P6205
The Tektronix P6205 is a 750 MHz active FET probe for TDS500 series, DSA600 series, CSA404 and 11000-series scopes with Tekprobe BNC inputs.
Key Specifications
| Bandwidth | 750 MHz (probe only) 600 MHz on 11A72 450 MHz on TDS500/600 |
|---|---|
| Rise time | < 467 ps |
| Attenuation | 10× |
| Input impedance | 1 MΩ // 2 pF |
| Output | into 50 Ω |
| Dynamic range | ±10 V |
| Max. input voltage | 40 V DC + peak AC non-destructive |
| Interface | Tekprobe BNC connector |
Pictures
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Exploded view of the probe assembly. The PCB is soldered to the shielding tube and the coax, and the tube is then crimped over the coax.
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The probe uses "lossless" 50 Ω coax, as there's amplification at the business end. The circuitry connects to the TekProbe interface to declare the probe's identity to the scope.
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The tip network comprises three laser-trimmed resistors and a laser-trimmed capacitor. The tip resistance measures 800 kΩ, the middle resistor was on the order of 25 Ω, and the resistance to ground is 200 kΩ. This makes a 1/5 divider from tip to the amplifier.
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It looks like the amplifier has two identical sections, presumably the same chip is used for differential active probes.
