Topcon AGA5495, Operator'S Manual

Page: 51 / 144

Chapter 5 – System Setup
33
Option Description
Baud Rate The data transmission rate for modems. Refer to
documentation supplied with modem.
GGA
Output Some network providers require a GGA (position) to be
sent to them to allow them to identify the location of the
rover (tractor).
NTRIP setup options
If DGPS NTRIP is selected, a wizard launches to detect the attached
modem.
l
GSM APN
: The telecommunication provider's internet link.
l
GSM MTU
(Maximum Transmission Units): The largest protocol
data unit that can be passed onwards.
l
Cell roaming
: This may be used to disable cell roaming to prevent
accidental cross-border data charges (useful if working near the
border of another country).
l
NTRIP Mount point : The ID of the base station (either real or
virtual).
The GSM and CELL ROAMING settings can be obtained from your
cellular network provider. The remaining settings are provided by your
NTRIP service provider.
RTK setup options
If RTK is selected, a wizard launches to detect the attached modem.
l
Frequency : The frequency used.
l
Channel spacing : The frequency difference between adjacent
allocations in a frequency plan.
l
Net ID : The setting for scrambling (1-255 = on, 0 = off).
l
Link protocol : Radio data transmission protocol.
l
Modulation : The type of modulation used.
l
FEC (Forward Error Correction): A technique used for controlling
errors in data transmission over unreliable or noisy communication
channels.