2118-2128: add min pulse width spec
Especially test reuslt that validate the "minimum 3ns pulse width" claim.
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@ -347,6 +347,7 @@ The card support a minimum pulse width of 3ns.
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All specifications are in $0\degree C \leq T_A \leq 70\degree C$ unless otherwise noted.
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Specifications are based on the bus transceivers IC (SN74BCT25245DW\footnote{\label{transceiver}https://www.ti.com/lit/ds/symlink/sn74bct25245.pdf})
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and the isolator IC (SI8651BB-B-IS1\footnote{\label{isolator}https://www.skyworksinc.com/-/media/Skyworks/SL/documents/public/data-sheets/si865x-datasheet.pdf}).
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The typical value of minimum pulse width is based on test results\footnote{\label{sinara187}https://github.com/sinara-hw/sinara/issues/187}.
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\begin{table}[h]
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\begin{threeparttable}
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@ -385,6 +386,8 @@ and the isolator IC (SI8651BB-B-IS1\footnote{\label{isolator}https://www.skywork
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Low-level output voltage\repeatfootnote{transceiver} & $V_{OL}$ & & 0.42 & 0.55 & V & $I_{OL}$=188mA \\
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& & & & 0.7 & V & $I_{OL}$=376mA \\
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\hline
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Minimum pulse width\repeatfootnote{isolator}\textsuperscript{,}\repeatfootnote{sinara187} & & & 3 & 5 & ns & \\
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\hline
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Pulse width distortion\repeatfootnote{isolator} & $PWD$ & & 0.2 & 4.5 & ns & \\
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\hline
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Peak jitter\repeatfootnote{isolator} & $T_{JIT(PK)}$ & & 350 & & ps & \\
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@ -397,6 +400,23 @@ and the isolator IC (SI8651BB-B-IS1\footnote{\label{isolator}https://www.skywork
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\newpage
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Minimum pulse width was measured\repeatfootnote{sinara187}.
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Pulses were generated from a DDS generator as an input of a BNC-TTL card.
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The input BNC-TTL card is connected to another BNC-TTL card as an output.
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The output signal is measured and shown.
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\begin{figure}[h]
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\centering
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\includegraphics[height=3in]{bnc_ttl_min_pulse_width.png}
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\caption{Minimum pulse width required for BNC-TTL card}
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\end{figure}
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The red trace refers to the input pulses from the DDS generator, while the blue trace is the measured signal from the output BNC-TTL card.
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Note that the first input (red) pulse could not propagate through the signal chain.
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The first output (blue) pulse is the result of the second input (red, 3ns width) pulse.
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\newpage
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\section{Front Panel Drawings}
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\begin{multicols}{2}
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