20mhz oscilloscope

Help coal mine customers adjusted for many years terminal resistance, summed up some of the experience for everyone to reference, no reference theory, but are the result of practice. About the terminal resistor: We always remember can terminal to add 120 euro, but that is a short distance impedance matching results, if in the long-distance or add 120 kohm will be very harmful to the signal, because the can transceiver drive capacity is certain, transmitted 5 km, back to the route impedance (can

Recently, there is a product used to the module, because there is no technical support, directly on the machine debugging, test results for the band barrier launch distance of 60 meters. Here are a few knowledge points to apply: 1: The programming operation, actually relatively simple, the modulation signal 315M is the module comes with, does not need the modulation and the demodulation, we only need to control own agreement, I use is the Infrared emission Protocol to control. 2: The transmit bi

(n_dl_rb=25), only one gap value can be selected, the corresponding frequency offset value n_gap1 are: 1.4MHz n_gap1= 3, 3MHz n_ gap1=8, 5MHz n_ gap1=. The gap=12 in Figure 1 above conforms to the protocol for 5MHz bandwidth (n_dl_rb=25).For the larger bandwidth of 10MHz (N_DL_RB=50), 15MHz (n_dl_rb=75), 20MHz (n_dl_rb=100), the protocol specifies two different gap values, whichever is selected, which is notified to the UE by the DCI. For distribute

generated by a low dropout voltage regulator (LDO)that is specifically powered by the CPU 's digital logic, with a total of 1.4V(0-12mhz), 1.6V(0-16mhz), 1.8V(0-20mhz) and 1.9V(0-25mhz) four levels. The minimum allowable voltage of the VCORE is dependent on the MCLK size chosen, which means that the high frequency requires a higher VCORE.Management will generate a reset (mainly during power-up), and the monitoring will generate interrupts (monitoring

device. The typical decoupling capacitance value in a digital circuit is 0.1μf. The typical value of this capacitance's distribution inductance is 5μh. 0.1μf decoupling capacitor has a 5μh distributed inductance, its parallel resonance frequency around 7MHz, that is, for 10MHz or less noise has a good decoupling effect, more than 40MHz of noise almost does not work. 1μF, 10μf capacitance, parallel resonance frequency above 20MHz, the effect of removi

and data to a document; (Signal recording)-T fromfile. Extracting and sending RF signals from files; (signal playback)-W # Receive data into file with WAV header and automatic name. # This is forsdr# compatibility and May is not work with other software. [-F Freq_hz] # FrequencyinchHz [0MHz to 7250MHz]. [-I if_freq_hz] # intermediate Frequency (IF)inchHz [2150MHz to 2750MHz]. [-O lo_freq_hz] # front-end Local oscillator (LO) frequencyinchHz [84MHz to 5400MHz]. [-M Image_reject] # image reject

only be used at the same time 3 non-overlapping channels;Figure 2.4GHz Band2, 5.8GHz Band Division1) using the operating frequency range of 5725-5850 MHz;2) The available bandwidth is 125MHz, divided into 5 channels, each channel bandwidth is 20MHz;3) The adjacent channels do not overlap;Figure 5.8GHz BandAppendix(a), WLAN standard family IEEE 802.11 Specification for physical layer and media access layer IEEE 802.11j

released for the b210/b200[6]-estimated retail price, cheaper though KickstarterRF PerformanceThe RF range of the HACKRF and USRP B210 is wide. HACKRF is 20MHz lower than b200/210, and the highest carrier frequency can reach 6GHz. B210/200 is mainly based on AD9361 chip. This chip is actually working in 70mhz~6ghz, so it looks b210/200 slightly out of use, down to 50MHz. HACKRF uses a different type of RF chip to support wide bands. If you look at it

One, the European non-shielded cable Classification Main purpose Transmission frequency Transfer rate Application Class 1 pair stranded wire / Transmit voice / / / 2 / Voice transport Data transfer 1MHz highest 4mbit/s data transfer 4mbit/s for Token transport protocol 3 4 pair 24AWCG unshielded twisted pair cable 25 Yes 2

