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|Timestamps transfer modes| DMA on SPEC, FIFO on SVEC|
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|Timestamps precision (deviation)|**± 700 ps**<br/>Outliers of ±4 ns are observed at the expected frequency of ~ 1 outlier/10M measurements.<br/>More information at [Board Performance documents](https://www.ohwr.org/project/fmc-tdc/wikis/board-performance).|
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|Timebase accuracy|With White Rabbit: **< 1ns**<br/>Without White Rabbit: **± 4 ppm** from a local TCXO on the FMC card|
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|Maximum input pulse rate|**5 MHz/channel** in burst- of 5k samples, DMA mode; CPU & application dependent|
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|Maximum input pulse rate|**Burst:** 5 MHz burst of 5k samples in DMA mode;<br/> **Continuous mode:** up to 200KHz on 3GHz CPU;<br/> Please note the performance is highly dependent on CPU & application|
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|Timestamps|Timestamps apply only to **rising edges** of incoming pulses;<br/>on the gateware level the falling edges are used for the calculation of the pulse width, ignoring pulses < 96 ns;<br/> With White Rabbit, the TDC offers **absolute timestamping** and timestamps from different boards in the same White Rabbit network can be correlated.<br/>Without White Rabbit the timestamps from one board need to be always **subtracted** between them, to calculate time differences|
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|Minimum input pulse width|**96 ns**, narrower pulses are ignored on gateware level|
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|ACAM mode|**I-mode**, 81ps resolution, +/- 500ps precision (6σ)|
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