I got my Spectrum Analyzer and here are the steps I use to install and configure it on my Linux (Ubuntu) laptop. Download the software here. http://www.dl4jal.eu/ link to the file http://www.dl4jal.eu/linnwt4_V4_11_10.tar.gz Copy the file to your favorite directory mkdir nwt cd nwt cp /home/anton/Downloads/linnwt4_V4_11_10.tar.gz ./ Unzip the file in the directory. unzip linnwt4_V4_11_10.tar.gz Check if the files has unziped There should be a directory linnwt4_V4_11_10 and cd to it. cd linnwt4_V4_11_10 Check if you have qmake installed qmake -v You need vertion QT 4 + if you don't have it, install it. sudo apt-get install build-essential now install QT sudo apt-get install gcc qt4-qmake libqt4-dev now create a directory build inside the linnwt4_V4_11_10 directory mkdir build Change to the build directory cd build run the gmake command qmake -qt4 ../ Then run the make command make Get coffee ;-) it takes 2 min There should the be a new file in exsiting directory called linnwt. Connect your spectrum analizer to your laptop USB connector. then run the apllication linnwt sudo ./linnwt mmmmm, its German! no problem, run it with this parameter to get it in Englesh sudo ./linnwt ../app_en.qm
USB device error could not find your NWT device.
So how do I identify my USB device and configure it in the software ?
Run the command tail -f /var/log/syslog
Then unplug your spectrum analyzer usb cable from laptop and reconnect it after 2 seconds to laptop.
There will be new text appearing in the terminal console. Something like this below.
Jun 26 11:55:07 anton-SATELLITE-P755 kernel: [51330.537093] usb 2-1.2: USB disconnect, device number 5 Jun 26 11:55:07 anton-SATELLITE-P755 kernel: [51330.537573] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0 Jun 26 11:55:07 anton-SATELLITE-P755 kernel: [51330.537628] ftdi_sio 2-1.2:1.0: device disconnected Jun 26 11:55:10 anton-SATELLITE-P755 bluetoothd[800]: Authentication attempt without agent Jun 26 11:55:10 anton-SATELLITE-P755 bluetoothd[800]: Access denied: org.bluez.Error.Rejected Jun 26 11:55:11 anton-SATELLITE-P755 kernel: [51334.756112] usb 2-1.2: new full-speed USB device number 6 using ehci-pci Jun 26 11:55:11 anton-SATELLITE-P755 kernel: [51334.855421] usb 2-1.2: New USB device found, idVendor=0403, idProduct=6001 Jun 26 11:55:11 anton-SATELLITE-P755 kernel: [51334.855430] usb 2-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Jun 26 11:55:11 anton-SATELLITE-P755 kernel: [51334.855434] usb 2-1.2: Product: FT232R USB UART Jun 26 11:55:11 anton-SATELLITE-P755 kernel: [51334.855437] usb 2-1.2: Manufacturer: FTDI Jun 26 11:55:11 anton-SATELLITE-P755 kernel: [51334.855440] usb 2-1.2: SerialNumber: AL01PTLP Jun 26 11:55:11 anton-SATELLITE-P755 kernel: [51334.858330] ftdi_sio 2-1.2:1.0: FTDI USB Serial Device converter detected Jun 26 11:55:11 anton-SATELLITE-P755 kernel: [51334.858406] usb 2-1.2: Detected FT232RL Jun 26 11:55:11 anton-SATELLITE-P755 kernel: [51334.859036] usb 2-1.2: FTDI USB Serial Device converter now attached to ttyUSB0 Jun 26 11:55:12 anton-SATELLITE-P755 mtp-probe: checking bus 2, device 6: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2" Jun 26 11:55:12 anton-SATELLITE-P755 mtp-probe: bus: 2, device: 6 was not an MTP device
You will be looking for ttyUSB?? in the text.
I my example, my usb was ttyUSB0
So now enter your ttyUSB?? in this usb port detail screen below. and then save your configeration.
Select the Settings > Options Menu from the pulldown menu in LinNWT4 application.
Change the value to /dev/ttyUSB?? Your port number found above.
