7A18
The Tektronix 7A18 is a general-purpose 75 MHz dual-trace vertical plug-in for 7000-series scopes.
Model 7A18N is identical except it omits the readout circuits.
Specifications
Input impedance: 1 MΩ in parallel with 20 pF. Deflection factors: 5 mV/div to 5 V/div