diff --git a/docs/sdr.html b/docs/sdr.html index 6ee5319..733a20e 100644 --- a/docs/sdr.html +++ b/docs/sdr.html @@ -79,17 +79,12 @@ In case of B-Netz, I use the following parameters: --sdr-rx-gain 30 \ --sdr-tx-gain 30 \ --sdr-samplerate 5000000 \ + --sdr-bandwidth 15000000 \ -s 100000 \ -k 17 -
-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. -
-In order to change from analog sound card to SDR, you need --sdr-soapy option. In my setup I use antennas directly connected to the SDR. @@ -103,6 +98,30 @@ Note that channel 19 is not given here, but will be used automatically. With B-Netz, the transmitter switches from any voice channel to the paging channel (19) whenever the phone gets paged.
++Alternatively you can have these options pre-set by just a single option: --limesdr +But still you can add any SDR option afterwards to set or modify them. +
+ ++ +# bnetz --limesdr -k 17 + ++ +
+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. +
+ ++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. +By creating two channels ('-k 15 -k 17') or an even number would eliminate the problem. +The center frequency is between the channels now. +
+@@ -160,6 +179,12 @@ The software will notice you, if the channels wont fit into the spectrum. In this case increase the sample rate (-s) to generate a wider spectrum. (--sdr-samplerate must not need to be changed)
++If multiple channels are defined, the channel type for the first channel is automatically set to the control channel, +the other channels to voice channels. +You may still alter this by specifying channel type for each channel. +
+Note that the CPU usage increases for the main thread. I suggest to monitor the usage using "top -H". @@ -181,6 +206,7 @@ Because C-Netz uses only odd channel numbers for 10 KHz spacing, we use channel --sdr-rx-gain 30 \ --sdr-tx-gain 30 \ --sdr-samplerate 5000000 \ + --sdr-bandwidth 15000000 \ -s 100000 \ -k 131 -k 135 \ -C 0,0 @@ -203,6 +229,24 @@ Transmit PAL 'FUBK' test image on TV channel 21. +
+Example: Receive or transmit a radio broacast channel
+Receive radio station at 105.6 MHz with German stereo carrier (Pilot-Tone) and output it on sound card 0, device 0.
+If you replace --rx by --tx, you will transmit from sound card.
+
+ +# osmoradio --limesdr \ + -f 105600000 + -M fm + -s 500000 + -S + -a hw:0,0 + --rx + ++