500 Series plug-in interface: Difference between revisions

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[[File:500 series plugin interface V.png|thumb|450px|right| Plug-in pinout from [[535]] schematic - click to enlarge]]  
[[File:500 series plugin interface V.png|thumb|400px|right| Plug-in pinout from [[535]] schematic - click to enlarge]]  


The '''plug-in interface of the [[500-series scopes]]''' is a single 16-pin Amphenol connector.
The '''plug-in interface of the [[500-series scopes]]''' is a single 16-pin Amphenol connector.
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==Pin-out==
==Pin-out==


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| bgcolor="LightGreen"  |  Control Signals 
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'''Internal Trigger signal'''


In early 500-series systems (e.g., a [[C|Type C]] plug-in in a [[535]] mainframe),
In early 500-series systems (e.g., a [[C|Type C plug-in]] in a [[535|535 mainframe]]),
the mainframe's triggering is based on the main vertical signal
the mainframe's triggering is based on the main vertical signal
sent by the plug-in to the mainframe on pins 1 and 3.
sent by the plug-in to the mainframe on pins 1 and 3.
In these scopes,
 
changing the vertical position control on the plug-in
In these scopes,changing the vertical position control on the plug-in
interacts with the trigger level setting if the scope is set to a DC trigger mode.
interacts with the trigger level setting if the scope is set to a DC trigger mode.


In somewhat later 500-series systems, the plug-in (e.g., [[1A1|Type 1A1]])
In somewhat later 500-series systems, the plug-in (e.g., [[1A1|Type 1A1]])
provides the mainframe (e.g., [[547|Type 547]]) with a trigger signal on pin 5, separate from the main vertical signal.
provides the mainframe (e.g., [[547|Type 547]]) with a trigger signal on pin 5, separate from the main vertical signal.
The vertical position knob on the plug-in doesn't affect the DC level on the trigger signal sent from the plug-in to the mainframe.
The vertical position knob on the plug-in doesn't affect the DC level on the trigger signal sent from the plug-in to the mainframe.
This allows, in multi-trace setups, for the operator to consistently trigger from a specific input channel independent
This allows, in multi-trace setups, for the operator to consistently trigger from a specific input channel independent
of which channel is currently being drawn on CRT.
of which channel is currently being drawn on CRT.
Although the Type 1A1 has two input channels, they are not identical.
Although the Type 1A1 has two input channels, they are not identical.
Only the channel 1 signal is sent to the mainframe on pin 5.
Only the channel 1 signal is sent to the mainframe on pin 5.
The 547 has two types of INT triggering, differing in whether the mainframe's trigger circuit is fed by the
The 547 has two types of INT triggering, differing in whether the mainframe's trigger circuit is fed by the
pin 1,3 (main vertical) output of the plug-in or the pin 5 (trigger signal) output.
pin 1,3 (main vertical) output of the plug-in or the pin 5 (trigger signal) output.
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the plug-in has a knob for the selection of which input channel's signal
the plug-in has a knob for the selection of which input channel's signal
will be sent to the mainframe as the trigger signal.
will be sent to the mainframe as the trigger signal.
 
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