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how to listen to digital data in a cable
hi,i will have to collect data from a digital trasmitting cable whose protocol is known and data is not encrypted. how to listen to data without hurting the regular data flow (electrically without vo...
Hobby Circuits and Small Projects Problems :: 05 Nov 2009 19:56 :: banjo :: Replies: 3 :: Views: 72
help!! htrc110 & 8051
i am using spi to interface htrc110 & 8051 . i have all the codes htrc110 .i wanted to know how to initialize and control htrc110...if anyone has wrkd wid htrc110 den plz provide some basic help to me...
RF, Microwave, Antennas and Optics :: 26 Oct 2009 12:05 :: waliz :: Replies: 13 :: Views: 1170
problem getting cc1000 to receive data
s running in both rx_mode and tx_mode hence i am getting in junk data through my dio pin.i am using manchester encoded mode. frequency 433.134mhz any help is highly appreciated....
Embedded Systems and Real-Time OS :: 12 Oct 2009 3:00 :: olaoni :: Replies: 0 :: Views: 117
serial port transmission pic18f4620
can i have direct acces on the bits trasmitted to serial port? if i wanted to transfer 1011 on the serial port, can i make a program in c# which only transmits those bits (those are bits, not characte...
PC Programming and Interfacing :: 08 Oct 2009 18:00 :: mannnish :: Replies: 22 :: Views: 1937
communication problem between two pic mcs using rf modules
i am trying to communicate two pic mcs using rf modules.....i were connected module direcly to pic to tx and rx pins of mc with baud of 500bps.but it doest works properly can any one help me...rx mc r...
Microcontrollers :: 01 Oct 2009 15:31 :: thand-s :: Replies: 6 :: Views: 237
digital encoding formats
guys i forgot the basics about the digital encoding format(nrz,manchester...) ,i googled around a bit but could not find few things like:1)why is that dc component is not preferred while transmitting ...
Digital communication :: 18 Sep 2009 4:44 :: barath_87 :: Replies: 0 :: Views: 111
using pic for 433mhz rf link
hello,i’m using the pic 16f870 usart tx/rx for sending data over rf link at 433mhz.the usart, works fine with baud rate of 4,800b/s (osc=4mhz).when i’m adding the rf link so the tx usart s...
Microcontrollers :: 13 Sep 2009 20:30 :: FvM :: Replies: 3 :: Views: 378
nrzi and manchester
hi all,i need an nrzi and mancester encoder decoder documentation. please if anybody have docs on implementation of these module share it. ill be very thanks full.regards,master_picengineer...
ASIC Design Methodologies & Tools (Digital) :: 04 Sep 2009 20:14 :: nangsuep :: Replies: 1 :: Views: 231
manchester encoder decoder ic?
is there any site that have manchester encoder/decoder ic (online buy)?...
RF, Microwave, Antennas and Optics :: 04 Sep 2009 20:07 :: nangsuep :: Replies: 1 :: Views: 294
cdma with out carrier modulation
generally speaking, the two major points of cdma transceiver are as following,1, pseudo-random code sequences, like m-sequences.2, carrier modulation and demodulation, like psk, qpsk etc.our problem i...
Digital communication :: 30 Aug 2009 15:28 :: Hectoryx :: Replies: 4 :: Views: 269
whats going wrong with the code?
i bought a rf kit, transmitter and receiver, and the website of a similar product is below. now, im trying to write code for it, just to make sure it is working. http://www.sparkfun.com/commerce/produ...
Microcontrollers :: 25 Aug 2009 17:23 :: betwixt :: Replies: 19 :: Views: 716
connecting rf to pic interface issue
riting up some sort of simple code. ive written in a couple of forums and everyone keeps saying use manchester coding and what not.anyone have any ideas? is it possible to include the rf tx & rx to th...
Hobby Circuits and Small Projects Problems :: 22 Aug 2009 9:33 :: betwixt :: Replies: 1 :: Views: 312
help with schematics - transceiver
http://www.analog.com/en/rfif-components/rfif-transceivers/adf7020-1/products/product.htmldevice: afd7020 -1 transceiver micro controller : picmicroi really need help on this one.my goal is to connect...
Electronic Elementary Questions :: 21 Jul 2009 11:04 :: nagaraju427 :: Replies: 7 :: Views: 915
asynchronous circuits synthesis tools
hi everybody,can someone tell me what tools are used for asynchronous cicuits synthesis ?thanks....
ASIC Design Methodologies & Tools (Digital) :: 20 Jul 2009 15:25 :: SUNBELT :: Replies: 6 :: Views: 399
problem with wireless serial transmisson
as i have bought two ask modules (tx and rx) operated at 434 mhz..http://thinklabs.in/shop/product_info.php?cpath=44&products_id=72http://thinklabs.in/shop/product_info.php?cpath=44&products_id=73and ...
Hobby Circuits and Small Projects Problems :: 17 Jul 2009 20:56 :: betwixt :: Replies: 52 :: Views: 2276
rf modules - external components, correct value of antenna
i have a rf transmitter and a receiver, ask, 433mhz, tx with 4 pins, rx with 8 pins (4 - long distance - 4) - if it usefull, i can upload the datasheet.the questions are: 1. do i have to put any other...
