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7000 Series plug-in interface: Difference between revisions
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===Description of signals=== | ===Description of signals=== | ||
* ''Sweep Gate'' − 0/+5 V, high while sweep is running (beam unblanking), connected to +5 V in amplifier plugins; +Gate Output on mainframe uses Sweep Gate from H slot A when A Gate is selected, and from H slot B when B is selected | * ''Sweep Gate'' − 0/+5 V, high while sweep is running (beam unblanking), connected to +5 V in amplifier plugins; +Gate Output on mainframe uses Sweep Gate from H slot A when A Gate is selected, and from H slot B when B is selected. | ||
* ''Delay Mode Control'' − Output on delaying timebase in horizontal slot A, connected to input on delayed timebase in horizontal slot B. >+3 V disables auto sweep in delayed timebase; 0 V enables independent timebase function. Grounded in amplifier plugins. | * ''Delay Mode Control'' − Output on delaying timebase in horizontal slot A, connected to input on delayed timebase in horizontal slot B. >+3 V disables auto sweep in delayed timebase; 0 V enables independent timebase function. Grounded in amplifier plugins. | ||
* ''A/B Sweep'' − 500 mV<sub>p-p</sub>, negative-going copy of sweep signal from timebase, not affected by X position control or magnifier; Used for mainframe's Sawtooth Out, additionally fed to V plugins | * ''A/B Sweep'' − 500 mV<sub>p-p</sub>, negative-going copy of sweep signal from timebase, not affected by X position control or magnifier; Used for mainframe's Sawtooth Out, additionally fed to V plugins. | ||
* ''Line Trigger'' − Approx. 1 V<sub>RMS</sub> mains-frequency signal from power supply (through transformer) | * ''Line Trigger'' − Approx. 1 V<sub>RMS</sub> mains-frequency signal from power supply (through transformer). | ||
* ''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. | ||
* ''Alt Drive'' − 0/+5 V; high level will display channel 2 of a dual-trace plug-in | * ''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]]. | ||
* ''Mainframe Channel Switch'', ''Mainframe Mode'' − 0/+5 V logic levels; plug-in output is displayed when MF Channel Switch ≠ MF Mode (XOR) | * ''Mainframe Channel Switch'', ''Mainframe Mode'' − 0/+5 V logic levels; plug-in output is displayed when MF Channel Switch ≠ MF Mode (XOR). | ||
* ''Sweep Inhibit/Sweep Lockout'' - Mainframe injects current > 1 mA to prevent time base from sweeping. Used for ALT sequencing and delayed sweep of the ''B'' time base. | * ''Sweep Inhibit/Sweep Lockout'' - Mainframe injects current > 1 mA to prevent time base from sweeping. Used for ALT sequencing and delayed sweep of the ''B'' time base. | ||
* ''Delay Gate'' − negative-going pulse starting at the end of the delay period, and lasting until the end of the sweep from the delaying timebase. Mainframes connect this signal from the ''A'' timebase through a | * ''Delay Gate'' − negative-going pulse starting at the end of the delay period, and lasting until the end of the sweep from the delaying timebase. Mainframes connect this signal from the ''A'' timebase through a 2 k resistor and a diode to B8 ''Sweep inhibit'' of the ''B'' time base to trigger the delayed sweep. +Gate Output on mainframe uses Delay Gate from H slot B when Delay Gate is selected. Grounded in amplifier plugins. | ||
* ''Single sweep ready'' − 0/+5 V, high when single sweep is ready | * ''Single sweep ready'' − 0/+5 V, high when single sweep is ready. | ||
* ''X comp. inhibit'' − Connected to ground in amplifiers, switched to ground by timebase set to amplifier (X-Y) mode to enable X-Y delay compensation in scopes with that function ([[7904|7904 Opt.2]], [[7104|7104 Opt.2]]) | * ''X comp. inhibit'' − Connected to ground in amplifiers, switched to ground by timebase set to amplifier (X-Y) mode to enable X-Y delay compensation in scopes with that function ([[7904|7904 Opt.2]], [[7104|7104 Opt.2]]). | ||
