The 11K series of oscilloscopes replaced the 7K series in 1986.  The user interface is completely refreshed using a touch screen and menu system.  As such there are few controls on the mainframe or plug-ins.

This 1986/87 issue of Handshake describes the new 11K series.  Click on the image to view the PDF.

This same 1986/87 issue of Handshake describes the new 11300 series of analog oscilloscopes.  Click on the image to view the PDF.

The 11300 series oscilloscopes consisted of the 11301 (400MHz bandwidth with a high resolution standard CRT) and 11302 (500 MHz bandwidth with a microchannel plate CRT).  The 11300 series oscilloscopes also featured an internal 500 MHz universal counter-timer that provides precise measurement of frequency, period, width, ratio, totalize and time A→B.  Two unique features of the 11300 series are histogram-based measurements and video holdoff / trigger.  The histogram feature is all done with triggers and the counter.  No waveform digitizer is used.  Previous oscilloscopes required expensive options or plug-in modules to provide synchronization of NTSC or PAL video but the 11300 series was able to achieve this feature with a handful of parts on a 1"x3" PCB that is part of the timebase board.  The A revisions of the oscilloscopes increased the internal universal counter-timer to 750 MHz and added advanced triggering functions.

Like all 11K series, the 11300 series does a calibration of the mainframe and plug-ins on power up.  However, the 11300 series can also do an Enhanced Accuracy calibration to the actual graticule.  A beam is scanned rapidly across graticule lines, so fast that the trace looks like a bright, well-defined rectangle. It is very interesting to watch.

The museum has a 11301A 400 MHz analog programmable oscilloscope which was introduced in 1987. The mainframe accepts three plug-ins and this oscilloscope is configured with an 11A34 Four Channel Amplifier and a 11A52 600 MHz dual-channel plug-in.


This same 1986/87 issue of Handshake describes how to choose a digitizer and provides an overview of the 11K series plug-ins.  Click on the image to view the PDF.

The 11A34 Four Channel Amplifier is designed around four M377 Tektronix integrated circuits which have been described as a "plug-in on a chip".  The M377s are laser trimmed per end application and contain about 710 transistors in a Tektronix 6.5 GHz SH3 bipolar technology.

John Addis authored this article describing the M377 integrated circuit.  Click on the image to view the PDF.


We have a series of three short videos on the 11301A and 11302A on our Video Gallery.

We have the 11K Series Introduction video on our Video Gallery.