In my case it was /dev/ttyUSB0
O.k., lets now setup a Frequency Spectrum scan.
Add frequency svan limits and then select a single or continuos scan option.
Connect your filter or circuit for testing on SMA terminals.
Then click on your Graphics display to see the return loss of you filter or circuit under test.
I think this Satellite will open up one of the most exiting telecommunication capabilities for Africa and Europe.(P4A/B) Es'hail-2 OS-100 Coverage map
Phase 4 AMSAT-DL planed
Qatar Satellite Company’s second satellite, Es’hailSat-2 (OS-100), will be placed in a geostationary orbit by a Space-X Falcon-9 rocket in November 2018. It will carry an AMSAT linear transponder as a secondary payload, giving Radio Amateurs access to a geostationary satellite for the first time.
Es’hailSat-2 will be “parked” 35 786 km above the equator at 25.5°East, nearly due North from Pretoria and Johannesburg (which are at 28°E).
Planned Frequency.
This satellite will have two linear transponders. (250 Khz and 8Mhz wide) Narrow band transponder: Up-links: 2400.050 - 2400.300 MHz modes SSB and CW. 5 Watt up link power, Down links: 10489.550 - 10489.800 center 10 489.675 MHz. Vertical polarization.
It will be so nice to have fixed antennas mounted on mast pointing to the satellite having continuous communication to any where in Africa and Europe. HI ;-) ;-)
Will have to start looking for some equipment and antennas for this one.
Linear transponder
2400.050 - 2400.300 MHz Up-link
10489.550 - 10489.800 MHz Down link
Wide band digital transponder
2401.500 - 2409.500 MHz Up-link
10491.000 - 10499.000 MHz Down link
My RTL dongle needs to listen on the following frequency
LO with 12V injection = lo - 10.489500Ghz + 1M to get center of bottom of the Spectrum on websdr
=9.75Ghz - 10.489500Ghz + 1Mhz = 7395Mhz (this is still debatable )
89 cm dishes in rainy areas at EOC like Brazil or Thailand.
60 cm around coverage peak,
75 cm dishes at peak -2dB.
Narrow Band : linear vertical polarization.
Wide Band: linear horizontal polarization.
S-Band 2.4 GHz Narrow Band-Uplink:
Narrow band modes like SSB, CW
5W nominal Uplink power (22.5 dBi antenna gain, 75cm dish)
RHCP polarization
S-Band 2.4 GHz Wide Band-Uplink (DATV):
Wide band modes, DVB-S2
Peak EIRP of 53 dBW (2.4m dish and 100W) required
RHCP polarization
Azimuth and Elevation details for Johannesburg South Africa. (For now the Elevation is 59.17 and Azimuth 350.43)
Azimuth and Elevation from Johannesburg
Setting up elevation the simple way.
Paper with a piece of string at back of Dish
Here is the Paper details
Gpredict tracking details.
Catalog number of Satellite is 43700
It seems that the satellite is still rotating around the equator
With the new TLE the Satellite has stabilized. at 59.17 Elevation and 350.43 Azimuth
Elevation is now 59.17 and Azimuth 350.43
2.4GHZ Transmitter.
The plan is to use my LimeSDR or hackrf for transmitter with low pass filter and a Power AMP. Details to follow
2.4Ghz Transmitter Diagram
Gnuradio Block diagram for Hackrf SSB
SSB Transmitter for Eshail2
Antenna setup
15db 2.4Ghz wifi Grid Antenna
I would recommend the 24db Grid or rather use 8 watt amp in 15db Grid.
Here is my presentation at the SARL on QO-100
My new transceiver setup.
1) Raspberry Pi 3B +
Hackrf.
MSI SDR dongle 10Mhz Bandwith 12bit. RX.
8W RF Amp.
40db Pre-Amp
My Eshail-2 QO-100 transceiver setup.