* ''Signal'' − Signal output from plugin to mainframe. Differential, 50 Ω per side. 50 mV/Div (differential). | * ''Signal'' − Signal output from plugin to mainframe. Differential, 50 Ω per side. 50 mV/Div (differential). | ||
* ''Trigger'' − Copy of signal output from V plugin to mainframe. Differential, 50 Ω per side. 50 mV/Div (differential). Terminated on H slots. | * ''Trigger'' − Copy of signal output from V plugin to mainframe. Differential, 50 Ω per side. 50 mV/Div (differential). Terminated on H slots. | ||
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* ''Single Sweep Reset'' − Switched to ground to reset single sweep. | * ''Single Sweep Reset'' − Switched to ground to reset single sweep. | ||
* ''Aux Y-Axis'' − Current-driven input to mainframe allowing vertical separation of two traces with dual timebase plugins. 1 mA/Div sensitivity. | * ''Aux Y-Axis'' − Current-driven input to mainframe allowing vertical separation of two traces with dual timebase plugins. 1 mA/Div sensitivity. | ||
* ''Aux Z Axis'' − Current-driven input to mainframe allowing plugins to modulate beam intensity, e.g. in dual timebase A intensified by B display mode; driven only when plug-in output is displayed (see MF Ch Switch above) | * ''Aux Z Axis'' − Current-driven input to mainframe allowing plugins to modulate beam intensity, e.g. in dual timebase A intensified by B display mode; driven only when plug-in output is displayed (see ''MF Ch Switch'' above). | ||
* ''Trigger In'' − Trigger signal input on H plugin, routed from V plugin's trigger output. Differential, 50 Ω per side, 50 mV/Div (differential). | * ''Trigger In'' − Trigger signal input on H plugin, routed from V plugin's trigger output. Differential, 50 Ω per side, 50 mV/Div (differential). | ||
* ''Aux Trigger In'' − Only used by [[7B52]] | * ''Aux Trigger In'' − Only used by [[7B52]]. | ||
* ''GPIB lines'' − Control signal functions are the same as their [[GPIB interface|IEEE-488 (GPIB)]] equivalents. Time slot lines 2 to 9 double as IEEE-488 data lines. | * ''GPIB lines'' − Control signal functions are the same as their [[GPIB interface|IEEE-488 (GPIB)]] equivalents. Time slot lines 2 to 9 double as IEEE-488 data lines. | ||
* ''TS1−TS10'' − [[7000 series readout system|readout system]] time slot pulses. Idle 0, active −15 V. | * ''TS1−TS10'' − [[7000 series readout system|readout system]] time slot pulses. Idle 0, active −15 V. | ||
* ''Force Readout'' − Allows plug-in readout information to be displayed regardless of the mainframe mode switch setting when pulled low (<0.5 V). Used by | * ''Force Readout'' − Allows plug-in readout information to be displayed regardless of the mainframe mode switch setting when pulled low (<0.5 V). Used by several 7DXX plug-ins. | ||
* ''Plugin Mode'' − 5-level signal providing the mainframe with information about the operating mode of a dual-trace or dual-sweep plugin. | * ''Plugin Mode'' − 5-level signal providing the mainframe with information about the operating mode of a dual-trace or dual-sweep plugin. | ||
* ''Ch1/2 Row/Col'' − Analog current inputs to the readout system. Ch1 refers to the first channel within the plugin slot in question and is associated with the readout field on top of the screen. Ch2 is the 2nd channel displayed at the bottom. Row/Current signals accept negative currents in 100 μA steps; typically, plugins contain resistors from time slot signal lines to row/current lines. | * ''Ch1/2 Row/Col'' − Analog current inputs to the readout system. Ch1 refers to the first channel within the plugin slot in question and is associated with the readout field on top of the screen. Ch2 is the 2nd channel displayed at the bottom. Row/Current signals accept negative currents in 100 μA steps; typically, plugins contain resistors from time slot signal lines to row/current lines. | ||