
so it's practically a worst-case consideration. Tolerances are much higher than
when using the tRMS analysis.
January 2018
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© Gigahertz Solutions GmbH
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