580 Series plug-in interface: Difference between revisions
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An unusual aspect of the 580 Series plug-in interface is transmission line termination scheme for its output signal. | An unusual aspect of the 580 Series plug-in interface is | ||
the transmission line termination scheme for its output signal. | |||
The output signal passes from the plug-in, through the plug-in interface connector, | The output signal passes from the plug-in, through the plug-in interface connector, | ||
through the first of two distributed amplifiers in the signal chain, and then back into the plug-in, | through the first of two distributed amplifiers in the 580-series mainframe's signal chain, | ||
which contains 93 Ω resistors to match the characteristic impedance of each side the balanced transmission line. | and then back into the plug-in, which contains 93 Ω resistors to match | ||
the characteristic impedance of each side the balanced transmission line. | |||
==Used in== | ==Used in== | ||
'''Scopes''': | '''Scopes''': | ||
Revision as of 12:35, 13 April 2018
The plug-in interface of the 580-series scopes is a single 16-pin Amphenol 26-series connector:
| 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 | from dedicated winding on mains transformer |
| 6 | 6.3 VAC heater | 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 |
An unusual aspect of the 580 Series plug-in interface is the transmission line termination scheme for its 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.
Used in
Scopes:
Plugins:
Pictures
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Type 80 plug-in
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Type 81A adapter plug-in
