485: Difference between revisions
mNo edit summary |
(template change) |
||
| Line 3: | Line 3: | ||
image=Tektronix 485 oscilloscope2.jpg| | image=Tektronix 485 oscilloscope2.jpg| | ||
caption=Tektronix 485| | caption=Tektronix 485| | ||
introduced=1973 | | |||
discontinued=(?) | | |||
summary=350 MHz portable scope| | summary=350 MHz portable scope| | ||
manuals= | manuals= | ||
Revision as of 03:57, 17 August 2014
The Tektronix 485 is a dual-trace, portable analog oscilloscope with a maximum bandwidth of 350 MHz. The impedance of the inputs can be set individually to 50 Ω or 1 MΩ. The scope achieves its maximum bandwidth when the inputs are in 50 Ω mode.
The 485 was introduced in March of 1972. It includes a switching power supply and uses custom integrated circuits for most of the gain blocks. Triggering is inplemented with tunnel diodes.
A distinguishing feature – at least in a portable oscilloscope of its period – is the Alternate Horizontal Mode. In this mode, the B timebase is shown in a separate full-width scan, as opposed to the more common Mixed Mode, where the B timebase is shown on the same line as the A timebase, after the delay time. At the same time, the section shown with the B timebase is shown highlighted in the A scan.
The 465, which was introduced after the 485, only received this feature in its "B" incarnation (465B).
Specifications
please add