RF, Microwave, Antennas and Optics :: 11 Jul 2009 18:03 :: Vandal S :: Replies: 8 :: Views: 431
manchester c code
i have installed mikroc and they say that there is an integrated manchester code in the libraries (or in the help) but its not that fast.does anybody have an optimised code example for a rf receiver (...
Microcontrollers :: 30 Jun 2009 10:15 :: Vandal S :: Replies: 2 :: Views: 309
how can i calculate the bandwidth of if filter in receiver?
hii am using fsk technique to transmit data through air using rf.the data rate is 50kbps and frequency deviation is 90khz.the receiver uses phase lock loop pll method to demodulate the signal.can any...
RF, Microwave, Antennas and Optics :: 30 May 2009 11:46 :: FvM :: Replies: 4 :: Views: 297
what is the best line code?
can you please tell me what is the best line code in terms of bandwith. why are line codes important in communication ?.....
Digital communication :: 13 May 2009 3:11 :: akmirror :: Replies: 4 :: Views: 351
military standard 1553 protocol - need help
hi guys , i am working on military standard 1553 protocol, in which i got struck at some points. 1. parity generator & checker 2. error detection in message .... i requ...
ASIC Design Methodologies & Tools (Digital) :: 06 May 2009 17:00 :: bharundi :: Replies: 1 :: Views: 135
how to remove the glitches from the output(urgent)
i have designed a manchester encoder in verilog but i am getting the glitches in the output,can any one suggest me the solution of it. i am already storing the output in the register.its urgentthanx...
PLD, SPLD, GAL, CPLD, FPGA Design :: 08 Apr 2009 11:40 :: abhisheksbox :: Replies: 3 :: Views: 339
how to remove the delay from the output of dpll(urgent)
i am recovering the clock from the dpll as manchester data as input to the dpll.but when i implemented the dpll on spartan3 board,output clock exhibits a delay from the input clock.can anyone suggest ...
PLD, SPLD, GAL, CPLD, FPGA Design :: 03 Apr 2009 23:40 :: jawadysf :: Replies: 0 :: Views: 114
heeeeelp plzzzzz am running out of time
unction into an embedded matlab function to be used as a block in simulink?????\here is the m-file% manchester codet=1:200;% logic 1f(1:50)=1;f(51:100)=-1;% logic 0f(101:150)=-1;f(151:200)=1;freqz2(f)...
Digital Signal Processing :: 03 Apr 2009 15:52 :: battousai_47 :: Replies: 0 :: Views: 186
digital phase lock loop design
hello frendzi want to extract the clock from the manchester coded input data ,i have tried to implement the different techniques of adpll but i didnt get the exact result.can anyway suggest the workin...
PLD, SPLD, GAL, CPLD, FPGA Design :: 24 Mar 2009 17:45 :: FvM :: Replies: 2 :: Views: 315
htrc110 rfid
nformation that which microcontroller is suitable wid htrc110..one more problem is that my tag uses manchester coding .. can i detect d same using htrc110i neeed help urgentlythanks...
Hobby Circuits and Small Projects Problems :: 18 Mar 2009 1:44 :: carlosviotto :: Replies: 2 :: Views: 1356
pic rc5 code
es problem when rc5 signal timings are slightly different than standard. none of them actually uses manchester decoding.i am looking for a code like the bascom 8051/avr compilers internal library has....
Microcontrollers :: 19 Feb 2009 21:11 :: btbass :: Replies: 60 :: Views: 19870
communication between at89c2051 microcontrollers
hi,i am new to 8051 micro controller.i am in need of help in my project.i want to send manchester encoding signal from one at89c2051 microcontroller to another at89c2051 microcontroller.how can i do t...
PC Programming and Interfacing :: 07 Feb 2009 10:40 :: jewelSust :: Replies: 0 :: Views: 186
choosing a transmitter/reciever
im new to the whole rf area and i have no idea as where to start. my ultimate goal is to use an infared remote control, remove the led and install a optocoupler in its place. then use that as a serial...
RF, Microwave, Antennas and Optics :: 31 Jan 2009 0:27 :: tanky321 :: Replies: 6 :: Views: 309
read manchester code from u2270
ied to get help from many people on machester decoding. no one could help. so i started to read the manchester code. the idea is, if the width of the pulse is 90us, pic start to sample after 45us. so ...
Microcontrollers :: 24 Jan 2009 20:07 :: viknes1985 :: Replies: 5 :: Views: 2193
encoding in manchester scheme.
hi,how can i encode bits in manchester encoding scheme?suppose i have bits 011010010.now how can i encode this bits?with advance thanksjewel...
PC Programming and Interfacing :: 16 Jan 2009 1:20 :: eltonjohn :: Replies: 2 :: Views: 240
best pic compiler
which one is the best pic compiler?...
Microcontrollers :: 10 Jan 2009 17:26 :: kelv_uk :: Replies: 74 :: Views: 12753
manchester encoding!!!!
hi to all, please can any one help me to build a simulation of manchester encoding.i have found it but its all on vhdl and i culdnt find it on ieee.it should be a simple manchester encoding simul...
