This must be the XO module current consumption . What about the DAC chip itself especially the digital core 1.2V supply and others?
Terra Firma Master Clock
Hi Joe,
After discussing with the rest of the team it was decided that further details on pricing and availability of your TFL clock for DIY use is needed before going forward. Even a ball park figure based on your previous products would do at this stage and must be available for purchase for this project if we find it beneficial. This option will be posted on my blog. There are a number of enquiries already.
Hope this is not too much of an imposition but this project is non-commercial really and anyone with commercial interest who wish to contribute must make their intentions clear. From previous experience someone with vested interest tried to engage us with promising contributions but cooled off suddenly after realizing that this DAC could easily cannibalise their own $10K product. So we wasted a lot of time running around for them. As your are in business with Oppo mods there could be similar conflict of interest.
So we need pricing, availability and technical details as indicated above please ... Hope you understand our position.
Cheers, Acko
Hi Joe,
After discussing with the rest of the team it was decided that further details on pricing and availability of your TFL clock for DIY use is needed before going forward. Even a ball park figure based on your previous products would do at this stage and must be available for purchase for this project if we find it beneficial. This option will be posted on my blog. There are a number of enquiries already.
Hope this is not too much of an imposition but this project is non-commercial really and anyone with commercial interest who wish to contribute must make their intentions clear. From previous experience someone with vested interest tried to engage us with promising contributions but cooled off suddenly after realizing that this DAC could easily cannibalise their own $10K product. So we wasted a lot of time running around for them. As your are in business with Oppo mods there could be similar conflict of interest.
So we need pricing, availability and technical details as indicated above please ... Hope you understand our position.
Cheers, Acko
Last edited:
SAW XO
You are probably browning the chip already!
I see what you are trying to do: push the frequencies higher to get into the sweet spot of SAW technology. Lets take this further - to take advantage of synchronous clocking beyond 100MHz, we are looking at a 196.608MHz SAW XO. The AKX-701 can be made to 'spin' at X16 to match but the DAC will not be able to take it anymore. So we may have to wait for ESS to release a 200MHz part, hopefully
You are probably browning the chip already!
I see what you are trying to do: push the frequencies higher to get into the sweet spot of SAW technology. Lets take this further - to take advantage of synchronous clocking beyond 100MHz, we are looking at a 196.608MHz SAW XO. The AKX-701 can be made to 'spin' at X16 to match but the DAC will not be able to take it anymore. So we may have to wait for ESS to release a 200MHz part, hopefully
Hi, acko,
May I ask one detailed question on your "TURBO Master Clock 100M - AKX 701 "?
I assume this board has two separate clock out interface pins for sending divided clock signals to a transport and accepts a clock selection control logic signal from the transport side. If one of two clocks is selected, does another non-selected output pin remain at a high-impedance state?
The reason why I ask this is that two clock input pins are internally tied together in the case of SDTrans. It expects a high-impedance of non-selected side.
Thanks a lot in advance.
May I ask one detailed question on your "TURBO Master Clock 100M - AKX 701 "?
I assume this board has two separate clock out interface pins for sending divided clock signals to a transport and accepts a clock selection control logic signal from the transport side. If one of two clocks is selected, does another non-selected output pin remain at a high-impedance state?
The reason why I ask this is that two clock input pins are internally tied together in the case of SDTrans. It expects a high-impedance of non-selected side.
Thanks a lot in advance.
AKX-701 to SD Trans Connection
Hi Bunpei,
The slave clock outputs of AKX701 are actually identical. All division and selection are already done on board. So for the SD Trans that has only a single clock input you can use any one of the slave clock outputs. For other types of transport that usually have 2 inputs or XO both slave clock outputs can be use.
As I get things arranged for tests I will post more details on different types of connection.
Hi Bunpei,
The slave clock outputs of AKX701 are actually identical. All division and selection are already done on board. So for the SD Trans that has only a single clock input you can use any one of the slave clock outputs. For other types of transport that usually have 2 inputs or XO both slave clock outputs can be use.
As I get things arranged for tests I will post more details on different types of connection.
Yes, you can source master clock directly from the MCLK of xmos usb-i2s. The max clock freq from these type of transports is usually 24.576MHz. Simple, saves costs and works fine with the DAC right up to 192kHz. Also puts the DAC into synchronous mode for better jitter performance.
For this DAC the jitter reduction improves further with higher MCLK so getting this to the max 50MHz and still keeping it synchronous is most beneficial. This is where the external Turbo Clock (AKX-501) comes in. It is pricey and requires transport mods to suit but gives ultimate performance.
Hi,
The plan is to use lorien card, who recommand your products
WaveIO | Luckit. I hope the reference is ok, if not, i will erase it.
The plan is to use lorien card, who recommand your products
WaveIO | Luckit. I hope the reference is ok, if not, i will erase it.
Yes, there is a big mother there but I am scheming things for a shoot-out with the big brother costing 10 times more, so just trying to up the ante a bit of this small fella!
qusp and I will have a shoot out of our own at some point too no doubt
??? -> FIFO -> ISOL -> reclock -> AKD12P -> NTD1 -> Wire BAL-BAL [digital volume]
vs
WaveIO -> FIFO -> ISOL -> reclock -> AKD23P -> JG Filter/Buffer -> 10k smt stepped attenuator -> Wire SE-SE
EDIT: Tom, you know what they say about big film caps ....
??? -> FIFO -> ISOL -> reclock -> AKD12P -> NTD1 -> Wire BAL-BAL [digital volume]
vs
WaveIO -> FIFO -> ISOL -> reclock -> AKD23P -> JG Filter/Buffer -> 10k smt stepped attenuator -> Wire SE-SE
EDIT: Tom, you know what they say about big film caps ....
Last edited:
Yeah they say I have too many of them...
I was tidying my tiny man cave yesterday evening and put all waiting parts into separate boxes. The cap box was easily 10kg and is worth more than my current hand-me-down car.
PRIORITIES
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.