Topcon GR-3 User Manual

GR-3 Configuration
GR-3 Operator’s Manual
3-8
Output power Select the transmission power
for the radio modem.
n/a
Link rate Select the data transmission rate for the radio link.
As opposed to a baud rate (the rate of data transfer through a
serial cable interface), the link rate is the amount of data
(measured in bits) the radio modem can transmit/receive over the
air in a specified time period (measured in seconds).
• 9600 (recommended) – repeats data packet 3 times; packets
are encoded to decrease the affects of interference. This
provides max. data security, but reduces data throughput.
• 12000 – repeats data packets 5 times; no encoding is applied.
• 17000 – repeats data packets 3 times; no encoding applied.
• 24000 – only uses encoding.
• 51000 – uses no repeating or encoding. This provides max.
data throughput, but reduces data communication reliability.
For maximum efficiency, the data packet size transferred to the
radio modem in a given time should be equal to or less than the
link rate. Use the following table to determine the link rate.
Data Packet
Size (in bits)
TX Serial Baud Rate Link Rate
RX Serial
Baud Rate
0–9600 9600; 19200
9600
a
; 12000
9600; 19200;
38400; 57600
9600–12000 19200; 38400
12000
a
;
24000
19200;
38400; 57600
12000–17000 19200; 38400
17000
a
;
24000
19200;
38400; 57600
17000–24000 38400; 57600 24000 38400; 57600
24000–51000 57600 51000 57600
Table 3-2. Receiver Parameters for the Radio Link Tab (Continued)
Parameter Base Receiver Rover Receiver

Topcon GR-3 Specifications

General

Brand	Topcon
Model	GR-3
Category	Receiver
Language	English