Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter

Hi all.
I am using the FiFoPi but taking out the SCK LR/DO and SD/D1.
I have had a bit of a read about the U.FL cables.
Have i got this right?
I want as short as possible, but the longer I go, the thicker I want.
as in rg178. Which should be 1.78mm right?
Are there any thoughts as to a max i could go without any negative affects?
I am thinking kind of 15cm to allow some flexibility in the build.
Am I right in thinkinng that these are right?
https://www.aliexpress.com/item/100...916520917158496591e7d0e!12000022225213669!sea
 
I use the DDDAC and have the setup as follows: USB out from Streamer, WAVEIO USB to I2S board, WaveIO to FIFOPi/ReclockPi with Accusilicon clocks and I2S in to the DDDAC mainboard.

I would like to eliminate the USB connection and go straight I2S into the FifoPi/ReclockPi. Is there a way to implement this using any of Ian's other products or by using a DDC such as Gustard U18, to which I can provide a USB in and take the I2S out from it? Is there a way to configure an HDMI cable to provide an I2S directly to the FifoPi/ReclockPi combo?

Apologies if these are very simple of basic questions but I am not able to figure this out.
 
20220403_124829.jpg

I have a load of these little boards that came from gerbers on Miro's 1862 thread. Bare PCBs so need u.fl and 8 way headers.
This one is hacked to link the grounds. PM if you need any
 
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I used the small Miro1360 board to feed the DAC from Ian's Fifo. Fifo has 3 u.fl as uses the outer of the coax as ground. There is a 4x2 header on the underside nof the small green board and the ground needs to use 4th 'port' of the header for ground to DAC. So I tried the u.fl grounds together with the wire to connect to this 4th connector
 
Hello everyone,

I need some help as I am not able to make the Sinepi work with an external FOS-3 device.

My setup:
RPI4-->ConditionerPI-->FifoPi Q3 Ultimate-->ReclockerPI-->HDMI LVDS Transmitter MK2
I am powering the 5V on Conditioner PI and 3.3V on the FifoPI from an HDPLEX 300.

I have used successfully Accsilicons with the above config. I am trying now to replace the Accusilicons with 44.1 and 49MHz provided from the FOS3 to Sinepi.
SinePI is installed replacing the two Accusilicons, using exact same configuration for u.fl cables. I have no sound out. What I have noticed is if I turn off
the FOS-3 the relay switches continuously - this would mean that there was a lock and without there is no lock (so the clock is provided and locked with FOS-3)?
Attached the u.fl cable cable configuration used (successfully with Accusilicons and unsuccessfully with FOS-3)
FOS-3 characteristics according to the manufacturer:
  • OUT1 output frequency: 44.1k-88.2k-176.4k-352.8k-48k-96k-192k-384k-8.4672M-11.2896M-16.9344M-33.8688M
  • OUT2 output frequency: 44.1k-88.2k-176.4k-352.8k-48k-96k-192k-384k-8.4672M-11.2896M-16.9344M-33.8688M
  • 10MHz port output frequency: 10MHz
  • Output waveform: 3-channels 3.3Vpp square wave
  • Output impedance: compatible with 50 ohms and 75 ohms at the same time

I am using two of these coaxial cables from Digikey (15cm):
PART: ACX2042-ND
MFG : Amphenol RF / 245101-04-06.00

Ian mentioned at some point that "a SinePi can take both sine input and square input". Is this really the case?

Am I missing anything? Any ideas?
ufl config.jpg
 
Hello everyone,

I need some help as I am not able to make the Sinepi work with an external FOS-3 device.

My setup:
RPI4-->ConditionerPI-->FifoPi Q3 Ultimate-->ReclockerPI-->HDMI LVDS Transmitter MK2
I am powering the 5V on Conditioner PI and 3.3V on the FifoPI from an HDPLEX 300.

I have used successfully Accsilicons with the above config. I am trying now to replace the Accusilicons with 44.1 and 49MHz provided from the FOS3 to Sinepi.
SinePI is installed replacing the two Accusilicons, using exact same configuration for u.fl cables. I have no sound out. What I have noticed is if I turn off
the FOS-3 the relay switches continuously - this would mean that there was a lock and without there is no lock (so the clock is provided and locked with FOS-3)?
Attached the u.fl cable cable configuration used (successfully with Accusilicons and unsuccessfully with FOS-3)
FOS-3 characteristics according to the manufacturer:
  • OUT1 output frequency: 44.1k-88.2k-176.4k-352.8k-48k-96k-192k-384k-8.4672M-11.2896M-16.9344M-33.8688M
  • OUT2 output frequency: 44.1k-88.2k-176.4k-352.8k-48k-96k-192k-384k-8.4672M-11.2896M-16.9344M-33.8688M
  • 10MHz port output frequency: 10MHz
  • Output waveform: 3-channels 3.3Vpp square wave
  • Output impedance: compatible with 50 ohms and 75 ohms at the same time

I am using two of these coaxial cables from Digikey (15cm):
PART: ACX2042-ND
MFG : Amphenol RF / 245101-04-06.00

Ian mentioned at some point that "a SinePi can take both sine input and square input". Is this really the case?

Am I missing anything? Any ideas?View attachment 1057390

What is the FOS-3?

Ian
 
Hello everyone,

I need some help as I am not able to make the Sinepi work with an external FOS-3 device.

My setup:
RPI4-->ConditionerPI-->FifoPi Q3 Ultimate-->ReclockerPI-->HDMI LVDS Transmitter MK2
I am powering the 5V on Conditioner PI and 3.3V on the FifoPI from an HDPLEX 300.

I have used successfully Accsilicons with the above config. I am trying now to replace the Accusilicons with 44.1 and 49MHz provided from the FOS3 to Sinepi.
SinePI is installed replacing the two Accusilicons, using exact same configuration for u.fl cables. I have no sound out. What I have noticed is if I turn off
the FOS-3 the relay switches continuously - this would mean that there was a lock and without there is no lock (so the clock is provided and locked with FOS-3)?
Attached the u.fl cable cable configuration used (successfully with Accusilicons and unsuccessfully with FOS-3)
FOS-3 characteristics according to the manufacturer:
  • OUT1 output frequency: 44.1k-88.2k-176.4k-352.8k-48k-96k-192k-384k-8.4672M-11.2896M-16.9344M-33.8688M
  • OUT2 output frequency: 44.1k-88.2k-176.4k-352.8k-48k-96k-192k-384k-8.4672M-11.2896M-16.9344M-33.8688M
  • 10MHz port output frequency: 10MHz
  • Output waveform: 3-channels 3.3Vpp square wave
  • Output impedance: compatible with 50 ohms and 75 ohms at the same time

I am using two of these coaxial cables from Digikey (15cm):
PART: ACX2042-ND
MFG : Amphenol RF / 245101-04-06.00

Ian mentioned at some point that "a SinePi can take both sine input and square input". Is this really the case?

Am I missing anything? Any ideas?View attachment 1057390
I’m no expert on this but you’re using the same frequency families on both clock inputs. Maybe that’s the reason it keeps switching.