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GRX1 Chapter 1
Option Authorization File (OAF)
Sokkia Topcon issues an Option Authorization File ( OAF ) to enable the specific options that
customers purchase. An Option Authorization File allows customers to customize and
configure the receiver according to particular needs, thus only purchasing those options
needed.
Typically, all receivers ship with a temporary OAF that allows it to be used for a predetermined
period of time. When the receiver is purchased, a new OAF permanently activates purchased
options. Receiver options remain intact when clearing the NVRAM or resetting the receiver.
The OAF enables the following kinds of functions. For a complete list of available options and
details, visit the Sokkia Topcon website or consult a Sokkia Topcon dealer.
Type of signal ( standard L1; optional L2, L5 GPS, GLONASS )
Update rate standard 1Hz ( optional 5, 10, or 20Hz )
RTK at 1Hz, 5Hz, 10Hz, and 20Hz
RTCM/CMRInput/Output
Advanced multipath reduction
Wide Area Augmentation System ( WAAS )
Receiver Autonomous Integrity Monitoring ( RAIM )
GRX1 Chapter 1