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Tektronix SD44 () Main Features and Specifications

Product Specs

  • Status Discontinued

The SD44 is an optical-to-electrical (O/E) converter for use with the Tektronix CSA803 and 11800 Series sampling oscilloscopes equipped with an SD2x or SD3x Electrical Sampling Head. The SD44 Optical-to-electrical Converter can be plugged directly into a 11800 sampling slot, CSA803 power slot, or attached via a sampling head extender cable for remote use. The head extenders come in either 1 meter (012-1220-00) or 2 meter (012-1221-00) options.

Optical signal input on the SD44 is a standard FC/PC fiber optic connector. Other connector types can be accommodated by using hybrid fiber optic jumper cables (SA/SD42) or an assortment of hybrid mating adapters (SD44).

  • Effective wavelength range, typical: 1000 nm to 1650 nm
  • DC conversion gain: ≥35 mV/mW at 1310 nm ± 20 nm and 1550 nm ± 20 nm
  • Absolute maximum nondestructive optical input: 5 mW average power; 10 mW peak power at wavelength with highest relative responsivity
  • Bandwidth: DC to 15 GHz (≥–6 dB electrical power into 50 Ω) for signals <2 mWp-p
  • Sampling heads that connect to the output of the O/E converter
    • SD22 (recommended for lowest noise performance)
    • SD24
    • SD26
    • SD30
    • SD32
  • Input fiber diameter: Accepts 9 µm singlemode diameter; Numerical Aperture (NA) ≤0.20
  • Internal fiber diameter: core: 9 µm single-mode fiber, cladding: 125 µm
  • Fiber connector style: female FC/PC
  • Optical return loss: >30 dB typical, >28 dB minimum when external mating fiber is also PC style
  • Noise equivalent power: ≤15 pW/√Hz electrical output noise when terminated into 50 Ω
  • Impulse response width: ≤30 ps FWHM (Full Width Half Maximum)
  • Aberrations: ≤10%p-p total
  • Output zero: ≤1 mV
  • External termination impedance: 50 Ω ± 2 Ω