{"id":236770,"date":"2024-10-19T15:27:29","date_gmt":"2024-10-19T15:27:29","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-60444-82017\/"},"modified":"2024-10-25T10:05:05","modified_gmt":"2024-10-25T10:05:05","slug":"bs-en-60444-82017","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-60444-82017\/","title":{"rendered":"BS EN 60444-8:2017"},"content":{"rendered":"

This part of IEC 60444 describes test fixtures suitable for leadless surface mounted quartz crystal units in enclosures as defined in IEC 61837 (all parts). These fixtures allow the measurement of (series) resonance frequency, (series) resonance resistance, and equivalent electrical circuit parameters L<\/i>1<\/sub>, C<\/i>1<\/sub> and C<\/i>0<\/sub> using the measurement techniques specified in IEC 60444-5 and for the determination of load resonance frequency and load resonance resistance according to IEC TR 60444-4 and IEC 60444-11.<\/p>\n

Two test fixtures are described in this document:<\/p>\n

    \n
  1. \n

    A fixture using the \u03c0-network circuit with electrical values as described in IEC 60444-1 for measurements in transmission mode up to 500 MHz. This fixture includes optional means to add physical load capacitors for the measurement of load resonance parameters up to 30 MHz in accordance with IEC 60444-4. The range of load capacitance is 10 pF or more. Calibration of the measurement system and C<\/i>L<\/sub> adapter board is explained hereinafter.<\/p>\n<\/li>\n

  2. \n

    A fixture based on the reflection method, suitable for a frequency range up to 1 200 MHz. No provisions for adding a physical load capacitance are anticipated. Load resonance parameters can be measured by using the method of IEC 60444-11.<\/p>\n<\/li>\n<\/ol>\n

    PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
    2<\/td>\nNational foreword <\/td>\n<\/tr>\n
    5<\/td>\nAnnex ZA(normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n
    7<\/td>\nEnglish
    CONTENTS <\/td>\n<\/tr>\n
    8<\/td>\nFOREWORD <\/td>\n<\/tr>\n
    10<\/td>\nINTRODUCTION <\/td>\n<\/tr>\n
    11<\/td>\n1 Scope
    2 Normative references
    3 Specifications
    4 Leadless surface mounted quartz crystal units
    4.1 Enclosure <\/td>\n<\/tr>\n
    12<\/td>\n4.2 Overtone and frequency range
    5 Specifications of measurement method, test fixture
    5.1 Specifications of measurement method
    5.2 Specifications of transmission test fixture
    Figures
    Figure 1 – Transmission π-network test fixture: Simplified equivalent circuit diagram, frequency range from 1 MHz to 500 MHz
    Figure 2 – Transmission π-network test Fixture with physical load capacitors: simplified equivalent circuit, frequency range from 1 MHz to 30 MHz <\/td>\n<\/tr>\n
    13<\/td>\nFigure 3 – Transmission π-network test fixture:Three-dimensional projection for the test fixture <\/td>\n<\/tr>\n
    14<\/td>\nFigure 4 – Transmission π-network test fixture: Mechanical design of the test fixture <\/td>\n<\/tr>\n
    15<\/td>\n5.3 Specifications of reflection test fixture
    Figure 5 – Transmission π-network test fixture with physical load capacitors:Structure of the test fixture <\/td>\n<\/tr>\n
    16<\/td>\nFigure 6 – Design of the reflection test fixture <\/td>\n<\/tr>\n
    18<\/td>\n5.4 Measuring equipment
    6 Calibration
    6.1 Calibration of the transmission test system
    6.2 Additional calibration of the transmission test system with CL adapter board
    6.3 Calibration of the reflection measurement system
    Figure 7 – Mechanical details of the reflection test fixture <\/td>\n<\/tr>\n
    19<\/td>\nFigure 8 – Calibration technique for the reflection test fixture <\/td>\n<\/tr>\n
    20<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

    Measurement of quartz crystal unit parameters – Test fixture for surface mounted quartz crystal units<\/b><\/p>\n\n\n\n\n
    Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
    BSI<\/b><\/a><\/td>\n2017<\/td>\n22<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":236774,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-236770","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/236770","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/236774"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=236770"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=236770"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=236770"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}