Full Rtl2832u+r820t2 Receivers Shortwave Special Receiver Aerial Band 100khz-1.7ghz Tv Tuner Rtl.sdr Great Linus Ila Rating: 4.9 out of 5
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Note:
1.Due to the difference between different monitors,there are color differences,pls understand.
2.Please allow 1-3mm errors due to manual measurement.
3.This product can only receive FM radio and the nearby radio signal, can not receive shortwave. If you want to receive shortwave, you can buy matching antenna.
The receiver is now using the latest RTL2832U + R820T2 program, the use of RTL2832U on the Q channel, increasing the frequency of 100KHz-24MHz direct access. To achieve a full reception of 100KHz-1.7GHz.[R820T2 tuner has a slightly better sensitivity than the R820T, lower noise floor, higher signal to noise ratio. Can work more stably around the frequency of 1.5 GHz. ToCan be connected to the computer, Andrews and other devices using SDR software to receive 100KHz-1.7GHz electromagnetic waves to support AM, FM (NFM, WFM), CW, DSB, LSB, USB demodulation. Can listen to shortwave single sideband communication, FM radio, walkie-talkie calls, aviation bands and so on.[Through software can crack analog yin, digital tone. To[You can set the automatic search scan. To[Can break the digital radio through the software ID and demodulate the voice signal]
Archive video, we look at
Http://v.youku.com/v_show/id_XNjEwODYzNzM2.html
Receive amateur radio. Use a shortened inverted V antenna.
Http://v.youku.com/v_show/id_XNjI2OTc5MDQw.html
Receive AM radio station. Use a shortened inverted V antenna.
SETTING UP AND USING YOUR RTL-SDR
SDR# SETUP GUIDE (TESTED ON WINDOWS VISTA/7 + XP)
1. SDRSharp is the easiest and most commonly used software defined radio software receiver for the RTL-SDR. Go to www.sdrsharp.com and head to the download page. Note that you must have the Microsoft .NET redistributable installed to use SDRSharp. Modern Windows PCs have this installed by default, but older PCs running XP may need this to be installed. It can be downloaded from http://www.microsoft.com/en-gb/download/details.aspx?id=21.
2.Ignore the downloads on the top of the page. Scroll down to where it says “Important note for RTL-SDR users”. Download sdr_install.zip from that link. NOTE: At the time of writing this book the SDR# downloads page has recently changed. The sdr_install.zip file download is currently available from the main page at sdrsharp.com but it’s location may change in the future.
Extract the sdr-install folder from the zip file to a place on your computer.
Double click on install.bat from within the extracted folder. This will start a command
prompt that will download SDRSharp and all the files required to make SDRSharp work with RTL-SDR. Everything will be placed into a new folder within the sdr-install folder called “sdrsharp”. The command prompt will automatically close when it is done.
Plug in your dongle and do not install any of the software that it came with, but ensure you let plug and play finish trying to install it. If necessary, uninstall any DVB-T software drivers you’ve installed from the CD that some dongles come with.
Open the newly created sdrsharp folder. Find the file zadig.exe. Right click this file and select “Run as administrator” if using Windows Vista/7. If you are using Windows XP, download the XP version from http://zadig.akeo.ie/. If you are on Windows 8 you may get unsigned driver issues when using zadig. To get around this use the newer version (v2.1+) of zadig from http://zadig.akeo.ie/.
In Zadig, go to Options -> List All Devices and make sure this option is checked
8. Select “Bulk-In, Interface (Interface 0)” from the drop down list. Ensure that WinUSB is selected in the box next to where it says Target. (Note on some PCs you may see something like RTL2832UHIDIR instead of the bulk in interface. This is also a valid selection).
9. Click Install Driver. You might get a warning that the publisher cannot be verified, but just accept it by clicking on Install this driver software anyway. This will install the drivers necessary to run the dongle as a software defined radio. Note that you may need to run zadig.exe again if you move the dongle to another USB port, or want to use two or more dongles together.
