5.7
Audio output
mode (demodulator)
(the DISPLAY MODE status field displays “AM” or “FM”)
All SPECTRAN models offer a so-called
demodulator
.
This demodulator turns pulsings and modulation of signal
sources into
tones
.
Frequency-accurate and selective acoustic representati-
on of a signal can be helpful with identification and locati-
on of a signal source. As demodulation occurs in realtime,
it is suited perfectly to find the signal source very quickly.
SPECTRAN offers two different demodulation modes:
AM
(amplitude modulation “AM”)
FM
(frequency modulation “FM”).
You can switch between the demodulation modes by
pressing the dot key
(the DISPLAY MODE status field
displays “ “AM” or “FM”).
You can adjust the volume by turning the volume knob on
the left side.
ATTENTION: During audio analysis, the entire display
will be “frozen“ and the pixel field is turned off com-
pletely to save computing power for demodulation.
Then ONLY acoustic reproduction of the signal is car-
ried out!
In contrast to simple broadband detectors, SPECTRAN
performs its demodulation only at a specific frequency (center frequency). Thus,
you can selectively „listen“ small individual frequency ranges. However, please
note that filtering in this mode is slightly less stringent. As a result, strong signals
on neighbouring frequencies might “bleed“ onto the actual selected frequency
and be audible as well.
For optimal audio reproduction of signals, you can choose between several fil-
ter bandwidths by using the
up/down arrow keys
. The currently selected filter
will be shown in the large INFO display.
Disp
lay i
s ”fr
ozen
“
Pixe
l dis
play
is tu
rned
off
5.0 Your first measurement / Modes
Firmware V 1.0 / © 2005-2013 by Aaronia AG, D-54597 Euscheid, www.aaronia.com
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