Software on Raspberry Pi
Connect remotely via Wifi
What can I do with the TP-Link TL-WR703N router? (APRS, SDR)
Basically
this device is meant to be a little 3g travel router. You can plug in a
3g USB adapter and share that Internet connection to multiple devices
over WIFI. It also supports Ethernet. It runs a Linux operating system
so this opens up lost of Amateur Radio opportunities. So for $24 you can
get a 400mhz Linux computer, with Ethernet, Wifi and USB ports and
several GPIO pins.
1) SDR Using a RTL-SDR dongle on TL-WR703n you can listing to Amateur radio frequencies. If you’re running OpenWrt Barrier Breaker (i.e. trunk) you can install librtlsdr SDR dongle labraries Here is the pre compiled applications https://steve-m.de/projects/rtl-sdr/openwrt/packages/
3) Create a start_dsdplus.bat in the directory where you unziped the DSDPlus1p074.zip zip file.
4) For now enter the following in the bat file DSDPlus.EXE -i1 -o2 -fr
5) Set the playback device as follows making the VB-Cable the default device and Speaker just ready.
6) Set the recording settings as follows.
7) In the Recording tab set the VB-Cable as default device and Stereo Mix ready
8) Set the sound levels as follows.
VB-Cable level about 10% and Speaker level.
9) Volume settings
Volume Settings.
10) Now run the start_dsdplus.bat file that you created in step 3 and check that the numbers correspond to the red in the pictures below.
i = Audio input to DSDPlus and o = Audio Output from DSDPlus
10.1) Input to DSPPlus must be from VB-Cable and not any other device (Stereo mixer in my case).
10.2) Output must go to Speakers in my case to 2.
10.3) Your Audio input and output configuration should be different to the one I have.
10.4) You will then need to change it in the start_dsdplus.bat file and then re run start_dsdplus.bat file. and refresh websdr website (CTRL F5)
Then re-tune websdr DMR frequency to 438.225Mhz FM
11) If your Audio Input and Output configuration is correct you will have to just set your audio levels coming from webSDR and going to speaker.
Select 70cm_dmr band and tune frequency to 438210.88 Fm
13) There is small burst of data with now sound wait for the long bursts of data witch is normally conversation. I think the small burst is just data and you will not hear anything.
(Sound level to DSDPlus input should not be to strong)
Audio Processor Displays range of audio signal contains 6 adjustable bandpass filters and customizable deemfazis filter.
IF Processor Displays range IF signal to the demodulator, an asymmetric bandpass filter and a custom tracking notch filter.
Base band Recorder Writes the entire IQ stream received from the tuner to a file, you can choose a folder to store the recordings, and there is a scheduler for recording time. Large buffer for recording flow with high sampling rate without any losses. It can be controlled from other plug-ins.
IF Recorder Writes a stream of IQ intermediate frequency to a file, you can choose a folder to store the recordings, and there is a scheduler for recording time. It can be controlled from other plug-ins.
Audio Recorder Writes the audio file. Ample opportunities to control the format of the output file (mono, stereo, bit rate, sample rate). Extensive records management (do not write in the absence of a signal, create new files when changing frequency, etc.). Customizable file and folder names.
Decoder CTCSS squelch It displays the CTCSS tone in the presence of the signal and provides the squelch responds to set the tone.
DCS Decoder Squelch Displays DCS codes in the presence of a signal and contains a squelch responsive to certain code or the presence of any code in the signal.
AUX VFO Adds additional radio channels to SDR #. You can add more than one radio channel.
DSD Interface The plug consists of three parts. The first - an additional audio output from the demodulator can be used to output the audio signal through a virtual audio cable to other programs (WXtoImage, DSD, etc.). The second - a graphical interface to configure and run a digital signal decoder DSDPlus. And the third - to automatically turn off the sound output SDR # when choosing a frequency with a digital signal.
Time Shift It creates a memory buffer of up to several minutes. You can listen to the signals that have been broadcast and a present in the buffer. "All that is visible on the waterfall can be heard."
Digital Audio Processor It contains audio bandpass filter squelch by the presence of an audio signal and a signal scrambler inversion spectrum.
DDE Tracker + Scheduler Plug-in to communicate with the satellite tracking programs (Orbitron, WXTrack, SatPC32). When / companion care in the reception area is executed a list of commands for the satellite specified in the scheduler. It can control other plug-ins and run external programs.
