NR-2000 User Manual
7
PRINCIPLE OF OPERATION
NR-2000 detector represents a portable device that consists of antenna
system, probing signal transmitter and 2 receivers tuned to the double
& triple frequencies of the emitted signal.
Mono-harmonic probing signal emitted by transmitter is converted by
non-linear elements (industrial semi-conductor or corrosion
metaloxide-metal structure) to poly-harmonic one and re-radiated into
an ambient space.
The re-radiated 2-nd & 3-rd harmonic of the probing signal are received
and processed by above-mentioned receivers (see fig. 3).
The received signals levels are displayed by two bar-graph scales: ‘2’
(red) & ‘3’ (green) respectively.
Furthermore, at the same time tonal acoustic signal is reproduced by the
headphones. The tonal signal level corresponds to that of the received
electric signals.
Volume control is adjusted by (+ VOL -) buttons of the Control unit.
At that a corresponding bar-graph scale is switched over for sound level
indication for one sec.
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