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 the 11K Series Introduction video on our Video Gallery.