Distorted PMOD0_0 Waveform In QICK V0.2.298

The sudden appearance of a distorted pink waveform on PMOD0_0 during QICK 0.2.298 runs counter to expectations - previously clean, this signal now pulses with ringing and sluggish edges. Early signs include undershoot, overshoot, and slow rise times, detectable under oscilloscope. No physical setup changes correlate with the shift. This isn’t a cable or load glitch - traceable to timing or configuration.

This waveform reflects deeper timing or channel behavior in QICK’s tProcessor handling bit 0. Key factors include:

• Shifts in Drive Strength or Slew Rate settings, possibly misaligned with PMOD0_0’s tProc Trigger Output.
• Conflicts between tProc triggers and internal channel-level triggers (e.g., readout or buffer events) sharing the same trimod channel.
• Firmware-level timing adjustments that inadvertently disrupt signal integrity.

Safety first: avoid blindly blaming hardware - this is a software/hardware interaction issue. If using external triggers, double-check your bitmask and channel mapping. Misconfigured masks can overload tProcessor channels, causing signal degradation. Always verify bitmask consistency with the ZCU216’s tProc docs.

The bottom line: clean signals demand clean timing. Is your QICK config honoring PMOD0_0’s timing needs? Time to audit your bitmask, drive settings, and trigger conflicts - your signals depend on it.