From TekWiki
Revision as of 03:17, 21 July 2022 by Peter (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search
Tektronix P6032
850 MHz cathode-follower probe

Compatible with 1S1

Produced from 1962 to (?)


Manuals – Specifications – Links – Pictures

The Tektronix P6032 is an 850 MHz cathode-follower probe, intended for use with samplers such as the 1S1, 3S1, 3S76, 4S1, and 4S2. It was designed by Murlan Kaufman.

There is an EC1000 subminiature triode in the probe body, which is why it gets slightly warm during operation.

Like all active probes, the P6032 requires power, and for this reason it has two connectors at the scope end of the cable. There is a four-pin power connector and a 50 Ω GR-874 connector for the signal.

The triode has limited dynamic range, so attenuator attachments are provided that attach to the tip of the probe. These attenuators also reduce the loading of the probe on the probed circuit.

What, exactly, does the clipping line in the probe body do?

It appears to be 21 mm of RG-174 cable connected to the triode's cathode at one end, and open at the other end.
The circuit description in the manual describes it vaguely, saying only that, "The clipping line reduces signal aberration to a minimum."

Key Specifications

Bandwidth ≥850 MHz
Rise time 0.4 ns max.
Attenuation 10× to 1000× in 1-2-5 steps with supplied attenuator heads, 3× without attenuator
Dynamic range ±0.15 V × attenuation
Maximum input voltage ±0.225 V × attenuation, de-rated for CW operation for 500× and 1000× attenuator heads
Input resistance 10 MΩ with any attenuator head, 3 MΩ without attenuator head
Input capacitance 3.6 pF (10× head) to 1.3 pF (1000× head), 7 pF without attenuator head
Output impedance not specified, calibrated for 50 Ω load
DC offset ≈0.5 V (not adjustable)


Some Parts Used in the P6032

Page Class Description Used in
EC1000 Vacuum Tube (Triode) subminiature triode P6025 P6032