Wirtualny Oddział Terenowy Polskiego Związku Krótkofalowców (OT-73). Witamy!
kwiecień 03, 2025

Pomiary indukcyjności "L"

Na oddziałowym forum dyskusyjnym czasem toczą się ciekawe dyskusje, dotyczące różnych tematów związanych z krótkofalarstwem. Jednym z dyskutowanych ostatnio (w połowie czerwca 2024) tematów były pomiary indukcyjności oraz przyrządy wykorzystywane do takich pomiarów.

Dyskusję zainicjował Rafał SQ5OUO, który przedstawił pomiary indukcyjności (L) wykonane miernikiem LC-200A.

 

W dyskusji wziął udział Marcin SP5IOU, który poinformował, że także posiada miernik LC-200A, ale jednocześnie zasugerował, że do celów radiowych pomiary parametry R, L, C komponentów lepiej wykonywać za pomocą analizatora VNA. Zaletą VNA jest możliwość wykonania pomiaru dla zakresu częstotliwości, w jakim ma dany element pracować.

Marcin od niedawna wykorzystuje Lite VNA 64, wersję rozszerzoną nanoVNA. Najbardziej użytecznym rozszerzeniem jest zwiększenie liczby próbek do 1000. Poprzednie modele miały 100 a później 200 próbek, co zmuszało do dokonywania kalibracji dla węższych zakresów, np dla pasm. Obecnie można zrobić dwie kalibrację np  1 - 15 MHz i 15 - 30 MHz, co daje próbkę co 14 , 15 KHz, więc jest to wystarczająca gęstość do zdejmowania charakterystyk anten. W dodatku przyrząd ma kartę SD i można mieć pod ręką wiele kalibracji.
Dodatkowe, może mniej istotna cechy, to możliwość pomiarów do 6GHz, większy display i więcej różnych funkcji pomiarowych, n. wynik w postać paralel lub serial L, C, i też R, więc jest to też miernik RLC.

Taki analizator kosztuje w około 700PLN w sklepie producenta. Zdaniem Marcina SP5IOU jest znacznie lepszy niż dwa poprzednie modele.

W toku dyskusji Marcin zauważył, że raczej kondensatorów o dużej pojemności - elektrolitów raczej się tą metodą nie zmierzy. Raczej elementy RLC dla częstotliwości radiowych.

W toku dyskusji padło pytanie: Jaka jest najprostsza metoda zmierzenia cewki (L)? Włączyć na zaciski i zmierzyć?

Rada Marcina jest następująca:

W zasadzie tak, tylko ustawić CW na częstotliwość dla której chcemy parametr zmierzyć i wybrać format wyświetlania S11 na serial lub paralel L dla cewki, lub C dla kondensatora. Miernik LC-200A jakoś dobiera sobie częstotliwość pomiaru. Patrzyłem dla cewki o indukcyjności ok 200nH to było 640KHz. VNA mierzy od 50 czy 100KHz, więc można stworzyć podobne warunki. Fajnie na VNA widać że cewka ma ujemną pojemność jak się wybierze format C. Za pomocą LC-200A dobierałem indukcyjność cewek wydłużających antenę KF i działało, ale myślę że do takich pomiarów czy też elementów filtrów w,cz to raczej VNA. Tu widać wszystko np. do jakiej częstotliwości kondensator jest kondensatorem a od jakiej zaczyna być cewką :).

No i kabelek z krokodylkami trzeba sobie dorobić.

Ostatnio eksperymentowałem użycie VNA jako GDO i daje się. Sprzęgacz w postaci kilku zwojów nawiniętych na palcu i znów pomiar S11 w formacie logmag. Tylko trzeba ustawić dość małą skalę, aby było widać dip. 

Nie zaprzeczam że do prostych pomiarów - testowania komponentów przed wlutowaniem w płytkę LC-200A może być wygodniejszy, jakkolwiek wygodniejsze do tego są testery elementów. Są tanie. Mam kilka różnych, też taki co ma w sobie prosty oscyloskop, generator, tester niektórych czujników. Do eksperymentów z Arduino, czy montażu układów bardzo wygodny. Najnowszy który mam to DSO-TC3, ale mam go już trochę czasu. Testery nie są bardzo dokładnymi przyrządami, ale do powyższych zastosowań w zupełności wystarczające, a wygoda duża. Wtykasz element i po chwili wiesz czy to opornik, cewka, kondensator czy dioda a dla trójników jaki tranzystor FET, MOSFET czy może triak.

Dokonałem pomiarów porównawczych za pomocą LiteVNA i LC-200A. Zacząłem od cewki powietrznej o średnicy 23mm, długość 9mm, 4 zwoje. Według geometrii taka cewka ma indukcyjność 430nH. Ta moja ma jeszcze druty doprowadzające, wiec ma trochę więcej. LC-200A próbował to zmierzyć na F= 632KHz i dał wynik 230nH.

