S-6

Template:Plugin Sidebar 2 The Tektronix S-6 Sampling Head plug-in is a 50 Ω feed-through unit with a rise-time of 30 ps and bandwidth of 11.5 GHz. It was introduced in 1971. The S-6 provides two unterminated 50 Ω SMA connections in a loop-through configuration as is convenient for TDR applications.

It is good practice to leave a termination resistor on the unit when unused to give some protection against electrostatic discharge.

Key Specifications

Rise time	30 ps
Bandwidth	11.5 GHz
Input impedance	50 Ω (unterminated!)
Noise	< 5 mV of noise
Features	No internal trigger pick-off signal No internal termination

Links

• S-6 internal photo and simulation
• Repairing an S-6 head (with internal photos)
• S-6 @ amplifier.cd 7S12 page
• S-6 @ barrytech.com

Pictures

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  S-6 front

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  S-6, entire plugin

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  S-6 sampling head and S-52 pulse generator head in a 7S12 TDR/Sampler plugin

Measurements

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  Impulse taken with S6 sampling head. Every dot is equivalent to one sample taken, and combined on the CRT with a rate of app. 100 Hz. Bright dots are newer than dimmed ones.

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  Incident pulse from an S-52 (nom. < 25 ps) displayed by an S-6 head (nom. < 30 ps), both installed in a 7S12. Displayed rise time ~35 ps confirms spec.

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  "Self Portrait" of an S-6: A pulse reflected on the unterminated "through" path (approx. 120 ps one way)