Now, I am wondering whether the source value can have an absolute value
larger than 1. The documentation is a bit ambiguous as it contains the
note: 'XXX: set exact relative ref frame reference instead of a +/- 1
"direction"'. Looks like a Todo to me which would imply that currently
only values +1/-1 are used.
Any ideas on how I can force the encoder to produce some vectors with
absolute source values larger than 1? I want to test my algorithm to
ensure it won't brake once it encounters different source values.