VNA przy tej samej częstotliwości pokazał 828 nH - widać że ta częstotliwość jest zbyt mała dla wiarygodnych pomiarów takiej cewki. Dopiero przy 10MHz VNA pokazał  wiarygodny wynik 477nH.

Następnie mierzyłem większą cewkę i obydwa przyrządy pokazały bardzo podobnie 24uH. Częstotliwość jaką LC-200A ostawił to 532KHz.

Ta cewka mierzona przy 5MHz dała wynik 36uH, a na 10MHz indukcyjność była ujemna, gdyż reaktancję zdominowała pojemność cewki.

Ta cewka to wariometr, więc ustawiłem ją na 5.6uH przy 10MHz. LC200A pokazał 5uH przy 4.7uH przy 612KHz, więc pojedyncza uH da się mierzyć. VNA dla tej częstotliwości pokazał indukcyjność 5.2uH.

53.921MBMemory Usage558msRequest Duration
Joomla! Version5.2.3
PHP Version8.2.21
Identityguest
Response200
Templatejl_zmagazine_pro
Database
Server
mysql
Version
8.0.31-23
Collation
utf8mb4_polish_ci
Conn Collation
utf8mb4_0900_ai_ci
$_GET
[]
$_POST
[]
$_SESSION
array:1 [ "joomla" => "***redacted***" ]
$_COOKIE
[]
$_SERVER
array:74 [ "UNIQUE_ID" => "Z-4nU1wEgesxjCG8Cum4hAAAAAQ" "HTTP_AUTHORIZATION" => "" "HTTPS" => ...
session
array:3 [ "counter" => 1 "timer" => array:3 [ "start" => 1743660883 "last" => 1743660883...
registry
array:3 [ "data" => [] "initialized" => false "separator" => "." ]
user
array:21 [ "id" => 0 "name" => null "username" => null "email" => null "password" => "***r...
  • afterLoad (3.77MB) (31.57ms)
  • afterInitialise (7.64MB) (79.85ms)
  • afterRoute (4.48MB) (62.06ms)
  • beforeRenderComponent com_content (426.4KB) (5.64ms)
  • Before Access::preloadComponents (all components) (487.89KB) (5.12ms)
  • After Access::preloadComponents (all components) (137.8KB) (2.17ms)
  • Before Access::preloadPermissions (com_content) (1.73KB) (24μs)
  • After Access::preloadPermissions (com_content) (131.93KB) (1.81ms)
  • Before Access::getAssetRules (id:329 name:com_content.article.163) (6.65KB) (26μs)
  • After Access::getAssetRules (id:329 name:com_content.article.163) (92.52KB) (406μs)
  • afterRenderComponent com_content (5.9MB) (98.77ms)
  • afterDispatch (4.23KB) (305μs)
  • beforeRenderRawModule mod_gantry5_particle (Date) (17.63MB) (132ms)
  • afterRenderRawModule mod_gantry5_particle (Date) (149.57KB) (2.5ms)
  • beforeRenderModule mod_gantry5_particle (Date) (720B) (8μs)
  • afterRenderModule mod_gantry5_particle (Date) (20.48KB) (692μs)
  • afterRender (9.31MB) (132ms)
  • 1 x beforeRenderRawModule mod_gantry5_particle (Date) (17.63MB) (23.7%)
    132ms
    1 x afterRender (9.31MB) (23.62%)
    132ms
    1 x afterRenderComponent com_content (5.9MB) (17.69%)
    98.77ms
    1 x afterInitialise (7.64MB) (14.3%)
    79.85ms
    1 x afterRoute (4.48MB) (11.11%)
    62.06ms
    1 x afterLoad (3.77MB) (5.65%)
    31.57ms
    1 x beforeRenderComponent com_content (426.4KB) (1.01%)
    5.64ms
    1 x Before Access::preloadComponents (all components) (487.89KB) (0.92%)
    5.12ms
    1 x afterRenderRawModule mod_gantry5_particle (Date) (149.57KB) (0.45%)
    2.50ms
    1 x After Access::preloadComponents (all components) (137.8KB) (0.39%)
    2.17ms
    1 x After Access::preloadPermissions (com_content) (131.93KB) (0.32%)
    1.81ms
    1 x afterRenderModule mod_gantry5_particle (Date) (20.48KB) (0.12%)
    692μs
    1 x After Access::getAssetRules (id:329 name:com_content.article.163) (92.52KB) (0.07%)
    406μs
    1 x afterDispatch (4.23KB) (0.05%)
    305μs
    1 x Before Access::getAssetRules (id:329 name:com_content.article.163) (6.65KB) (0%)
    26μs
    1 x Before Access::preloadPermissions (com_content) (1.73KB) (0%)
    24μs
