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The '''plug-in interface of the [[580-series scopes]]''' is a single 16-pin Amphenol 26-series connector: | The '''plug-in interface of the [[580-series scopes]]''' is a single 16-pin Amphenol 26-series connector: | ||
An unusual aspect of the 580 Series plug-in interface is | |||
the transmission line termination scheme for the plug-in output signal. | |||
The output signal passes from the plug-in, through the plug-in interface connector, | |||
through the first of two [[distributed amplifier]]s in the 580-series mainframe's signal chain, | |||
and then back into the plug-in, which contains 93 Ω resistors to match | |||
the characteristic impedance of each side the balanced transmission line. | |||
{| class="wikitable" | {| class="wikitable" | ||
Line 9: | Line 16: | ||
! Comment | ! Comment | ||
|- | |- | ||
| 1 || −150 V || R-C decoupled from mainframe | | 1 || bgcolor="Pink" | −150 V || R-C decoupled from mainframe | ||
|- | |- | ||
| 2 || +100 V || R-C decoupled from mainframe | | 2 || bgcolor="Pink" | +100 V || R-C decoupled from mainframe | ||
|- | |- | ||
| 3 || +225 V || R-C decoupled from mainframe | | 3 || bgcolor="Pink" | +225 V || R-C decoupled from mainframe | ||
|- | |- | ||
| 4 || +350 V || R-C decoupled from mainframe | | 4 || bgcolor="Pink" | +350 V || R-C decoupled from mainframe | ||
|- | |- | ||
| 5 || 6.3 V<sub>AC</sub> heater || from dedicated winding on mains transformer | | 5 || bgcolor="LightBlue" | 6.3 V<sub>AC</sub> heater || from dedicated winding on mains transformer | ||
|- | |- | ||
| 6 || 6.3 V<sub>AC</sub> heater || return for pin 5 | | 6 || bgcolor="LightBlue" | 6.3 V<sub>AC</sub> heater || return for pin 5 | ||
|- | |- | ||
| 7 || Alternate-trace sync pulse || from timebase | | 7 || bgcolor="LightGreen" | Alternate-trace sync pulse || from timebase | ||
|- | |- | ||
| 8 || not connected || | | 8 || not connected || | ||
|- | |- | ||
| 9 || Vertical signal input || 93 Ω impedance | | 9 || bgcolor="Yellow" | Vertical signal input || 93 Ω impedance | ||
|- | |- | ||
| 10 || Ground || | | 10 || Ground || | ||
|- | |- | ||
| 11 || /Vertical signal input || 93 Ω impedance | | 11 || bgcolor="Yellow" | /Vertical signal input || 93 Ω impedance | ||
|- | |- | ||
| 12 || 117 V<sub>AC</sub> || from ''primary side'' of mains transformer | | 12 || bgcolor="LightBlue" | 117 V<sub>AC</sub> || from ''primary side'' of mains transformer | ||
|- | |- | ||
| 13 || 117 V<sub>AC</sub> || return for pin 12 | | 13 || bgcolor="LightBlue" | 117 V<sub>AC</sub> || return for pin 12 | ||
|- | |- | ||
| 14 || Vertical signal input return || 93 Ω, terminated and biased in plug-in, galvanically connected to pin 9 | | 14 || bgcolor="Yellow" | Vertical signal input return || 93 Ω, terminated and biased in plug-in, galvanically connected to pin 9 | ||
|- | |- | ||
| 15 || +12.6 V from regulated heater supply | | 15 || bgcolor="Pink" | +12.6 V || from regulated heater supply | ||
|- | |- | ||
| 16 || /Vertical signal input return || 93 Ω, terminated and biased in plug-in, galvanically connected to pin 11 | | 16 || bgcolor="Yellow" | /Vertical signal input return || 93 Ω, terminated and biased in plug-in, galvanically connected to pin 11 | ||
|- | |- | ||
|} | |} | ||
===Pin group function legend=== | |||
:{| | |||
|- | |||
| bgcolor="Pink" | DC power | |||
and | |- | ||
| bgcolor="LightBlue" | AC and heater power | |||
|- | |||
| bgcolor="Yellow" | Deflection and Trigger Signals | |||
|- | |||
| bgcolor="LightGreen" | Control Signals | |||
|} | |||
==Used in== | ==Used in== | ||
'''Scopes''': | '''Scopes''': |