Description

Experience an unprecedented level of musical excitement thanks to JCAT’s first-ever in-house developed OCXO (Oven-Controlled Crystal Oscillator) Master Clock Generator.

Unlock the full potential of your JCAT USB XE card and elevate its performance to the absolute pinnacle with the Master OCXO upgrade.

Our Master OCXO Upgrade isn’t just an enhancement; it’s a true transformation of sound quality. The clock’s low noise and exceptional stability bring purity and precision to your audio system.

Features

No-Compromise Expert Design.

The Master OCXO Clock board and the included RF clock cable were designed in collaboration with a specialist in radiophysics who provided invaluable insights ensuring that every technical aspect was carefully considered. By focusing on the most subtle nuances, JCAT has attained an unparalleled level of musical playback quality within the realm of digital audio.

Superior OPTIMO Power.

The power supply section on the Master OCXO Clock module derives its excellence from the distinguished OPTIMO series truly-linear power supplies. It features two separate power phases for the Oven-Controlled Crystal Oscillator and for the clock output buffer guaranteeing peak performance while minimizing unwanted interference.

Luxurious Audio Commponents.

The Master OCXO board is meticulously gold-plated, fitted with premium audio components ensuring top-quality connections and reliability for years.

The ultimate and the best upgrade for your USB Card

While the OCXO found on USB & NET XE cards is already of exceptional quality, opting to upgrade to the Master OCXO instantaneously elevate your digital frontend to a level akin to possessing a higher-class DAC. Invest in the Master OCXO Upgrade and experience the difference in sound quality that will take your audiophile experience to an entirely new level. The price includes free worldwide door-to-door upgrade service; the customer will receive a pre-paid UPS Express return label for his USB Card XE, the card will be upgraded at our factory in Poland and the customer will receive upgraded USB Card XE with the Master OCXO as pictured below. The successor of the USB Card XE – the USB Card XE EVO – can accept the Master OCXO Clock without any modifications!

Connections

 

DC barrel plug 5.5/2.5 power connector, center positive, connect 5V 1A power supply here.

HDD type power connector 5V only, connect PC power supply HDD connector here.

Power OK LED indicator, this illuminates when Master OCXO module successfully powers up.

OCXO oscillator

Clock output 1 female SMA connector.

Clock output 2 female SMA connector.

 

Specification

• DC supply voltage	5 ± 5% V
  Power consumption	4.5 W (during warm-up) 1.5 W (steady typ.)
  Max input current	900 mA
  DC input connectors	5.5/2.5 DC barrel LP4 Molex
  Standard operating temperature	0 to +40 °C
  Storage temperature	-40 to +85 °C
  RF output frequency	20 MHz *
  Output impedance (unbalanced)	50 Ω
  RF output voltage (at 50Ω load)	2.2 Vpp
  RF output type	CMOS
  Clock outputs	2x SMA
  RF cable	6G 50 Ω 200 mm length MIL-SPEC SMA **
  Warm up time (typ. @25 °C)	5 min.
  Phase noise	<-135 dBc/Hz @ 100Hz offset typ.
  Frequency stability	± 5 ppb
  Dimensions	86 x 49 x 23 mm
  Weight	90 g

  • * other frequencies available on request
  ** custom connectors available on request

Is there general recommendation how/where should one place his Master OCXO board in the computer?

Place of instalation is limited by length of RF cable. We did not find it matters much. You need to keep in mind that the OCXO oscilator runs quite hot, so it is wise to give it some space. There is self-adhesive tape included to install the Master OCXO in the enclosure and help with RF cable arrangement.

I see there are 2 Clock Output terminals on the Master OCXO, can I use one of them to output the clock signal for the NET Card XE?

The current revision of the NET Card XE runs a different clock frequency, so that won’t work. However, JCAT will release a new version of the NET Card XE in 2024 that will accept the same clock frequency as the USB Card XE/EVO. It will be possible to use a single Master OCXO Board for both cards then, without any performance drawbacks.

Can I use the Master OCXO with any other components?

Yes, you can install it as a DIY upgrade kit in a DAC, music server, network switch etc. You can order a different frequency of the Master OCXO; e.g. 10MHz or 25MHz. You can request a different connector for the RF cable (e.g. BNC). This is included in the price. Although the free upgrade service is limited to JCAT cards, so for other components you are buying the Master OCXO Upgrade as a DIY kit. Should you need any assistance please contact us at [email protected] 

Can I use a single OPTIMO nano PSU to supply both the USB Card XE and the Master OCXO Clock?

Yes, you can! The OPTIMO nano 2A output current will be sufficient to power both the USB Card XE and the Master OCXO Clock.