UHF-CNT Key Features
- 4 counter modules
- 225 MHz maximum count rate
- 5 modes: manual, triggered, free, gated and pulse tagging
- 4 signal inputs with adjustable discriminator level
- Background subtraction using 2 counter modules
- Count integration
UHF-CNT Upgrade and Compatibility
- Option upgradeable in the field
- Compatible with all other UHF options
- Quantum optics
- Trapped ion experiments
- Diamond N/V center experiments
- Phosphorescence Lifetime Imaging (PLIM)
UHF-CNT Functional Diagram
The UHF-CNT Pulse Counter enables measurement of randomly distributed pulses and can operate with the following modes:
- Free running mode: the counter runs in repeated periods defined by the a configurable timer. At the beginning of each period the counter is reset, and at the end, the accumulated number of counts is output.
- Gated mode: the counter is controlled with the gate input signal. The counter is enabled at the rising edge of the gate input signal and disabled at the falling edge. The accumulated number of counts is output on the falling edge of the Gate Input signal.
- Gated free running mode: similar to the free running mode, but additionally the Gate Input signal controls when the counter is allowed to run. The counter as well as the timer is reset when the Gate Input signal is low.
- Time tagging: every single event is counted and transmitted to the host computer along with a time tag.
All modes feature background subtraction, i.e. taking into account measurement values from two separate counters, and count integration over time. Via the 1GbE or USB interface, the counter data can be streamed to the host PC where they can be analyzed using the LabOne toolset.
In combination with the UHF Arbitrary Waveform Generator the UHF-CNT features advanced cross-triggering functionality for complex pulsed experiments in quantum optics. Counters can be initiated and reset by the UHF AWG, and vice versa, counter values can serve as a trigger or branching conditions for the UHF AWG.
|signal inputs||4 Trigger Inputs, 32 DIO|
|# counter modules||4|
|counter value depth||32 bit (4.29 Gcounts)|
|maximum count rate||225 MHz|
|time resolution||4.44 ns|
|run modes||manual, triggered, free-running, gated, pulse-tagging|
|signal input impedance||50 Ω/1 kΩ|
|dead time between periods||<30 ns|
|signal input (discriminator) range||–2.5 V to +2.5 V (50 Ω input impedance)
–5 V to +5 V (1 kΩ input impedance)
|signal input (discriminator) resolution||<0.2 mV|
|signal input (discriminator) hysteresis||100 mV|