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Author Topic: Jitter Measurements. Gungnir Gen 2 + Chord Gem + AGD M7 Others  (Read 3723 times)

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Marvey

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Jitter Measurements. Gungnir Gen 2 + Chord Gem + AGD M7 Others
« on: December 09, 2013, 06:18:06 AM »
JTEST 48k/24. I should have lined the X axis better to show 500Hz intervals - where some of the jitter components would be seen / expected.
  • Audinst HUD MX2 DAC USB
  • Chord Gem DAC USB
  • Gungnir Gen 2 USB
  • AGD-M7 COAX
Note: those sidebands at 10,11, 13, 14 are from the ADC on the laptop. The show up when AC power is plugged in. LOL.
« Last Edit: December 10, 2013, 05:51:52 AM by purrin »
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Solderdude

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Re: Jitter Measurements. Gungnir Gen 1 and Gen 2 USB + Chord GEM DAC
« Reply #1 on: December 09, 2013, 06:39:02 AM »
Thanks Marv !  :)p1

Are you absolutely sure the gen1 and gen2 aren't the same plots by accident ?
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Marvey

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Re: Jitter Measurements. Gungnir Gen 1 and Gen 2 USB + Chord GEM DAC
« Reply #2 on: December 09, 2013, 06:44:18 AM »
Quote from: Solderdude on December 09, 2013, 06:39:02 AM
Thanks Marv !  :)p1

Are you absolutely sure the gen1 and gen2 aren't the same plots by accident ?


Looks like same file. They both look pretty much the same on the scope - so I probably got the files mixed up. I'll redo them again.
« Last Edit: December 09, 2013, 06:49:54 AM by purrin »
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Solderdude

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Re: Jitter Measurements. Gungnir Gen 2 + Chord Gem + AGD M7 Others
« Reply #3 on: December 09, 2013, 08:36:56 AM »
it looks like Shiit knows their DAC shit in any case.
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zerodeefex

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Re: Jitter Measurements. Gungnir Gen 2 + Chord Gem + AGD M7 Others
« Reply #4 on: December 09, 2013, 05:32:13 PM »
I have the full dinky DAC collection sans LH Geek and the microStreamer (with you). You want the lot of em for measuring?
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Marvey

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Re: Jitter Measurements. Gungnir Gen 2 + Chord Gem + AGD M7 Others
« Reply #5 on: December 09, 2013, 06:22:17 PM »
That would be fun, but write your uber little DAC review first.
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funkmeister

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Re: Jitter Measurements. Gungnir Gen 2 + Chord Gem + AGD M7 Others
« Reply #6 on: December 10, 2013, 04:57:24 AM »
I thought the Chord would've done better.

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Marvey

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Re: Jitter Measurements. Gungnir Gen 2 + Chord Gem + AGD M7 Others
« Reply #7 on: December 10, 2013, 05:20:41 AM »
Should be interesting once I get my OR5 back.
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Stapsy

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Re: Jitter Measurements. Gungnir Gen 2 + Chord Gem + AGD M7 Others
« Reply #8 on: December 10, 2013, 03:39:18 PM »
Neat to see the measurement system growing. I am curious about the side bands you mentioned. Are they audible distortions and if so, are there any ways to eliminate them?
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Marvey

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Re: Jitter Measurements. Gungnir Gen 2 + Chord Gem + AGD M7 Others
« Reply #9 on: December 10, 2013, 05:11:45 PM »
Side bands are another form of jitter, in this case inherent in the measuring laptop. Pull the power brick on the laptop, it goes away. All sorts of funny things.
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