Gigahertz Solutions NFA 1000 Operating Manual page 8

There are two display modes for the frequency-LEDs:
"Simple/Steady": (= preset)
The red LED represents the strongest frequency , and the yellow LED the second
strongest. The green LEDs indicate the total frequency range in the current setting.
"Full Information/Volatile": This makes the LEDs rather unsteady/volatile. (To be
configured with NFAsoft)
The proportion of the respective frequency band in relation to the total signal is be-
ing displayed. These proportions are shown as follows
3.2 Audio Signal
The acoustic signal is always linked to the respective measured value and has a
„Geiger Counter" characteristic, i. e. an increasing signal intensity will in turn cause
an accelerated rattling sound.
If the "Mode"-switch is set to „
up and the 'Rec. >' button to turn the volume down (and finally: off), as long as no
grounding cable is connected to the instrument.
Please note: For extra-precise measurement requirements turn the acoustic signal
volume down or even switch it off completely.
2
In order to allow for less fluctuations in this mode an internal high pass filter is switched on. With NFAsoft it can
be configurated to 16.7 and 50 Hz. Experience has shown that the best combination for a freehand measure-
ment is a filter set to 16.7 Hz for magnetic fields and to 50 Hz for electric fields. Electric fields of the 16.7 Hz
railway line power frequency (in some European countries) are quite rare indoors and can still be evaluated in the
"band" mode. They can still be separately evaluated with NFAsoft.
3
To make it more ergonomic for the user, frequencies below the nominal display resolution (that is < 0.1 V/m or
< 1 nT) are not indicated by an LED-signal but will still be recorded down to the noise level. Hysteresis: 9/12%
resp. 45/50%.
350-027_NFA1000400-6-2_EN-von-susanne as of October 2011
2
RED = DOMINANT (> 50%)
YELLOW = MEDIUM (< 50%)
GREEN = SMALL (< 10%)
" , press the 'Mode >' button to turn the volume
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