Leica DIGICAT 100 Manuel De L'utilisateur page 36

The DIGISYSTEM and the DIGICAT
7.8
The difference
between Lines and
Sondes
Locating the DIGIMOUSE
It is important to understand the difference between the signal emitted by a line and that
emitted by a sonde (DIGIMOUSE).
A line emits a signal that is unsurprisingly linear, whereas a DIGIMOUSE emits a signal from
a single point. Put simply, if these signals could be seen, then that of a line would appear as
a long and large tube, that of a DIGIMOUSE as a giant donut (with the DIGIMOUSE located
through the hole!).

For ease of tracing a long service, locate the sonde and mark the position every
3 - 4 m / 10 -13 ft.
DIGICAT 100/200 34