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felipe  
#101 Posted : Saturday, December 29, 2012 12:18:11 PM(UTC)
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S/PDIF SE PIC LEGATO OUTPUT

S/PDIF SE

Edited by user Saturday, December 29, 2012 12:19:33 PM(UTC)  | Reason: Not specified

felipe  
#102 Posted : Saturday, December 29, 2012 12:22:28 PM(UTC)
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S/PDIF BAL LEGATO OUTPUT

S/PDIF BAL LEGATO OUTPUT
felipe  
#103 Posted : Saturday, December 29, 2012 12:24:52 PM(UTC)
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Originally Posted by: felipe Go to Quoted Post
The chip has come with the firmware. I attach two pics with oscilloscope shoots with a signal of 1 kHz to 0 dBs FS, the oscilloscopeis set in the range of 1 V/cm, it seems that the balanced signal is mas sluggishly(weakly) that the signal single end, it is correct this?

SE signal

Balanced signal


These pics taken with I2S input
felipe  
#104 Posted : Saturday, December 29, 2012 12:26:43 PM(UTC)
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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)  | Reason: Not specified

Russ White  
#105 Posted : Saturday, December 29, 2012 4:16:11 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)  | Reason: Not specified

felipe  
#106 Posted : Saturday, December 29, 2012 4:30:03 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)  | Reason: Not specified

felipe  
#107 Posted : Saturday, December 29, 2012 5:39:48 PM(UTC)
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Input I2S
Test Signal 1Khz square wave 0dBs FS
Output BIII single end

http://img716.imageshack.us/img716/7545/dsc00125x.jpg

UserPostedImage

Edited by user Saturday, December 29, 2012 5:45:16 PM(UTC)  | Reason: Not specified

felipe  
#108 Posted : Saturday, December 29, 2012 5:44:24 PM(UTC)
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Input I2S
Test Signal 1Khz square wave 0dBs FS
Output BIII balanced

UserPostedImage

UserPostedImage

Edited by user Saturday, December 29, 2012 5:46:06 PM(UTC)  | Reason: Not specified

felipe  
#109 Posted : Saturday, December 29, 2012 5:57:31 PM(UTC)
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Input S/PDIF
Test Signal 1Khz square wave 0dBs FS
Output BIII single end

UserPostedImage

UserPostedImage
felipe  
#110 Posted : Saturday, December 29, 2012 5:59:23 PM(UTC)
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Input S/PDIF
Test Signal 1Khz square wave 0dBs FS
Output BIII balanced


UserPostedImage

UserPostedImage

Edited by user Saturday, December 29, 2012 6:02:15 PM(UTC)  | Reason: Not specified

Russ White  
#111 Posted : Saturday, December 29, 2012 7:11:45 PM(UTC)
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is the firmware functioning? How are your switches setup?
Russ White  
#112 Posted : Saturday, December 29, 2012 7:16:52 PM(UTC)
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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)  | Reason: Not specified

felipe  
#113 Posted : Saturday, December 29, 2012 7:23:33 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
felipe  
#114 Posted : Saturday, December 29, 2012 7:27:32 PM(UTC)
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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)  | Reason: Not specified

Russ White  
#115 Posted : Saturday, December 29, 2012 7:37:34 PM(UTC)
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Have you checked the I2C signals to see if the firmware is working?
thanks 1 user thanked Russ White for this useful post.
felipe on 12/29/2012(UTC)
Russ White  
#116 Posted : Saturday, December 29, 2012 7:39:19 PM(UTC)
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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?
felipe  
#117 Posted : Saturday, December 29, 2012 7:49:02 PM(UTC)
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Originally Posted by: Russ White Go to Quoted Post
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.
felipe  
#118 Posted : Saturday, December 29, 2012 7:57:44 PM(UTC)
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Originally Posted by: Russ White Go to Quoted Post
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]UserPostedImage[/img]

[img]UserPostedImage[/img]

Only not detect SPDIF when I switch off the auto-detect by hardware I only do that to connect I2S.
Russ White  
#119 Posted : Sunday, December 30, 2012 12:01:56 AM(UTC)
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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.
felipe  
#120 Posted : Sunday, December 30, 2012 11:52:36 AM(UTC)
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How can check the DAC I2C input?
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