Ortovox zoom+ Instrucciones De Uso página 23

ADVANCED INSTRUCTIONS FOR USE
2. ORTOVOX SECTOR METHOD
1. SECTOR:
After the 1st victim is located and ex-
cavated by searchers, the victim's
avalanche transceiver is switched
off and the avalanche debris is
searched by sector.
2. SECTOR: Approach from the left.
3. SECTOR: Approach from the right.
4. SECTOR: Approach from below.
Signals that have already been
located can naturally appear
again! In such cases, the searcher
should concentrate on signals
that have not yet been marked in
the avalanche field.
CAUTION
2
EN 38
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3
4
ADVANCED INSTRUCTIONS FOR USE
SIGNAL OVERLAP –
SIGNAL SEPARATION
The transmission signals are mea-
sured and analyzed by the ZOOM+. If
several transmission signals are re-
ceived that are transmitting at the
same time (simultaneous transmis-
sion signal and simultaneous trans-
mission break), then a signal overlap
occurs. This situation is illustrated
without a direction arrow (e.g. "40m"
and "several transmission signals").
IMPORTANT INFORMATION AbOUT
SIGNAL SEPARATION:
The visual portrayal of the victim
situation and the signal separation
help you when searching for one or
especially several avalanche vic-
tims. However, we would like to in-
form you about important, physically
contingent aspects of searching for
victims: When accidents happen,
several persons are often buried and
transmit a signal at the same time.
In this case – depending on the
rhythm of the individual transmit-
ters – it is possible for two or even
more transmitters to transmit si-
multaneously over a long time. This
can lead to signal overlaps, particu-
larly with analogue devices with a
long pulse and digital devices that
transmit synchronized pulses. The
signals overlap and can no longer be
technically distinguished. The signal
from an individual transmitter can-
not be measured either by analogue
or digital means in such a phase.
This can last for up to 30 seconds
and longer in the worst cases. It is
necessary to wait until there is a sig-
nal break. This physical phenome-
non can be solved with the ZOOM+
using locating strategies:
Applying the ORTOVOX SECTORS
METHOD (page 38).
EN 39