... | @@ -38,11 +38,12 @@ programmable interrupts implemented based on the number of accumulated timestamp |
... | @@ -38,11 +38,12 @@ programmable interrupts implemented based on the number of accumulated timestamp |
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</tr>
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</tr>
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<tr class="odd">
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<tr class="odd">
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<td>Timestamps precision (deviation)</td>
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<td>Timestamps precision (deviation)</td>
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<td><strong>+/- 700 ps</strong></td>
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<td><strong>± 700 ps</strong></td>
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</tr>
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</tr>
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<tr class="even">
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<tr class="even">
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<td>Timebase accuracy</td>
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<td>Timebase accuracy</td>
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<td><strong>+/- 4 ppm</strong> from a local TCXO on FMC card; much better accuracy would be reached when used on a White Rabbit enabled FMC carrier</td>
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<td>With White Rabbit: *< 1ns*<br />
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Without White Rabbit: <strong>± 4 ppm</strong> from a local TCXO on the FMC card</td>
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</tr>
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</tr>
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<tr class="odd">
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<tr class="odd">
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<td>Maximum input pulse rate</td>
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<td>Maximum input pulse rate</td>
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... | @@ -55,7 +56,8 @@ programmable interrupts implemented based on the number of accumulated timestamp |
... | @@ -55,7 +56,8 @@ programmable interrupts implemented based on the number of accumulated timestamp |
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<td>Timestamps</td>
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<td>Timestamps</td>
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<td>Timestamps apply to both <strong>rising and falling edges</strong> of incoming pulses;<br />
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<td>Timestamps apply to both <strong>rising and falling edges</strong> of incoming pulses;<br />
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on the software level the falling edges are only used for the calculation of the pulse width, ignoring pulses < 100 ns;<br />
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on the software level the falling edges are only used for the calculation of the pulse width, ignoring pulses < 100 ns;<br />
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the rising edges are always subtracted between them</td>
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With White Rabbit, the TDC offers <strong>absolute timestamping</strong> and timestamps from different boards in the same White Rabbit network can be correlated between them<br />
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Without White Rabbit the timestamps from one board need to be always <strong>subtracted</strong> between them, to calculate time differences</td>
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</tr>
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</tr>
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<tr class="even">
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<tr class="even">
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<td>Minimum input pulse width</td>
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<td>Minimum input pulse width</td>
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