    1 x beforeRenderModule mod_gantry5_particle (Date) (720B) (0%)
    8μs
54 statements were executed, 14 of which were duplicates, 40 unique57.05ms209.98KB
  • SELECT @@SESSION.sql_mode;165μs968B/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php:308Copy
  • SELECT `data` FROM `uon3_session` WHERE `session_id` = ?244μs1008BParams/libraries/vendor/joomla/session/src/Handler/DatabaseHandler.php:250Copy
  • SELECT `session_id` FROM `uon3_session` WHERE `session_id` = :session_id LIMIT 1223μs1.3KBParams/libraries/src/Session/MetadataManager.php:187Copy
  • INSERT INTO `uon3_session` (`session_id`,`guest`,`time`,`userid`,`username`,`client_id`) VALUES (:session_id, :guest, :time, :user_id, :username, :client_id)1.07ms944BParams/libraries/src/Session/MetadataManager.php:260Copy
  • SELECT `extension_id` AS `id`,`element` AS `option`,`params`,`enabled` FROM `uon3_extensions` WHERE `type` = 'component' AND `state` = 0 AND `enabled` = 1989μs17.73KB/libraries/src/Component/ComponentHelper.php:399Copy
  • SELECT `id`,`rules` FROM `uon3_viewlevels`358μs656B/libraries/src/Access/Access.php:955Copy
  • SELECT `b`.`id` FROM `uon3_usergroups` AS `a` LEFT JOIN `uon3_usergroups` AS `b` ON `b`.`lft` <= `a`.`lft` AND `b`.`rgt` >= `a`.`rgt` WHERE `a`.`id` = :guest681μs1.33KBParams/libraries/src/Access/Access.php:868Copy
  • SELECT `folder` AS `type`,`element` AS `name`,`params` AS `params`,`extension_id` AS `id` FROM `uon3_extensions` WHERE `enabled` = 1 AND `type` = 'plugin' AND `state` IN (0,1) AND `access` IN (:preparedArray1,:preparedArray2) ORDER BY `ordering`2.28ms3.98KBParams/libraries/src/Plugin/PluginHelper.php:294Copy
  • SELECT `m`.`id`,`m`.`menutype`,`m`.`title`,`m`.`alias`,`m`.`note`,`m`.`link`,`m`.`type`,`m`.`level`,`m`.`language`,`m`.`browserNav`,`m`.`access`,`m`.`params`,`m`.`home`,`m`.`img`,`m`.`template_style_id`,`m`.`component_id`,`m`.`parent_id`,`m`.`path` AS `route`,`e`.`element` AS `component` FROM `uon3_menu` AS `m` LEFT JOIN `uon3_extensions` AS `e` ON `m`.`component_id` = `e`.`extension_id` WHERE ( (`m`.`published` = 1 AND `m`.`parent_id` > 0 AND `m`.`client_id` = 0) AND (`m`.`publish_up` IS NULL OR `m`.`publish_up` <= :currentDate1)) AND (`m`.`publish_down` IS NULL OR `m`.`publish_down` >= :currentDate2) ORDER BY `m`.`lft`2.25ms36.8KBParams/libraries/src/Menu/SiteMenu.php:166Copy
  • SELECT `c`.`id`,`c`.`asset_id`,`c`.`access`,`c`.`alias`,`c`.`checked_out`,`c`.`checked_out_time`,`c`.`created_time`,`c`.`created_user_id`,`c`.`description`,`c`.`extension`,`c`.`hits`,`c`.`language`,`c`.`level`,`c`.`lft`,`c`.`metadata`,`c`.`metadesc`,`c`.`metakey`,`c`.`modified_time`,`c`.`note`,`c`.`params`,`c`.`parent_id`,`c`.`path`,`c`.`published`,`c`.`rgt`,`c`.`title`,`c`.`modified_user_id`,`c`.`version`, CASE WHEN CHAR_LENGTH(`c`.`alias`) != 0 THEN CONCAT_WS(':', `c`.`id`, `c`.`alias`) ELSE `c`.`id` END as `slug` FROM `uon3_categories` AS `s` INNER JOIN `uon3_categories` AS `c` ON (`s`.`lft` <= `c`.`lft` AND `c`.`lft` < `s`.`rgt`) OR (`c`.`lft` < `s`.`lft` AND `s`.`rgt` < `c`.`rgt`) WHERE (`c`.`extension` = :extension OR `c`.`extension` = 'system') AND `c`.`published` = 1 AND `s`.`id` = :id ORDER BY `c`.`lft`2.14ms3.88KBParams/libraries/src/Categories/Categories.php:375Copy
  • SELECT `id` FROM `uon3_content` WHERE `alias` = :segment AND `catid` = :id444μs1.34KBParams/components/com_content/src/Service/Router.php:263Copy
