From 005b2bb079596254e2b412639fd4b18b39d07099 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Andr=C3=A1s=20Retzler?= Date: Sun, 8 Nov 2015 21:41:19 +0100 Subject: [PATCH] Update README.md --- README.md | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index 817f79d..842af98 100644 --- a/README.md +++ b/README.md @@ -63,7 +63,7 @@ Here is the good result if received with an RTL-SDR and GQRX: ### SSB modulator example for GNU Radio Use the flow graph in `gnuradio/ssb-rpitx`. -This will transmit an USB signal. +This will transmit an **USB** signal. ![SSB in GNU Radio](/images/grc-ssb.png?raw=true) @@ -75,6 +75,12 @@ After receiving it with RTL-SDR and GQRX: ![SSB in GQRX](/images/gqrx-ssb.png?raw=true) +If you want **LSB*, you should double-click the "Band Pass Filter" block, and change: +* *Low Cutoff Freq* to -3000 +* *High Cutoff Freq* to -300 + +![SSB in GQRX](/images/gqrx-ssb-bpf.png?raw=true) + ## Using rpitx with csdr to modulate streaming input csdr is a command line tool for simple DSP tasks. It can be used to build simple AM/FM/SSB receivers, and now transmitters as well, and is quite fast to setup.