P6230: Difference between revisions
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low-frequency and DC components, similar to the feed-beside technique used in the [[7104]] scope and [[7A29]] amplifier. | low-frequency and DC components, similar to the feed-beside technique used in the [[7104]] scope and [[7A29]] amplifier. | ||
The P6230 shares accessories with many other Tektronix [[subminiature modular probes]] although the input hybrid is unique. | |||
Tip color is yellow, connector end color is blue, part number [[206-0279-00]]. Its end to end resistance is 400 Ω. | Tip color is yellow, connector end color is blue, part number [[206-0279-00]]. Its end to end resistance is 400 Ω. | ||
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{{Spec | Input Impedance | 450 Ω // 1.3 pF (1.6 pF guaranteed) }} | {{Spec | Input Impedance | 450 Ω // 1.3 pF (1.6 pF guaranteed) }} | ||
{{Spec | Signal delay | 8.7 ± 0.1 ns }} | {{Spec | Signal delay | 8.7 ± 0.1 ns }} | ||
{{Spec | DC Offset range | -5 V ≤ (V<sub>signal</sub> + | {{Spec | DC Offset range | -5 V ≤ (V<sub>signal</sub> + V<sub>offset</sub>) ≤ +5 V }} | ||
{{Spec | Features | | {{Spec | Features | | ||
* Readout Pin | * Readout Pin | ||
Revision as of 02:46, 11 December 2015
The Tektronix P6230 is a passive ×10 (450:50 Ω) probe with 1.5 GHz bandwidth and DC offset capability, intended to minimize probe-loading effect when used on logic circuits.
It can be powered from 7000 series mainframes having LEMO S-series connectors for probe power, or compatible units such as the 1101.
The P6230 is sometimes described as a FET probe or an active probe, however, as the circuit diagram clearly shows, this is not the case. The input signal runs through a 400 Ω resistor and a 1 μF capacitor, terminated in 50 Ω internally (switchable) or externally. The active circuit in the P6230, a standard NE5532 dual opamp, has the function of restoring and offsetting the input signal's low-frequency and DC components, similar to the feed-beside technique used in the 7104 scope and 7A29 amplifier.
The P6230 shares accessories with many other Tektronix subminiature modular probes although the input hybrid is unique. Tip color is yellow, connector end color is blue, part number 206-0279-00. Its end to end resistance is 400 Ω.
Key Specifications
| Bandwidth | DC to ≥ 1.5 GHz |
|---|---|
| Rise time | ≤ 230 ps |
| Attenuation | 10× |
| Input Impedance | 450 Ω // 1.3 pF (1.6 pF guaranteed) |
| Signal delay | 8.7 ± 0.1 ns |
| DC Offset range | -5 V ≤ (Vsignal + Voffset) ≤ +5 V |
| Features |
|
Links
- P6230 @ barrytech.com (incorrectly described as active probe)
Manuals
- P6230 Operator's manual (PDF, 155KB)
Prices
| Year | 1985 | 1989 |
|---|---|---|
| Catalog price | $395 | $420 |
| 2015 value | $870 | $800 |
Pictures
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P6230 compensation box
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P6230 probe tip with alligator clip ground lead
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Switchable terminator
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Probe tip components
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Compensation box interior
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Compensation box interior
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P6230 circuit diagram
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P6230 input impedance graph
Measurements
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9.2 * 20 ps = 184 ps (equiv. to 1.9 GHz bandwidth)
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Effect of using the "low inductance" ground lead - rise time 400 ps, bandwidth 875 MHz
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Using the 250 mm alligator ground lead - severe pulse distortion, rise time ~3 ns (115 MHz)!
