- pracovn\u00ed rozsah 0,5 – 470MHz, krok po 5kHz<\/li>
- sign\u00e1lovou \u00farove\u0148 lze nastavit mezi -70dBm a\u017e -131dBm <\/li>
- vestav\u011bn\u00fd modula\u010dn\u00ed gener\u00e1tor (CTCSS, 1kHz, 2kHz, 3kHz)<\/li><\/ul>\n\n\n\n
Gener\u00e1tor p\u0159ijde na cca 1900,-k\u010d \/ 95,-USD, objednal jsem jej 3. ledna a 26.\u00fanora kone\u010dn\u011b p\u0159i\u0161el (zdr\u017een\u00ed p\u0159es \u010c\u00ednsk\u00fd nov\u00fd rok). Nikde na internetu jsem nena\u0161el detailn\u011bj\u0161\u00ed popis vnit\u0159n\u00edho uspo\u0159\u00e1d\u00e1n\u00ed, a proto\u017ee u\u017e moje babi\u010dka \u0159\u00edkala, \u017ee se mus\u00edm v\u0161emu „pod\u00edvat na st\u0159eva“, p\u00ed\u0161u tento \u010dl\u00e1nek:) V\u011b\u0159\u00edm, \u017ee n\u011bkomu p\u0159inese ty informace, kter\u00e9 jsem j\u00e1 jinde nenalezl.<\/p>\n\n\n\n
Samo\u0159ejm\u011b m\u011b zaj\u00edmalo, jak je gener\u00e1tor konstruk\u010dn\u011b (kvalitativn\u011b) \u0159e\u0161en\u00fd, jak\u00e9 obvody jsou pou\u017eity, jak \u010dist\u00e9 m\u00e1 spektrum, jak stabiln\u00ed bude a dal\u0161\u00ed.<\/p>\n\n\n\n
![\"\"](\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2019\/02\/Gen_front-1600x1200.jpg\")
<\/a><\/figure><\/li>![\"\"](\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2019\/02\/Gen_back-1600x1200.jpg\")
<\/a><\/figure><\/li>![\"\"](\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2019\/02\/Gen_display-1600x1200.jpg\")
<\/a><\/figure><\/li><\/ul>\n\n\n\nGener\u00e1tor je vestav\u011bn\u00fd v mal\u00e9 plastov\u00e9 bed\u00fdnce. Nap\u00e1jen\u00ed m\u00e1 \u0159e\u0161en\u00e9 extern\u011b, prost\u0159ednictv\u00edm dutinkov\u00e9ho konektoru na zadn\u00edm panelu. Nap\u00e1jec\u00ed nap\u011bt\u00ed je 12V, spot\u0159eba pak cca 120mA.<\/p>\n\n\n\n
Na p\u0159edn\u00edm panelu je um\u00edst\u011bn hlavn\u00ed vyp\u00edna\u010d-isostat, maticov\u00fd displej 2×16 znak\u016f, kl\u00e1vesnice 4×4 tla\u010d\u00edtka a BNC konektor.
