Kenosha Reuse Discussion Board > CALEDONIA, WI
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> FE5680A rubidium frequency standard
FE5680A rubidium frequency standard
* Extremely low silhouette: less than 1.0 inch
* Stability over temperature: 5x10(-11)
* Stability: To 5x10(-12)/ sqrt(t) to 2x10(-10)/year
2.Connect the RS232 to its motherboard (where also have a TX RX connetor )
3.Open the Hyper Terminal in your windows system.
5.Then follow my manual,And calculate two Mathematics.
6.Type the number on your keyboard. and press the Enter on your keyboard.
7.The signal what you need will come from the pin6.(From 1hz to 20mhz freq,this depend on what you type on the keyboard or what you want .)
8.if you want the freq been locked.when you power on next time,also no need to do again aboved,just one command type on your keyboard will been enough.
I also have a set of instructions to reprogram these.
i have more these oscillator...
Function Description Technical Characteristics
Many commercial applications for precision frequency standards demand performance over an expended temperature range. Often frequency variation with temperature is the performance range. Often frequency variation with temperature is the performance-limiting feature of these devices for CDMA holdover applications. The two products described in this paper have both been designed to operate over extended temperature ranges while guaranteeing a frequency variation of less than 1E-10. The FE-5680A operates at any temperature between -10 and +60 deg. C, a temperature range required for indoor rack-mounted telecommunication hardware with limited air flow. The FE-5652A operates at any temperature between -40 and +85 deg. C, a temperature range required for outdoor, limited access, low maintenance telecommunication hardware.
Frequency variations due to ambient temperature variations can easily swamp other sources of instability for a Rb frequency standard operating in a real life environment. Therefore, special attention was given to frequency stability vs. temperature in these designs. Figure 5 and 5 show typical performance data for FE-5680A and FE-5652A. Rb standards over the ambient temperature range. In addition to the information provided by these plots, it is useful to understand the distribution of performance associated with a production lot of these devices. Table 2 provides this information.
The information in this table shows that the mean total frequency deviation over temperature is very small. What this really means is that the frequency deviation is equally likely to be positive or negative. The standard deviation values give an indication of the range of deviations to be expected amongst production devices.
Allan deviation stability data for the FE 5680A Rb standards are shown in Figure 7. The measurements used to derive the Allan deviation were all made at 25 deg. C. It is of interest to note that the result for SN 4005 is significantly improved by comparing it to another Rb standard (SN 5359) rather than a Cs reference. This indicates that the result is limited by the stability of the Cs reference.
10 MHz (factory settable 1 Hz to 20 MHz)
Short Term Stability Averaging Time (SEC)
0.5 V RMS into 50 ohm sinewave
email ****@gmail.com QTY more just ask for me i have more
by EMS worldwide S&H fee total $20 USD 10 business days to japan
any problem contact me ****@gmail.com
