Tek SD26, Dual Sampling Head

Features

The SD-26 is a dual-channel, 20 GHz equivalent bandwidth sampling head. This sampling head has the same acquisition capability as the SD-24 TDR/Sampling Head but does not include the TDR step generators.

• 0 GHz Bandwidth
• Dual-channel

Specifications

Acquisition System - SD-14, SD-22, SD-24, SD-26: dual channel; SD-20, SD-32: single channel.

Rise Time - SD-14: 140 ps; SD-20, SD-24, SD-26: 17.5 ps; SD-22: 28 ps, all from 10% to 90%.

Bandwidth - 3 GHz (typical) for the SD-14; 20 GHz for the SD-20, SD-24, and SD-26; 12.5 GHz for the SD-22; 50 GHz for the SD-32.

Dynamic Range - 1 V p-p within a ±1.6 V range for the SD-20, SD-22, SD-24, SD-32; 7 V p-p within a ±3.5 V offset range for the SD-14.

Dot Transient Response - Accuracy after calibration at operating temperature is ±5% for signals up to 0.5 V p-p. Adjustable to unity for signals up to 1.0 V p-p.

Input Impedance - SD-22, SD-24, SD-26, SD-32: 50 Ohm ±0.5 Ohm. SD-14 is 100 kilohm and 0.5 pF (0.55 pF for Option 01). SD-20 is not terminated and not rated.

Displayed Noise -

Aberrations (typical) (SD-20, SD-22, SD-24, SD-26 only) - The following are acquisition aberrations. 10 ns to 20 ps before step: ±3% or less. <300 ps after step: +10%, -5% or less. 300 ps to 5 ns after step: ±3% or less. 300 ps to 5 ns after step: ±4 or less (SD-20 only). 5 ns to 100 ns after step: ±1% or less. Elsewhere: ±0.5% or less.

Aberrations (typical) (SD-14 only) - <1.5 ns after step: +12%, -25%, 1.5 ns to 4 ns after step: +1%, -3%, 4 ns to 30 ns after step: ±2%. Elsewhere: ±1%.

Maximum Input Voltage - ±3 V. SD-14: ±15 V; SD-32: ±2 V.

Isolation Between Channels - 1% p-p voltage transmission from the channel driven by the 067-1338-00, to the quiescent channel (see Multi-channel Unit/Delay Line/Static Isolation Unit/Calibration Step Generator, SM-11 * DL-11 * SIU 800 in this catalog).

Time Coincidence Between Channels - 10 ps accuracy; <0.2 ps/°C stability.

Reflected - 35 ps or less, 10% to 90%, at +250 mV or -250 mV output.

TDR Step Amplitude - Adjustable to ±250 mV (polarity of either step may be inverted).

Time Coincidence Between TDR steps - Adjustable to less than 1 ps.

Source Resistance - 50 Ohm ±0.5 Ohm.

Aberrations (at ±250 mV amplitude) - The following are TDR aberrations. 10 ns to 20 ps before step: ±3% or less. <300 ps after step: +10%, -5% or less. 300 ps to 5 ns after step: ±3% or less. Elsewhere: ±1% or less.

(11801C, CSA 803C, SD-Series Heads)

Temperature - Operating: 0°C to +50°C; nonoperating: -40°C to +75°C.

Altitude, Vibration, Shock, Bench Handling - Operating and nonoperating: meets MIL-T-28800C, Type III, Class 5.

Electromagnetic Compatibility (not SD-14) - Meets the following requirements of MIL-STD-461C: CE-03 Pt 4 Curve 1, CS-01 Pt 7, CS-02 Pt 4, CS-06 Pt 5, RE-02 Pt 7, RS-01 Pt 4, RS-02 Pt 5, RS-03 Pt 7 (limited to 1 GHz). Meets FCC Part 15, subpart J, Class A. For Germany: Meets VDE 0871/6.78 Class B. (Not all for SD-14.)

Humidity - To 95% RH at up to 50°C.

Input Signal - Frequency range is 1 to 20 GHz. Stable synchronization on signals of at least 100 mV p-p, as measured separately into 50 Ohm, 5 V p-p max.

Input Characteristics - 50 Ohm SMA (3 mm) connector. Open termination paralleled by 1 pF.

Trigger Output - Approximately 200 mV into 50 Ohm. Jitter is 6 ps rms or less with signals from 5 to 20 GHz; 7 ps rms or less with signals from 1 to 5 GHz. Kickout at signal input is 180 mV peak; kickout occurs between successive samples.

Ordering Information

Tek SD26, Dual Sampling Head

Includes: Installation/User Reference (070-7226-02), Service Reference (070-7227-02), 2 SMA Short-circuit Terminations (015-1020-00).

Recommended Accessories

P6150 - 50 Ohm Divider Probe, 2 tips: 1X, 10X. 1X: 3 GHz; 10X: 9 GHz.

- 20X, 3 GHz/KOhm.
See 50 Ohm Divider (Zo) Low Capacitance, P6150. Requires SMA Male-to-BNC female adapter when attached to SMA-type inputs. Order 015-0554-00.

Also see Additional Accessories, Travel Accessories.

2X Attenuator - SMA Male-to-female. Order 015-1001-00.

5X Attenuator - SMA Male-to-female. Order 015-1002-00.

75 Ohm to 50 Ohm Min. Loss Attenuator -
BNC. Order 011-0112-00.

Blank Sampling Head - Order 200-3395-00.

SMA Accessory Kit - 2 ea. 2X and 5X Attenuators; 2 ea. SMA Terminations, Male Short Circuit, Female Short Circuit, Male 50 Ohm , Female 50 Ohm, 2 ea. 50 Ohm Signal Cables (2 ns), 2 ea. 500 ps Semi-rigid Cable, 2 ea. Male-to-male Adapters, 2 ea. SMA Male-to-BNC Female, 2 ea. Female-to-female, 1 ea. 50 Ohm Power Divider, 1 ea. Combination Wrench (.312, 6 point). Order 020-1693-00.

ECL Terminator - Provides the bias and termination for ECL device outputs. At 10 GHz bandwidth and 1% precision attenuation, accurate AC and DC measurements are ensured. Attenuation: 10X ±1.0% @ DC, 20 dB ±3 dB, DC to 10 GHz. Aberrations: ±3% max with 100 ps Rise Time. Order 015-0558-00.

DC Block (Coupling Capacitor) - BNC. Order 015-1013-00.

Slip-on Connector - Order 015-0553-00.

Connector Savers - (SMA) Order 015-0549-00.

Sampling Head Extender Cables -
(1 m) Order 012-1220-00.
(2 m) Order 012-1221-00.

Acquisition Extender - Order 067-1324-00.