Producing an eye pattern with electronic eye-crossing control from 40% to 70%, Narda Microwave-East’s FO-MDA-40-25G-1 lithium niobate modulator driver serves 300-pin MSA transponders employed in DPSK long-reach 40-Gb/s lightwave communication systems. The 1.10” × 1.10” × 0.34” device demonstrates a 3-dB bandwidth from 85 kHz to 40 GHz, gain of 29 dB, input and output return loss of 12 dB, rms additive jitter of 550 ps, rise and fall times (20% to 80%) of 10 ps, and a max. data rate of 43 Gb/s. The component offers output power up to 8 Vpp with an input voltage of 450 mVpp; variable amplitude from 0.50 Vpp to 8 Vpp, and 3.30-VDC and 5-VDC power requirements. The driver operates from 0ºC to 70ºC with GPPO connectors.