Spectra Precision Survey Pro v4.6 Recon and Nomad User Manual - Manual (Page 329)

GPS Module
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5. If connecting to a GPS receiver or a total station,
enter the Bluetooth passkey if there is one or leave
the field blank if no passkey is required and then tap
Next and skip to Step 7.
If connecting to a cellular phone, enter any passkey
that is 3 characters or longer and then tap Next and
continue to the next step.
6. Look at the cell phone. It will ask if you want to add
the data collector to your devices. Answer [Yes] and
then enter the same passkey using the cell phone's
keypad.
7. Enter a display name for the new device or use the
default name. If services are listed, select Serial Port
if connecting to a total station or GPS receiver, or
select Dialup Networking if connecting to a cell phone
and then tap Finish .
8. Repeat the above steps to add any other Bluetooth
device that you want to use with Survey Pro.
9. Tap > Survey Pro to return to Survey Pro.