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GPS にロックした基準発振器の試作 2017.03.27 …

1 GPS JA1 VCW JJY GPS GPS 10 MHz 10 MHz GPS 1pps 10 MHz 10 MHz GPS 10kHz PLL 10 MHz 1pps GPS 1pps 1pps OCXO GPS 1pps = 1 1 1pps 1 10ns 10ns 1 = 1E-8 GYSFDMAXB 1/N 1/N 1pps N 10ns 1pps 1E-8 200 5E-11 OCXO 10,000, 2,000,000,000 @200 OCXO 10 MHz OCXO OCXO 200 1 OCXO OCXO OCXO

1 gps にロックした基準発振器の試作 2017.03.27 ja1vcw /(0!" 01 23 #4 5 65+ ., 7 89 jjy :;<=<>?@ab cd e fgh ijdkl23

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Transcription of GPS にロックした基準発振器の試作 2017.03.27 …

1 1 GPS JA1 VCW JJY GPS GPS 10 MHz 10 MHz GPS 1pps 10 MHz 10 MHz GPS 10kHz PLL 10 MHz 1pps GPS 1pps 1pps OCXO GPS 1pps = 1 1 1pps 1 10ns 10ns 1 = 1E-8 GYSFDMAXB 1/N 1/N 1pps N 10ns 1pps 1E-8 200 5E-11 OCXO 10,000, 2,000,000,000 @200 OCXO 10 MHz OCXO OCXO 200 1 OCXO OCXO OCXO 2 Counter 10.

2 0 0 MHz * 10 MHz 12bit control1ppsGPS moduleN 1/N1/N Hz N=200 200 OCXO 3 OCXO OCXO OCXO CPU CPU ATmega64 CPU ATmega328 IO ATmega64 16bit 2 1 CPU 1 CPU CPU 16 MHz 10 MHz 1/2 CPU 1bit +16bit CPU +15bit 1/2 17bit 1 131072 10 MHz overflow 13ms 1pps 1pps bit BASCOMAVR Dword 4byte 32bit Long 32bit long 2,147,483,647 10 MHz 1 2,147,483,647 /10,000,000 214s DA DAC 12bit I2C 12bit OCXO <2mA op-amp Low noise IC HC.

3 AC HCT 3Vp-p 50 2SK195 FET AC +13V +15V + 12V SW mHz 200 Gate LSB 1E-9 4 1pps N =N OCXO 1 N+1 Gate D-FF 1pps open close N N DAC N 200 200 200 1ppsGateN = N N = N Gate openGate open LCD 16bit Timer1) OCXO10 MHzControlDAC12bitDAcontolATmega64 GateDclQ QCK1ppsDclQ QCK1/2 IIIOO 15bitI5 MHz76 HzI2 CbusODrive Buffer-ampGate D-FF5 1pps 1pps up Enucntr= Enucntr+1 Enucntr n Gate Lo 1pps Enucntr n+1 n >0 <0 DAC OCXO Enucntr= 0 etc.

4 DFFD Hi GPS 1pps 4 DAC DAC LCD DAC 1pps GPS- GPS- GPS- up SW 1pps Gate Enucntr01nn-16 AVR BASCOM_AVR 5kbyte BASCOM_AVR Rb Rb Rb 1 1*1E-10 5*1E-10 Rb Rb F HP-53131A option Ext Reference Rb Rb Reference SSG MG3641A OCXO Rb F 1 Reference SSG HP-53131A F Ext Reference10 MHz Ch1_input1M ACHigh sense 1 1 7 Rb F F 10 000 000 000 0 Hz Rb 10 MHz F 10 100 min/mean/max Reference )HP-53131A F Ext Reference10 MHzCh1_input 1M (1.

5 1 ON => 1 => 1 24 2 2 Hz F F 1 F 1 off 15 9 999 999 Hz + 992 Hz => 9 999 999 992 Hz F F Reference max (Hz)mean (Hz)min (Hz)max-min1 10 000 19 999 999 999 97 9 999 999 999 22 10 000 19 999 999 999 98 9 999 999 999 2 (min)max (Hz)min (Hz)max (Hz)min (Hz) 3 Gate time : 1secGate time : 10sec8 F 1 0 DAC 0 . 5 8 m Hz 2 0 1 70 2 2 4F Rb 1 0 M Hz t i m e (m Hz)(m i n )m axm e anm i n09 3 . 19 2 . 7 39 2 . 1 1 79 2 . 59 2 . 1 19 1 . 81 0 1 0 0 3 49 2 . 29 1 . 8 59 1 . 6m ax/ m e an / m i n 5 19 2.