  • SELECT `id`,`home`,`template`,`s`.`params`,`inheritable`,`parent` FROM `uon3_template_styles` AS `s` LEFT JOIN `uon3_extensions` AS `e` ON `e`.`element` = `s`.`template` AND `e`.`type` = 'template' AND `e`.`client_id` = `s`.`client_id` WHERE `s`.`client_id` = 0 AND `e`.`enabled` = 11.34ms944B/administrator/components/com_templates/src/Model/StyleModel.php:775Copy
  • SELECT s.id, s.template, s.home, s.title AS long_title, s.params FROM uon3_template_styles AS s WHERE s.client_id = 0 AND s.template = 'jl_zmagazine_pro' ORDER BY s.id542μs848B/libraries/gantry5/src/classes/Gantry/Joomla/StyleHelper.php:69Copy
  • SHOW FULL TABLES WHERE table_type="BASE TABLE"4.74ms2.56KB/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php:635Copy
  • SELECT * FROM `uon3_languages` WHERE `published` = 1 ORDER BY `ordering` ASC707μs1.59KB/libraries/src/Language/LanguageHelper.php:177Copy
  • SELECT `id`,`name`,`rules`,`parent_id` FROM `uon3_assets` WHERE `name` IN (:preparedArray1,:preparedArray2,:preparedArray3,:preparedArray4,:preparedArray5,:preparedArray6,:preparedArray7,:preparedArray8,:preparedArray9,:preparedArray10,:preparedArray11,:preparedArray12,:preparedArray13,:preparedArray14,:preparedArray15,:preparedArray16,:preparedArray17,:preparedArray18,:preparedArray19,:preparedArray20,:preparedArray21,:preparedArray22,:preparedArray23,:preparedArray24,:preparedArray25,:preparedArray26,:preparedArray27,:preparedArray28,:preparedArray29,:preparedArray30,:preparedArray31,:preparedArray32,:preparedArray33,:preparedArray34,:preparedArray35,:preparedArray36,:preparedArray37,:preparedArray38,:preparedArray39,:preparedArray40,:preparedArray41,:preparedArray42,:preparedArray43,:preparedArray44)1.46ms7.81KBParams/libraries/src/Access/Access.php:357Copy
  • SELECT `id`,`name`,`rules`,`parent_id` FROM `uon3_assets` WHERE `name` LIKE :asset OR `name` = :extension OR `parent_id` = 01.24ms6.73KBParams/libraries/src/Access/Access.php:301Copy
  • SHOW FULL COLUMNS FROM `uon3_content`3.86ms1.77KB/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php:587Copy
  • UPDATE `uon3_content` SET `hits` = (`hits` + 1) WHERE `id` = '163'925μs48B/libraries/src/Table/Table.php:1348Copy
  • SELECT `a`.`id`,`a`.`asset_id`,`a`.`title`,`a`.`alias`,`a`.`introtext`,`a`.`fulltext`,`a`.`state`,`a`.`catid`,`a`.`created`,`a`.`created_by`,`a`.`created_by_alias`,`a`.`modified`,`a`.`modified_by`,`a`.`checked_out`,`a`.`checked_out_time`,`a`.`publish_up`,`a`.`publish_down`,`a`.`images`,`a`.`urls`,`a`.`attribs`,`a`.`version`,`a`.`ordering`,`a`.`metakey`,`a`.`metadesc`,`a`.`access`,`a`.`hits`,`a`.`metadata`,`a`.`featured`,`a`.`language`,`fp`.`featured_up`,`fp`.`featured_down`,`c`.`title` AS `category_title`,`c`.`alias` AS `category_alias`,`c`.`access` AS `category_access`,`c`.`language` AS `category_language`,`fp`.`ordering`,`u`.`name` AS `author`,`parent`.`title` AS `parent_title`,`parent`.`id` AS `parent_id`,`parent`.`path` AS `parent_route`,`parent`.`alias` AS `parent_alias`,`parent`.`language` AS `parent_language`,ROUND(`v`.`rating_sum` / `v`.`rating_count`, 1) AS `rating`,`v`.`rating_count` AS `rating_count` FROM `uon3_content` AS `a` INNER JOIN `uon3_categories` AS `c` ON `c`.`id` = `a`.`catid` LEFT JOIN `uon3_content_frontpage` AS `fp` ON `fp`.`content_id` = `a`.`id` LEFT JOIN `uon3_users` AS `u` ON `u`.`id` = `a`.`created_by` LEFT JOIN `uon3_categories` AS `parent` ON `parent`.`id` = `c`.`parent_id` LEFT JOIN `uon3_content_rating` AS `v` ON `a`.`id` = `v`.`content_id` WHERE ( (`a`.`id` = :pk AND `c`.`published` > 0) AND (`a`.`publish_up` IS NULL OR `a`.`publish_up` <= :publishUp)) AND (`a`.`publish_down` IS NULL OR `a`.`publish_down` >= :publishDown) AND `a`.`state` IN (:preparedArray1,:preparedArray2)1.33ms22.13KBParams/components/com_content/src/Model/ArticleModel.php:215Copy
