How to trigger an SPCM?


I am using an AWG DG1022Z to generate 5V TTL signal with 50% duty cycle to trigger SPCM-800-12-FC30139. But I do not see any changes in the total amount of my photon number counts. I wondering if I did it wrong…

Kind regards
Yang Yang


We are checking on this and will post as soon as we have any information.

For the gating function to work, when you drive the gate connector to 0V, your driver needs to be able to sink approx. 100mA of current that will come from the SPCM gate connector. If your driver cannot do this, the gate will not close and the module will be continuously counting, which is what appears to be happening.