6 19 1 . 9 09 1 . 5F 6 89 2 . 49 1 . 9 09 1 . 41 7 09 3 . 99 3 . 5 49 3 . 2 1 8 79 4 . 39 3 . 5 19 3 . 0 9 3 . 0 = > 9 9 9 9 9 9 9 . 993 093 093 093 0 Hz2 0 49 4 . 49 3 . 2 09 2 . 82 2 19 3 . 39 2 . 9 09 2 . 53 0 79 4 . 09 3 . 6 09 3 . 23 2 49 4 . 39 3 . 7 89 3 . 33 4 19 3 . 99 3 . 4 29 2 . 94 9 39 3 . 29 2 . 8 59 2 . 65 1 09 3 . 09 2 . 6 09 2 . 35 2 79 3 . 19 2 . 8 09 2 . 59 2 99 7 . 89 7 . 5 09 7 . 01 0 2 19 7 . 39 6 . 8 59 6 . 21 0 4 99 6 . 49 5 . 8 89 5 . 51 5 4 49 5 . 29 4 . 8 99 4 . 61 5 6 19 5 . 39 4 . 9 29 4 . 51 5 7 89 5 . 09 4 . 6 09 4 . 2 m Hz m axm e anm i n m i n 0 2 0 0 4 0 0 6 0 0 8 0 0 1 0 0 0 1 2 0 0 1 4 0 0 1 6 0 0 1 8 0 0 2/24 14:40 start 0 MHz DAC F 10 100 max mean min F Rb F Ext Reference 9 DAC 0.

7 5 8 m Hz SSG OCXO(se c ) Hz (se c ) Hz (se c ) Hz (se c ) Hz 2 20 . 0 2 4 22 8 60 . 0 2 4 85 5 00 . 0 2 5 48 1 40 . 0 2 5 44 40 . 0 2 4 23 0 80 . 0 2 4 85 7 20 . 0 2 4 78 3 60 . 0 2 5 46 60 . 0 2 4 23 3 00 . 0 2 4 85 9 40 . 0 2 4 88 5 80 . 0 2 5 48 80 . 0 2 4 33 5 20 . 0 2 5 36 1 60 . 0 2 4 88 8 00 . 0 2 5 41 1 00 . 0 2 4 33 7 40 . 0 2 5 36 3 80 . 0 2 4 91 3 20 . 0 2 4 83 9 60 . 0 2 5 36 6 00 . 0 2 4 91 5 40 . 0 2 4 94 1 80 . 0 2 5 36 8 20 . 0 2 4 81 7 60 . 0 2 4 94 4 00 . 0 2 5 37 0 40 . 0 2 4 81 9 80 . 0 2 4 94 6 20 . 0 2 5 47 2 60 . 0 2 4 82 2 00 . 0 2 4 94 8 40 . 0 2 5 47 4 80 . 0 2 4 72 4 20 . 0 2 4 95 0 60 . 0 2 5 37 7 00 . 0 2 5 42 6 40 . 0 2 4 85 2 80 . 0 2 5 47 9 20 . 0 2 5 4 0 04 0 06 0 08 0 01 0 0 0 DAC OCXO DAC 201 22 9,999,999 000Hz Hz 9,999, F Reference SSG OCXO 10 F 10 100 max mean min F Rb F Ext Reference F 1 0 DAC 0.

8 5 8 m Hz 2 0 1 7 0 2 2 8F Rb 1 0 M Hz t i m e (m Hz)(m i n )m axm e anm i n09 4 . 39 3 . 7 99 3 . 0 1 79 4 . 79 3 . 9 49 3 . 11 0 1 0 0 3 49 4 . 19 3 . 1 69 2 . 2m ax/ m e an / m i n 5 19 3 . 69 2 . 4 39 1 . 6F 1 8 79 3 . 19 1 . 6 89 0 . 52 0 49 3 . 39 2 . 2 49 0 . 8 3 8 99 3 . 69 1 . 9 39 0 . 3 9 3 . 0 = > 9 9 9 9 9 9 9 . 993 093 093 093 0 Hz4 0 69 4 . 09 2 . 2 19 0 . 34 2 39 2 . 89 1 . 4 09 0 . 14 4 09 4 . 09 2 . 9 69 1 . 75 4 09 4 . 59 3 . 2 69 2 . 29 2 59 4 . 29 3 . 4 79 2 . 79 4 29 4 . 39 2 . 8 89 1 . 79 5 99 3 . 39 1 . 6 09 0 . 31 0 6 19 3 . 09 2 . 5 59 1 . 81 0 7 89 4 . 09 2 . 5 59 1 . 01 0 9 59 3 . 39 2 . 2 29 0 . 8 m Hz m axm e anm i n m i n 0 2 0 0 4 0 0 6 0 0 8 0 0 1 0 0 0 1 2 0 0 11 Rb spec 10 MHz -8mHz 4mHz 10 MHz 12mHz => *1E-9 spec spec 4mHz -8mHz OCXO DAC 1pps 200 F DAC

9 0 58mHz 1 1 3 OCXO OCXO DAC 150 150* 20 30 1E-9 1pps 10kHz PLL 12 8mHz 8mHz Rb F GPS 1pps 8mHz 5mHz 8mHz Rb Rb Rb 5*10E-11 5 spec 1mHz F 1pps OCXO DAC 20 000 000 00 reference Rb GPS Rb 8mHz offset 13 200 1 DAC 200 1 DAC 10 GPS min4 1pps

10 DAC 12bit ATmega64 CPU 16bit PWM 16bit DAC ATmega328 16bit 1 AVR Basic BASCOM_AVR 16bit PWM 10bit PWM BASCOM_AVR GPS Lock ebay 20k 30k spec GPS 10k 5*1E-8 *1E-9 1 10 14 GPS CPU ATmega64 + OCXO OCXO +12V 15 C 138mA 112mA 110mA 100 LCD GPS CPU ATmega328 1 OCXONDK 9140A-CEE70 OM GPS ATmega64 OCXO


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