  • SELECT `c`.`id`,`c`.`asset_id`,`c`.`access`,`c`.`alias`,`c`.`checked_out`,`c`.`checked_out_time`,`c`.`created_time`,`c`.`created_user_id`,`c`.`description`,`c`.`extension`,`c`.`hits`,`c`.`language`,`c`.`level`,`c`.`lft`,`c`.`metadata`,`c`.`metadesc`,`c`.`metakey`,`c`.`modified_time`,`c`.`note`,`c`.`params`,`c`.`parent_id`,`c`.`path`,`c`.`published`,`c`.`rgt`,`c`.`title`,`c`.`modified_user_id`,`c`.`version`, CASE WHEN CHAR_LENGTH(`c`.`alias`) != 0 THEN CONCAT_WS(':', `c`.`id`, `c`.`alias`) ELSE `c`.`id` END as `slug` FROM `uon3_categories` AS `s` INNER JOIN `uon3_categories` AS `c` ON (`s`.`lft` <= `c`.`lft` AND `c`.`lft` < `s`.`rgt`) OR (`c`.`lft` < `s`.`lft` AND `s`.`rgt` < `c`.`rgt`) WHERE (`c`.`extension` = :extension OR `c`.`extension` = 'system') AND `c`.`access` IN (:preparedArray1,:preparedArray2) AND `c`.`published` = 1 AND `s`.`id` = :id ORDER BY `c`.`lft`1.31ms3.92KBParams/libraries/src/Categories/Categories.php:375Copy
  • SELECT `m`.`tag_id`,`t`.* FROM `uon3_contentitem_tag_map` AS `m` INNER JOIN `uon3_tags` AS `t` ON `m`.`tag_id` = `t`.`id` WHERE `m`.`type_alias` = :contentType AND `m`.`content_item_id` = :id AND `t`.`published` = 1 AND `t`.`access` IN (:preparedArray1,:preparedArray2)1.7ms4KBParams/libraries/src/Helper/TagsHelper.php:388Copy
  • SELECT id, link from uon3_menu WHERE link LIKE 'index.php?option=com_jdownloads&view=category%' AND published = 1632μs576B/plugins/content/jdownloads/jdownloads.php:76Copy
  • SELECT id, link, published, access, language FROM uon3_menu WHERE (link LIKE 'index.php?option=com_jdownloads%') AND published = 1 AND client_id = 0 AND language = 'pl-pl' AND access IN (1,5)421μs752B/components/com_jdownloads/src/Helper/JDHelper.php:246Copy
  • SELECT id, link, published, access, language FROM uon3_menu WHERE (link LIKE 'index.php?option=com_jdownloads%') AND published = 1 AND client_id = 0 AND access IN (1,5)741μs768B/components/com_jdownloads/src/Helper/JDHelper.php:251Copy
  • SELECT id FROM uon3_menu WHERE (link LIKE 'index.php?option=com_jdownloads&Itemid=' OR link LIKE 'index.php?option=com_jdownloads&view=categories' ) AND published = 1 AND client_id = 0 AND language = 'pl-pl' AND access IN (1,5)347μs520B/components/com_jdownloads/src/Helper/JDHelper.php:304Copy
  • SELECT id FROM uon3_menu WHERE (link LIKE 'index.php?option=com_jdownloads&Itemid=' OR link LIKE 'index.php?option=com_jdownloads&view=categories' ) AND published = 1 AND client_id = 0 AND access IN (1,5)662μs536B/components/com_jdownloads/src/Helper/JDHelper.php:309Copy
  • SELECT id FROM uon3_menu WHERE (link LIKE 'index.php?option=com_jdownloads&Itemid=' OR link LIKE 'index.php?option=com_jdownloads&view=categories' ) AND published = 1 AND client_id = 0 AND language = 'pl-pl' AND access IN (1,5)377μs520B/components/com_jdownloads/src/Helper/JDHelper.php:358Copy
  • SELECT id FROM uon3_menu WHERE (link LIKE 'index.php?option=com_jdownloads&Itemid=' OR link LIKE 'index.php?option=com_jdownloads&view=categories' ) AND published = 1 AND client_id = 0 AND access IN (1,5)654μs536B/components/com_jdownloads/src/Helper/JDHelper.php:363Copy
  • SELECT id FROM uon3_menu WHERE link = 'index.php?option=com_jdownloads&view=search' AND published = 1 AND client_id = 0 AND access IN (1,5)656μs520B/components/com_jdownloads/src/Helper/JDHelper.php:377Copy
  • SELECT id FROM uon3_menu WHERE link = 'index.php?option=com_jdownloads&view=form&layout=edit' AND published = 1 AND client_id = 0 AND access IN (1,5)619μs520B/components/com_jdownloads/src/Helper/JDHelper.php:382Copy
