隨著智能手機與汽車的普及，人們越來越依賴于GPS導航定位系統(tǒng)，當我們拿起手機點外賣或者叫車服務的時候，APP可以很快定位到當時的位置，這就是手機內(nèi)置的GPS系統(tǒng)的作用。石英晶體振蕩器是GPS系統(tǒng)中常見的元器件之一，也是比較重要的一種，它保證了GPS系統(tǒng)信號傳輸，定位導航穩(wěn)定性，在汽車導航儀中也是同樣的功能。Silicon Labs公司是美國有名的GPS定時解決方案供應商，設計的多款GPS晶振在業(yè)界出名，并且被廣泛應用到GPS模塊，以下是Silicon Labs公司原廠編碼相關內(nèi)容。

510BBA156M250BAGR	Si510	156.25MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510BBA156M250BAGR	Si510	156.25MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510BBA156M250BAGR	Si510	156.25MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511FBA125M000BAG	Si511	125MHz	2.5V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511BBA100M000AAG	Si511	100MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511BBA148M500BAG	Si511	148.5MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511ABA156M250AAG	Si511	156.25MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511BBA200M000BAG	Si511	200MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
530FB125M000DG	Si530	125MHz	2.5V	±20ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531BB125M000DG	Si531	125MHz	3.3V	±20ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
530BB125M000DG	Si530	125MHz	3.3V	±20ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531FB200M000DG	Si531	200MHz	2.5V	±20ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
530FB200M000DG	Si530	200MHz	2.5V	±20ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
530BC156M250DG	Si530	156.25MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531FC250M000DG	Si531	250MHz	2.5V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511BBA100M000BAG	Si511	100MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510BBA125M000BAG	Si510	125MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511BBA125M000BAG	Si511	125MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511ABA100M000AAG	Si511	100MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511BBA000110BAG	Si511	148.35165MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511BBA148M500AAG	Si511	148.5MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511FBA200M000BAG	Si511	200MHz	2.5V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510BBA200M000BAG	Si510	200MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511FBA200M000AAG	Si511	200MHz	2.5V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511ABA25M0000BAG	Si511	25MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511FCA100M000BAG	Si511	100MHz	2.5V	±20ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511BCA100M000BAG	Si511	100MHz	3.3V	±20ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
530BA125M000DG	Si530	125MHz	3.3V	±50ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531FB125M000DG	Si531	125MHz	2.5V	±20ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
530BB100M000DG	Si530	100MHz	3.3V	±20ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
530FC156M250DG	Si530	156.25MHz	2.5V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510ABA125M000BAG	Si510	125MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511BBA74M2500BAG	Si511	74.25MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510BBA156M250BAG	Si510	156.25MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511ABA156M250BAG	Si511	156.25MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510FBA200M000BAG	Si510	200MHz	2.5V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510ABA200M000BAG	Si510	200MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
530FA156M250DG	Si530	156.25MHz	2.5V	±50ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531BC000110DG	Si531	148.35165MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
535FB125M000DG	Si535	125MHz	2.5V	±20ppm	6-SMD, No Lead	(7.00mm x 5.00mm)

        選擇正確的GPS定時解決方案對于4G基站的可靠性和性能至關重要。應考慮定時特性，信號可用性有限的GPS可靠性以及GPS信號丟失期間的保持特性.N定時接收機針對GPS信號條件有限的定時應用進行了優(yōu)化，如室內(nèi)，窗戶或部分遮擋觀點。

511BBA156M250AAG	Si511	156.25MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510FBA156M250AAG	Si510	156.25MHz	2.5V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511ABA155M520AAG	Si511	155.52MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510FBA148M500AAG	Si510	148.5MHz	2.5V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511BBA155M520AAG	Si511	155.52MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510BBA148M500AAG	Si510	148.5MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510ABA148M500AAG	Si510	148.5MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510DBA100M000AAG	Si510	100MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531AC125M000DG	Si531	125MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531FC125M000DG	Si531	125MHz	2.5V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
530AC156M250DG	Si530	156.25MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531FC156M250DG	Si531	156.25MHz	2.5V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531FC148M500DG	Si531	148.5MHz	2.5V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531AC155M520DG	Si531	155.52MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
530AC155M520DG	Si530	155.52MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531BC155M520DG	Si531	155.52MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531FC200M000DG	Si531	200MHz	2.5V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
530BC148M500DG	Si530	148.5MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
536EB156M250DG	Si536	156.25MHz	2.5V	±20ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
536BB125M000DG	Si536	125MHz	3.3V	±20ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531AC622M080DG	Si531	622.08MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531AC312M500DG	Si531	312.5MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510ABA000149BAG	Si510	74.175824MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510BBA000149BAG	Si510	74.175824MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511FBA000149BAG	Si511	74.175824MHz	2.5V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510ABA106M250BAG	Si510	106.25MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511ABA106M250BAG	Si511	106.25MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511FBA74M2500BAG	Si511	74.25MHz	2.5V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511ABA000149BAG	Si511	74.175824MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510FBA000149BAG	Si510	74.175824MHz	2.5V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510ABA74M2500BAG	Si510	74.25MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510FBA000149AAG	Si510	74.175824MHz	2.5V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510ABA125M000AAG	Si510	125MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510ABA106M250AAG	Si510	106.25MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511FBA106M250AAG	Si511	106.25MHz	2.5V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510ABA74M2500AAG	Si510	74.25MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511FBA000149AAG	Si511	74.175824MHz	2.5V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510BBA000149AAG	Si510	74.175824MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510ABA000149AAG	Si510	74.175824MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510FBA74M2500AAG	Si510	74.25MHz	2.5V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)

