Build fine on Ubuntu 11.04This night I will try to calibrate my laptop soundcard with my dektop PC which is calibrated to WWV
73 El 21/09/11 19:12, w1hkj escribió:
http://www.w1hkj.com/alpha/fldigi/ WWV xmt mode * Added sound card time tick transmit Here is a macro which demonstrates how to use the WWV mode to transmit time ticks. ===========snip========== <MODEM:NULL> <!QSY:1802.0:1000> <!MODEM:CW><!WPM:18>QST de <MYCALL> 1 min time tick cal run follows de <MYCALL> <!MODEM:NULL><!IDLE:2> <!MODEM:WWV><!IDLE:60> <!MODEM:NULL><!IDLE:2> <!MODEM:CW>QST de <MYCALL> end of cal run de <MYCALL> k <TX><RX> ===========snip========== Change the <!QSY line (or delete it). You might want to substitute <!GOFREQ:1000> Sends a CW preamble announcing a 1 minute time tick calibration run Sends time ticks for 1 minute. The pulses are 200 msec in duration with 4 msec leading and trailing edges. The pulse modulates a 1000 Hz audio sub carrier. Sends a CW postample announcing the end of the calibration run. Usage: Master station calibrates the sound card to WWV on 5, 10 or 15 MHz (or the Euro / Asian counterpart). Master sends a long time tick transmission which is copied by all other stations that want to be synchronized to the Master station. The receiving stations copy the transmission just as if it were from WWV. The calibration procedure is identical. This can be used to assist VHF/UHF FM stations who do not have an HF receiver to use for the WWV calibration of the sound card clock. The sound card clock's error in ppm is measured by comparing receiving the once per second tick signal and adjusting for no slant on the WWV scope display. I've posted an example wav for you to listen to: http://www.w1hkj.com/alpha/fldigi/timetick.wav 73, Dave, W1HKJ _______________________________________________ fldigi-alpha mailing list [email protected] https://lists.berlios.de/mailman/listinfo/fldigi-alpha
-- Pavel Milanes Costa Consultor Informático Consultores Asociados S.A. (CONAS), sucursal Camagüey. Telef: (32) 29-6344"Utilizamos Open Source en nuestros servidores porque es una manera más de controlar nuestro propio destino."
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