  • SELECT id, link from uon3_menu WHERE link LIKE 'index.php?option=com_jdownloads&view=category&catid%' AND published = 1 AND access IN (1,5)543μs576B/components/com_jdownloads/src/Helper/JDHelper.php:414Copy
  • SELECT `c`.`id`,`c`.`asset_id`,`c`.`access`,`c`.`alias`,`c`.`checked_out`,`c`.`checked_out_time`,`c`.`created_time`,`c`.`created_user_id`,`c`.`description`,`c`.`extension`,`c`.`hits`,`c`.`language`,`c`.`level`,`c`.`lft`,`c`.`metadata`,`c`.`metadesc`,`c`.`metakey`,`c`.`modified_time`,`c`.`note`,`c`.`params`,`c`.`parent_id`,`c`.`path`,`c`.`published`,`c`.`rgt`,`c`.`title`,`c`.`modified_user_id`,`c`.`version`, CASE WHEN CHAR_LENGTH(`c`.`alias`) != 0 THEN CONCAT_WS(':', `c`.`id`, `c`.`alias`) ELSE `c`.`id` END as `slug` FROM `uon3_categories` AS `s` INNER JOIN `uon3_categories` AS `c` ON (`s`.`lft` <= `c`.`lft` AND `c`.`lft` < `s`.`rgt`) OR (`c`.`lft` < `s`.`lft` AND `s`.`rgt` < `c`.`rgt`) WHERE (`c`.`extension` = :extension OR `c`.`extension` = 'system') AND `c`.`access` IN (:preparedArray1,:preparedArray2) AND `c`.`published` = 1 AND `s`.`id` = :id ORDER BY `c`.`lft`1.33ms6.42KBParams/libraries/src/Categories/Categories.php:375Copy
  • SELECT DISTINCT a.id, a.title, a.name, a.checked_out, a.checked_out_time, a.note, a.state, a.access, a.created_time, a.created_user_id, a.ordering, a.language, a.fieldparams, a.params, a.type, a.default_value, a.context, a.group_id, a.label, a.description, a.required, a.only_use_in_subform,l.title AS language_title, l.image AS language_image,uc.name AS editor,ag.title AS access_level,ua.name AS author_name,g.title AS group_title, g.access as group_access, g.state AS group_state, g.note as group_note FROM uon3_fields AS a LEFT JOIN `uon3_languages` AS l ON l.lang_code = a.language LEFT JOIN uon3_users AS uc ON uc.id=a.checked_out LEFT JOIN uon3_viewlevels AS ag ON ag.id = a.access LEFT JOIN uon3_users AS ua ON ua.id = a.created_user_id LEFT JOIN uon3_fields_groups AS g ON g.id = a.group_id LEFT JOIN `uon3_fields_categories` AS fc ON fc.field_id = a.id WHERE ( (`a`.`context` = :context AND (`fc`.`category_id` IS NULL OR `fc`.`category_id` IN (:preparedArray1,:preparedArray2,:preparedArray3)) AND `a`.`access` IN (:preparedArray4,:preparedArray5)) AND (`a`.`group_id` = 0 OR `g`.`access` IN (:preparedArray6,:preparedArray7)) AND `a`.`state` = :state) AND (`a`.`group_id` = 0 OR `g`.`state` = :gstate) AND `a`.`only_use_in_subform` = :only_use_in_subform ORDER BY a.ordering ASC1.1ms4.83KBParams/libraries/src/MVC/Model/BaseDatabaseModel.php:164Copy
  • SELECT `field_id`,`value` FROM `uon3_fields_values` WHERE `field_id` IN (:preparedArray1) AND `item_id` = :itemid477μs1.39KBParams/administrator/components/com_fields/src/Model/FieldModel.php:739Copy
  • SELECT `a`.`id`,`a`.`title`,`a`.`catid`,`a`.`language`, CASE WHEN CHAR_LENGTH(`a`.`alias`) != 0 THEN CONCAT_WS(':', `a`.`id`, `a`.`alias`) ELSE a.id END AS `slug`, CASE WHEN CHAR_LENGTH(`cc`.`alias`) != 0 THEN CONCAT_WS(':', `cc`.`id`, `cc`.`alias`) ELSE cc.id END AS `catslug` FROM `uon3_content` AS `a` LEFT JOIN `uon3_categories` AS `cc` ON `cc`.`id` = `a`.`catid` WHERE `a`.`catid` = :catid AND `a`.`state` = :state AND `a`.`access` IN (:preparedArray1,:preparedArray2) AND (`publish_up` IS NULL OR `publish_up` <= :nowDate1) AND (`publish_down` IS NULL OR `publish_down` >= :nowDate2) ORDER BY CASE WHEN `a`.`publish_up` IS NULL THEN `a`.`created` ELSE `a`.`publish_up` END DESC917μs1.81KBParams/plugins/content/pagenavigation/src/Extension/PageNavigation.php:188Copy
