Fe-5680a 10 Mhz Sinewave Rubidium Oscillator Std 50 Ohm

US $209.99

HONGKONG, Hong Kong
Jun 9th

Open on mobile:
QR code

This item has 10MHz & 1PPS output only.The Frequency could not change by programing This item send from HongKong Please refer: http://www.ka7oei.com/10_MHz_Rubidium_FE-5680A.html This version of the FE-5680A interfaces via a DE-9 connector - its only external connector - through which power is applied and signals (including the 10 MHz) emerge. These pins are used as follows: 1. V+ input (15-18 volts, typical.) The current is more or less constant across this voltage range with 15 volts producing less heat and consuming less power. 2. Ground - the same as pin 5. 3. Lock indication: High (>4 volts) = Error and/or unlocked; Low (<0.5 volts) = Physics lock (e.g. on-frequency) 4. +5 Volts. Most units lack an internal 5 volt supply and require this voltage to operate. The current consumption is only a few hundred milliamps, easily supplied by an external 7805 regulator. 5. Ground - the same as pin 2. 6. 1 PPS (Pulse Per Second) output. A 1 microsecond-wide pulse appears on this pin once the unit has achieved lock and the lock indication pin goes low. This pulse can be difficult to see on some oscilloscopes, but can be easily "heard" with an audio amplifier. There will be no output until pin 3 goes low, indicating that a lock has occurred. 7. 10 MHz output. The accuracy of this output should not be trusted unless there is a lock indication (e.g. pin 3 is low.) PIN 1: INPUT +15V to +18V ~700mA PIN 2: GROUND PIN 5: GROUND(For DDS) PIN 3: LOCK/UNLOCK PIN 4: INPUT +5V PIN 7: OUTPUT 10MHz Sinewave Function Description Technical Characteristics The Fe-5680A Rb frequency standard is 3.5x5.1 inches, a design suited to PC board slot mounted applications. A simplified functional block diagram is shown in Figure 3. 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 vs. TEMPERATURE 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. FREQUENCY STABILITY 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. SUMMARY Performance results for two new Rubidium frequency standard products have been reported. These products continue the trend toward small, robust, high-performance atomic frequency standards capable of operating in harsh non-laboratory environments, yet providing stabilities approaching those measured under controlled laboratory conditions. These devices are well suited to the demands of the telecommunications industry for the performance-limiting feature of these devices for CDMA increasingly precise time and frequency references capable of operating unattended in harsh environments. Al All of items will be sent with tracking number · We will ship the item according to the address on your eBay profile · No combine shipping discount and no local pickup service. Please make sure that you agree with our terms before bidding. · · ·We accept PayPal payment. · Payment must be fulfilled within 7 days after auction's ended. · ·For DOA (Defective on Arrival) item, please notify us for shipping instructions. ·Then, please send it back within 7 days upon date of receipt. ·Return shipping costs will be at buyer's expenses. · We only accept the returned goods with full packaging materials. · When we receive your returned item, we will investigate the situation and consider to offer replacement or refund according to the situation. · We are professional online trader with excellent customer services. · Our team is working everyday to communicate with our customers and to bring the latest products for your selection.