Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 26th June 2009, 04:21 PM   #1
diyAudio Member
 
Join Date: Oct 2005
Default denon 3930 pll

Does the denon 3930 also have the poor pll-clock with 450ps jitter as the 2910 and the 3910 do?

I was considering to buy one secondhand, but only if they did a better job with regards to the clock.
  Reply With Quote
Old 8th September 2010, 10:19 PM   #2
diyAudio Member
 
Join Date: Aug 2010
Im trying to figure out if I can modify that PLL too...
  Reply With Quote
Old 10th September 2010, 07:08 AM   #3
diyAudio Member
 
Join Date: Oct 2005
The jitter specs of the pll of the 3930 is much better (about 50ps). I'm puzzled why it is fed with the output of a RAM-chip, instead of directly from a crystal.

For best audio change the clock of the dsp-chip and improve the power supply.
  Reply With Quote
Old 10th September 2010, 11:15 AM   #4
diyAudio Member
 
Join Date: Aug 2010
But isnt the DACs clocked with the 24.576 Mhz?
The DSP runs on 27MHz
  Reply With Quote
Old 10th September 2010, 12:41 PM   #5
diyAudio Member
 
Join Date: Oct 2005
The chip that does the al-24 processing has the 24...Mhz clock and also does the spdif out. So it's a good candidate for reclocking.

27Mhz is used for al the video stuff.

dsp is clocked with 25Mhz
  Reply With Quote
Old 10th September 2010, 01:44 PM   #6
diyAudio Member
 
Join Date: Jan 2005
Location: a littlee town in western denmark
I have the Newclassd clock in the denon 3930---like the sound --
  Reply With Quote
Old 10th September 2010, 01:54 PM   #7
diyAudio Member
 
Join Date: Aug 2010
The music streem could go from the main processor through the FPGA and directly to the DAC if im not using the al24 processing.. right?
Click the image to open in full size.
  Reply With Quote
Old 10th September 2010, 05:55 PM   #8
diyAudio Member
 
Join Date: Oct 2005
Professional modders considder the 24...Mhz clock the most important for audio.
The fpga is connected to the "al-24" chip. In the blockdiagram you can considder them as one.
According to denon, all audio is al-24 processed.
  Reply With Quote
Old 13th September 2010, 10:26 AM   #9
diyAudio Member
 
Join Date: Jan 2008
Location: Virginia
I am curious where did you get the 450ps value for the jitter?
The jitter on audio part is based on the 24MHz one when you are in PCM mode and on the 24.576MHz only in SACD DIRECT mode. Both are good clocks.

Last edited by SoNic_real_one; 13th September 2010 at 10:29 AM.
  Reply With Quote
Old 13th September 2010, 12:10 PM   #10
diyAudio Member
 
Join Date: Oct 2005
The pll of The 3910 (sm8701) and the 2910 has a jitter-spec of 450ps with fs-frequencys higher then 48Khz (so 88,2K, 96K, 172K and 192K)
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Need Help on Denon DCD-S10 Noak Digital Source 64 21st February 2009 11:45 PM
Denon DVD-3930 Service Manual required Fidelity Audio Digital Source 0 29th August 2008 08:43 AM
Denon Pma-860 ManUtd Solid State 4 11th January 2005 08:14 PM
denon dcd 520 crippledchicken Digital Source 3 9th September 2004 05:54 PM
Denon DCD 615 Mazta Digital Source 0 27th May 2003 10:22 AM


New To Site? Need Help?

All times are GMT. The time now is 08:33 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2