en:gpsdo
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— | en:gpsdo [2014/02/20 15:34] – [Device construction] kaklik | ||
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+ | ====== Precise frequency and clock signal generator GPSDO01A ====== | ||
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+ | This design is focused to generating precise frequency signal with good long term stability for laboratory use. (As frequency and time normal GPS satellite clocks are used) | ||
+ | This design is bypass product of developing [[en:rmds]] and [[cs: | ||
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+ | {{ : | ||
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+ | The output frequency can be stabilized anywhere in 10-810 MHz range. | ||
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+ | ===== Device construction ===== | ||
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+ | {{ : | ||
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+ | Device consist following modules: | ||
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+ | * [[en: | ||
+ | * [[en: | ||
+ | * [[en: | ||
+ | * [[cs: | ||
+ | * [[cs:gps]] | ||
+ | * [[cs: | ||
+ | * [[cs: | ||
+ | * [[cs:lts]] | ||
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+ | ===== Function principle ===== | ||
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+ | Source of high frequency signal is free-running oscillator Si570 in module [[en: | ||
+ | Interval of measurement is variable. Basic measurement calculates with one second τ interval. (period of [[cs: | ||
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+ | Measured data are stored in MCU memory and can be read by I²C interface. This is usually operated by host computer which computes frequency correction and apply a new frequency to si570 chip oscillator. | ||
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+ | Frequency correction method is in principle software defined and AVAR characteristics of this frequency generator system can be adjusted to meet application requirements. | ||
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+ | ===== Related pages ===== | ||
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+ | * [[cs: | ||
+ | * [[cs: | ||
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+ | ===== References ===== | ||
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+ | * [[http:// | ||
+ | * [[http:// | ||
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en/gpsdo.txt · Last modified: 2014/05/06 22:40 (external edit)