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Rubidium Atomic Frequency standard FE-5680A Series
The item is a Rubidium Oscillator Frequency Standard from FEI, model number FE-5680A. This oscillator is a pull from a system that is no longer in use. These units provide a 1 Pulse-per-Second output.It is used in excellent condition FE-5680A Rubidium Frequency Standard made by Frequency Electronics and its output frequency can be changed.If you want to change the frequency,I will give you the instructions and software on how to modify this item to 10 MHZ output (1hz-20mhz).It's easy to change the frequency.You just connect the item to the PC via RS232 and run a Hyper Terminal in your windows system.Then run a software that I give you and type the frequency you want.The change of frequency is complete.
You can set the frequency to 11.2896Mhz OR 16.9344MHz 8.4672MHz.Somebody DIY it and use it on CD player.It can let your CD super stable and enhance the sound quality.
In practice, it seems that the unit only likes frequencies somewhat close to the originally set frequency. There is probably a band-pass filter somewhere on the board that attenuates the signal for frequencies far from the original one. It has been reported by others that a frequency range of 1.5 MHz to 15 MHz gives a decent measurable output. I have not yet verified this myself. If you can find out where this bandpass filter is and how to change or remove it, it may be possible to get a wider frequency range – although it is probably limited by the Nyquist frequency of about 25 MHz.
We test all before delivery. What you will get is orininal sealed (already tested and calibrated in our lab)
If you buy several items once,we'd like to give you a good discount.
Shipping Terms
Shipping cost via DHL to worldwide 3-9 bussiness days.
If you are in remote area,I will ship the item to you via EMS.
We ship to the confirmed address provided by PayPal. Before you pay, please make sure your address in PayPal matches the address you would like us to ship to.
We ship items to worldwide.
Buyers' Information: We strive our best to provide you the most reliable, affordable way of shipping service. But sometimes international delivery is highly depended on the courier company and local customs/duties. If you do not receive your item on time, please contact us immediately for further assistance. Thank you for your understanding.
We offer combined shipping which will save your shipping cost greatly for your multiple purchases. Please do not pay until you make your last purchase.
Payment Terms
All Paypal Payments must be Confirmed ( Shipping and billing addresses must match )
Payment must be made within 48hrs of the auction end time.
Non-Paying bidders will be reported.
Do not hesitate to contact us anytime before and after your purchase, we are committed to your 100% customer satisfaction.I am here and ready to assist you with any questions or concerns you might have before or after the purchase. My goal is to make sure you are a happy customer and pleasant shopping with us.
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