10. Open SDRSharp.exe. Set the drop down box at the top next to the Play button
to ‘RTLSDR / USB’. Press Play. Your rtl-sdr software radio should now be playing some static and showing an RF spectrum and waterfall! If everything has worked you should be able to start tuning to frequencies using the numbers at the top of the program.
11. Click on the Configure button to bring up the configure menu.
12. By default the RTL-SDR’s gain is set to zero. Increase this gain by moving the RF Gain slider up, or by turning on Tuner AGC.
13. Receiving LF/MF/HF (0 - 30 MHz)
The antenna must be connected to the HF input port
The program of SDR # with RTL configured to direct sampling of the signal Q, as shown in the following figure:
signal receiving HF band needs to meet the HF Antennas such as Long Wire, Random Wire, Dipole etc.. To have a good effect need matching antenna.
Windows 8 can cause signed driver issues with zadig. Some users report getting the error: “System policy has been modified to reject unsigned drivers”. To solve this download the newer Zadig 2.1+ drivers from http://zadig.akeo.ie/.
RECEPTION IN SDR# SEEMS VERY POOR/RECEIVER IS INSENSITIVE
Make sure you have increased the gain slider which can be accessed by clicking on the configure button. Also, in poor reception areas using the stock antenna indoors may not be sufficient. Though rare, another cause of insensitivity is a dongle blown by electrostatic discharge.
SDR# GIVES ERROR “APPLICATION FAILED TO INITIALIZE PROPERLY
(0XC0000135). CLICK OK TO TERMINATE.”
This might mean that you do not have the .NET 3.5 Framework installed. Download it
from http://www.microsoft.com/en-gb/download/details.aspx?id=21.
SDR# GIVES ERROR “CANNOT ACCESS RTL DEVICE”
You may have tuned to a frequency that it out of range of the RTL-SDR. Tune back to a known supported frequency like 000.100.000.000 and press play.
WHAT IS BULK IN INTERFACE-1?
This is the IR interface for the remote control which is not required for SDR.
ZADIG WON’T RUN
Some users report that Zadig crashes upon opening. An alternative driver installer can be found at http://visualgdb.com/UsbDriverTool/. Use this tool to install the libUSB - WinUSB drivers. SDR SHARP USERS GUIDE
SDR# is currently the most popular SDR program used with the RTL-SDR. It is easy to setup and simple to use. To install SDR#, go through the RTL-SDR setup guide first.
Upon starting SDR#, we suggest you reduce the Range setting and increase the FFT resolution to 16384. See below for more information.
Open SDR#. You will be greeted with this screen shown below. Here we have highlighted the main parts of SDR#.
MAIN SETTINGS
PLAY BUTTON
This button is used to start and stop the SDR.
INPUT DEVICE SELECTION
This is a drop down menu which is used to select the SDR input device being used. If you are using an RTL-SDR, select RTL-SDR/USB. Be sure to NOT select RTL-SDR/TCP unless you are using a remote server with rtl_tcp.
CONFIGURE MENU
Clicking this button opens up the configure menu. In here you can change settings like the sample rate (bandwidth) and RF gain.
FREQUENCY INPUT
Use the mouse to set the desired frequency in MHz you wish to listen to here. You can either click on the tops and bottoms of each individual number to increase or decrease the value, or simply hover over the number you want to change and use the mouse wheel to alter the value.
MODE SELECTION
Here you can choose what type of demodulation mode the signal at your currently tuned frequency uses.
NFM -Narrowband Frequency Modulation. Common mode used by walkie talkie radios and digital signals.
WFM -Wide Band Frequency Modulation. Is the mode that broadcast FM stations use (eg the radio you listen to in your car).
AM -Amplitude Modulation. Used by broadcast AM stations that are receivable by normal radios and air band voice frequencies used by aircraft and air traffic control.
LSB/USB -Lower Side Band/Upper Sideband. Use in the HF band by ham radio to transmit voice efficiently.
CW -Continuous Wave. Used for listening to Morse Code.
DSB -Double Side Band. Not commonly used.
RAW -Raw signal. Almost never used.
VOLUME / AF GAIN
Set the volume level of your output speakers or audio piping device here.
