<FNC 3> what value is it?

Trying to pair a DS6878 via Bluetooth to a Win 7 PC. Scanner is in Master SPP mode, and I have to supply the address of the Bluetooth receiver in a Code128 barcode. So... what value do I encode for the FNC3 character? All attempts cause the scanner to blink red and issue the 3 error beeps. The example from the user's guide works fine, however (that is... green LED and single beep).