<\/p>\n\n\n\n![\"\"](\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2019\/02\/Gen_inside1-1600x1200.jpg\")
<\/a><\/figure><\/li>![\"\"](\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2019\/02\/Gen_board_bot-1600x1200.jpg\")
<\/a><\/figure><\/li>![\"\"](\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2019\/02\/Gen_board_detail-1600x1200.jpg\")
<\/a><\/figure><\/li><\/ul>\n\n\n\nUvnit\u0159 se nach\u00e1z\u00ed krom\u011b desky displeje s kl\u00e1vesnic\u00ed u\u017e jen „z\u00e1kladn\u00ed“ modul. Srdcem cel\u00e9ho gener\u00e1toru je transceiver AT1846S<\/strong> \/ RDA1846S vyr\u00e1b\u011bn\u00fd spole\u010dnost\u00ed Auctus Technologies. Ten je pou\u017eit nap\u0159\u00edklad i v ru\u010dn\u00ed radiostanici Baofeng UV-5RB \ud83d\ude42<\/p>\n\n\n\n
![\"\"](\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2019\/03\/Blok_sch_gen-1600x1131.jpg\")
<\/a><\/figure><\/li>![\"\"](\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2019\/02\/Gen_board_detail_popis-1600x1200.jpg\")
<\/a><\/figure><\/li><\/ul>\n\n\n\nTransceiver AT-1846S je \u0159\u00edzen mn\u011b nezn\u00e1m\u00fdm procesorem STS15W413, ten jej ovl\u00e1d\u00e1 pomoc\u00ed s\u00e9riov\u00e9 linky. D\u00e1le m\u00e1 miktroprocesor k dispozici EEPROM pam\u011b\u0165 o velikosti 16kB, kam se ukl\u00e1daj\u00ed provozn\u00ed data. Jako interface pak slou\u017e\u00ed maticov\u00fd displej 2×16 znak\u016f a kl\u00e1nesnice 4×4 tla\u010d\u00edtka.<\/p>\n\n\n\n
Pro \u0159\u00edzen\u00ed \u00farovn\u011b sign\u00e1lu je za vys\u00edla\u010dem v\u0159azena dvojice prom\u011bnn\u00fdch atenu\u00e1tor\u016f, 4 bitov\u00fd AT-200 s \u00fatlumem 0-30dB a 5 bitov\u00fd AT-260 s \u00fatlumem 0-31dB. Celkem tedy dostaneme dynamiku \u00farovn\u011b v\u00fdstupn\u00edho sign\u00e1lu 61dB<\/strong>.<\/p>\n\n\n\n
Kmito\u010dtov\u00e1 p\u0159esnost je +-100Hz<\/strong>, co\u017e je vzhledem k minim\u00e1ln\u00edmu kroku 5kHz dosta\u010duj\u00edc\u00ed.
<\/p>\n\n\n\n![\"\"](\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2019\/02\/145MHz_Phase_noise.png\")
<\/a><\/figure><\/li><\/ul>\n\n\n\nGener\u00e1tor m\u00e1 p\u0159ekvapiv\u011b n\u00edzk\u00fd f\u00e1zov\u00fd \u0161um ve vzd\u00e1lenosti 30Hz od nosn\u00e9 -71,6dBc.<\/strong>
<\/p>\n\n\n\n![\"\"](\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2019\/02\/Harmonics2.png\")
<\/a><\/figure><\/li>![\"\"](\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2019\/02\/Harmonics1.png\")
<\/a><\/figure><\/li>![\"\"](\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2019\/02\/800MHz_test.png\")
<\/a><\/figure><\/li><\/ul>\n\n\n\n\u010cistota okoln\u00edho spektra u\u017e tak dobr\u00e1 nen\u00ed, dokonce se zde objevuj\u00ed parazitn\u00ed sign\u00e1ly i +20dB nad \u00farovn\u00ed „hlavn\u00ed“ nosn\u00e9. Jsou v\u0161ak zpravidla dostate\u010dn\u011b daleko vzd\u00e1leny a pro \u00fa\u010dely pou\u017eit\u00ed nevad\u00ed.<\/p>\n\n\n\n
Kmito\u010dtov\u00fd rozsah je ud\u00e1v\u00e1n 0,5-470MHz, to je pravda. Av\u0161ak p\u0159i kmito\u010dtech ni\u017e\u0161\u00edch ne\u017e 3,5MHz a vy\u0161\u0161\u00edch ne\u017e 500MHz pad\u00e1 v\u00fdstupn\u00ed \u00farove\u0148 a\u017e o cca 18dB<\/strong>. Maxim\u00e1ln\u00ed provozn\u00ed kmito\u010det, i kdy\u017e se sn\u00ed\u017eenou intenzitou, pak je 800MHz<\/strong>.
