GX-TXT-v3 tests with a real photodiode and IR remote reveal the 38 kHz carrier, burst timing, and NEC-family protocol.
GX-TXT-v3 testing shows how pulse count affects HOLD-node charging, LED turn-on threshold, and indication time.
GX-TXT-v3 sensitivity and threshold testing, following QIN, HOLD and orange LED behavior across gain and sensitivity settings.
GX-TXT-v3 testing with a virtual photodiode: VIR measurements, preamplifier gain, probe loading and LTspice comparison.
GX-TXT-v3 DC bias measurements, current consumption and NE555 timer verification compared with LTspice simulation.