580 Series plug-in interface: Difference between revisions

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[[File:580 series plugin interface.png|thumb|350px|right|click to enlarge]]
[[File:580 series plugin interface.png|thumb|350px|right|click to enlarge]]


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
An unusual aspect of the 580 Series plug-in interface is
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|  4 || bgcolor="Pink"        | +350 V  || R-C decoupled from mainframe  
|  4 || bgcolor="Pink"        | +350 V  || R-C decoupled from mainframe  
|-  
|-  
|  5 || bgcolor="LightBlue"  | 6.3 V<sub>AC</sub> heater || from dedicated winding on mains transformer
|  5 || bgcolor="LightBlue"  | 6.3 V<sub>AC</sub> || heater supply from dedicated winding on mains transformer
|-  
|-  
|  6 || bgcolor="LightBlue"  | 6.3 V<sub>AC</sub> heater || return for pin 5
|  6 || bgcolor="LightBlue"  | 6.3 V<sub>AC</sub> || heater supply return for pin 5
|-  
|-  
|  7 || bgcolor="LightGreen"  | Alternate-trace sync pulse || from timebase  
|  7 || bgcolor="LightGreen"  | Alternate-trace sync pulse || from timebase  
Line 32: Line 32:
|  8 || not connected ||&nbsp;
|  8 || not connected ||&nbsp;
|-  
|-  
|  9 || bgcolor="Yellow"      | Vertical signal input || 93 Ω impedance
|  9 || bgcolor="Yellow"      | +Vertical signal input || 93 Ω impedance
|-  
|-  
| 10 || Ground                ||&nbsp;
| 10 || bgcolor="Pink"        | Ground                ||&nbsp;
|-  
|-  
| 11 || bgcolor="Yellow"      | /Vertical signal input  || 93 Ω impedance
| 11 || bgcolor="Yellow"      | −Vertical signal input  || 93 Ω impedance
|-  
|-  
| 12 || bgcolor="LightBlue"  | 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
Line 42: Line 42:
| 13 || bgcolor="LightBlue"  | 117 V<sub>AC</sub> || return for pin 12  
| 13 || bgcolor="LightBlue"  | 117 V<sub>AC</sub> || return for pin 12  
|-  
|-  
| 14 || bgcolor="Yellow"      | 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 || bgcolor="Pink"        | +12.6 V ||  from regulated heater supply &nbsp;
| 15 || bgcolor="Pink"        | +12.6 V ||  from regulated heater supply &nbsp;
|-  
|-  
| 16 || bgcolor="Yellow"      | /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
|-  
|-  
|}
|}
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:{|
:{|
|-
|-
| bgcolor="Pink"        |  DC power 
| bgcolor="Pink"        |  DC power and ground
|-
|-
| bgcolor="LightBlue"  |  AC and heater power 
| bgcolor="LightBlue"  |  AC and heater power 

Latest revision as of 05:20, 2 September 2018

click to enlarge

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 amplifiers 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.

Pin Function Comment
1 −150 V R-C decoupled from mainframe
2 +100 V R-C decoupled from mainframe
3 +225 V R-C decoupled from mainframe
4 +350 V R-C decoupled from mainframe
5 6.3 VAC heater supply from dedicated winding on mains transformer
6 6.3 VAC heater supply return for pin 5
7 Alternate-trace sync pulse from timebase
8 not connected  
9 +Vertical signal input 93 Ω impedance
10 Ground  
11 −Vertical signal input 93 Ω impedance
12 117 VAC from primary side of mains transformer
13 117 VAC return for pin 12
14 +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  
16 −Vertical signal input return 93 Ω, terminated and biased in plug-in, galvanically connected to pin 11

Pin group function legend

 DC power and ground
 AC and heater power 
 Deflection and Trigger Signals 
 Control Signals 

Used in

Scopes:

Plugins:

Pictures

  • Type 80 plug-in

    Type 80 plug-in

  • Type 81A adapter plug-in

    Type 81A adapter plug-in

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