Tektronix 11A32 Differential Comparator

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The 11A32 amplifier offers switchable 1MΩ/50Ω input impedance, fast overdrive recovery and wide offset ranges. Two built-in four-pole bandwidth-limit filters (100 MHz and 20 MHz) may be activated to reduce unwanted high-frequency noise at 24 dB/octave for each channel.
 

Both coarse and fine deflection-factor setups are fully calibrated. At 1mV/div, the calibrated DC offset can be set with a resolution of 25 µV and a range of ±1 V(equivalent to 16 bits), giving an effective screen height of 2000 divisions and permitting absolute DC measurement accuracies to ±0.4%.