Can I get anyone to talk in detail about these oscillators vs Asia sourced "Golden" TCXOs by Vanguard and/or Crystek's mid-range (CCHD-575) and high-end (CCHD-957) I intend to do an indepth review of oscillators after my discrete op-amp reviews for Burson and Orange Amp. are finished. So if this offers something above the three mentioned, I might be interested!
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Some measurements
Sorry to be a little bit late on this thread.
I made some jitter measurements with a couple of oscillators some month ago with
a Lecroy HDO6104 oscilloscope with their jitter module. Allthough i am still not shure how and
what that osci measured some comparison was possible.
I used differential probes and battery or a Hameg power supply for the oscillators.
So external noise should have been minimal.
All mentioned ps-values are TIE values if not noted otherwise.
I tested one TentLabs 33.8688Mhz, two Vanguard 33.8688 (gold), and
several oscillators from our old stock.
The Tent was really good one with appr. 2-3ps. It shows a jitter peak at appr. 6.277MHz
of appr. 4.3ps which may result from the internal PLL as Guido Tent told me.
This should not do any harm to audio.
I was really curious how the Vanguards would behave. Sorry.
Disapointing. Jitter showed up within a range of 40..70ps. Nevertheless
the Vanguards showed best frequency precision and stability of all measured oscillators.
Unfortunatelly this is irrelevant for audio.
I had an old dusty Hosonic 33Mhz oscillator from our stock here. This one performed as good
as the Tent. As this is a true pure crystal oscillator, it has no noticeable spurs as the Tent.
Interestingly the jitter did only rise by appr. 0.3ps when i used the Hameg HMP4040 switching power
for the oscillators. Feeding the differential probe from USB instead of batterie made jitter much worse.
Sorry to be a little bit late on this thread.
I made some jitter measurements with a couple of oscillators some month ago with
a Lecroy HDO6104 oscilloscope with their jitter module. Allthough i am still not shure how and
what that osci measured some comparison was possible.
I used differential probes and battery or a Hameg power supply for the oscillators.
So external noise should have been minimal.
All mentioned ps-values are TIE values if not noted otherwise.
I tested one TentLabs 33.8688Mhz, two Vanguard 33.8688 (gold), and
several oscillators from our old stock.
The Tent was really good one with appr. 2-3ps. It shows a jitter peak at appr. 6.277MHz
of appr. 4.3ps which may result from the internal PLL as Guido Tent told me.
This should not do any harm to audio.
I was really curious how the Vanguards would behave. Sorry.
Disapointing. Jitter showed up within a range of 40..70ps. Nevertheless
the Vanguards showed best frequency precision and stability of all measured oscillators.
Unfortunatelly this is irrelevant for audio.
I had an old dusty Hosonic 33Mhz oscillator from our stock here. This one performed as good
as the Tent. As this is a true pure crystal oscillator, it has no noticeable spurs as the Tent.
Interestingly the jitter did only rise by appr. 0.3ps when i used the Hameg HMP4040 switching power
for the oscillators. Feeding the differential probe from USB instead of batterie made jitter much worse.