5T1A: Difference between revisions
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The Tektronix 5T1A is a timing plug-in for the [[661]] sampling oscilloscope. | |||
The job of the 5T1A is to produce three signals: | |||
the sampling pulse, the horizontal sweep, and the blanking signal. | |||
The input to the 5T1A is a trigger signal. The trigger can arrive | |||
from any of four sources: | |||
* internally from the trigger pick-off in a [[4S1]] plug-in | |||
* externally via a GR-874 connector on the front panel of the 5T1A | |||
* from the calibration oscillator in the 661, via the muliti-pin plug-in connector | |||
* free-running | |||
Each of these modes is suited to some measurement scenarios. | |||
In the case of internal triggering, the signal goes from the trigger pick-off | |||
in the 4S1 to a coaxial interconnect that passes | |||
through the 661, connecting the sampling unit to the timing unit. | |||
Triggering in the 5T1A is accomplished using five [[1N3129]] 20mA tunnel diodes. | |||
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Image:5t1a front.jpg | Image:5t1a front.jpg | ||
Revision as of 14:02, 1 July 2010
The Tektronix 5T1A is a timing plug-in for the 661 sampling oscilloscope. The job of the 5T1A is to produce three signals: the sampling pulse, the horizontal sweep, and the blanking signal. The input to the 5T1A is a trigger signal. The trigger can arrive from any of four sources:
- internally from the trigger pick-off in a 4S1 plug-in
- externally via a GR-874 connector on the front panel of the 5T1A
- from the calibration oscillator in the 661, via the muliti-pin plug-in connector
- free-running
Each of these modes is suited to some measurement scenarios. In the case of internal triggering, the signal goes from the trigger pick-off in the 4S1 to a coaxial interconnect that passes through the 661, connecting the sampling unit to the timing unit.
Triggering in the 5T1A is accomplished using five 1N3129 20mA tunnel diodes.
<gallery> Image:5t1a front.jpg Image:5t1a right.jpg Image:5t1a left.jpg Image:5t1a top.jpg Image:5t1a bottom.jpg Image:5t1a coax interconnect.jpg Image:5t1a rear connector.jpg <gallery>