Time Tagger Q420 is a single width PXIe module. It provides four count inputs and a fifth input for offset time tagging. The clock is locked to the 100MHz differential PXIe clock. The counts can be gated via the PXI trigger lines. Counts are returned over the PCIe bus to the main system memory and are accessible via an API.
| Features | Time Tagger Q420 provides timing resolution down to 31.25ps | |
| Applications | Photon Timing, QKD, Quantum computing, single-photon spectroscopy | |
| Specifications | Parameter | Value |
| Power | Triple | +3.3V, +5V +12 V from PXIe |
| Time-tagger Inputs | Voltage Type | 0.5-5V pulse |
| Resolution | 31.25ps | |
| Number | 4 Continuous timing inputs and 1 synchronisation or offset input | |
| Clock Sources | Differential | 100MHz PXIe bus clock |
| Trigger Input | PXIe trigger | Trigger 0-7 or can be star configuration |
| Connectors | External synch | SMA positive pin. Max 5V 10GHz |
| PCIe (XJ3 and XJ4) | 8 lane gen 3 PCIe | |
| Clock | 100MHz PXIe back plane clock | |
| Pulses | 4x SMA 50Ω terminated | |
| Dimensions (WxHxD) | 160 x 100 x 33 mm | |
| Weight | 300 g | |
| Storage Temp | -55 to 100 C | |
| Operating Temp | -40 to 85 C |
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Time Tagger Q400
Time Tagger Q400 is a PCIe ¾ length card that works within an x64 Linux computer. Four count inputs and a fifth input for a frame or synchronisation input.