The phrase "activated by a single" is correct and usable in written English.
It can be used in contexts where something is triggered or initiated by one specific element or factor.
Example: "The device is activated by a single press of the button."
Alternatives: "triggered by one" or "initiated by a single".
Two SAW devices with different center frequencies were simultaneously activated by a single antenna with double resonant frequencies.
Some pilots said they were concerned the system could be activated by a single inaccurate sensor, pushing the plane toward the ground right after takeoff, when the margin for error was thin.
Likewise for the macro management software – you can set up macros based on mouse movements, clicks and keys that can be activated by a single click.
To further simplify movie shooting, Live View is activated by a single dedicated switch, and HD video recording is achieved by pressing a single button.
Another concern of automakers is that the driver might inadvertently shut down the engine if power buttons can be activated by a single momentary touch.
But instead, driving in FFXV extends to holding down the right trigger to accelerate and letting the vehicle steer itself, with U-turns and parking automated animations activated by a single face button.
Based on our results for predicting H1N1 screen hits (Table 1), we again consider only the top-ranked paths and allow targets to be activated by any single source.
Oocytes were transferred to an activation solution consisting of 0.3 M mannitol (Nacalai Tesque, Kyoto, Japan), 50 µM CaCl2, 100 µM MgCl2, and 0.01% (w/v) PVA, and activated by applying a single direct current pulse (150 V/mm, 100 µsec) using an electrical pulsing machine (LF201; Nepa Gene, Chiba, Japan).
In the Lion Air crash, the system was activated by a reading from a single faulty sensor that had been improperly repaired after incidents on earlier flights.
The system was activated by a reading from a single faulty angle-of-attack sensor that had been improperly repaired after incidents on earlier flights.
Single VGSCs were activated by a depolarization pulse (60 ms) and recorded on the soma and axonal bleb of the same neurons in cell-attached model simultaneously.
