Stereo Tool

Hello,

I am able to get a green "Lock" in SFN mode successfully, however, when I try to activate audio delay measurement, the 1pps pulses immediately got lost.

Has anybody experienced a similar problem?

Before activating the delay measurement:



After activating the delay measurement:




Hardware is RPI4 + HifiBerry DAC+ ADC Pro. The 1pps signal if fed from the LEA-M8F GPS module (50% duty cycle) to the left input channel. The right input channel is connected to the right output channel for the loopback delay measurement. The measured delay varies from about 40 to about 60 ms after rebooting the RPI, so I definitely need to activate this feature.