Tektronix 7D15 255 MHz Universal Counter/Timer, for 7000 Series Oscilloscopes

Tektronix 7B53AN Plug-In Module Dual Time Base for 7000 Series Oscilloscopes

Tektronix 7B85 Delaying Time Base 7000 Series Oscilloscope Plug-In Module (nice)

Tektronix 7B87 Time Base 7854 7000 Series Oscilloscope Plug-In Module (nice)

Tektronix 7B53AN Plug-In Module Dual Time Base Amp for 7000 Series Oscilloscopes

Tektronix 7L5 Spectrum Analyzer Plug-In Module 7000 Series w/ L3 installed

Tektronix 7B80 Time Base Plug-In, Tested, for 7000 Series Oscilloscopes

Tektronix 7B53A 100 MHz Dual Time Base Plug-In Module 7000 Series Oscilloscopes