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342 Threads found on Reception
Hello, I'm not a specialized person in this field of wireless communications but i need to calculate the maximum distance 2RF systems can be apart. One of them will be placed in a eletric racing car. I know the motor produces noise so if there is anyone who can help with this part too it would be awesome. The motor is an EMRAX 228 medium volta
i'm using the 20Mhz crystal in PIC18f26k22 controller fro serial communication program. the aim of program is to receive data from the Hercules to PIC and send same data back to Hercules while using serial communication i try to receive serial data at baud rate of 19200. but as i use reception time out count value 866 (which is calculate bas
i have interfaced pic and ds1307, along with displaying it in lcd. but no communication is happening between pic and rtc, neither transmission or reception.please help. assembly codes is attached herewith
Can anyone send me the code for the dscdma rake receivers...... mail id thanks
Please, Can anyone send me the matlab code for DS CDMA rake receivers sandeeppokala1995@gmail.comm
The EM4094 is an integrated transceiver chip that can be used to build analog front-end modules for RFID readers. The chip's data transmission and reception links allow the transmission and decoding of any communication protocol, so the EM4094 supports all EM's 13.56MHz transceiver chips, ISO15693, ISO14443 A & B, and the Sony Felica protocol. With
can it be received by an android phone? No. Requiring direct reception by a mobile phone without a gateway restricts the protocol choice to Bluetooth. Battery lifetime would strongly suggest BLE with maximum range of 10 m, unfortunately.
am using a SAMSUNG wireless charger (Model: EP: PG9201) Transmitter for my project, and at the receiver end I have RX coil of 26uH inductance and 520 mOhm DC Resistance, when i place the reciver assembly on top of the transmitter the coil is picking up volta135159135158135157[A
Hi, I am attempting to transmit and receive using two ADF7242 boards. The datasheet of ADF7242 says that it has 256 bytes of dedicated RAM which constitute Tx and Rx buffers. I allocated the first 128 bytes to reception and the next 128 bytes to transmission by setting the base address for Tx and Rx appropriately. Next, I transmitted a continuou
* To get best reception at a certain frequency, try to make L value variable (example, like the tunable inductors inside radio receivers.) * To do impedance matching between sections, a general rule is to base the L value on available current. Low A, low C, high L. High A, high C, low L.
thanks, ive emailed them and they phoned me and offered to talk, but i couldnt pick up due to being busy.....i now cant get reception on the phone. Anybody any rough idea of the cost?
132212 Last year, Columbia Engineering researchers were the first to invent a technology?full-duplex radio integrated circuits (ICs)?that can be implemented in nanoscale CMOS to enable simultaneous transmission and reception at the same frequency in a wireless radio. That sy
Are you asking about the bowtie antenna provided (years ago) with television sets for UHF reception? An alternate shape was a simple loop. Both types were several inches across. They needed to receive a wide range of frequencies, therefore they did not need selectivity. They could have a lot of shapes and still work, I believe. It was convenient t
As explained the first problem is trggering the timer at launch time. What I fancy is a torch with a LED in it which PWMed. The reception of the PWM keeps the timer reset. So when the missile is launched it gets out of the PWM light beam, so the timer starts. Now as for the servo, seems a lot of technology to open a parachute. This is an idea I p
Hello, I have built a 16MHZ receiver on breadbords and can hear 10 nanowatt transmitter at the other end of my appartment. The problem is that I am using 1meter of piece of wire on a wooden stick as an antenna and compensate its capacitance with an rf choke attached to the antenna end. As a result quality and amplitude of reception depend on nei
I am using RN4677 Bluetooth module from microchip and connecting that to mcu I have checked only Bluetooth module by loading it on the PCB and changing internal buffer of module to 8kb and it works fine. I get continuous data. When I connect the mcu, there is a delay in data reception. I am not sure why this is happening My uart code i
Example widely used for data reception: A is the callback function executed by an interruption. B enable this interruption at the beginning.
