SEPTENTRIO ALTUS NR3, Руководство пользователя

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APPENDIX C. POINT-TO-POINT CONNECTIONS
C Point-to-Point connections
Two Altus NR3 units con fi gured as a Base station and rover, can be connected to each other
in order to transfer differential corrections over the connections listed in the Table below.
Connection Cost
Range and
availability Number
of rovers
Additional information
Data call
set by
provider
Limited to GSM
network
availability
1
The initial connection can be slow ( ∼ 30s), GSM availability is
however usually better than mobile internet. In some
countries, CDMA is more prevalent that GSM.
NB:
Accepting or initiating a data call will cause a peak in the
current drawn from the batteries. For this reason, a data call
connection requires both batteries to be present with at least
a total charge (for both batteries) of about 40%. Note that
the Data Call feature cannot be used when the Altus NR3 is
connected to an external power supply without batteries on
the unit.
Mobile
internet set by
provider
Limited to
3G/4G
availability
8
It is Advisable to use register with a Dynamic DNS service
1
or
use a fi xed IP address
2
WiFi Free
up to ∼ 180 m
(depending on
environment) 4
The Base station unit should be setup as an Access Point and
rover receivers as WiFi Clients
1
Section 6.4 describes how to make use of Dynamic DNS
2
Note that some service providers do not support use of a
fi
xed IP
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