From 0a3e11d8a807e9956c7dba16ca7510cecd3b5c83 Mon Sep 17 00:00:00 2001 From: Andreas Eversberg Date: Tue, 5 Jun 2018 07:09:29 +0200 Subject: work on docs --- docs/install.html | 5 +++-- docs/sdr.html | 28 ++++++++++++++++++---------- docs/setup.html | 8 +++++--- 3 files changed, 26 insertions(+), 15 deletions(-) (limited to 'docs') diff --git a/docs/install.html b/docs/install.html index 3447f7e..43deb7d 100644 --- a/docs/install.html +++ b/docs/install.html @@ -15,17 +15,18 @@ Two sound interfaces are required to talk and listen trough the base station usi

-If you want to install from GIT repository, run 'autoreconf -if' inside GIT repository first: +As you got the source code from GIT repository, run 'autoreconf -if' inside GIT repository's directory first: 

 
+# cd osmocom-analog
 # autoreconf -if

-Unpack the archive and change to its directory. Then compile: +Then compile: 

diff --git a/docs/sdr.html b/docs/sdr.html
index 733a20e..4cc3c2f 100644
--- a/docs/sdr.html
+++ b/docs/sdr.html
@@ -109,12 +109,20 @@ But still you can add any SDR option afterwards to set or modify them.
+

+Importaint: Select your RX antenna input! +

+

Be sure to select the right RX antenna input. The frequencies we use require the low frequency filter network, so I suggest to connect your antenna to RX_1_L and select "--sdr-rx-antenna LNAL". Different versions of LimeSuite have different default antenna inputs, so be sure to set your RX antenna.

+

+Importaint: Always use two or more channels, to avoid one channel being at the center of the spectrum! +

+

My LimeSDR setup causes a bad RX signal, when the RX frequency of the channel (uplink) equals the center frequency of the RX spectrum. This center frequency is used as RX frequency, when only one channel is created for the base station. @@ -122,6 +130,16 @@ By creating two channels ('-k 15 -k 17') or an even number would eliminate the p The center frequency is between the channels now.

+
+ +

+Press 's' to get an ASCII art graph of received frequency spectrum. +The spectrum's bandwidth is defined by the sample rate (-s) and not by the SDR sample rate! +If you don't get nice peaks, but maybe several peaks, you might over-driven the input. +Note that the peak will spread by the frequency deviation, so the peak might look noisy on the top. +If the peak is quite low, check the input gain. +

+

@@ -135,16 +153,6 @@ If the dots are yellow, or red, the received signal may overdrive the ADC. Especially when the linear view shows a deformed circle (or even rectangle), reduce RX level.

-
- -

-Press 's' to get an ASCII art graph of received frequency spectrum. -The spectrum's bandwidth is defined by the sample rate (-s) and not by the SDR sample rate! -If you don't get nice peaks, but maybe several peaks, you might over-driven the input. -Note that the peak will spread by the frequency deviation, so the peak might look noisy on the top. -If the peak is quite low, check the input gain. -

-

UHD diff --git a/docs/setup.html b/docs/setup.html index cae6034..18e67d8 100644 --- a/docs/setup.html +++ b/docs/setup.html @@ -32,7 +32,7 @@ For NMT the transmitter must be able to transmit around 463 MHz.

-This image shows a two-band amateur radio receiver without limitations for the frequencies above: +This image shows a two-band amateur radio transceiver without limitations for the frequencies above:

@@ -51,8 +51,8 @@ I added an input to switch between two channels for the B-Netz.

Use radio receiver for 2-meter band to receive from A-Netz or B-Netz phones. Use radio receiver for 70-cm band to receive from C-Netz or NMT phones. -The transmitter cannot be re-used, because all networks are full duplex. -A separate radio is required to simultaneously transmit and receive. +A trasceiver cannot be re-used, because all networks are full duplex. +A separate receiver is required to simultaneously receive while the transmitter is transmitting. For A-Netz the receiver must be able to receive around 162 MHz and 157 MHz. For B-Netz the receiver must be able to receive around 153 MHz and 148 MHz. For C-Netz the receiver must be able to receive around 465 MHz and 455 MHz. @@ -105,8 +105,10 @@ The ATX-2 power supplies are regulated on the 12 Volts rail. I added two plugs and a switch. The switch connects to the PS-On line. In case of an over-current, the switch can be used to reset the protection circuit. + Note that opening a switching power supply can be dangerous and may cause death. If you don't have the knowledge about power supplies, ask an expert to help you. +

-- cgit v1.2.3