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Old 26th February 2014, 10:09 PM   #941
acko is online now acko  Australia
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Quote:
Originally Posted by manudrz View Post
.... I see many voltages inputs, what does it really need ?
These are options for you to source them from separate power supplies if you wish to but in most cases a single 5V supply would suffice.

There is also an external 5V supply option for the Amanero so that the PC usb supply is not used.
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Old 26th February 2014, 10:29 PM   #942
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Quote:
You could use it with B3SE if you can disable the on board XO.
You only need not power the XO (it has it's own regulator).
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Old 26th February 2014, 11:19 PM   #943
acko is online now acko  Australia
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Thanks Brian!

Of course, you can still have B3 XO enabled and use it in asynchronous mode and compare
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Old 27th February 2014, 05:13 AM   #944
RollE2k is offline RollE2k  Sweden
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By the way.. can the adp-regs take 5.25v input rather than 5v? Looks like that from the datasheet - but then i don't know current needs...
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Old 1st March 2014, 04:18 PM   #945
manudrz is offline manudrz  France
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Ok, thanks for the answers. Does it come with a manual or documentation ? I think I'll wait someone to test it before me
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Old 2nd March 2014, 02:22 AM   #946
DQ828 is offline DQ828  Australia
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Quote:
Originally Posted by acko View Post
Thanks Brian!

Of course, you can still have B3 XO enabled and use it in asynchronous mode and compare
Iv'e struggled with what "asynchronous mode"actually means is happening in the signal path. I have read various definitions, Wikipedia has several, but it's no clearer in my mind.

Any chance of having a go at explaining it to me?
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Old 2nd March 2014, 10:03 AM   #947
acko is online now acko  Australia
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Originally Posted by RollE2k View Post
By the way.. can the adp-regs take 5.25v input rather than 5v? Looks like that from the datasheet - but then i don't know current needs...
No problems with 5.25V. Current drawn is well below the max limit of the LDO but i will do some measurements for you later.
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Old 3rd March 2014, 08:17 PM   #948
DQ828 is offline DQ828  Australia
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Quote:
Originally Posted by DQ828 View Post
Iv'e struggled with what "asynchronous mode"actually means is happening in the signal path. I have read various definitions, Wikipedia has several, but it's no clearer in my mind.

Any chance of having a go at explaining it to me?
Well I'm glad I'm not the only one who doesn't know what it means
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Old 4th March 2014, 01:41 AM   #949
acko is online now acko  Australia
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Originally Posted by DQ828 View Post
Iv'e struggled with what "asynchronous mode"actually means is happening in the signal path. I have read various definitions, Wikipedia has several, but it's no clearer in my mind.

Any chance of having a go at explaining it to me?
Async mode for this case means the DAC master clock and transport clock are completely independent of each other.The default build of BIIIs is Async as it has the Crystek XO mounted and enabled. So the I2S signals and its clock from transport are running freely on their own. If you have a 2CH scope and monitor the clock/signals you can only trigger onto one of them - the other channel appears running around (async behaviour)

The default build of my own DACs is for Synchronous operation. XO is not mounted and this means you will need to source DAC master clock elsewhere and usually from the transport. This puts the DAC and Transport I2S signals in Sync mode as the source of clocks are the same. On a scope, triggering onto any one of the signals also locks onto the others as well (sync behaviour)

Of course, as what Brian explained you can get the BIIIs in Sync mode by disabling the the on-board XO (unpower it) and then pipe in the external clock from transports like from the S03 board.


Hope this helps
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Old 4th March 2014, 07:05 AM   #950
DQ828 is offline DQ828  Australia
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Quote:
Originally Posted by acko View Post
Async mode for this case means the DAC master clock and transport clock are completely independent of each other.The default build of BIIIs is Async as it has the Crystek XO mounted and enabled. So the I2S signals and its clock from transport are running freely on their own. If you have a 2CH scope and monitor the clock/signals you can only trigger onto one of them - the other channel appears running around (async behaviour)

The default build of my own DACs is for Synchronous operation. XO is not mounted and this means you will need to source DAC master clock elsewhere and usually from the transport. This puts the DAC and Transport I2S signals in Sync mode as the source of clocks are the same. On a scope, triggering onto any one of the signals also locks onto the others as well (sync behaviour)

Of course, as what Brian explained you can get the BIIIs in Sync mode by disabling the the on-board XO (unpower it) and then pipe in the external clock from transports like from the S03 board.


Hope this helps
Thank you, a lot clearer.
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