P6205

Tektronix 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

Manual

• Tektronix P6205 Manual (PDF)
• Tektronix P6203 P6204 P6205 P6217 P6231 Catalog Specs (PDF)

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.