Tektronix Oscilloscopes 7904, 2467B, 2465B at 1GHz
The images to follow show a 1 GHz sine wave (amplitude not changed during the testing) on the following Tektronix oscilloscopes:
Tektronix 7904 with 7A24 vertical (400 MHz) and 7B92A horizontal
Tektronix 2467B (400 MHz scope)
Tektronix 2465B (400 MHz scope)
I have checked the bandwidth of the both the 2465B and 2467B used here, and they meet the 400MHz requirement at -3db (using a Tektronix SG504 with leveling head). The bandwidth of the 7904 mainframe + 7A24 vertical plug-in used in this test is about 450 MHz (-3db), but it remains at almost that level out to > 600 MHz. At 1 GHz I can still easily get 175 mV of signal on the screen of the 7904 + 7A24 where the two newer scopes can only manage 25 mV or less.
Tektronix 7904 Oscilloscope
Here are some images of one 7904 mainframe with a 7A24 vertical module and a 7B92A horizontal module. The scope screen shows the pulse from an S52 pulse head; the rise time is about 850ps which translates into a bandwidth of about 412 MHz. Since the 7A24 plug-in is specified at 400 MHz, this is about right.
This is the same pulse from an S52 pulse head but using an S4 sampling head instead of the 7A24 vertical amplifier
Tektronix 7000 Series Equipment
I am doing some testing on recently acquired Tektronix 7000 series equipment. Involved in these images is a Tektronix 7904A mainframe using a 7S12 TDR/Sampler plug in with an S52 pulse generator and S4 sampling head.
The rise time on of the pulse is about 32ps which translates to a bandwidth of about 11 GHz; all this for a few hundred dollars.