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Revision as of 05:58, 9 May 2018

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(Created page with "==Internals Common to the 11301 and 11302 == In this section, "11300" refers to the 11301 and 11302. The 11300 is a digitally controlled analog oscilloscope. Like a typical ...")
 
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==Internals Common to the 11301 and 11302 ==
The Tektronix 11300 is a series of digitally controlled analog scopes.
In this section, "11300" refers to the 11301 and 11302.
The series consists of four models:
* 11301
* 11301A
* 11302
* 11302A
 
The four 11300 models have most of their circuitry in common.
They differ in only two respects:
* the 11302 and 11302A have an MCP CRT, whereas the 11301 and 11301A have a non-MCP CRT
* the 11301A and the 11302A have 750 MHz counters, whereas the 11301 and 11302 have 500 MHz counters
 
The MCP CRT has a smaller graticule than the non-MCP CRT.
 
The 11300 vertical signal path starts with a plug-in amplifier.
The signal from the plug-in goes to the channel switch.
The output of the channel switch goes to the vertical amplifier.
The vertical amplifier drives the deflection plates of the CRT.
 
The 11300 horizontal signal path starts with the plug-in amplifier.
The plug-in provides a trigger signal to the mainframe.
The trigger signals from the plug-ins are fed to the A and B trigger circuits.
The A and B triggers control the start signal of the A and B sweeps, respectively.
The A and B sweep outputs (ramps) are fed to the horizontal amplifier, which contains an input multiplexer.
The output of the horizontal amplifier drives the deflection plates of the CRT.
 
The A and B triggers also send trigger pulses to the counter/timer circuit.
The counter/timer measures the time between trigger events.
 
11300-series scopes contains contains a significant amount of digital circuitry.
The digital circuitry is not in the signal path.
The mainframe has a 80186 microprocessor.
Each 11000-series plug-in contains an 8051-family microcontroller.
In addition to the microprocessors, the mainframes and plug-ins contain custom Tek digital ICs.


The  11300 is a digitally controlled analog oscilloscope.
Like a typical analog scope, the 11300 has vertical amplifiers, a trigger circuit,
a timebase/sweep, a horizontal amplifier, and a CRT.
Unlike traditional analog scopes,
an 11300 system contains contains a significant amount of digital circuitry,
including multiple microprocessors, one in the mainframe and at least one in each plug-in.
The digital circuitry provides several externally-observable features:
The digital circuitry provides several externally-observable features:
* self-test and diagnosis
* self-test and diagnosis
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