Deprecated: htmlspecialchars(): Passing null to parameter #1 ($string) of type string is deprecated in /customers/c/d/b/jvmv2.se/httpd.www/daniel/forum/includes/entry.inc.php on line 252 Warning: Cannot modify header information - headers already sent by (output started at /customers/c/d/b/jvmv2.se/httpd.www/daniel/forum/includes/entry.inc.php:252) in /customers/c/d/b/jvmv2.se/httpd.www/daniel/forum/index.php on line 217 Warning: Cannot modify header information - headers already sent by (output started at /customers/c/d/b/jvmv2.se/httpd.www/daniel/forum/includes/entry.inc.php:252) in /customers/c/d/b/jvmv2.se/httpd.www/daniel/forum/index.php on line 218 SJ driftradio / trafikradio / tågradio - 2008 - 2023 års Järnvägshistoriska forum

SJ driftradio / trafikradio / tågradio (Arkiv/forskning/litteratur)

av Göran Kannerby, Wednesday, January 18, 2023, 20:59 (868 dagar sedan) @ Anders_W

Minns någon vilket frekvensband som SJ:s driftradio använde?

Finns det månne några tekniska beskrivningar av systemet?

Här hittar jag en uppgift om att basstations- och länkfrekvenserna är mellan 370 och 470 MHz. Vet inte om frekvensen från själva apparaterna avviker från det.

Hela tråden:

 

Time: 228
SELECT COUNT(*) FROM mlf2_entries LEFT JOIN mlf2_akismet_rating ON mlf2_akismet_rating.eid = mlf2_entries.id LEFT JOIN mlf2_b8_rating ON mlf2_b8_rating.eid = mlf2_entries.id WHERE pid = 0 AND (mlf2_akismet_rating.spam = 0 AND mlf2_b8_rating.spam = 0) AND category IN (0, 4, 5, 6, 7, 8, 9, 25, 14, 23, 19, 22, 24, 10, 21, 11, 12, 13, 15, 16, 26, 18, 20, 27)

Time: 987
SELECT COUNT(*) FROM mlf2_entries LEFT JOIN mlf2_akismet_rating ON mlf2_akismet_rating.eid = mlf2_entries.id LEFT JOIN mlf2_b8_rating ON mlf2_b8_rating.eid = mlf2_entries.id WHERE (mlf2_akismet_rating.spam = 1 OR mlf2_b8_rating.spam = 1)
Time: 1172
SELECT COUNT(*) FROM mlf2_entries LEFT JOIN mlf2_akismet_rating ON mlf2_akismet_rating.eid = mlf2_entries.id LEFT JOIN mlf2_b8_rating ON mlf2_b8_rating.eid = mlf2_entries.id WHERE category IN (0, 4, 5, 6, 7, 8, 9, 25, 14, 23, 19, 22, 24, 10, 21, 11, 12, 13, 15, 16, 26, 18, 20, 27) AND (mlf2_akismet_rating.spam = 0 AND mlf2_b8_rating.spam = 0)

Total time: 2414

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