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[#1] Cybershaft OCXO 10M Clock 同好會     
Cybershaft pre-order only at AfterDark.:

https://www.adark.co/products/%E8%B6%85%E9%AB%98%E7%B2%BE%E5%BA%A6-cybershaft-ocxo-10mhz-op20a-op21a-%E6%99%82%E9%90%98

Hiendy Review:
https://www.hiendy.com/hififorum/forum.php?mod=viewthread&tid=130889&extra=&page=1


BigS
個人訊息 會員
210.xxx.xxx.81
2019-11-07 16:36
[#2] Cybershaft OCXO 10M Clock 同好會     
Cybershaft OP20A/OP21A

http://www.cybershaft.jp/a-products/op20a.html



最後修改時間: 2019-11-07 16:38:16
BigS
個人訊息 會員
210.xxx.xxx.81
2019-11-07 16:37
[#3] Cybershaft OCXO 10M Clock 同好會    
入咗部二手premium OP14.
用番跟機線,效果OK嗎?
若果何更加提升效母,那隻電源線比較好/合理?
謝。
Yourcousin
個人訊息 會員
180.xxx.xxx.105
2020-05-09 13:32
[#4] Cybershaft OCXO 10M Clock 同好會    
日本Cybershaft x AfterDark. 特別合作 , 開始銷售最新, Cybershaft 超高性價比10M時鐘.

Cybershaft Silver / Gold / Platinum OCXO 10MHZ 時鐘
https://www.adark.co/collections/cybershaft/products/copy-of-cybershaft-ma-op13-op19-ocxo-10mhz-%E6%99%82%E9%90%98-vip

CYBERSHAFT PALLADIUM OCXO 10MHZ 時鐘
https://www.adark.co/collections/cybershaft/products/cybershaft-palladium-ocxo-10mhz-%E6%99%82%E9%90%98-x-afterdark-limited-edition-50



最後修改時間: 2020-10-22 11:04:24
BigS
個人訊息 會員
203.xxx.xxx.198
2020-10-22 10:54
[#5] Cybershaft OCXO 10M Clock 同好會    
老闆介紹吓3萬幾同5萬幾有乜大分別ok? Thanks
Joeyd
個人訊息 會員
138.xxx.xxx.91
2020-10-22 15:32
[#6] Cybershaft OCXO 10M Clock 同好會    
主要區別在於1Hz Offset 偏移中的質量噪聲.

OP21a 5萬幾旗艦款: 121dBc/Hz in 1 Hz Offset
OP18a 3萬幾次旗艦: 118dBc/Hz in 1 Hz Offset

OP20a-21a : 非常罕見, 市場上的時鐘非常少, 可以達到這種品質.

Cybershaft也比較有信心,提供了有關10M時鐘性能的實驗室報告

BigS
個人訊息 會員
203.xxx.xxx.198
2020-10-22 16:43
[#7] Cybershaft OCXO 10M Clock 同好會    
5萬幾可以買美國鹿仔10M原子鐘啦

仲買OCXO 鐘??

最後修改時間: 2020-10-22 16:47:34
winning7
個人訊息 會員
219.xxx.xxx.25
2020-10-22 16:46
[#8] Cybershaft OCXO 10M Clock 同好會    
Cybershaft Palladium OP13 10M OCXO Master Clock $11000 已經好好聲

Cybershaft 入門最低 Silver OP04 10M OCXO Master Clock $4380 日本本地市場超賣。



最後修改時間: 2020-10-22 17:01:15
BigS
個人訊息 會員
203.xxx.xxx.198
2020-10-22 16:52
[#9] Cybershaft OCXO 10M Clock 同好會    
新款 Platinum UPOCXO-PL-01 能有 op13 水平嗎?
louishui99
個人訊息 會員
223.xxx.xxx.30
2020-10-23 15:18
[#10] Cybershaft OCXO 10M Clock 同好會    
新款 Platinum UPOCXO-PL-01 有 op09 水平
BigS
個人訊息 會員
203.xxx.xxx.198
2020-10-23 17:55
[#11] Cybershaft OCXO 10M Clock 同好會    
原子鐘個short term phase noise (PN)會差過 ocxo, 但 long term holdover又會好得多,也許音响糸統是可以短暫trade off.

mcc_2001
個人訊息 會員
218.xxx.xxx.114
2020-10-24 08:44
[#12] Cybershaft OCXO 10M Clock 同好會    
玩audio, short-term PN 比較重要。
我很久用開Esoteric G-0Rb。近期加 OCXO input to G-0Rb, 個系統聲靚好多。

最後修改時間: 2020-10-24 12:46:03
Yourcousin
個人訊息 會員
180.xxx.xxx.105
2020-10-24 12:39
[#13] Cybershaft OCXO 10M Clock 同好會    
7哥,咁又係喎,以前我都以為原子鐘正,但我有機會俾人度吓個phase noise,原來差都無輪
大冬瓜
個人訊息 會員
42.xxx.xxx.177
2020-10-24 21:06
[#14] Cybershaft OCXO 10M Clock 同好會    
我搵吓個phase noise圖,atomic clock比ocxo,揾到post上來
大冬瓜
個人訊息 會員
42.xxx.xxx.177
2020-10-24 21:08
[#15] Cybershaft OCXO 10M Clock 同好會     
atomic clock 比 ocxo 10m

我也都是實試....一班人都有相同感覺....