RF FFT SPECTRUM
This part of the window shows the RF FFT spectrum as a graph in real time visually. Active signals will appear as peaks on this graph.
RF FFT WATERFALL
This part of the window shows the RF spectrum graph spread over time with new data at the top, and old data at the bottom, just like a waterfall.
TUNING BAR
The vertical red line shows where on the RF spectrum the RTL-SDR is currently tuned to. The tuning can be altered by simply using the mouse to click and drag the red line.
The shaded rectangular area around the red line shows the bandwidth of the tuned area. (don’t confuse this with the bandwidth/sample rate set in the configure menu). The bandwidth should be set so that it covers the area of the signal that is tuned. The bandwidth can be adjusted by using the mouse by simply dragging the edges of the shaded area in or out.
OTHER SETTINGS
Other options which you may find useful are described below.
RADIO TAB
OFFSET
This box offsets the tuned frequency by the amount entered. This is useful if you are using an upconverter. For example if you have an upconverter with a 100 MHz oscillator, you would set the offset to be -100,000,000 (don’t forget the minus sign). Without the offset, to tune to a signal at 9 MHz you would need to actually tune to 100 + 9 = 109 MHz. With the offset set, you can tune to 9 MHz as normal. If you have an upconverter with a 125 MHz oscillator you would tune to 125 + 9 = 134 MHz, or set the offset to -125,000,000.
FILTER BANDWIDTH
This is the width of the shaded part of the tunable area. You can set it manually here, or by dragging with the mouse as described above.
FILTER TYPE
Changes the filter type used. Different filters have different shapes. The filter is used to select the highlighted signal in the RF window. A good filter will select only the selected signal. Blackman-Harris is usually the best filter to choose.
FILTER ORDER
You may notice that with low filter orders signals outside of the tuned bandwidth can still be heard. Larger filter orders “tighten” or “sharpen” the band pass filter used in the tuned bandwidth preventing signals outside of the tuned bandwidth from being heard.
You will want to increase the filter order when there are strong signals near to your tuned area. SQUELCH
Mutes the audio when the signal level is below the specified value. Useful for when listening to speech as the static when no one is talking will be muted.
CW SHIFT
Mainly useful for when transmitting CW as it specifies the offset between CW transmit and receive frequencies.
SNAP TO GRID
In many bands signals are spaced a fixed distance apart. For instance in most countries air band signals are spaced 25 kHz apart (or 8.33 kHz in some countries). This setting can help with tuning by snapping directly to a signal. However, to use this with the RTL-SDR the PPM frequency offset correction must be set correctly, otherwise the frequencies may not line up.
CORRECT IQ
Should usually be selected as ON. This setting uses an algorithm to remove unwanted images (ghosts of strong signals) from showing up in the spectrum.
SWAP I & Q
If you are using SDR# as a panadapter, some hardware radios may have the I & Q signals swapped.
FM STEREO
Will enable stereo output for broadcast radio WFM signals.
MARK PEAKS
Simply marks any peak in the RF spectrum with a circle.
AUDIO TAB
OUTPUT
Sets the audio output device. By default it is set to your speakers. If you are passing the audio to a decoder program here you would choose your virtual audio cable to send the audio to.
AGC (AUTOMATIC GAIN CONTROL):
The AGC tab will only be activated in the AM, DSB, LSB, USB and CW demodulation modes.
USE AGC
Turns on the automatic gain control. The AGC will attempt control the volume level so that loud sounds are not too loud and quiet sounds are not too quiet. The default settings work well for audio signals.
FFT DISPLAY
VIEW
THE BIG LIST OF RTL-SDR SUPPORTED SOFTWARE
http://www.rtl-sdr.com/big-list-rtl-sdr-supported-software/
Antenna Long Wire con Balun 9:1
http://www.radioamatoripeligni.it/i6ibe/balun9a1/balun9a1.htm
Alternative Installation Procedure for RTL.SDR and HDSDR
http://www.hamradioscience.com/alternative-installation-procedure-for-rtl-sticks-and-hdsdr/
Package includes: 1 x Built-in up-converter 100KHz-1.7GHz wideband SDR receiver
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