  • SELECT `c`.`id`,`c`.`asset_id`,`c`.`access`,`c`.`alias`,`c`.`checked_out`,`c`.`checked_out_time`,`c`.`created_time`,`c`.`created_user_id`,`c`.`description`,`c`.`extension`,`c`.`hits`,`c`.`language`,`c`.`level`,`c`.`lft`,`c`.`metadata`,`c`.`metadesc`,`c`.`metakey`,`c`.`modified_time`,`c`.`note`,`c`.`params`,`c`.`parent_id`,`c`.`path`,`c`.`published`,`c`.`rgt`,`c`.`title`,`c`.`modified_user_id`,`c`.`version`, CASE WHEN CHAR_LENGTH(`c`.`alias`) != 0 THEN CONCAT_WS(':', `c`.`id`, `c`.`alias`) ELSE `c`.`id` END as `slug` FROM `uon3_categories` AS `s` INNER JOIN `uon3_categories` AS `c` ON (`s`.`lft` <= `c`.`lft` AND `c`.`lft` < `s`.`rgt`) OR (`c`.`lft` < `s`.`lft` AND `s`.`rgt` < `c`.`rgt`) WHERE (`c`.`extension` = :extension OR `c`.`extension` = 'system') AND `c`.`access` IN (:preparedArray1,:preparedArray2) AND `c`.`published` = 1 AND `s`.`id` = :id ORDER BY `c`.`lft`1.16ms3.92KBParams/libraries/src/Categories/Categories.php:375Copy
  • SELECT `m`.`id`,`m`.`title`,`m`.`module`,`m`.`position`,`m`.`content`,`m`.`showtitle`,`m`.`params`,`mm`.`menuid` FROM `uon3_modules` AS `m` LEFT JOIN `uon3_modules_menu` AS `mm` ON `mm`.`moduleid` = `m`.`id` LEFT JOIN `uon3_extensions` AS `e` ON `e`.`element` = `m`.`module` AND `e`.`client_id` = `m`.`client_id` WHERE ( ( (`m`.`published` = 1 AND `e`.`enabled` = 1 AND `m`.`client_id` = :clientId AND `m`.`access` IN (:preparedArray1,:preparedArray2)) AND (`m`.`publish_up` IS NULL OR `m`.`publish_up` <= :publishUp)) AND (`m`.`publish_down` IS NULL OR `m`.`publish_down` >= :publishDown)) AND (`mm`.`menuid` = :itemId OR `mm`.`menuid` <= 0) ORDER BY `m`.`position`,`m`.`ordering`1.55ms1.86KBParams/libraries/src/Cache/Controller/CallbackController.php:120Copy
  • SELECT `a`.`menutype`,`a`.`title` FROM `uon3_menu_types` AS `a` WHERE `a`.`client_id` = 0353μs624B/libraries/gantry5/src/classes/Gantry/Framework/Menu.php:138Copy
  • SELECT m.id, m.alias, m.path AS route, m.level, m.parent_id FROM uon3_menu AS m WHERE m.menutype = 'mainmenu' AND m.parent_id > 0 AND m.client_id = 0 AND m.published >= 0 ORDER BY m.lft756μs1.48KB/libraries/gantry5/src/classes/Gantry/Framework/Menu.php:791Copy
  • SELECT `params` FROM `uon3_comprofiler_plugin` WHERE `id` = 1564μs536BCopy
  • SELECT * FROM `uon3_comprofiler_lists` WHERE `listid` = 12360μs1.28KBCopy
  • SELECT * FROM `uon3_comprofiler_lists` WHERE `listid` = 18472μs1.28KBCopy
  • SELECT * FROM `uon3_comprofiler_lists` WHERE `listid` = 7745μs1.28KBCopy
  • SELECT * FROM `uon3_comprofiler_lists` WHERE `listid` = 19375μs1.28KBCopy
  • SELECT * FROM `uon3_comprofiler_lists` WHERE `listid` = 8829μs1.28KBCopy
  • SELECT m.id, m.alias, m.path AS route, m.level, m.parent_id FROM uon3_menu AS m WHERE m.menutype = 'mainmenu' AND m.parent_id > 0 AND m.client_id = 0 AND m.published >= 0 ORDER BY m.lft917μs1.48KB/libraries/gantry5/src/classes/Gantry/Framework/Menu.php:791Copy
  • SELECT * FROM `uon3_schemaorg` WHERE `itemId` = :itemId AND `context` = :context504μs1.55KBParams/plugins/system/schemaorg/src/Extension/Schemaorg.php:403Copy
