Sony VPLL-3024 Fixed Short Throw Lens (2.34:1 to 3.19:1) - Manual (Page 243)

Help Guide
Linear PCM Recorder
PCM-A10
You cannot make device registration (pairing) between the linear PCM recorder and
the other device.
Your linear PCM recorder and the other device are too apart from each other. Bring them closer (within 1 meter (3.3
feet) from each other) and try it once again.
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