HW V4 / © 2005 – 2013 Aaronia AG, DE-54597 Strickscheid
26
Manual Spectran V4
Functional description
5.3.11.1. Demod
(GSM-Decoder)
With GSM you can activate a powerful GSM-Decoder mode.
In this mode the spectrum display will be deactivated.
Instead you will see continues decoded GSM data stream.
The following symbols are used:
„*“ =
Signal can’t be decoded (signal is to weak or bad
signal
„F“ = found FCCH
„S“ = found Sync
„0-7“ = represent the color code or TSC
(Training Sequence) number.
As demodulation is performed in almost real-time, it is
especially suitable for very quick location and assessment of
signal sources.
5.3.12. AudInd
(Audio-Indicator / “bug tracer” –
option 015)
The AudInd feature allows quick audio-aided location of
signal sources (especially “bugs” or “wiretaps”). In this
mode, a tone is being emitted whose strength and duration
is proportional to the detected signal strength.
Note
: The tone changes only after each sweep completes an corresponds to the
highest level detected. So, to sensibly utilize this feature, a very fast sweep is
needed. For optimum results, this feature should be used in conjunction with a fast
zero-span sweep (Span=0Hz) or using the Power-Meter mode (Option 20x). For best
results always use a very short sweep time of 1mS.
“OFF” turns off audio reproduction, “MaxAmp” enables it.
Tip
: The signal-dynamic can be changed at any time by changing the Reference Level. The
tone changes only after each sweep completes and corresponds to the highest level dete
