>> q = quantizer; q.quantize(1.002973)
Warning: 1 overflow(s) occurred in the fi quantize operation.
> In embedded.quantizer/quantize (line 77)
You are exceeding the range of the quantizer.
You are providing more hex digits than fit into the quantizer.
A [16 15] quantizer is a total of 16 bits long.
I would suggest that you need
q = quantizer('mode', 'single');