This paper introduces the basic method of pulse synchronization used in the project, its basic function is to remove a single clock width pulse from a clock domain, and then establish another pulse in the new clock domain, but in practical application, it is often not only pulse signal, data bus, Both the address bus and the control bus may be transmitted across domains. The handshake protocol, RAM, and FIFO are the most basic methods, but these methods are not necessarily the best approach if F

From the past few weeks, the first batch of 802.11AC wireless products have started to be listed. In essence, 802.11AC is the current smartphone and notebook computer mainstream 802.11n standard enhanced version, simply from the download speed can have a significant increase, or even to the original 802.11n several times the speed. The working principle of 802.11AC 802.11AC core technology is mainly based on 802.11a, continue to work in the 5.0GHz band to ensure backward compatibil

With the mobile phone mobile internet constantly, has basically completed the traditional 2G to 3G transition, at present, China is vigorously promoting the development of 4G, the recent more promising to release 4G Fdd-lte photos, mobile networks such innovations to the user is faster mobile phone mobile device access to the Internet speed, and more stable signal , which also produced a term for LTE. The LTE network has become popular in all major media in the network. What does the LTE network

16-bit pointer. intel®286 Processor (1982) The Intel286 processor introduced "protection mode" to IA-32. Protected mode uses the contents of the segment register as a selector or pointer pointer to a descriptor (descriptor) table. Descriptor provides a 24-bit base address, which increases physical memory addressing to 16M bytes (16m=2^24) and supports virtual memory management based on segment switching, as well as some of the column protection mechanisms. These mechanisms include: Segment boun

full grid in the area where the original Wi-Fi signal is only two bars in the room. In either direction, the REC10 extends the entire network's coverage to 10 feet (3.05 meters). Although this distance is not surprising, but with the help of this extender, the author's home in the original signal corner has indeed been completely eliminated. When judging the speed change, the author turns to the test room fixed position, the original Wi-Fi wireless signal and the different performance of the E

points of the sub-carrier overlay becomes SC-FDMA symbol, because the modulation is done in the time domain, so the uplink of a UE data can be regarded as a single carrier,So called SC-FDMA. A SC-FDMA symbol corresponds to the 12*NRB sub-carrier, and a time slot consists of 7 SC-FDMA symbols.4. For example, this re, which is assumed to be re (2,3), represents the third Sc-fmda symbolic symbol of the 2nd sub-carrier on the time domain. What this symbol is. is a waveform of physical space transfe

products based on 20Mhz frequency resources. This test product improves frequency utilization from several aspects of frequency domain, time domain and modulation: * A product based on this technology divides a wide bandwidth resource into several sub carriers, users choose to use a good wireless carrier, when the multi-user access, the location of different terminals wireless transmission characteristics vary greatly, each terminal can complement t

mobile devices to 2.4GHz networks. Enable the 5GHz network for your laptop and desktop computers. 9. Limit the frequency band of your router Sometimes you can't choose 5GHz bands or choose a "not congested" channel, in which case you can limit your router to sending signals at 20MHz intervals, although this may reduce overall throughput, but it will give you a stronger signal. 10. Test Connection condition There are many wireless monitoring tools

routers are 54M, but starting from 802.11n, the wireless router appears 150M, 300M, 450M or even 600M multiple speeds, and the router's nominal 750M and gigabit. After the advent of the AC router, the speed of the wireless router is even more chaotic, even the brand router hit 1900M speed. In China, it's not surprising that manufacturers are bragging. Each family in the propaganda, generally put 5G and 2.4G speed, so ac433+n300 is said to be 750m,ac867+n300 into 1200M (or 1167M), this looks li

============ Problem Description ============Android Development Board in hand, mic recording Go is i2sI'm using the audio recording software provided by Android itself soundrecoder.apkWhen recording, the small pointer that detects the sound seldom shakes, when my voice is high, I can record it, the sound is smooth, and then a high or can record!The sound is intermittent, and it's very nasty!I use the USB interface of the camera to record, (because the camera also with mic, just USB interface),

engineer! [3] Do not be a technical master, but a general quality master! When we are in a company, we often look down on someone and say, "I don't know anything. Why do we get so much money and why do we get promoted !" This is a common example of engineer pedantic. Is 8051 awesome? People must have his skills, and you cannot. Do you think the boss has been operating for so many years? People may be good at management, understanding the boss's intentions, and department coordination. Therefore