From dc38c1146eb9df97696d25ca9bace7886cc84afc Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A1s=20Retzler?= Date: Sat, 19 Mar 2016 21:03:32 +0100 Subject: [PATCH] Updated Using OpenWebRX with a real input signal (markdown) --- Using-OpenWebRX-with-a-real-input-signal.md | 13 ------------- ...enWebRX-with-the-audio-card-as-a-VLF-receiver.md | 12 ++++++++++++ 2 files changed, 12 insertions(+), 13 deletions(-) delete mode 100644 Using-OpenWebRX-with-a-real-input-signal.md create mode 100644 Using-OpenWebRX-with-the-audio-card-as-a-VLF-receiver.md diff --git a/Using-OpenWebRX-with-a-real-input-signal.md b/Using-OpenWebRX-with-a-real-input-signal.md deleted file mode 100644 index 9c9d0b3..0000000 --- a/Using-OpenWebRX-with-a-real-input-signal.md +++ /dev/null @@ -1,13 +0,0 @@ -A workaround for this is to convert the real signal into a complex signal, as the DDC routines currently only work for complex input signals. This is no problem as most SDR devices are based on quadrature downconversion. - -In this example, we are using an audio card as a VLF SDR: - -``` -center_freq = 192000 / 2 -samp_rate = 192000 / 4 -start_rtl_command = "arecord -f S16_LE -r 192000 -c1 - | csdr through | csdr convert_s16_f | csdr shift_addition_cc -0.25 | csdr fir_decimate_cc 2 0.005" -format_conversion = "" -``` - - - diff --git a/Using-OpenWebRX-with-the-audio-card-as-a-VLF-receiver.md b/Using-OpenWebRX-with-the-audio-card-as-a-VLF-receiver.md new file mode 100644 index 0000000..236344e --- /dev/null +++ b/Using-OpenWebRX-with-the-audio-card-as-a-VLF-receiver.md @@ -0,0 +1,12 @@ +> We have to convert the real signal into a complex signal, as the DDC routines currently only work for complex input signals. + + +``` +center_freq = 192000 / 2 +samp_rate = 192000 / 4 +start_rtl_command = "arecord -f S16_LE -r 192000 -c1 - | csdr through | csdr convert_s16_f | csdr shift_addition_cc -0.25 | csdr fir_decimate_cc 2 0.005" +format_conversion = "" +``` + + +