500 Series plug-in interface: Difference between revisions

Jump to navigation Jump to search

500 Series plug-in interface (view source)

Revision as of 14:47, 5 January 2021

1,587 bytes added ,  5 January 2021
Add instrument type to photo caption
(Add instrument type to photo caption)
(13 intermediate revisions by 3 users not shown)
Line 1: Line 1:
[[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|200px|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.
Line 13: Line 13:
|  1 || bgcolor="Yellow"    | +Signal            ||  100 mV/cm, bias +67.5 V ±2%
|  1 || bgcolor="Yellow"    | +Signal            ||  100 mV/cm, bias +67.5 V ±2%
|-  
|-  
|  2 ||                     | Ground            ||   
|  2 || bgcolor="Pink"      | Ground            ||   
|-  
|-  
|  3 || bgcolor="Yellow"    | −Signal            ||  100 mV/cm, bias +67.5 V ±2%
|  3 || bgcolor="Yellow"    | −Signal            ||  100 mV/cm, bias +67.5 V ±2%
|-  
|-  
|  4 || bgcolor="Yellow"    | Int Trig GND      ||  [[544]], [[546]], [[547]], [[549]], [[556]], late [[555]] only
|  4 || bgcolor="Yellow"    | Int Trig GND      ||  [[544]], [[546]], [[547]], [[549]],<br />[[556]], late [[555]] only
|-  
|-  
|  5 || bgcolor="Yellow"    | Int Trig +        ||  [[544]], [[546]], [[547]], [[549]], [[556]], late [[555]] only
|  5 || bgcolor="Yellow"    | Int Trig +        ||  [[544]], [[546]], [[547]], [[549]],<br />[[556]], late [[555]] only
|-  
|-  
|  6 || bgcolor="LightGreen" | Sawtooth          || [[556]] only, others n/c  
|  6 || bgcolor="LightGreen" | Sawtooth          || [[556]] only, others n/c  
Line 25: Line 25:
|  7 || bgcolor="LightGreen" | Slave Pulse out    ||  [[547]] only
|  7 || bgcolor="LightGreen" | Slave Pulse out    ||  [[547]] only
|-  
|-  
|  8 || bgcolor="LightGreen" | Multi-trace sync  ||  Cathode; grounded by [[CA]], [[M]] etc. in Alt Trace mode
|  8 || bgcolor="LightGreen" | Multi-trace sync  ||  Cathode; grounded by [[CA]],<br />[[M]] etc. in Alt Trace mode
|-  
|-  
|  9 || bgcolor="Pink"      |  −150 V            ||  min. 3.8 mA, max. 60 mA
|  9 || bgcolor="Pink"      |  −150 V            ||  min. 3.8 mA, max. 60 mA
Line 35: Line 35:
| 12 || bgcolor="Pink"      |  +350 V            ||  min. 0 mA, max. 20 mA
| 12 || bgcolor="Pink"      |  +350 V            ||  min. 0 mA, max. 20 mA
|-  
|-  
| 13 || bgcolor="LightBlue"  |  6.3 V<sub>AC</sub>    ||  plug-in AC heater supply, max. 2.8 A
| 13 || bgcolor="LightBlue"  |  6.3 V<sub>AC</sub>    ||  plug-in AC heater supply,<br />max. 2.8 A
|-  
|-  
| 14 || bgcolor="LightBlue"  |  6.3 V<sub>AC</sub>    ||  return for pin 13
| 14 || bgcolor="LightBlue"  |  6.3 V<sub>AC</sub>    ||  return for pin 13
|-  
|-  
| 15 || bgcolor="Pink"      |  +75 V            ||  min./max. 150 mA for DC series heaters and LV supply 
| 15 || bgcolor="Pink"      |  +75 V            ||  min./max. 150 mA for DC<br />series heaters and LV supply 
|-  
|-  
| 16 || bgcolor="LightGreen" | Multi-trace sync  ||  Anode
| 16 || bgcolor="LightGreen" | Multi-trace sync  ||  Anode
|}
|}


Line 48: Line 47:
:{|
:{|
|-
|-
| bgcolor="Pink"        |  DC power 
| bgcolor="Pink"        |  DC power and ground
|-
|-
| bgcolor="LightBlue"  |  AC and heater power 
| bgcolor="LightBlue"  |  AC and heater power 
Line 57: Line 56:
|}
|}