Hello, I am trying to communicate with RN4677 (Bluetooth Module from Microchip) from a Andriod device. We are having a issue with Bluetooth where 1. There is a delay in data reception (This happens randomly). 2. There probably is some data loss too (because of which I am getting some junk) 3. The signal strength is not that good (Work
This might have to do with the 5 descriptors used by ham radio operators. Each refers to some aspect of radio reception. '5' means perfect. '1' means unreadable. '5 by 5' means ideal in all aspects.
Hi , i'm doing a project with pic16f1805 , i use a library rs485 from micro c for pic , i need to use interruption in reception of data i simulate with proteus the data is transmitting from master but the 's no interrupt for receive .please can someone help me this is my code : .char Dummy ; char dat; char cnt ; int i,j ; sbit
Hi, I am in the process of designing a quadrifilar helical antenna for the 70 cm band. I am using an old program called Antenna Model, which is good in many regards although falls short from my desire in two specific ways. 1) it fails to take into account distributed capacitance. 2) I would like to simulate the receive frequency response
There is no need for the +-90* phase shifting when summing the audio. SSB modulation does need 90° phase shift of audio and carrier, also demodulation if reception of the other sideband shall be suppressed.
I suggest that you go back to my reply to your similar question about reception with the UART - especially the part where I talk about ensuring the PIC frequency is correct as that is the common cause for receiving more characters than expected in the time. Also check the part where I talk about using a scope on the line to check the BAUD rate. Sus
The first thing is that you are not calling the 'initUart' function from 'main'. Which compiler are you using? Can you use the debugger to step into the code to make sure that it is running at all. Also you are not reading the character form the Rx buffer - for some devices and in some circumstances (not sure if this is the case for you but...) thi
may be that the received signal strength not sufficient. move it to a different location (open space) and check for reception
A plane flying in the area can reflect radio waves, causing multipath, with the result that your reception fades in and out repeatedly for a few seconds.
For a continously tuned HF receiver, the first IF must be above the reception ranges, i.e. for 1-30 MHZ, first If could be 38 MHZ. But for an amateur band only receiver, the IF needs not to be on an amateur band, hence 5 MHZ. Ah, you mean like this? This used an 8.6MHz If
for checking the hardware side.. Just short the RX and TX pin of your controller and check for the transmission and reception.
Hello I want to build an untuned (broadband) magnetic loop for LF to HF (100KHz-30MHz) reception. The loop must have the next characteristics: Frequency of coverage: A preamplifier with a
Hi, I need to understand the meaning of ordering phase of reception scheme in detection process of MIMO systems when I use V-BLAST, K-best SD algorithm or any detection scheme. In some papers consider a reception scheme without the ordering phase (i.e. the substream coming from the first transmit antenna is the first detected, and so on ), if ther
Some cars have a whip antenna with a spiral of wire attached to the stalk of the antenna, as per the attached picture. I have read (on various groups) that the spiral is there to reduce wind resistance and noise, alternatively that it covers AM reception as opposed to the content of the stalk covering FM reception. Does anyone have a good re
Hi I m configuring CAN controller. i m using mcp2515 can controller and 16f876a pic. I read the datasheet, adn as per data sheet configure the bit time in Configuration mode so i done it. Now what should i configure, i m confused. is i have to configure the reception in Configuration mode only? How to proceed?
The howling is not caused by echoes. Instead the howling is caused by the speaker sound being heard by the microphone then is amplified. Since the telephone line has only two wires with transmission plus reception on it then the telephone circuit must use a hybrid circuit to cancel the feedback. Most cheap speakerphones use "voice switching" that m
Are you sure you understand the uart reception? You talk from the side of mC or the PC side? You should check if uart RC flag is set and then read the RCREG and write back to TXREG (so it will be transmitted back to PC as an echo). Post your code here so we can see what code you should add and be compatible with your current program.
