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7000 Series plug-in interface: Difference between revisions
7000 Series plug-in interface (view source)
Revision as of 18:01, 25 September 2021
, 25 September 2021added extra info about Aux sweep gate and 7B87
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(added extra info about Aux sweep gate and 7B87) |
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* ''Trigger Holdoff'' − 0/+5 V, generated by time-base, high during holdoff time of time-base, used in mainframe for ALT sequencing. | * ''Trigger Holdoff'' − 0/+5 V, generated by time-base, high during holdoff time of time-base, used in mainframe for ALT sequencing. | ||
* ''Chop Drive'' − 0/+5 V; switches at one-half the rate of the VERTICAL MODE CHOP signal; high level selects channel 2, low level selects channel 1 of a dual-trace plug-in. | * ''Chop Drive'' − 0/+5 V; switches at one-half the rate of the VERTICAL MODE CHOP signal; high level selects channel 2, low level selects channel 1 of a dual-trace plug-in. | ||
* ''Aux Sweep Gate'' − 0/+5 V; pulled high by dual-sweep time-base plug-ins during auxiliary sweep. | * ''Aux Sweep Gate'' − 0/+5 V; pulled high by dual-sweep time-base plug-ins during auxiliary sweep. Used to deliver the realtime clock signal from [[7B87]] to [[7854]]. | ||
* ''Alt Drive'' − 0/+5 V; high level will display channel 2 of a dual-trace plug-in, low will display channel 1. | * ''Alt Drive'' − 0/+5 V; high level will display channel 2 of a dual-trace plug-in, low will display channel 1. | ||
* ''Intensity Limit'' − Switched to ground by timebase in slow sweep speeds (≥100 ms/Div), limits beam intensity to protect the CRT [[phosphor]]. | * ''Intensity Limit'' − Switched to ground by timebase in slow sweep speeds (≥100 ms/Div), limits beam intensity to protect the CRT [[phosphor]]. | ||