Quote:
Originally Posted by jbward  Folks,
Which clock do you suppose I should use as a master, my Lucid GENx192 master clock or the clock in my Neve 1073 DPD?
The Lucid GENx192 is required to sync everything else I'm using (003R, SSL Alpha Channel with crappy non-word SPDIF-only option, POD XT Pro AES sync, etc). However, the Lucid can either drive everything using it's own internal clock or it can accept an external word clock as master and just act as distro.
My logic is that the Neve is probably pretty sweet, but also thinking that since the Lucid is *only* a clock that perhaps it might keep up or have the edge.
Unfortunately my ears can't do me any good right now as everything is ripped apart and I'm awaiting a few remaining cabling components.
Love to hear some thoughts or better yet experience. |
#1. recently I have purchased a Drawmer D-Clock that can measure clock accuracy in realtime.
but dont have the Lucid genx192 or Neve clocks around to test them.
i wrote to Lucid asking the Genx192 vs. 88192 performance...,
becouse the old .pdf brochure/spec, Lucid say it has +-25ppm
the new .pdf they removed that info.
GENx192_ds.pdf - 866.7 KB,
they wrote:
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From:
"Symetrix" <support@symetrixaudio.com>
Add sender to Contacts 
Update for Case #673 - "88192" Jitter measurements were made using the Stanford 610 Universal Time Counter. Jitter is expressed (in seconds) as the Mean Allan Variance of 10,000 measurements of the positive edge-to-positive edge period of the input clock, running at the frequency indicated. Arming mode is External-Time, positive edge. The devie and the Stanford counter were allowed to warm up for at least 30 minutes prior to taking the measurements. The test used BNC cable terminated at the counter with 50-ohm termination. The word clock signals were generated internally by each device.
Here are the Gnx192 jitter specs using teh Standford method.
Word Clock Frequency GenX192 MAV Jitter (picoseconds) 44.1 KHz 28 48.0 KHz 31 88.2 KHz 36 96.0 KHz 26 176.4 KHz 75 192.0 KHz 73
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#2. clocks are sensible/afected by dirty AC power.
be shure to buy a Furman AR-15 Series ][, minium.
also true 99.997% OFC cables like philips pxt1000 or better silver cables like acoustic zen silver byte.
also the crystal optimal operating temperature is 31° acording to wiki.
#3. You should try to do the loop back test to see any changes. if you have RME or Lynx soundcard disable DDS &/or SynchroLock(TM), if you input a better external clock DDS not disabled that will not allow the soundcard to freelly follow the ext.clock.
test A/D D/A - without personal bias & without ears! http://www.gearslutz.com/board/4277032-post3.html Drawmer D-Clock