Operation Manual

SiteNet 450 Operation Manual 43
Technical Specifications A
1
Power consumption, as well as the permissible number of repeaters in a network, depends on the selected
wireless data rate and the broadcast information content and rate (that is, CMR vs. RTCM SC-104 Ver. 2.1
packets at 1 Hz). The 9600 bps wireless data rate is not available for units with 12.5 kHz channel spacing.
2
Broadcast frequency, transmit power, channel spacing, and antenna gain are regulated by countries-of-use.
These are unique on a per-country basis. The broadcast frequencies, channel spacing, and country-of-use
for the radio-modem must be specified at time of order. Contact you local Trimble representative for more
information.
Connector:
Type
Provides
Indicators
8-pin male Bendix
Power, 2 serial ports, CAN interface
Power and data LED
Radio-modem performance
Range:
Optimal
Typical
10 km (6 miles), line-of-sight
3–5km (2–3 miles)
Varies with terrain and operating conditions.
A repeater may be used to extend the range.
Radio link:
Frequency range
Channel spacing
Transmit power
Channels
Wireless data rates
Modes
Single 10 MHz band per unit
430–440 MHz, 440–450 MHz,
450–460 MHz, or 460–470 MHz
12.5 kHz or 25 kHz (only 440–450 MHz is
available in 12.5 kHz at this time)
0.5 W
Up to 20 (factory pre-set)
2
12.5 kHz channel, 4800, 8000 bps
25 kHz channel, 4800, 8000, 9600 bps
Base/Repeater/Rover
Table A.1 Technical information (continued)
Specification
SN450.book Page 43 Friday, October 5, 2001 5:01 PM