Firmware should not swap channels that way, at least I haven't seen it before. Therefore I would suggest to check some other things.
How are you measuring? With what instrument? On what pins? What do you measure if you send the Amanero some PCM audio? What if you send DSD audio?
How are you measuring? With what instrument? On what pins? What do you measure if you send the Amanero some PCM audio? What if you send DSD audio?
I'm mesuring with DVM Brymen BM869s http://www.brymen.com/PD02BM860s_869s.html
Red probe to Amanero pin 4 BCLK & black probe to Amanero pin 14 GND, DVM set AC displaying VAC RMS & Hz.
Tomorrow I will measure sending PCM & DSD, thanks Mark.
Red probe to Amanero pin 4 BCLK & black probe to Amanero pin 14 GND, DVM set AC displaying VAC RMS & Hz.
Tomorrow I will measure sending PCM & DSD, thanks Mark.
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The Brymen DVM can only measure and display frequencies up to 200kHz. That's not high enough to measure BCLK.
With the Amanero not powered I injected with the SG a sinus wave of 44kHz to the 2nd order LPF set to aprox. 20KHz and DVM not measured the 44KHz.
With Amanero powered I also injected the 44KHz signal to the LPF and DVM measured 22KHz....
With Amanero powered I also injected the 44KHz signal to the LPF and DVM measured 22KHz....
Depends what sample rate the Amanero is putting out. BCLK might only be a few MHz, so your scope might work.
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Looks like your scope probe is badly out of calibration. Is it set to x10?
Is the time scale 20us or .2s? The pic doesn't show the switch setting clearly.
Anyway, take the period of one full cycle and divide it into 1 (take 1/x). That should give the approximate frequency.
Is the time scale 20us or .2s? The pic doesn't show the switch setting clearly.
Anyway, take the period of one full cycle and divide it into 1 (take 1/x). That should give the approximate frequency.
Square wave looks better, thank you.
Sweep rate knob is out of focus. If you say its 20us/division, then let's use that number. So, maybe one cycle is about three and a half horizontal divisions. So that's about 70us for one cycle.
Taking 1/p where p is the time period for one cycle in units of seconds, gives somewhere roughly around 14kHz.
Sweep rate knob is out of focus. If you say its 20us/division, then let's use that number. So, maybe one cycle is about three and a half horizontal divisions. So that's about 70us for one cycle.
Taking 1/p where p is the time period for one cycle in units of seconds, gives somewhere roughly around 14kHz.