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| To: | [email protected] |
|---|---|
| Subject: | Re: LF: Slow PSK result |
| From: | [email protected] |
| Date: | Sat, 18 Feb 2006 17:15:52 EST |
| Delivery-date: | Sat, 18 Feb 2006 22:20:31 +0000 |
| Envelope-to: | [email protected] |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
|
Dear John and LF, based on an idea by Peter Martinez, I then tried to despread the PSK signal by multiplying with a 15+15 minute (+1, -1) sequence before doing the Fourier Transforms. This works as expected, splitting up the Loran carrier and focusing John's signal to the center frequency: The recording was done using the E-field channel of my normal colour-DF grabber hardware, ie. SSB receiver and standard soundcard. It might be worthwhile to add in 1 Hz reference lines by coupling GPS 1pps pulses into the RX input. One could then possibly use SpecLab's tracking function to compensate for the LO frequency drift, but I haven't tried this in such a configuration. John, are you intending to transmit again tonight? 73 de Markus, DF6NM
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