|Published (Last):||24 December 2019|
|PDF File Size:||4.71 Mb|
|ePub File Size:||17.70 Mb|
|Price:||Free* [*Free Regsitration Required]|
Key layout considerations are listed below. More details relating to these may be found throughout the remainder of the hardware guide. The RF track from the antenna connector to the tuner input should be kept as short as possible.
This track should be designed as a 50 or 75R impedance line to match the antenna. This track must run above a solid ground plane. The RF signal ground return path should be as low inductance as possible. E pins 4, 6, 7 should connect to a solid ground plane that runs below the RF track. If there are multiple planes on different layers, these should be tied together using ground stitching vias particularly around the RF tracks and RF connector. In some applications such as a mobile phone there may be strong blocking signals present.
The user may wish to add a filter before the tuner to eliminate the effect of these. These isolate tuner VDD domains from the sensitive analogue domains preventing noise degrading sensitivity performance. It is recommended that the Tuner Analogue Ground and LNA domains have an additional nF capacitor which will also filter lower frequency noise.
Decoupling capacitors should be placed on the tuner side of any inductors. Do not route E 1V5 supply directly above the clock track and vias. This minimises coupling between the supply and reference clock in order to prevent pickup on the supply line of clock tones. In some applications, it may be possible for the E tuner to share a clock with the demodulator.
In this case, additional care must be taken with the routing of the clock track. Any noise that is coupled to the clock will pass to the tuners local oscillator and will degrade performance. The clock track is one of the most sensitive nets on the PCB. Any noise that gets onto this line will be amplified in the tuner and will make the local oscillator signal inside the tuner noisy thus degrading sensitivity. Track should be routed so that it is shielded from any noisy signals. The E may be used in a system that will power down the tuner when it is not used e.
It is recommended that the tuner is shut down by the dedicated hardware input, NOT by disabling the 1V5 regulator to the tuner. This eliminates the possibility of phantom powering effects which may damage the tuner. The USB lines should be routed as a 90 Ohm differential impedance pair. These should be routed above a solid ground plane providing the return current path. Grounds should contain stitching vias around the USB tracks and connector.
USB tracks should have constant width and separation. Tracks should be routed as differential lines with the same track width and track separation so that 90 Ohm differential impedance is maintained. It is recommended that a common mode filter is placed in the USB tracks to prevent this noise coupling onto the dongle.
This filter should be placed at the USB connector end of the lines. The USB electrical ground pin must be connected to the dongle ground plane. It is recommended that chassis ground is not connected on the dongle as noise may be coupled to the USB dongle. The MPEG data lines are high speed digital lines. The series termination resistors combined with the capacitance of the connected IC input will provide an RC filter that will slow edges removing very high frequency harmonics and prevent these from coupling to the tuner and acting as noise.
Care must be taken to ensure that HDMI noise MHz or harmonics of this do not couple to the tuner via supply or ground domains. It is recommended that the HDMI chip is physically separated from the tuner. If a mobile phone or other RF device is used near the antenna of the E such as with an indoor aerial, it may pickup spurious GSM or other RF interferers affecting device performance.
In such circumstances, it may be appropriate to use a filter that will pass all the UHF frequencies whilst attenuating GSM phone signals. Please contact Elonics for design suggestions.
Nooelec NESDR XTR Tiny SDR & DVB-T USB Stick (RTL2832U + E4000) w/ Antenna and Remote Control
Mijas As with other SDRs, the exact frequency range capability varies somewhat from unit to unit. Wireless engineers, students, and hobbyists can learn to receive and decode real-world radio signals using this low cost RTL-SDR hardware connected to your computer. For my purposes, the RT has met my needs. Write Your Own Review Only registered users can write reviews.
Clé Nooelec avec tuner E4000 65-2300Mhz (TCXO option)
You can refer to the seperate spiral antenna elonids for construction and technical details. C that exposes a function, resetusb. The rtlsdr RTLU chips use a phased locked loop based synthesizer elonjcs produce the local oscillator required by the quadrature mixer. I think especially ZVEI is quite spammy. This means you need Inline:: To send the same command of stepping 1 position counter-clockwise to the other motor.
Elonics E4000 - Low Power CMOS Multi-Band Tunner - Hardware Design Guide
Please, log in or register. Unfortunately, even the congruent listings proved to be a disappointment. Orders usually shipped in 1 business day! This entry was posted in ComputingElectronicsRadio and tagged rtlsdr. Outperforms many devices 10x its cost!
E4000 ELONICS PDF
There are plenty of adapter and adapter cables available in our store if you want to connect your favorite antenna! For my purposes, the RT has met my needs. Click for more about me! Please, log in or register. However, we strongly recommend you take a look at the Ham It Up, which will let you listen all the way down to kHz or lower with impeccable sensitivity. Orders usually shipped in 1 business day!