The Tektronix P6205 is a 750 MHz active FET probe for TDS500 series, DSA600 series, CSA404 and 11000-series scopes with Tekprobe BNC inputs.
||750 MHz (probe only)|
600 MHz on 11A72
450 MHz on TDS500/600
||< 467 ps
||1 MΩ // 2 pF
||into 50 Ω
|Max. input voltage
||40 V DC + peak AC non-destructive
||Tekprobe BNC connector
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.
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.
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.
It looks like the amplifier has two identical sections, presumably the same chip is used for differential active probes.