QPSK Demodulator Plug-in for QPSK demodulation signal from the Russian satellite Meteor-M2 in real time. The final signal may be recorded in a file or transmitted via TCP on special version LRPTDecoder for decoding in real time. It may interact with other plug-ins.
TV The plugin displays the received PAL / SECAM TV signal. For receivers with a bandwidth of more than 7 MHz at the same time you can listen to the sound via the main radio SDR #. For rtl-sdr receivers need the modified file rtl-sdr.dll.
Frequency Manager Modified standard frequencies Manager SDR #. Added scanner iterates through the selected frequency. Added Manage window manager and some other improvements.
Frequency Scanner Fast scanner. It scans the specified frequency range. Saves frequency are not in the manager and activity time at these frequencies. It can scan multiple bands with different grid spacing, modulation bandwidth of the signal. There are modes of scanning all frequencies in the range, or only frequencies which are in the frequency or vice versa manager only frequencies that are not in the manager.
MPX Output It displays the selected audio device MPX signal after WFM demodulator with sample rate conversion to 192 kHz for further processing in other programs (eg RDSSpy).
Avia band 8.33 calculator Corrects manual input frequency range of air according to the standard steps for 8.33 kHz.
IQ Correction This is analogous to the standard functions of SDR # IQ correction. For slower computers help save some CPU time. There is a separate mode for R820T tuners - removal of only a constant component correction IQ on these tuners are required.
Audio Waterfall This plug-in created by Kiriyama. Adds SDR # waterfall displays the spectrum of the audio signal.21) Frequency LockThe function of this plugin is very simple, it blocks the frequency change settings in SDR #. Written at the request of the user to avoid accidental change of frequency of administration.
Here is a short description of the steps I took to install the SDRSharp plugins.
Create a start_dsdplus.bat file using Notepad in the directory where you unzipped the DSDPlus1p074.zip zip file.
For now enter the following in the bat file with Notepad DSDPlus.EXE -i1 -o2 -fr
Set the playback device as follows making the VB-Cable the default device and Speaker just ready.
Set the recording settings as follows. (Set VB-Cable as default and StereoMixer as ready)
SET VB-Cable as default and Stereo Mixer as ready.
14) In the Recording tab set theVB-Cable as default device and Stereo Mixer ready.
15) Set the sound levels as follows.
set cable volume not to high
16) Now run the start_dsdplus.bat file that you created in step 3 and check that the numbers correspond to the red in the pictures below.
17) i = Audio input to DSDPlus and o = Audio Output from DSDPlus
18) Input to DSPPlus must be from VB-Cable and not any other device (Stereo mixer in my case).
19) Output must go to Speakersin my case to 2
20)Your Audio input and output configuration should be different to the one I have.
21) You will then need to change it in the start_dsdplus.bat file and then re run start_dsdplus.bat file.
22) If your Audio Input and Output configuration is correct you will have to just set your audio levels coming from SDRSharp and going to speaker.
Your sound card numbers will be different and you need to update the bat file
24. Now we need to configure the DSD plugin in sdrSharp by giving it the path to your DSDPlus.
enter the path to your DSDPlus.exe in the DSD path block shown below. Now change the Audio settings in SDRSharp dsd plugin to be the same as as we did in the batch file by changing the audio device number.
Change input and output audio device as we did in batch file.
26) Now select the VB-Cable option in the SDRSharp DSD plugin menu to point to the VB-Cable
27) Then tune to DMR frequency channel in your area with SDRsharp at the top frequency selection and start the DSD on the left menu. I then got this warning pop box hiddenbehind my SDRSharp. Just click Run and the DSD popups will appear.
If all went right the following Scope,log and channel activity popups will appear.
Final check that the correct VB-Cable is used for Audio input and speaker as output.
28) For best results, make sure that all your SDR# and VB-cable / VAC sample rates are set to 48kHz and that you have disabled “Filter Audio” in SDR#. Also, the audio volume of SDR# should not be set to high. 29)Here is a list of DMR frequencies in South Africa
