The Tektronix SD26 is a dual-channel sampling head delivering 20 GHz equivalent bandwidth for high-speed signal acquisition and characterization. With 17.5 ps rise time and a maximum sample repetition rate of 200 kHz, it captures fast transient events across DC to 20 GHz with exceptional fidelity. The SD26 integrates with Tektronix 11800 and 11801 Series Digital Sampling Oscilloscopes, the SM-11 Multi-Channel Unit, and CSA 803 Series Communications Signal Analyzers, enabling precise measurements in high-speed data communications, optical design validation, electrical characterization, and signal integrity analysis.
Technical Specifications
Bandwidth & Speed
• Bandwidth: DC to 20 GHz typical
• Rise time: 17.5 ps (30 ps alternate specification)
• Sample repetition rate: 100 Hz minimum to 200 kHz maximum
Signal Handling
• Input impedance: 50 Ω ±0.5 Ω
• Maximum safe input voltage: ±3 V
• Maximum operating input: 1.6 Vp-p
• Maximum signal voltage: 1.0 Vp-p
• Displayed noise (unity response): 750 µV typical, 1.2 mV maximum
• Displayed noise (with smoothing): 350 µV typical, 550 µV maximum
Transient Response Accuracy (Post-Calibration at Operating Temperature)
• 0.5 Vp-p signals: ±5%
• 1.0 Vp-p (adjustable unity): capable
• 10 ns to 20 ps before step: ±3% or less, typical
• <300 ps after step: +10%, -5% or less, typical
• 300 ps to 5 ns after step: ±3% or less, typical
• 5 ns to 100 ns: ±1% or less, typical
• Elsewhere: ±0.5% or less, typical
– Key Features
• Dual-channel simultaneous acquisition
• 3.5 mm female connector interface
• 0°C to +50°C operating temperature range
• Line frequency: 48 to 440 Hz
• Maximum power consumption: 214 W
• Same acquisition capability as SD24 sampling head (without TDR step generation)
– Compatibility & Integration
The SD26 operates with Tektronix 11800 Series, 11801 Series, 11801A, 11801B, 11801C Digital Sampling Oscilloscopes, SM-11 Multi-Channel Unit, and CSA 803 Series Communications Signal Analyzers. Optional 2 meter sampling head extender cable and SMA accessory kit available.
