Item Tag: Markenlos

Description:WHAT IS SOFTWARE DEFINED RADIO (SDR)?In traditional hardware radios, the mathematical operations required to decode and process radio signals are performed using analogue circuitry. Recently, computers have become powerful enough to perform the required mathematical calculations in software, hence the term software defined radio. This has led to advanced radios that previously required complicated analogue hardware now being able to be implemented easily in software. This has reduced the cost of advanced radio capabilities such as wideband tuning and waterfall displays.WHAT IS THE RTL-SDR?The RTL-SDR is an extremely cheap software defined radio which is based on DVB-T TV (Digital HD TV) USB receiver dongles that have the RTL2832U chip in them. It was discovered by hardware hacker Eric Fry, Linux driver developer Antti Palosaari and the Osmocom team who were developing their own SDR that the RTL2832U chip had a mode which enabled SDR. Today, by using custom software drivers, a commonly used cheap RTL2832U can then be turned into a sophisticated SDR with features that would have until recently cost in the hundreds to thousands of dollars. Of course, the performance of these dongles will not match a dedicated SDR, but they perform extremely well for the price, and almost all hobbyist projects that can be done with expensive radios or SDRs can also be done with the rtl-sdr. A wideband SDR opens up many interesting possible projects and avenues to explore. Some applications of the RTL-SDR include the following, some of which will be discussed in more depth in the project tutorials chapter.Functions:Listening to unencrypted Police/Ambulance/Fire/EMS conversations.Listening to aircraft traffic control conversations.Tracking aircraft positions like a radar with ADS-B decoding.Decoding aircraft ACARS short messages.Scanning trunking radio conversations.Decoding unencrypted digital voice transmissions.Tracking maritime boat positions like a radar with AIS decoding.Decoding POCSAG/FLEX pager traffic.Scanning for cordless phones and baby monitors.Tracking and receiving meteorological agency launched weather balloon data.Tracking your own self launched high altitude balloon for payload recovery.Receiving wireless temperature sensors and wireless power meter sensors.Listening to VHF amateur radio.Decoding ham radio APRS packets.Watching analogue broadcast TV.Sniffing GSM signals.Using rtl-sdr on your Android device as a portable radio scanner.Receiving GPS signals and decoding them.Using rtl-sdr as a spectrum analyzer.Receiving NOAA weather satellite images.Listening to satellites and the ISS.Listening to unencrypted military communications.Radio astronomy.Monitoring meteor scatter.Listening to FM radio, and decoding RDS information.Listening to DAB broadcast radio.Use rtl-sdr as a panadapter for your traditional hardware radio.Decoding taxi mobile data terminal signals.Use rtl-sdr as a true random number generator.Listening to amateur radio hams on SSB with LSB/USB modulation.Decoding digital amateur radio ham communications such as CW/PSK/RTTY/SSTV.Receiving HF weatherfax.Receiving digital radio monodiale shortwave radio (DRM).Listening to international shortwave radio.Looking for RADAR signals like over the horizon (OTH) radar, and HAARP signals.Data download:http://rtlsdr.org/softwarewindowshttp://www.qsl.net/py4zbz/hfrtl.htmhttp://v.youku.com/v_show/id_XNjgwODY3OTYw.htmlhttp://www.radioamatoripeligni.it/i6ibe/rtl2832hf/dongle.htmhttp://www.rtl-sdr.com/big-list-rtl-sdr-supported-software/Package Content:1 x 100KHz-1.7GHz full band UV HF RTL-SDR USB Tuner Receiver/ R820T+8232 Ham Radio1 x USB cable1 x antenna Contact usReturn PolicyFeedbackContact us For anything problem about product, price, shipping or order status, pleasecontact us via eBay message.Just contact us using the "Ask the seller a question" link on eBay. We expect positive feedback and 5 scores DSR from you. Return Policy We believe our items are so outstanding. We are convinced you will be happy with your Purchase. If you do not satisfy with our items. Please simply return to us within 30 Days in original condition. Just pay for the returned postage. Then we can issue full refund to you after the returned item arrived at our warehouse. Please include your eBay ID and item number with any email requests. Feedback * When you satisfied with our product and services please leave us positive feedback. * If you have got the package, please confirm "Delivery on time" For us. * If a problem occurs, contact us immediately with any email request. * Just contact us using the " Ask the seller a question" link on eBay. Your Satisfaction is our Priority. Our goal is to make all our customers as happy as possible while shopping with us.

SG3525 PWM Controller Module Adjustable Frequency 100HZ-100KHZ NEWProduct Image: Product Description: Specification: 1, onboard SG3525A PWM control chip 2, on-board 78M05 regulator chip, providing a reliable reference voltage 3, onboard two precision adjustable resistors, R3 controls the duty cycle, R4 control frequency 4, on-board power indicator 5, the working voltage: 8 ~ 12V 6. Frequency Range 100HZ-100KHZ adjustable 7. Duty Cycle :0 - 100% adjustable 8.voltage : 5v 9, board size: 30.8 (mm) x18 (mm) Shipping Included: 1PCS*SG3525 PWM Controller Module Adjustable Frequency 100HZ-100KHZFeedbackWarrantyShipmentFeedbackWe appreciate your feedback very much. As it will motivate us do better. If you have any questions with our goods or service, Please kindly contact us firstly before leaving negative feedback. Thank you in advance Warranty1. All merchandise will be carefully test before shipping. We will try our best to avoid any quality problem. 2. We promise warranty for quality in one year and we will repair it free of charge. The returning shipping should be paid by customer. 3. If you are not satisfied with the product, Please contact us. We'll provide you a satisfying solution.Shipment1.Normmly we will send the goods within 1-3 working days after your payment is verified . 2.Please check if the goods are in good condition and sign before the delivery man leaves.If you find the product is lost or damaged on the way. Please take photo and let the delivery men confirm it. Then we will help you let the shipping company compensate you.