Build Thread for TPA BIII + Ian Async I2S FIFO + OPC NTD1 + Salas SSLV - Page 43 - diyAudio
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Old 7th January 2013, 11:10 PM   #421
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I measured at the BCLK output and after the resistor.
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Old 9th January 2013, 02:48 PM   #422
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I remeasure both clock and they both swing from 0.5V to 2.3V which should be able to trigger the FF, but still no output
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Old 12th January 2013, 09:01 AM   #423
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Fed a 1.9V 5MHz square wave with 2V DC offset to the CLK input of FF, output from Q. That prove all wiring correct. But still not output when connect to oscillator????
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Old 12th January 2013, 03:43 PM   #424
glt is offline glt  United States
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Have you measured the 3.3v supply voltage while playing music?
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Old 13th January 2013, 02:02 AM   #425
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I've measured the 3.3V and found very high level noise. Followed your Mod and added two capacitors at the input of the LDOs. Noise reduced significantly and SQ also improved. But the FF still not work
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Old 13th January 2013, 05:54 AM   #426
glt is offline glt  United States
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Good to hear about the caps. But sorry to hear that the FF is still not working. Have you measured the clocks without the FF connected? There is no way the clocks have such low voltage if VDD is 3.3v
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Old 13th January 2013, 06:02 AM   #427
qusp is offline qusp  Australia
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Might I suggest you get one of acko's amanero isolator/reclocker PCBs
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Old 13th January 2013, 07:06 AM   #428
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Thanks, just added my name in the GB list.
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Old 13th January 2013, 07:07 AM   #429
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Quote:
Originally Posted by glt View Post
Good to hear about the caps. But sorry to hear that the FF is still not working. Have you measured the clocks without the FF connected? There is no way the clocks have such low voltage if VDD is 3.3v
The clocks are the same with and without FF
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Old 22nd January 2013, 02:08 AM   #430
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Did you fix you s/pdif problem?
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