<\/p>\n\n\n\n![\"\"](\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2019\/02\/Airspy_Tone-1600x841.png\")
<\/a><\/figure><\/li>![\"\"](\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2019\/02\/Airspy_CTCSS-1600x840.png\")
<\/a><\/figure><\/li>![\"\"](\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2019\/02\/Airspy_DCS-1600x838.png\")
<\/a><\/figure><\/li><\/ul>\n\n\n\nGener\u00e1tor m\u016f\u017ee b\u00fdt modulov\u00e1n n\u00edzkofrekven\u010dn\u00edm sign\u00e1lem, v p\u0159edvolb\u00e1ch jsou kmito\u010dty 1\/2\/3kHz, CTCSS, dokonce i DCS. DCS se mi ale da\u0159ilo dek\u00f3dovat obt\u00ed\u017en\u011b, prodejce ostatn\u011b DCS ani nikde neuv\u00e1d\u00ed.<\/p>\n\n\n\n
<\/p>\n\n\n\n
P\u0159esnost amplitudy:<\/h2>\n\n\n\n
- V\u0161echna m\u011b\u0159en\u00ed byla prov\u00e1d\u011bna p\u0159\u00ed nap\u00e1jec\u00edm nap\u011bt\u00ed U=12V.<\/li><\/ul>\n\n\n\n
![\"\"](\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2019\/02\/Gen_measure-1600x1200.jpg\")
<\/a><\/figure>\n\n\n\n\n\n
\n\t \nRBW 300Hz
\nSpan 25kHz<\/th>FSH8<\/th> FSH8<\/th> FSH8<\/th> FSH8<\/th> FSH8<\/th> FSH8<\/th> FSH8<\/th> FSH8<\/th> FSH8<\/th>\n<\/tr>\n<\/thead>\n \n\t \u00dadaj gener\u00e1toru<\/td> 435
\nMHz<\/td>145
\nMHz<\/td>70
\nMHz<\/td>28
\nMHz<\/td>14
\nMHz<\/td>7
\nMHz<\/td>3.5
\nMHz<\/td>1.8
\nMHz<\/td>100
\nMHz<\/td>\n<\/tr>\n\n\t -70<\/td> -73.6<\/td> -73.3<\/td> -71.6<\/td> -72.3<\/td> -72<\/td> -72.9<\/td> -75.5<\/td> -82.9<\/td> -70.3<\/td>\n<\/tr>\n \n\t -71<\/td> -75<\/td> -74.7<\/td> -72.9<\/td> -73.4<\/td> -73.4<\/td> -74.2<\/td> -76.8<\/td> -84.3<\/td> -71.6<\/td>\n<\/tr>\n \n\t -72<\/td> -75.8<\/td> -75.4<\/td> -73.6<\/td> -74.1<\/td> -74<\/td> -74.9<\/td> -77.3<\/td> -84.8<\/td> -72.3<\/td>\n<\/tr>\n \n\t -73<\/td> -77<\/td> -76.5<\/td> -74.7<\/td> -75.1<\/td> -75.1<\/td> -76<\/td> -78.5<\/td> -86.4<\/td> -73.4<\/td>\n<\/tr>\n \n\t -74<\/td> -77.7<\/td> -77.3<\/td> -75.6<\/td> -76.2<\/td> -75.9<\/td> -76.7<\/td> -78.9<\/td> -86.3<\/td> -74.4<\/td>\n<\/tr>\n \n\t -75<\/td> -78.9<\/td> -78.5<\/td> -76.8<\/td> -77.2<\/td> -77.1<\/td> -77.9<\/td> -80.2<\/td> -87.9<\/td> -75.5<\/td>\n<\/tr>\n \n\t -76<\/td> -79.6<\/td> -79.2<\/td> -77.5<\/td> -78<\/td> -77.9<\/td> -78.6<\/td> -80.8<\/td> -88.5<\/td> -76.3<\/td>\n<\/tr>\n \n\t -77<\/td> -80.8<\/td> -80.3<\/td> -78.5<\/td> -78.9<\/td> -79<\/td> -79.7<\/td> -82<\/td> -90<\/td> -77.3<\/td>\n<\/tr>\n \n\t -78<\/td> -82.3<\/td> -81.6<\/td> -79.7<\/td> -80.2<\/td> -80.1<\/td> -81.1<\/td> -83.6<\/td> -92<\/td> -78.6<\/td>\n<\/tr>\n \n\t -79<\/td> -83.3<\/td> -82.6<\/td> -80.7<\/td> -81.1<\/td> -81.2<\/td> -82.1<\/td> -84.8<\/td> -93.4<\/td> -79.6<\/td>\n<\/tr>\n \n\t -80<\/td> -84.2<\/td> -83.4<\/td> -81.5<\/td> -81.9<\/td> -82<\/td> -82.9<\/td> -85.5<\/td> -94<\/td> -80.3<\/td>\n<\/tr>\n \n\t -81<\/td> -85.2<\/td> -84.3<\/td> -82.5<\/td> -82.8<\/td> -83<\/td> -83.9<\/td> -86.6<\/td> -95.2<\/td> -81.3<\/td>\n<\/tr>\n \n\t -82<\/td> -86.2<\/td> -85.4<\/td> -83.5<\/td> -84.1<\/td> -84<\/td> -84.9<\/td> -87.4<\/td> -95.8<\/td> -82.5<\/td>\n<\/tr>\n \n\t -83<\/td> -87.3<\/td> -86.5<\/td> -84.7<\/td> -85.1<\/td> -85.1<\/td> -86<\/td> -88.6<\/td> -97.2<\/td> -83.5<\/td>\n<\/tr>\n \n\t -84<\/td> -88.2<\/td> -87.3<\/td> -85.4<\/td> -85.9<\/td> -85.9<\/td> -86.8<\/td> -89.3<\/td> -97.8<\/td> -84.3<\/td>\n<\/tr>\n \n\t -85<\/td> -89.2<\/td> -88.3<\/td> -86.4<\/td> -86.8<\/td> -87<\/td> -87.9<\/td> -90.5<\/td> -99.2<\/td> -85.3<\/td>\n<\/tr>\n \n\t -86<\/td> -90.1<\/td> -89.3<\/td> -87.5<\/td> -88<\/td> -87.8<\/td> -88.7<\/td> -91.2<\/td> -99.3<\/td> -86.4<\/td>\n<\/tr>\n \n\t -87<\/td> -91.2<\/td> -90.4<\/td> -88.6<\/td> -89<\/td> -89<\/td> -89.9<\/td> -92.4<\/td> -100.8<\/td> -87.5<\/td>\n<\/tr>\n \n\t -88<\/td> -92.1<\/td> -91.2<\/td> -89.3<\/td> -89.8<\/td> -89.8<\/td> -90.6<\/td> -93.1<\/td> -101.6<\/td> -88.3<\/td>\n<\/tr>\n \n\t -89<\/td> -93<\/td> -92.2<\/td> -90.4<\/td> -90.8<\/td> -90.9<\/td> -91.7<\/td> -94.3<\/td> -103<\/td> -89.3<\/td>\n<\/tr>\n \n\t -90<\/td> -94.2<\/td> -93.2<\/td> -91.3<\/td> -91.9<\/td> -91.7<\/td> -92.6<\/td> -95.1<\/td> -103.2<\/td> -90.3<\/td>\n<\/tr>\n \n\t -91<\/td> -95.2<\/td> -94.3<\/td> -92.4<\/td> -92.9<\/td> -92.9<\/td> -93.8<\/td> -96.3<\/td> -104.5<\/td> -91.4<\/td>\n<\/tr>\n \n\t -92<\/td> -95.9<\/td> -95.1<\/td> -93.2<\/td> -93.7<\/td> -93.6<\/td> -94.6<\/td> -97.2<\/td> -105.5<\/td> -92.2<\/td>\n<\/tr>\n \n\t -93<\/td> -97<\/td> -96.1<\/td> -94.2<\/td> -94.7<\/td> -94.8<\/td> -95.7<\/td> -98.1<\/td> -107<\/td> -93.2<\/td>\n<\/tr>\n \n\t -94<\/td> -98<\/td> -97.3<\/td> -95.3<\/td> -95.9<\/td> -95.8<\/td> -96.7<\/td> -99.2<\/td> -108<\/td> -94.4<\/td>\n<\/tr>\n \n\t -95<\/td> -99.2<\/td> -98.3<\/td> -96.3<\/td> -96.8<\/td> -97<\/td> -97.8<\/td> -100.3<\/td> -109<\/td> -95.3<\/td>\n<\/tr>\n \n\t -96<\/td> -100.1<\/td> -99.1<\/td> -97.1<\/td> -97.7<\/td> -97.7<\/td> -98.6<\/td> -101.1<\/td> -109.4<\/td> -96.1<\/td>\n<\/tr>\n \n\t -97<\/td> -101<\/td> -100.1<\/td> -98.1<\/td> -98.6<\/td> -98.8<\/td> -99.5<\/td> -102.2<\/td> -110.1<\/td> -97.1<\/td>\n<\/tr>\n \n\t -98<\/td> -101.8<\/td> -101.1<\/td> -99.2<\/td> -99.7<\/td> -99.7<\/td> -100.5<\/td> -103.1<\/td> -111.3<\/td> -98.2<\/td>\n<\/tr>\n \n\t -99<\/td> -103.1<\/td> -102.2<\/td> -100.3<\/td> -100.8<\/td> -100.8<\/td> -101.7<\/td> -104.2<\/td> -112.6<\/td> -99.3<\/td>\n<\/tr>\n \n\t -100<\/td> -103.8<\/td> -103<\/td> -101.2<\/td> -101.5<\/td> -101.6<\/td> -102.4<\/td> -105.1<\/td> -113<\/td> -100.1<\/td>\n<\/tr>\n \n\t -101<\/td> -105.8<\/td> -104.8<\/td> -102.8<\/td> -103.2<\/td> -103.2<\/td> -103.4<\/td> -106.3<\/td> -114.8<\/td> -101.8<\/td>\n<\/tr>\n \n\t -102<\/td> -106.7<\/td> -105.3<\/td> -103.5<\/td> -104<\/td> -104<\/td> -104.8<\/td> -107<\/td> -115<\/td> -102.5<\/td>\n<\/tr>\n \n\t -103<\/td> -107.8<\/td> -106.6<\/td> -104.5<\/td> -105<\/td> -105<\/td> -105.6<\/td> -108<\/td> -116.2<\/td> -103.6<\/td>\n<\/tr>\n \n\t -104<\/td> -108.5<\/td> -107.4<\/td> -105.5<\/td> -106.1<\/td> -106<\/td> -106.6<\/td> -108.8<\/td> -116.4<\/td> -104.6<\/td>\n<\/tr>\n \n\t -105<\/td> -109.8<\/td> -108.8<\/td> -106.6<\/td> -107.2<\/td> -107<\/td> -107.5<\/td> -109.9<\/td> -117.4<\/td> -105.8<\/td>\n<\/tr>\n \n\t -106<\/td> -110.5<\/td> -109.4<\/td> -107.3<\/td> -108<\/td> -107.9<\/td> -108.5<\/td> -110.3<\/td> -117.2<\/td> -106.5<\/td>\n<\/tr>\n \n\t -107<\/td> -111.5<\/td> -110.3<\/td> -108.6<\/td> -108.9<\/td> -108.9<\/td> -109.4<\/td> -111.5<\/td> -118.2<\/td> -107.5<\/td>\n<\/tr>\n \n\t -108<\/td> -112.5<\/td> -111.4<\/td> -109.5<\/td> -110.3<\/td> -110.1<\/td> -110.6<\/td> -112.5<\/td> <\/td> -108.7<\/td>\n<\/tr>\n \n\t -109<\/td> -113.7<\/td> -112.6<\/td> -110.7<\/td> -111.1<\/td> -111.2<\/td> -111.8<\/td> -113.4<\/td> <\/td> -109.6<\/td>\n<\/tr>\n \n\t -110<\/td> -114.6<\/td> -113.3<\/td> -111.3<\/td> -112<\/td> -111.9<\/td> -112.5<\/td> -114.3<\/td> <\/td> -110.6<\/td>\n<\/tr>\n \n\t -111<\/td> -115.5<\/td> -114.2<\/td> -112.3<\/td> -113<\/td> -112.7<\/td> -113.3<\/td> -115.8<\/td> <\/td> -111.5<\/td>\n<\/tr>\n \n\t -112<\/td> -116.6<\/td> -115.3<\/td> -113.3<\/td> -113.9<\/td> -113.7<\/td> -114.5<\/td> -116.3<\/td> <\/td> -112.5<\/td>\n<\/tr>\n \n\t -113<\/td> -117.2<\/td> -116.3<\/td> -114.2<\/td> -114.9<\/td> -114.7<\/td> -115.2<\/td> -117.1<\/td> <\/td> -113.6<\/td>\n<\/tr>\n \n\t -114<\/td> -118.5<\/td> -117.3<\/td> -115<\/td> -116<\/td> -115.5<\/td> -116.3<\/td> -118.2<\/td> <\/td> -114.5<\/td>\n<\/tr>\n \n\t -115<\/td> -119.1<\/td> -118.2<\/td> -116<\/td> -117<\/td> -116.2<\/td> -117<\/td> -119<\/td> <\/td> -115.3<\/td>\n<\/tr>\n \n\t -116<\/td> -120.2<\/td> -119.1<\/td> -117.1<\/td> -117.8<\/td> -116.9<\/td> -118<\/td> <\/td> <\/td> -116.3<\/td>\n<\/tr>\n \n\t -117<\/td> -120.8<\/td> -120.1<\/td> -118.2<\/td> -118.5<\/td> -117.8<\/td> -118.7<\/td> <\/td> <\/td> -117.5<\/td>\n<\/tr>\n \n\t -118<\/td> -121.2<\/td> -121<\/td> -118.8<\/td> -119<\/td> -118.8<\/td> -119.2<\/td> <\/td> <\/td> -118.4<\/td>\n<\/tr>\n \n\t -119<\/td> -122.5<\/td> -121.9<\/td> -119.9<\/td> -120<\/td> -119.9<\/td> -120<\/td> <\/td> <\/td> -119.2<\/td>\n<\/tr>\n \n\t -120<\/td> -123.2<\/td> -122<\/td> -120.5<\/td> -120.8<\/td> -120.5<\/td> -120.6<\/td> <\/td> <\/td> -120.3<\/td>\n<\/tr>\n \n\t -121<\/td> -124.1<\/td> -123.2<\/td> -121.2<\/td> -121.5<\/td> -121.1<\/td> -121.3<\/td> <\/td> <\/td> -121.5<\/td>\n<\/tr>\n \n\t -122<\/td> <\/td> -124.1<\/td> -122.2<\/td> -122.4<\/td> -122<\/td> -122<\/td> <\/td> <\/td> -122.2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n ![\"\"](\"https:\/\/ok2haz.ok2kld.cz\/ok2haz\/wp-content\/uploads\/2019\/03\/Generator_graf_kmitoc_char.png\")
<\/a><\/figure>\n\n\n\nZ tabulky a grafu vid\u00edme, \u017ee gener\u00e1tor pod\u00e1v\u00e1 pon\u011bkud ni\u017e\u0161\u00ed \u00farove\u0148, ne\u017e je ve specifikaci. Maxim\u00e1ln\u00ed intenzita tedy nen\u00ed -70dBm, ale cca -73dBm – v z\u00e1vislosti na zvolen\u00e9m kmito\u010dtu. Nejl\u00e9pe hodnoty odpov\u00eddaj\u00ed p\u0159i kmito\u010dtu f=100MHz, z\u0159ejm\u011b zde byla provedena kalibrace. Pod f=3MHz pak pod\u00e1v\u00e1 sign\u00e1l v\u00fdrazn\u011b slab\u0161\u00ed.<\/p>\n\n\n\n
Videorecenze:<\/h2>\n\n\n\n