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Tektronix SD48 () Main Features and Specifications

Product Specs

  • Status Discontinued

The SD48 is an optical-to-electrical (O/E) converter that converts an optical input signal into an output voltage for display on either a high-speed oscilloscope or spectrum analyzer. The SD-48 O/E converter installs in any of the front panel compartments of a Tektronix 11800 Series Digital Sampling Oscilloscope, the SM-11 Multichannel Unit, or the Tektronix CSA 803 Communications Signal Analyzer. An optional stand-alone power supply is also available for the SD-48 O/E converter. The SD-48 O/E converter has an FC/PC receptacle for optical signal input and a precision 2.92 mm K‑connector for electrical signal output.

  • 1000 to 1650 nm wavelength response
  • DC to 30 GHz typical transducer bandwidth
  • Absolute maximum nondestructive optical input: 10 mW average power; 20 mW peak power at wavelength with highest relative responsivity 
  • ≥15 mV/mW of DC conversion gain at 1310 and 1550 nm
  • Sampling heads that can connect to the output of the O/E converter:
    • SD22 (recommended for lowest noise performance)
    • SD24
    • SD26
    • SD30
    • SD32 (requires a V-K adapter and rigid J-cable)
  • Input fiber diameter: Accepts 9 µm single-mode 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 minimum when external mating fiber is also single-mode PC style
  • Noise equivalent power: ≤15 pW/√Hz electrical output noise when terminated into 50 Ω
  • Impulse response width, typical: ≤15 ps FWHM (Full Width Half Maximum)
  • Aberrations, typical: ≤20%p-p total
  • Output zero: ≤1 mV
  • External termination impedance: 50 Ω ± 2 Ω