SonTek RS5 User Manual (August 2020) 29
Figure 4. RS5 Max and RTK GNSS Components
3.3.3 GNSS Unlock Code (for externally-supplied GNSS antenna)
For users who prefer to use their own GNSS antenna systems, a GPS unlock code can
be purchased through SonTek (please contact
code is specific to each RS5 unit. Users will need to ensure that their GNSS antenna of
choice can support the output specifications required by the RS5 (outlined in 5.2.2). A
cable diagram can be provided and users will need to fabricate a cable appropriate
between the RS5 and their antenna. For detailed instructions on how to enable your
external GNSS antenna using the unlock code, please refer to Appendix D.
3.4. SonTek Hydroboard II-Micro
The RS5 system comes standard as a package with the SonTek Hydroboard II – Micro,
the floating platform designed specifically for the purpose of taking discharge
measurements using the RS5.