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Sampling diodes: Difference between revisions
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gear or replacements can be improvised using modern parts. [[Hewlett-Packard|HP/Avago]] and now Broadcom makes integrated pairs and quads of high-speed Schottky diodes (e.g. HSMS-28xx series). These are a decent replacement for the original diodes. | gear or replacements can be improvised using modern parts. [[Hewlett-Packard|HP/Avago]] and now Broadcom makes integrated pairs and quads of high-speed Schottky diodes (e.g. HSMS-28xx series). These are a decent replacement for the original diodes. | ||
== Possible modern substitutes == | |||
== modern | |||
{| class="wikitable" | {| class="wikitable" | ||
|- | |- | ||
! Type of Diode | ! Type of Diode | ||
! | ! Tek sampler | ||
! | ! Measured rise time | ||
! | ! Remarks | ||
|- | |- | ||
| HSMS2822 || [[4S1]] | | HSMS2822 || [[4S1]] || 320 ps || better than specification and very smooth trace | ||
|- | |- | ||
| HSMS2822 || [[S-2]] | | HSMS2822 || [[S-2]] || 120 ps || didn't match original specification | ||
|- | |- | ||
| MMDL301 || [[S-2]] || 185 ps || | | MMDL301 || [[S-2]] || 185 ps || high blow-by, not recommended | ||
|- | |- | ||
| BAT1704 || [[S-2]] || 110 ps || | | BAT1704 || [[S-2]] || 110 ps || didn't match original specification, but very smooth trace | ||
|- | |- | ||
|} | |} | ||
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<gallery> | <gallery> | ||
4S1_w_hsms2822_modified.JPG | 4S1 | 4S1_w_hsms2822_modified.JPG | 4S1 Sampling diode replaced by Avago HSMS2822 | ||
</gallery> | </gallery> | ||