Fig. 4From: Bidirectional MM-Wave Radio over Fiber transmission through frequency dual 16-tupling of RF local oscillatorSpectra after various test locations (a) Downstream data modulation on +4th and +20th order sidebands from CS to BS1 (b) Downstream data modulation on −4th and −20th order sidebands from CS at BS2 (c) Upstream data modulation on +12th order sideband from BS1 to CS (d)) Upstream data modulation on −12th order sideband from BS1to CSBack to article page