E6486 User Manual

The QT60486 / QT60326 acquisition bursts CAN be synchronized to an external source of repetitive electrical noise, such as 50Hz or 60Hz using the Noise Sync feature, which is enabled via Setups. External repetitive signals are thereby heavily suppressed, since the system and the noise become synchronized and no longer beat or alias with respect to each other. The sync input triggers the burst for key 0 (X0Y0); the device waits for the sync signal for up to 100 ms after the end of a preceding full matrix scan (after key #47), then, when a sync pulse is received, the matrix is scanned in its entirety one time. If no sync pulse is received in 100ms, the part wakes on its own and re-scans the matrix one time then goes back to sleep. Sync pulses should be spaced no more than 99ms apart to prevent this from happening. By Quantum Research Group
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E6486 Application circuits
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