Operation Manual

SiteNet 450 Operation Manual 17
Installing the SiteNet 450 Network 3
with the base and each other. The operation of the repeaters is
transparent to the rovers. The rover will use the data packets from the
base or repeater, whichever it receives first.
The option to include a repeater in a network depends on the selected
wireless data rate and the broadcast information content. Table 3.1
illustrates when a repeater may be used in a network for various
wireless data rates, RTK formats, and RTK epoch rate.
3.2 Physical Description
The SiteNet 450 radio-modem is encased in a rugged, waterproof
metal case. It has an antenna mount on the top cap, and a connector
and LED on the bottom cap. The physical aspects of SiteNet 450
hardware are outlined below, followed by details covering interface
connections and antenna installations.
Table 3.1 Repeater use in networks
Wireless data
rate (bps)
DGPS
CMR
at 1 Hz
RTCM 2.x at
1 Hz
4800 1 1 0
9600 2 2 1
2 - Two repeaters may be used
1 - One repeater may be used
0 - No repeaters may be used
SN450.book Page 17 Friday, October 5, 2001 5:01 PM