SR540 Optical Chopper 光学斩波器 4 Hz to 3.7 kHz Chopping Frequencies Low Phase Jitter Single and Dual Beam Experiments Sum & difference Reference Outputs Bolt Clamp or Rod Mounting SR540 Optical Chopper Chop frequency 4 Hz to 400 Hz (5/6 slot blade) 400 Hz to 3.7 kHz (25/30 slot blade) Frequency stability 250 ppm/°C (typ.) Frequency drift <2 %, 100 Hz < f < 3700 Hz Phase jitter (rms) 0.2° (50 Hz to 400 Hz) 0.5° (400 Hz to 3.7 kHz) Frequency display 4-digit, 1 Hz resolution and accuracy Frequency control 10-turn pot with 3 ranges: 4 Hz to 40 Hz 40 Hz to 400 Hz 400 Hz to 3.7 kHz Input control voltage 0 to 10 VDC for 0 to ** of full scale. Control voltage overrides frequency dial. Reference modes ?inner, ?outer, 5 × ?outer, ?inner + ?outer, ?outer - ?inner Dimensions Controller: 7.7" × 1.8" × 5.1" (WHL) Chopper head: 2.8" × 2.1" × 1.0" (WHL) Blade diameter 4.04" ±0.002" Cable length 6 ft. Power 12 W, 100/120/220/240 VAC, 50/60 Hz Warranty One year parts and labor on defects in materials and workmanship, 90 days on motor. Power 10 W, 100/120/220/240 VAC, 50/60 Hz Warranty One year parts and labor on defects in materials and workmanship