  • SELECT `a`.`id`,`a`.`asset_id`,`a`.`title`,`a`.`alias`,`a`.`introtext`,`a`.`fulltext`,`a`.`state`,`a`.`catid`,`a`.`created`,`a`.`created_by`,`a`.`created_by_alias`,`a`.`modified`,`a`.`modified_by`,`a`.`checked_out`,`a`.`checked_out_time`,`a`.`publish_up`,`a`.`publish_down`,`a`.`images`,`a`.`urls`,`a`.`attribs`,`a`.`version`,`a`.`ordering`,`a`.`metakey`,`a`.`metadesc`,`a`.`access`,`a`.`hits`,`a`.`metadata`,`a`.`featured`,`a`.`language`,`fp`.`featured_up`,`fp`.`featured_down`,`c`.`title` AS `category_title`,`c`.`alias` AS `category_alias`,`c`.`access` AS `category_access`,`c`.`language` AS `category_language`,`fp`.`ordering`,`u`.`name` AS `author`,`parent`.`title` AS `parent_title`,`parent`.`id` AS `parent_id`,`parent`.`path` AS `parent_route`,`parent`.`alias` AS `parent_alias`,`parent`.`language` AS `parent_language`,ROUND(`v`.`rating_sum` / `v`.`rating_count`, 1) AS `rating`,`v`.`rating_count` AS `rating_count` FROM `uon3_content` AS `a` INNER JOIN `uon3_categories` AS `c` ON `c`.`id` = `a`.`catid` LEFT JOIN `uon3_content_frontpage` AS `fp` ON `fp`.`content_id` = `a`.`id` LEFT JOIN `uon3_users` AS `u` ON `u`.`id` = `a`.`created_by` LEFT JOIN `uon3_categories` AS `parent` ON `parent`.`id` = `c`.`parent_id` LEFT JOIN `uon3_content_rating` AS `v` ON `a`.`id` = `v`.`content_id` WHERE ( (`a`.`id` = :pk AND `c`.`published` > 0) AND (`a`.`publish_up` IS NULL OR `a`.`publish_up` <= :publishUp)) AND (`a`.`publish_down` IS NULL OR `a`.`publish_down` >= :publishDown) AND `a`.`state` IN (:preparedArray1,:preparedArray2)1.22ms22.17KBParams/components/com_content/src/Model/ArticleModel.php:215Copy
  • SELECT `a`.`id`,`a`.`asset_id`,`a`.`title`,`a`.`alias`,`a`.`introtext`,`a`.`fulltext`,`a`.`state`,`a`.`catid`,`a`.`created`,`a`.`created_by`,`a`.`created_by_alias`,`a`.`modified`,`a`.`modified_by`,`a`.`checked_out`,`a`.`checked_out_time`,`a`.`publish_up`,`a`.`publish_down`,`a`.`images`,`a`.`urls`,`a`.`attribs`,`a`.`version`,`a`.`ordering`,`a`.`metakey`,`a`.`metadesc`,`a`.`access`,`a`.`hits`,`a`.`metadata`,`a`.`featured`,`a`.`language`,`fp`.`featured_up`,`fp`.`featured_down`,`c`.`title` AS `category_title`,`c`.`alias` AS `category_alias`,`c`.`access` AS `category_access`,`c`.`language` AS `category_language`,`fp`.`ordering`,`u`.`name` AS `author`,`parent`.`title` AS `parent_title`,`parent`.`id` AS `parent_id`,`parent`.`path` AS `parent_route`,`parent`.`alias` AS `parent_alias`,`parent`.`language` AS `parent_language`,ROUND(`v`.`rating_sum` / `v`.`rating_count`, 1) AS `rating`,`v`.`rating_count` AS `rating_count` FROM `uon3_content` AS `a` INNER JOIN `uon3_categories` AS `c` ON `c`.`id` = `a`.`catid` LEFT JOIN `uon3_content_frontpage` AS `fp` ON `fp`.`content_id` = `a`.`id` LEFT JOIN `uon3_users` AS `u` ON `u`.`id` = `a`.`created_by` LEFT JOIN `uon3_categories` AS `parent` ON `parent`.`id` = `c`.`parent_id` LEFT JOIN `uon3_content_rating` AS `v` ON `a`.`id` = `v`.`content_id` WHERE ( (`a`.`id` = :pk AND `c`.`published` > 0) AND (`a`.`publish_up` IS NULL OR `a`.`publish_up` <= :publishUp)) AND (`a`.`publish_down` IS NULL OR `a`.`publish_down` >= :publishDown) AND `a`.`state` IN (:preparedArray1,:preparedArray2)1.47ms22.17KBParams/components/com_content/src/Model/ArticleModel.php:215Copy
  • SELECT SUM(CASE WHEN `a`.`next_execution` <= :now THEN 1 ELSE 0 END) AS due_count,SUM(CASE WHEN `a`.`locked` IS NULL THEN 0 ELSE 1 END) AS locked_count FROM `uon3_scheduler_tasks` AS `a` WHERE `a`.`state` = 1643μs1.37KBParams/administrator/components/com_scheduler/src/Model/TasksModel.php:465Copy
  • SHOW FULL TABLES WHERE table_type="BASE TABLE"4.46ms2.56KB/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php:635Copy
  • SELECT `session_id` FROM `uon3_session` WHERE `session_id` = ?313μs1KBParams/libraries/vendor/joomla/session/src/Handler/DatabaseHandler.php:277Copy
  • UPDATE `uon3_session` SET `data` = ? , `time` = ? WHERE `session_id` = ?884μs592BParams/libraries/vendor/joomla/session/src/Handler/DatabaseHandler.php:301Copy