|author||Andreas Eversberg <firstname.lastname@example.org>||2018-08-26 08:47:56 +0200|
|committer||Andreas Eversberg <email@example.com>||2018-08-26 08:47:56 +0200|
C-Netz: Allow SDR using C-Netz without calibration options
Crystals on SDRs are accurate enough for C-Netz (< 1ppm).
Diffstat (limited to 'docs')
1 files changed, 3 insertions, 1 deletions
diff --git a/docs/c-netz.html b/docs/c-netz.html
index 5f965eb..4a7bef2 100644
@@ -227,13 +227,15 @@ We need to calibrate the speed of our transmit signal (and receive signal as wel
<font color="red">Importaint: We need calibrate the signal processing clock!</font>
+You can skip this parts, if you use SDR, because they have more accurate crystals than sound cards.
First of all we need a reference clock.
Since most computers have standard crystal clocks, we cannot use our system clock without any help.
I decided to use the help of the NTP daemon.
-After running my system for several days (5 days), the clock speed was accurate enough for a base station.
+After running my system for one up to 5 days, the clock speed was accurate enough for a base station.
Be sure to choose a place for your PC with constant temperature.
A room inside a building is sufficient.