Rubidium Frequency Generator HG 414A Preliminary data The
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1. they turn back preferably on an average level of E2 so that there is an accumulation of E2 E2 and E1 differ by a frequency of 6 834 GHz 685 the amount of energy After Anreicberung levels of E2 may be a redistribution of the kind made by the action of the external field that the Nieveaus E1 and E2 are re occupied the same frequency This occurs when the frequency of the field agrees with the Rb resonance frequency as accurately as possible This leads to a re onset of absorption of the pump light wavelength 780 nm The resulting change in the transparency of the resonance cell is used to detect the resonant frequency of a photodiode The detector signal is used to Nachsteuerung of the excitation frequency supplied auxiliary oscillator which simultaneously provides the output signal Rubidium Frequency Generator HG 414A New production from the Russian space research for Deutchland modified User manual Power supply Netzchalter 1 with Jack 2 230 volts AC Power supply by DC is also possible Socket 3 Pin 1 Ground Pin 4 24 to 27 volts DC max 2 5 Amp The possibly Gleischspannungversorgung is not turned off the power switch turns on It can remain connected and does offer the Netzaufall Stromversorgung Screen 4 displays the function Red LED and or 0 1 3 thermostat or control loop is not ready Green LED function given Break in period at 20 C room temperature for about 30 minutes 1x10 10 Result after ab2. Rubidium Frequency Generator HG 414A Preliminary data The rubidium frequency generator HG 414A provides for separate outputs RF signals of 0 1 1 5 and 10 MHz with an accuracy of about 2 10 11 for control or calibration of Frequenzesynthesizern frequency counters etc Second pulses of approximately 17 4 microseconds duration and a rise time of about 30 nanoseconds are available The built in digital display can be used as a fast and accurate frequency counter resolution 1 10 11 used The fast gate time of one second due to a limitation of the measuring range of 5 MHz is 500 Hz at a measurement time of 10 seconds det area still 50 Hz and the display 1 10 12 offers the measurement time of 100 seconds det range of 5 Hz limited Different frequencies may need to be accommodated by dividing or multiplying at 5 MHz The time interval of external to internal second pulses can be close shows in microseconds The digital display can be used as a Clock The accuracy of 2 10 11 at 10 GHz corresponds to a deviation of 0 2 Hz Principle In the Rb normal optical selection of rubidium gas is utilized An excited by a VHF generator Rb 87 spectral filtered through a Rb 85 gas cell sends light into a Rb 87 resonance cell which is located in the cavity as shown in Fig This light caused by a so called pumping that Rb atoms are raised einern of Low energy state E1 to a drift much higher level E3 From there
3. ate time switch 12 Advertisement 7th 1x10 11 capture range 500 Hz Gate 10 S relative measure display 7th 1x10 12 Fangbereisch 50 Hz Gate 100 S ad 6th place 1x10 12 capture range 5 Hz Other frequencies have to be tting and or multiplication brought to 5 Mhz With enough levels and operate within the area covered flashing LED 6 middle Item D t Clock set switch 13 aug TIME SET including seconds 7 and 8 with START 10 and minutes shall continue then hours Here for example 1 minutes and turn with pretend switch 13 to count Clock starts kokk Crystal oscillator center settings have been made in the factory 16 and is engaged with det AFC switched 15 All inputs and outputs in Russian BNC connectors The second pulses to socket 20 and the frequency output to the terminals 17 10 5 1 and 0 1 Mhz are st n conditions at 3 to 5 Vpp Subject to change without notice
4. out 120 min at 2x10 11 Betreibsarten Key 5 function selection loop Pos A display off item B time difference Post C Frequenzeabweichung item D Clock 3xLED Control 6 display the data in the display 11 Item A Off Seven segment display of all outputs but in operation Item B At Time difference measurement Second pulses at the back entrance Eingangsschaiter 21 22 EXT Difference is displayed in microseconds Leitzte point 0 1 ms With START will spend 17 4 microseconds long second pulses with 5V and female 19 Ansteigzeit 30 ns Jack 20 time shifted second pulses with 5 V supply The input switch 22 to INT the difference in 0 1 microseconds is read When switching from switch 14 10 Hz output 0 1 microseconds The setting of the shifted second pulse to the internal or ext second pulses kan be changed via the keys 7 and 8 With START 10 3 packages are selected coarse medium fine with overflow The adjustment is faster when it is activated only to 10 Hz Reciprocal input If the time setting works With external measurement of the initial value is to write down and calculate the difference in later Abel Sung Display last digit 0 1 microseconds The harmonic meetings Synchronisatio is pressing key 9 and 10 Item C DELTA F f Device works as a frequency counter with 5 MHz center frequency Input jack on the back 18 Level 0 2 to 5 Vpp 50 Ohm BNC connector 1 sec g
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