       GPS定時解決方案CW25-TIM GPS接收器模塊是一個小型表面貼裝模塊，尺寸僅為25mmx27mmx3mm，內(nèi)置數(shù)字控制石英振蕩器（NCO），可產(chǎn)生輸出頻率，GPS軟件由基帶處理器控制。CW25-TIM。自測模式允許接收器連續(xù)計算其地理位置10分鐘（NCO頻率在此期間有效，但相位誤差將相對于位置誤差波動）。

SI50122-A4-GM	SI50122-A4	100MHz	2.25 V ~ 3.63 V	+100ppm	10-VFDFN	(2.50mm x 2.00mm)
511ABA156M250AAGR	Si511	156.25MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511ABA156M250AAGR	Si511	156.25MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511ABA156M250AAGR	Si511	156.25MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
530FC125M000DG	Si530	125MHz	2.5V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531BC200M000DG	Si531	200MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531BC250M000DG	Si531	250MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
530AC622M080DG	Si530	622.08MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511FBA100M000BAG	Si511	100MHz	2.5V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511BBA106M250BAG	Si511	106.25MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510BBA156M250AAG	Si510	156.25MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510ABA156M250AAG	Si510	156.25MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531BC125M000DG	Si531	125MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
530AC125M000DG	Si530	125MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531FB106M250DG	Si531	106.25MHz	2.5V	±20ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531AC156M250DG	Si531	156.25MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531AC200M000DG	Si531	200MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531BC148M500DG	Si531	148.5MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
530AC200M000DG	Si530	200MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
530BC200M000DG	Si530	200MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531BC156M250DG	Si531	156.25MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
530FC200M000DG	Si530	200MHz	2.5V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
536BB156M250DG	Si536	156.25MHz	3.3V	±20ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
536FB156M250DG	Si536	156.25MHz	2.5V	±20ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
536AB156M250DG	Si536	156.25MHz	3.3V	±20ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510FBA125M000BAG	Si510	125MHz	2.5V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511BBA000149BAG	Si511	74.175824MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510FBA100M000BAG	Si510	100MHz	2.5V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511FBA106M250BAG	Si511	106.25MHz	2.5V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510BBA106M250BAG	Si510	106.25MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511BBA125M000AAG	Si511	125MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510BBA100M000AAG	Si510	100MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510BBA125M000AAG	Si510	125MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511FBA100M000AAG	Si511	100MHz	2.5V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511BBA106M250AAG	Si511	106.25MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511FBA148M500BAG	Si511	148.5MHz	2.5V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510FBA148M500BAG	Si510	148.5MHz	2.5V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511BBA156M250BAG	Si511	156.25MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511FBA156M250BAG	Si511	156.25MHz	2.5V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510BBA148M500BAG	Si510	148.5MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)

       在10分鐘的自我調查期之后，接收器將自動計算地理位置的平均值并將該值固定在接收器固件中，這允許更精確地控制NCO輸出頻率的相位誤差。更重要的是，接收器現(xiàn)在不再需要計算位置定位來更新NCO，這使得接收器可以保持高度準確的NCO輸出，甚至可以跟蹤到被跟蹤的一個衛(wèi)星。此功能意味著接收器必須完全忽略所有GPS衛(wèi)星以阻止NCO與GPS同步，這意味著可用作高度可靠的GPS同步源。

511ABA74M2500AAG	Si511	74.25MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510BBA106M250AAG	Si510	106.25MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511ABA000149AAG	Si511	74.175824MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510BBA74M2500AAG	Si510	74.25MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511FBA74M2500AAG	Si511	74.25MHz	2.5V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510FBA106M250AAG	Si510	106.25MHz	2.5V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511BBA000149AAG	Si511	74.175824MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510ABA155M520BAG	Si510	155.52MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510FBA155M520BAG	Si510	155.52MHz	2.5V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511FBA155M520BAG	Si511	155.52MHz	2.5V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510ABA000110BAG	Si510	148.35165MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511ABA000110BAG	Si511	148.35165MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511ABA148M500BAG	Si511	148.5MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511ABA155M520BAG	Si511	155.52MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510BBA000110BAG	Si510	148.35165MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510FBA000110BAG	Si510	148.35165MHz	2.5V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510BBA155M520BAG	Si510	155.52MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510FBA155M520AAG	Si510	155.52MHz	2.5V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510ABA000110AAG	Si510	148.35165MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510FBA000110AAG	Si510	148.35165MHz	2.5V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511FBA155M520AAG	Si511	155.52MHz	2.5V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510ABA155M520AAG	Si510	155.52MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511ABA148M500AAG	Si511	148.5MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511FBA148M500AAG	Si511	148.5MHz	2.5V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511FBA156M250AAG	Si511	156.25MHz	2.5V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510FBA212M500BAG	Si510	212.5MHz	2.5V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511FBA212M500BAG	Si511	212.5MHz	2.5V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510ABA212M500BAG	Si510	212.5MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
511ABA200M000BAG	Si511	200MHz	3.3V	±25ppm	6-SMD, No Lead	(5.00mm x 3.20mm)
510ABA212M500AAG	Si510	212.5MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510BBA212M500AAG	Si510	212.5MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510FBA212M500AAG	Si510	212.5MHz	2.5V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510FBA200M000AAG	Si510	200MHz	2.5V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
511ABA212M500AAG	Si511	212.5MHz	3.3V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510EBA125M000AAG	Si510	125MHz	2.5V	±25ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
510ACA47M2500AAG	Si510	47.25MHz	3.3V	±20ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
530AC106M250DG	Si530	106.25MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
530EC106M250DG	Si530	106.25MHz	2.5V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531AC106M250DG	Si531	106.25MHz	3.3V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)
531EC106M250DG	Si531	106.25MHz	2.5V	±7ppm	6-SMD, No Lead	(7.00mm x 5.00mm)