S-52: Difference between revisions
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caption=S-52 head, front panel | | caption=S-52 head, front panel | | ||
series=[[3S2]], [[7S11]], [[7S12]] Sampling Plugins | | series=[[3S2]], [[7S11]], [[7S12]] Sampling Plugins | | ||
introduced= | introduced=1971 | | ||
discontinued=1990 | | discontinued=1990 | | ||
manuals= | manuals= |
Revision as of 11:41, 23 September 2014
The Tektronix S-52 is a pulse generator head compatible with S-series sampling units like the 3S2, 7S11, and 7S12.
It puts out a 200 mV pulse into a load of 50 Ω. The pulse has a rise time of 25 ps or less. The output is an SMA connector.
In addition to the main pulse output, the S-52 also produces a pre-trigger pulse 85 ns before the main pulse. The delay is generated with a digital counter, and jitter between the pre-trigger pulse and the main pulse is specified as less than 10 ps. The pre-trigger pulse uses a BSM connector.
The S-52 generates the main output pulse using a 50 mA low-capacitance tunnel diode with part number 153-0400-00.
The S-52 is similar to the S-50, but the S-50 has twice the pulse amplitude. The reason for this is that the S-52 has a 48 Ω resistor between the output tunnel diode and the output connector providing back termination, while the S-50 has no such resistor. Although the S-52 produces a smaller pulse, its output impedance is much better controlled than that of the S-50, and the output resistor may also provide some limited protection for the output tunnel diode.
Specifications
Key Specifications
Rise time | < 25 ps |
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Output amplitude | 200 mV into 50 Ω (SMA) |
Output impedance | 50 Ω «reverse terminated» (i.e. having controlled source impedance) |
Pre-trigger output | 85 ns before main pulse (jitter < 10 ps), +1 V into 50 Ω (BSM) |
Links
Pictures
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S-52 front
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S-52 pulse generator and S-6 sampling head in a 7S12 TDR/Sampler plugin
Internal
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A1 Timing board (right)
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A3 Trigger board (left)
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A2 Tunnel Diode Control board (center)
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Tunnel diode mount
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Tunnel diode mount, detail
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Schematic