S-6

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Tektronix S-6
Sampling Head
S-6 head

Compatible with 7000 and 3S series sampling heads

Produced from 1971 to 1990

Manuals
Manuals – Specifications – Links – Pictures

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 strongly recommended to leave a termination resistor on the unit when unused to give some protection against electrostatic discharge.

The S-6 does not provide a trigger pickoff signal.

Key Specifications

Rise time 30 ps
Bandwidth 11.5 GHz
Input voltage 1 Vp-p (operating)
Maximum input ±5 VDC
Maximum single sample step 250 mV for less than 5% aberration
Input impedance 50 Ω (unterminated!)
Noise < 5 mV of noise

Internals

The S-6 is very similar to the S-4 in that it uses a 6-diode traveling wave trapped-charge sampling gate. This gate is implemented in the 155-0053-00 hybrid. Since the S-6 is a feed-through sampling head, the blow-by compensation is implemented slightly differently using a 10 k resistor in the hybrid directly connected to the input signal.

The S-6 replaces the discrete preamplifier of the S-4 with two opamps from a 155-0035-00 quad opamp chip. The two other opamps are used to buffer the gate bias voltages.

Links

Patents that may apply to S-6

Page Title Inventors Filing date Grant date Links
Patent US 3629731A Sampling system George Frye 1968-07-12 1971-12-21 Sampling • S-4 • S-6

Documents Referencing S-6

Document Class Title Authors Year Links
42W-5850.pdf Application Note Preventing Sampling Head Overdrive and Static Damage Gary Mott 1985 Sampling • S-1 • S-2 • S-3A • S-4 • S-5 • S-6
Rochester LLE Review Volume 25.pdf Article Computerized, Wide-Bandwidth, Multichannel, Soft X-Ray Diode Spectrometer for High Density Plasma Diagnosis 1985 7S12 • S-52 • S-6 • LM7912 • LM7912A • 7912DPO
RISOM2873.pdf Article Improvement of the Bandwidth of the Transient Digitizers in the LIDAR Thomson Scattering Diagnostic on JET Erik Kristensen 1990 7912AD • 7A29 • 7704A • 7S12 • S-6 • S-52

Prices

1979: $1,345 (~$5,600 in 2023 dollars)

According to an internal memo, annual sales were estimated at 225 units in 1979.

Pictures

  • S-6 front

    S-6 front

  • S-6, entire plugin

    S-6, entire plugin

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

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

  • S-6 with a black face plate

    S-6 with a black face plate

  • S-6 schematic

    S-6 schematic

  • S-6 internal left side

    S-6 internal left side

  • S-6 internal right side

    S-6 internal right side

  • S-6 internal right side

    S-6 internal right side

  • S-6 internal left side, Preamp board removed

    S-6 internal left side, Preamp board removed

  • S-6 internal all boards removed, 155-0053-00 hybrid remains

    S-6 internal all boards removed, 155-0053-00 hybrid remains

  • S-6 Preamp board top

    S-6 Preamp board top

  • S-6 Preamp board backside

    S-6 Preamp board backside

  • S-6 Strobe board backside

    S-6 Strobe board backside

  • S-6 interconnect board

    S-6 interconnect board

  • 155-0053-00 hybrid sampling diode assembly

    155-0053-00 hybrid sampling diode assembly

  • 155-0053-00 hybrid sampling diode assembly (internal)

    155-0053-00 hybrid sampling diode assembly (internal)

  • 155-0053-00 hybrid sampling diode assembly with lid

    155-0053-00 hybrid sampling diode assembly with lid

  • 155-0053-00 hybrid sampling diode assembly (internal)

    155-0053-00 hybrid sampling diode assembly (internal)

  • 155-0053-00 hybrid sampling diode assembly (internal)

    155-0053-00 hybrid sampling diode assembly (internal)

Measurements

  • 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.

    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.

  • 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.

    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.

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

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

Components

Some Parts Used in the S-6

Part Part Number(s) Class Description Used in
152-0335-00 152-0335-00 Discrete component step recovery diode S-4 • S-6
152-0335-01 152-0335-01 Discrete component 150 ps step recovery diode 1502 • S-2 • S-4 • S-6
155-0035-00 155-0035-00 • 155-0116-00 Monolithic integrated circuit quad op-amp 3110 • 3S7 • 3T7 • 492 • 492A • 492AP • 492P • 494 • 494P • 496 • 496P • 4010 • 4011 • 4012 • 4013 • 7L5 • 7L12 • 7L13 • 7L14 • 7L18 • 7S11 • 7T11 • 7S12 • S-6 • 1461 • 4602 • P7001 • 613 • 653
155-0053-00 155-0053-00 Hybrid integrated circuit sampler S-6
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