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Tektronix 11A81
3 GHz vertical amplifier plug-in
Tektronix 11A81

Compatible with 11000-series scopes

Produced from (?) to (?)

Manuals – Specifications – Links – Pictures

The Tektronix 11A81 is a 3 GHz single-channel sampler/amplifier plug-in for 11000-series scopes, primarily the 11403A. The 11A81 receives an "acquisition strobe" signal from the mainframe, and samples the input signal. The sampled signal is fed to the mainframe, where it is digitized and displayed. This architecture allows the 11A81 to provide higher bandwidth than the 11k plug-in to mainframe signal path.

A 165-2448-00 (U950) diode bridge IC is used for over-voltage protection. A 165-2392-00 (U650) H2392 sampling bridge performs the sampling.


Bandwidth DC to 3 GHz (in 11403A/CSA404 only)
Rise time < 130 ps
Deflection 10 mV to 1V per division
Input impedance 50 Ω