OCXO Clock Products Selection Guide

Our clock products can be selected to suit your audio equipment, listening environment, and budget. This guide covers our current Signature, Plus, and Palladium Plus series.
・ About OP Grade
・ Differences and features of each clock series, and how to choose
・ About power supply options
・ About installation methods

■ About OP Grade
OP Grade is Cybershaft's performance grading system, based on measured phase noise and Allan deviation. Higher OP grades indicate more demanding selection criteria. Our current Signature series offers grades OP20A to OP23A; OP23A is the highest grade in this series.
For the precise selection values and available grades, please refer to the table on each product page. Phase noise is specified at a stated frequency offset, and Allan deviation at a stated averaging time (τ). Lower values indicate better measured performance for both quantities; for phase noise expressed in dBc/Hz, a more negative value is better.
Choose the OP grade within your budget after checking the number of outputs and power configuration you need. Audible results depend on the connected equipment and listening system.

■ Differences and Features of Clock Products, How to Choose
First, confirm that your equipment accepts an external 10 MHz clock. Check the required input impedance and signal level in its manual. Then choose the number of outputs required for your system.

【 Signature Series — OP20A to OP23A 】

Our flagship series uses an OCXO selected specifically for Signature models. Choose 2, 4, or 6 outputs according to the number of compatible devices you wish to connect.
The 2CH model requires an external DC power supply. The 4CH and 6CH models are available in DC-only and AC/DC configurations. Each output's 50Ω/75Ω impedance and ground connection can be set individually. The output level is switched in common for all channels.

【 Plus Series — OP16A to OP19A 】

The Plus series offers 2CH and 4CH models, with refined circuitry and a choice of OP grades. The 2CH model requires an external DC power supply; the 4CH model is available in DC-only and AC/DC configurations.
Choose this series when its measured performance, output count, and power options suit your system and budget.

【 Palladium Plus Series — OP11 to OP19 】

Palladium Plus provides one 10 MHz output in a compact chassis. It requires an external DC power supply, sold separately.
If you need to connect additional compatible devices, consider a suitable clock distributor or a clock model with more outputs. Check the distributor's specifications and power requirements before ordering.

■ About Power Supply Options
DC-only models require a suitable external DC power supply. AC/DC models can use their built-in AC power supply; select the correct AC voltage option for your country when ordering.
Our current external power supplies include LTPW03/LTPW03P and LTPW06. The LTPW03 and LTPW03P differ in their front panel design; their performance is the same. LTPW06 uses a compact enclosure suited to the Palladium/Palladium Plus series.
Check the clock's required DC voltage, current, connector, and polarity, and select the matching DC cable. DC and AC cables are sold separately with these external power supplies. Refer to each product page for the complete specifications and included accessories.

■ About Installation Methods
Clock units are sensitive to vibration and electromagnetic interference. Place the clock on a stable surface away from strong vibration and magnetic fields, including those from power amplifiers and transformers. Where possible, avoid stacking the clock and its external power supply directly on top of each other.

If you are unsure which model or connections to choose, please contact us with your equipment model names and destination country.