Hi, I want to implement the led indication for the Transmission and reception in RS 485 communication using Max487. Also i want to isolate max487 from the controller. 118099 Can anybody please tell whether this attached design is good? If i can do any change so that the design will be much better, please give you
Hi all guys, I have designed a receiver for FSK reception in 434 MHz ISM band. For this I used USRP1 and GnuRadio. Now, I would like to measure performances of my receiver. For this purposes I did following: I transmit over cable using signal generator a bunch of 10000 frames with pseudorandom data, with output power of signal generat
Hello guys, I need some help configuring USART module for Asynchronous reception 9600 bps in a PIC18F4431 running at 4Mhz . I use XC8 compiler and I read the Peripherals support document included with the compiler. Here is my current configuring code : void USART_Init() { unsigned char config,baudconfig; TRISCbits.RC6 = 1;
hi ....I want to design a parabolic reflector for satellite data reception. It has to work for wideband of frequencies i.e from 1-10 GHz. So what type of Feeder I have to use. please help me to design it.
You should give more information about variables of your code, but basically during reception you can take the current byte from reception buffer and so assign it directly to each variable. A typical structure for that is a switch-case operators that allow perform some check during data entry.
PIC24F512GP806 MPLAB 8.8 Hi, I have an application, where user will have GUI, in which he can send data in any of 24 text columns provided, and that 24 texts are transmitted through RS485 to the corresponding controller board based on the ID number given by us in the controller. I have no problem in data reception to the controller boar
Antenna stray lobes depend on desired interference levels required for directivity reception or transmission. 15 dBi peak with 0dBi lobes may be adequate for some applications but for a RADAR signal it might need to be -40dBi depending on dynamic range of signals.
Hello, I have been trying to develop a control system for an RC vehicle. using a different kind of approach. I haave been informed thst it is not very practical one, but I'm trying it anyway just to satidfy my curiosity. The schematics of the tranmitter and receiveer as well as amps developed for outputs are attached. 111081[/ATTAC
Its all to do with interference. Suppose a transmitters covering a certain city has to provide, say 2mV per metre for good reception. Any station on the same frequency must then provide LESS then -40dB (1/100) of 2mV in that city, else it would be interfering with the required signal. So this means that that frequency can only be reused over 100 mi
At this stage (namely the troubleshooting stage), it appears you will have to reduce your setup to the simplest, most basic configuration, in order to test (a) radio transmission and (b) reception. Can you get the receiver to indicate whether it is picking up any signal whatsoever on its frequency? In other words, can you bypass the handshaking p
Reading a lot about SIM900 I was aware of the power supply needs. Today my board is powered with a 5V 2A AC/DC adapter. As I have no trouble in sending SMS, is it possible that the current draw could be higher in SMS reception than in SMS sending ? - - - Updated - - - The voltage on my board is shifted to 4.
MIMO was initially developed to increase digital throughput in wireless systems, especially for relative small distances up to about 20km. I think for a MIMO wireless system would be very hard to work properly at 150km. Diversity, (which was first proposed before WW2), represent a different method to improve reception at greater distances, initia
here is a code for gps reception. if any error ask me here void getgps(void) { unsigned char timeout = 50; do { CREN = 0; DelayMs(10); CREN = 1; while(getch() != '$') { } #ifdef debug puts("$ GOT"); #endif /*GPS HEAD*/ i = 0; gps_data = 0; while(gps_data != ',') { gps_data = getch_timeout(); gps_head = gps
I'm trying to figure out a good AGC circuit for use with the Weaver method of SSB reception. I don't want the out of band signals affecting the AGC setting. I started thinking that if I try to use the initial RF detector's I and Q to drive the AGC then which polarity of I and which polarity of Q that I choose might affect AGC. I'm thinking I have
), wher theta - angle -90..+90 deg. phi = 0 or 90 deg. Next step is to draw radiation pattern in dB: then the radiation (or reception) pattern for an antenna array is simply
hi all, Can any one help me in pointing out the problem. I am using Ethernet interface on MCB2300 Evaluation board using lpc2368 controller it is working fine(easyweb sample code). same code im using in LPC2388 I am able to receive data but incorrect data i am getting(for example im transmitting 0x61 0x61 0x61 0x61 0x61 0x61 0x61 0x61 im gett