Cybershaft ocxo 10m 是 clock 應該有的整齊清晰, 但ocxo好難密度上有改善....我是代理引入香港前, 已做此測試, 早過好多香港用家認識

跟手再換回atomic clock 除左保持整齊清晰外, 仲有密度外, 音場深和闊好多, 樂器像真度亦改善不少, 似真樂器

至於看phase noise圖外, .......我想音樂也需用聽感吧...小弟玩鐘已十多年, 有玩樂器, 年年聽30場以上 classical 音樂會....聽慣的人自會分辨倒樂器像真度的分別....我也明分辨音樂本身其實也有一定的標準, 不是自己 happy 就得....但分辨倒樂器像真度聽慣就會明

atomic clock 比 ocxo clock 對 jitter 敏感度高好多(易濛過), 用錯線材容易衰聲過ocxo clock 好多....總之atomic clock用乜附件都要清晰, 愈清愈好, 否則效果易衰聲過ocxo clock

建議多聽多實試, 再去決定

我祗講如果有 $5皮...可以揀原子鐘而矣
可能我在此多言了.......不再回應....sorry

最後修改時間: 2020-10-24 23:05:32
winning7
個人訊息 會員
219.xxx.xxx.25
2020-10-24 22:51
[#16] Cybershaft OCXO 10M Clock 同好會     
上網睇到,有冇師兄用過?
https://www.thinksrs.com/products/perf10.html

另外,請問cybershaft張証,係唔係廠試過咁意思?
panda000
個人訊息 會員
210.xxx.xxx.221
2020-10-25 17:43
[#17] Cybershaft OCXO 10M Clock 同好會    

原子鐘個short term PN 不一定差過 ocxo。反之亦然。
乜牌子,乜原子鐘/乜ocxo, 重要的係入面個"鐘"。(當然,個鐘機的其他配套也重要。)

要將兩部鐘機比較,要比較short term PN.
If other things are equal, 相差2dBc,已唔同。

Yourcousin
個人訊息 會員
49.xxx.xxx.247
2020-10-25 17:55
[#18] Cybershaft OCXO 10M Clock 同好會    
通常,商業級產品不會以1Hz偏移發布性能報告,這是大多數製造商都無法達到的敏感值,大多數產品僅以10Hz偏移測量其相位噪聲。Cybershaft is using 1Hz offset to measure their phase noise, which is critical to audio. All Cybershaft will have the graph showing the phase noise characteristics and the short-term stability (Alan variance) and choose carefully to distinguish their OP level for customer to choose with respect to quality level for audio.

The OCXO installed in this product uses a stable individual after several months of calibration of a new OCXO unit. In order to perform the optimum selection as a clock for audio, we perform a comprehensive evaluation of the phase noise characteristics and the short-term stability (Alan variance) that can be scrutinized more closely.

The product cannot be evaluated by measuring only the output characteristics of the built-in OCXO unit. Our calibration measurement is not directly on the output of the OCXO unit, but is measured from the output terminal of this product in order to evaluate all the performance including the buffer circuit.
And selection reference value

phase noise: OP20A-1 offset 1Hz at -120 dBc / Hz or less offset 10Hz at -140 dBc / Hz or less
      OP21A-1 -140dBc / Hz or less offset 1Hz at -121dBc / Hz or less offset 10Hz
Allan variance short stability (Reference value)

OP20A-1 TAU = 1sec 2.5E-13 or less (0.00025ppb / s)
OP21A-1 TAU = 1sec 2.0E-13 or less (0.00020ppb / s)

The main criterion for grade selection at our company is the short-term stability value of Alan variance. For example, even if the phase noise value is -121 dBc / Hz or less at an offset of 1 Hz, OP21 will not be obtained if the short-term stability Tau = 1 sec value does not meet the standard. This is similar to the traditional OP grade selection method.

The above values ​​are not the general catalog values ​​(Typical) but the guaranteed values ​​measured individually, so the quality of the product is constant. There is no so-called "off".
* For the phase noise offset of 1Hz, an appropriate value with an offset of 1.000Hz to 1.099Hz is used to avoid averaging error. Phase noise measurements are very sensitive and have instrumental and measurement errors. The indicated phase noise values ​​include measurement errors rather than absolute values. The indicated phase noise value is a value measured under the same conditions of our company and is an index of product grading.

The short-term stability value of Alan variance is not clearly defined by international standards, so there may be a large error between calibration laboratories. The above selection values ​​will be the values ​​of our calibration equipment.



BigS
個人訊息 會員
203.xxx.xxx.198
2020-10-25 22:25
[#19] Cybershaft OCXO 10M Clock 同好會    
Thanks for your comprehensive information. No matter it is a commercial, industrial or mil products, some international standard has to be followed especially for the advanced digital application. Now, most of the products follow IEEE standard, such as the "Standard for Terminology and Test Methods for Digital-to-Analog Converters;” (IEEE Std 1696-2013) ", a new requirement (TC-10) is now proposed to address the issues of AM-PM noise as shown below. Nowadays, AM noise is observed also important to the digital signal jittering.

mcc2018
個人訊息 會員
218.xxx.xxx.114
2020-10-26 10:14
[#20] Cybershaft OCXO 10M Clock 同好會    
Phase Noise Comparison from high hand.



最後修改時間: 2020-11-07 10:53:40
BigS
個人訊息 會員
203.xxx.xxx.198
2020-11-07 10:49
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