Manual SPECTRAN V5
© Aaronia AG 2016 | www.aaronia.com
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FUNCTIONS
4.2.10. Demod
(Demodulator/Audio-Analysis) Only in Real Time Mode!
The demodulator makes pulsing & modulations up to 10 kHz
audible and allows for „eavesdropping“ of individual signal
sources (such as radio stations, two-way radios, etc.).
4 types of modulation are available:
AM (amplitude modulation)
FM (frequency modulation)
PM (phase modulation)
IQ data (only available via the PC software)
CAUTION: When the demodulator is enabled the internal fan
is switched off which means that the device will slowly heat
up. Therefore, turn off the demodulator to activate the fan
again and to cool the unit down.
„OFF“ turns off the demodulator and turns on the fan again.
After the activation, you will automatically get to the spectrum
display, where a thin red dashed cursor will be displayed. At
exactly this point, the signal will be demodulated. You can
move the cursor back and forth with the jog dial anywhere in
the spectrum. That way you can approach individual signals,
for example radio stations, and make them audible.
For large RTBWs starting from 44MHz, you must change the
symbol processing to „Time“ in the JTFA menu, otherwise
there will not be enough data supplied for a demodulation!
The demodulation bandwidth can be set in the menu item
„Demod BW“.
Tip
: Since the demodulation is performed in quasi „real time“, it is also suitable for
the rapid detection of a signal source.
