13
4.1.2 Secondary Search Phase
The basic pattern of the primary search is suspended
and the signal is followed to the buried subject.
•
Coarse Search:
From where the signal is first
detected to the approximate location of the
buried subject.
•
Pinpointing Phase:
Pinpointing occurs in the
immediate proximity of the buried subject using
the transceiver together with a probe pole.
4.2
Auto-Revert to SEND
Auto-revert to SEND automatically switches the
transceiver from the SEARCH mode to the SEND
mode if no user interaction or movement occurs dur-
ing a certain amount of time (default 8 minutes).
Prior to reverting, the device will sound an audible
alarm. Reverting can be avoided if either of the keys
is pressed within 20 seconds of the alarm.
This setting automatically reverts a transceiver, which
was unintentionally left in SEARCH mode (after a
search or an exercise), back to the SEND mode.
In case rescuers are buried in a second avalanche,
this function allows them to be located using trans-
ceivers.
4.3
Analog Search Tone
Just as in traditional analog transceivers, the analog
tone is just received by one antenna. The change in the
distance indication can therefore deviate from the
change in tone volume. Depending on the relative orien-
tation of the transmitter to the receiver, the tone volume
and the distance indication may both decrease while
approaching the buried subject.
4.4
Standard Mode
As soon as the device is switched to SEARCH, it is
operating in standard mode. This mode enormously
facilitates a rapid location
of a buried subject.
12
S E A R C H M o d e
4.1.1 Primary Search Phase
From the start of the search until you clearly hear the
first tone, you are in the primary search phase.
During the primary search, the avalanche surface is
searched systematically until you pick up a signal.
The objective of the primary search phase is to detect
a signal.
The PULSE Barryvox
®
uses the symbol
as a
generic instruction to apply one of the following
search patterns for new signals!
To optimize the range, rotate the transceiver
around all axes.
Once a signal is received, maintain the device orien-
tation and continue walking until the signal can be
heard clearly. The primary search phase is concluded.
Regardless of the operating mode, the following
search strategies apply:
Optimization of the range
Search strategy if the last seen point is unknown.
All distances in meters
Single rescuer
Multiple rescuers
50
Me
ter
s
Last seen point
Search strategy if the
last seen point is
known. The primary
search strip extends
downhill from the last
seen point in the direc-
tion of the slide.