In early 500-series systems (e.g., a [[C|Type C]] plug-in in a [[535]] mainframe),
==Signal Input Impedance and Spoiler Switch Hole==
the mainframe's triggering is based on the main vertical signal
The input impedance of 500-series scopes presented to the plug-in at pins 1+3 is approximately kept constant by adding shunt capacitors at the input depending on the tube type used. Early, scopes like the [[536]] and the [[555]] use a [[12BY7]] differential amplifier in the input stage, and the plug-in is loaded with the grid input capacitance with 2x 27 Ω (555) or 47 Ω (536) in series. Later, medium speed scopes like the [[545B]] and the [[549]] use dual input followers with a [[6DJ8]] tubes and 2x 47 Ω in series at the grids, so to keep the plug-in loading approximately constant a 3.9 pF capacitor is placed across pins 1 and 3 in the scope.
sent by the plug-in to the mainframe on pins 1 and 3.
 
In these scopes,
High-speed scopes designed for 1-series plug-ins and up to 50 MHz bandwidth use a even lower input capacitance dual follower implemented with [[12AT7|12AT7s]] and series grid resistors of 22 Ω. For compatibility with older plugins designed for a higher capacitive load a series network of 7.5 pF and 82 Ω is shunted accross pins 1 and 3 by means of a switch. This spoiler switch is activated by all slower letter plugins. High speed plugins like the [[1A1]] have a hole in the back plate to allow for the switch plunger to pass through and access the full system bandwidth of the scope. Scopes and adapters known to use this spoiler switch are the [[544]], [[546]], [[547]], [[556]], and the [[81A]].
changing the vertical position control on the plug-in
 
==Internal Trigger signal==
 
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 (pins 1/3).
 
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 (e.g. [[547|Type 547]]), 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 with a separate trigger signal on pin 5 whose DC level is not affected by
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. In multi-trace setups, this allows consistent triggering from a specific  
This allows, in multi-trace setups, for the operator to consistently trigger from a specific input channel independent
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.
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
pin 1,3 (main vertical) output of the plug-in or the pin 5 (trigger signal) output.


In even later 500-series plug-ins (e.g., the [[1A4|Type 1A4]]),
For backward compatibility, the 547-era scopes have two types of INT triggering, taking the trigger
the plug-in has a knob for the selection of which input channel's signal
signal either from the main vertical plug-in output (1/3), or the trigger output (5).
will be sent to the mainframe as the trigger signal.


Although the Type 1A1 has two input channels, they are not identical - the pin 5 internal trigger
signal is always taken from channel 1.  Even later 500-series plug-ins (e.g., the [[1A4|Type 1A4]]),
have a knob for the selection of which input channel's signal supplies the trigger signal.
|}


==Pictures ==
<gallery>
<gallery>
Pluginpinout556.png                | pinout shown in [[556]] schematic
Pluginpinout556.png                | pinout shown in [[556]] schematic
040-0065-00 p4.jpg                | pinout listed in [[040-0065-00]] kit docs
040-0065-00 p4.jpg                | pinout listed in [[040-0065-00]] kit docs
Tek letter-series pinout.png      | pinout shown in [[1A2]] schematic
Tek letter-series pinout.png      | pinout shown in [[1A2]] schematic
544_vertical_amp_input.GIF        | [[544]] vertical amplifier input with spoiler switch SW1000
500-series connector male front.jpg| Male pins on plugin
500-series connector male front.jpg| Male pins on plugin
500-series connector male rear.jpg | Rear lugs on plugin
500-series connector male rear.jpg | Rear lugs on plugin
Tek_k_1498_6.jpg | Back plate of [[K]] plug-in without spoiler hole
Late_tek_type_j_rear.jpg | Back plate of [[1A1]] plug-in with spoiler hole (circular hole right of 16-pin Amphenol connector)
</gallery>
</gallery>




[[Category:Plug-in interfaces]]
[[Category:Plug-in interfaces]]
Vintage dave
282

edits

Retrieved from "https://w140.com/tekwiki/wiki/Special:MobileDiff/36291...58444"

Navigation menu