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S/PDIF SE PIC LEGATO OUTPUT  Edited by user Saturday, December 29, 2012 12:19:33 PM(UTC)
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S/PDIF BAL LEGATO OUTPUT 
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These pics taken with I2S input
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It seems I2S have half output than S/PDIF & SE signals have half output than SE!!!!! Edited by user Saturday, December 29, 2012 12:31:26 PM(UTC)
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felipe - I am trying hard - but it is very hard to follow your posts... I have no idea exactly what the test conditions are and how you have your DAC setup. if the firmware is working (easy to vefify by observing I2C signal with your scope) and the DAC jumpers are correct. Then the DAC will work as designed as long as it has not been damaged. You should be checking the output of the DAC itself first - not the Legato. It could be that the Legato itself is damaged. Edited by user Saturday, December 29, 2012 4:17:32 PM(UTC)
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I'm sorry, English isn't my native language, I try to explain me better: I used WaveIO USB-I2S also with S/PDIF output, ths scope mesures shows that I have I2S haves half the signal S/PDIF, I mind it's not Legato problem because I2S & S/PDIF was measured with 1kHz 0dBs FS, that's demonstrate to me that the problem is the BIII, any suggestion to fix? About the difference between SE & Balanced signal can be the Legato, any idea to fix? I am really very angry, if you can not help me on-line, .I send you back both devices in order that you fix the problems. With the rest of devices (and they are a lot of) that I bought you I haven't had so many problems as with the BIII and the Legato without caps. Waiting that you understand my position. Felipe Edited by user Saturday, December 29, 2012 4:30:50 PM(UTC)
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Input I2S Test Signal 1Khz square wave 0dBs FS Output BIII single end   Edited by user Saturday, December 29, 2012 5:45:16 PM(UTC)
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Input I2S Test Signal 1Khz square wave 0dBs FS Output BIII balanced   Edited by user Saturday, December 29, 2012 5:46:06 PM(UTC)
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Input S/PDIF Test Signal 1Khz square wave 0dBs FS Output BIII single end  
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Input S/PDIF Test Signal 1Khz square wave 0dBs FS Output BIII balanced   Edited by user Saturday, December 29, 2012 6:02:15 PM(UTC)
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is the firmware functioning? How are your switches setup?
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also -to properly measure balanced signals you need to combine two channels and view the difference. If your scope setup for that? I only see two clips. There should be 4 (or possibly 3). Also you need to be sure your scope can handle the common mode DC. Most cannot. Edited by user Saturday, December 29, 2012 7:22:40 PM(UTC)
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SW1
1 off
2 off
3 off
4 on
5 on
6 on
7 on
8 off
SW2
1 off
2 off
3 off
4 off
5 on
6 off
7 off
8 on
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I need a second probe? I have now only one probe on hand. I posted only the measurements of right channel, I measured also left channel and measurments are like the pics posted of right channel. Edited by user Saturday, December 29, 2012 7:32:28 PM(UTC)
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Have you checked the I2C signals to see if the firmware is working?
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 1 user thanked Russ White for this useful post.
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Can you shoot a picture of the switches and controller header.
Also if you turn off SPDIF detection does it still lock onto SPDIF?
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Originally Posted by: Russ White  Have you checked the I2C signals to see if the firmware is working? How can check the I2S signal? I connected the I2S signals between WaveIO & BIII, you can show the pics.
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Originally Posted by: Russ White Can you shoot a picture of the switches and controller header.
Also if you turn off SPDIF detection does it still lock onto SPDIF? [img]  [/img] [img]  [/img] Only not detect SPDIF when I switch off the auto-detect by hardware I only do that to connect I2S.
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If when you switch off SPDIF auto detection it is still detecting SPDIF there there are at least two possibilitites:
1) the DAC I2C input (not I2S) is damaged... this is not very likely, but possible.
2) the micro controller is not working (not likely since it was just replaced).
one other remote possibility is that the port expander has been damaged... But this does not seem likely as it is only configured for input.
In any case it sounds as if your DAC is not being programmed... Either because it is damaged, or something else is interfering with its operation.
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How can check the DAC I2C input?
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