Digital communication :: 06 Dec 2008 12:38 :: oister :: Replies: 0 :: Views: 282
how to make automatic measurements and data logging !!
hould i proceed to record certain events and failures during testing an equipment. secondly this is manchester bi-phase data so whole frame or at least a word must be record in terms of voltage, freq,...
Professional Hardware and Electronics Design :: 14 Nov 2008 6:09 :: tpj :: Replies: 2 :: Views: 600
64b/66b encoding/scrambling
hello everyone,this problem has plagued me for over 2 weeks and after all the research ive done im still confused.does anyone know if the scrambling is supposed to occur before or after the encoding? ...
Digital communication :: 10 Nov 2008 6:52 :: mathuranathan :: Replies: 2 :: Views: 561
pll ref clock mod with dds
hellois it possible to fsk modulate the reference clock input of pll synthesizer ic (for ex adf4360) with a dds ic(for ex ad9954) to obtain fsk modulated carrier signal?i use a high bandwidth pll loop...
RF, Microwave, Antennas and Optics :: 20 Oct 2008 18:37 :: 7rots51 :: Replies: 9 :: Views: 819
869mhz link problems - please help!!!
aracteristics are:link settling time 2.5msrange in open field 2000mbinary rate from 500 to 2400 bps manchesteradeunis suggests whip antennas to be used, for high distanses. personally i dont need to g...
RF, Microwave, Antennas and Optics :: 13 Oct 2008 13:02 :: biff44 :: Replies: 2 :: Views: 201
rf pic help??
pls help me where to find rf pic projects and how to program rf pics.maybe somebody could also suggest sites with rf pic pdf.i already know how to program pic microcontrollers using basic but i dont k...
Microcontrollers :: 04 Oct 2008 2:22 :: penoy_balut :: Replies: 1 :: Views: 186
rfid reader ic
hi i am looking for low cost low frequency rfid reader ic.can anyone suggest me the ic thanks...
Microcontrollers :: 17 Aug 2008 16:18 :: xcarriber :: Replies: 56 :: Views: 24399
infra red remote control project
can any one help me in making an infra red remote control project using at89s51 microcontroller and sony remot. please give me the detail decoding of sony remot protocol. a example program written in...
Microcontrollers :: 11 Aug 2008 6:00 :: binu_ji :: Replies: 5 :: Views: 657
need verilog code for manchester encoder/decoder
i need verilog code for manchester encoder/decoder.please help me....
PLD, SPLD, GAL, CPLD, FPGA Design :: 18 Jul 2008 20:15 :: 7rots51 :: Replies: 0 :: Views: 498
manchester encoder/decoder ic,hdlc controller ic
i want the part number of ics for hdlc controller(single channel for 100kbps speed) and manchester encoder/decoder ic,does anyone have it?---...
Professional Hardware and Electronics Design :: 07 Jul 2008 12:58 :: 7rots51 :: Replies: 0 :: Views: 246
manchester encoder /decoder
hi i am urgently in need of vhdl code for manchester encoder decoder can anybody help me in htis regards...
PLD, SPLD, GAL, CPLD, FPGA Design :: 21 May 2008 13:20 :: tooh83 :: Replies: 1 :: Views: 924
encoding shemes.....!!!!!
plzzz give any article or tutorial covering all the encoding schemes egnrz, nrzi, nrzlmanchester, diifferential manchesterbipolar ami, b8zs, hdb3etc...
Electronic Elementary Questions :: 03 May 2008 12:11 :: elec350 :: Replies: 5 :: Views: 239
rf receiver interface to at89c52
hi,can we direct interfacing the receiver output to uc? withou connet any decoder ic.i have one rf transmitter and receiver car remote control. i dont have oscilloscope to measure the incoming receive...
Microcontrollers :: 23 Apr 2008 10:48 :: zanor :: Replies: 37 :: Views: 2064
hi help me please
i have a projecy on rfid . i am using u2270 from atmel . i have a manchester code in output of this chip with 512 us width of pulse . i want read a card but i cannot read real number of this card . p...
Microcontrollers :: 19 Apr 2008 9:24 :: aminr11 :: Replies: 1 :: Views: 282
how to synch. two diff clock.
hi, in a design i am having two clock.clk1 is of 100khz and clk2 is off 50khz and we are talking data at posedge of clk1 and using this data at posedge of clk2,so how to syn. these clks so that da...
PLD, SPLD, GAL, CPLD, FPGA Design :: 10 Apr 2008 16:31 :: EDA_hg81 :: Replies: 20 :: Views: 738
ir receiver with microcontroller
i am working on a project to transmit data from pc to a microcontroller. i wrote my own protocol for transmission (a variation of pwm) but i cant get the ir receiver work. i have a 3 pin receiver. it ...
Microcontrollers :: 05 Apr 2008 18:32 :: padmanabhamh :: Replies: 7 :: Views: 477
warning : :physdesignrules:372 - gated clock.? what is it?
hi everyone, i got this warning message in generating program file under xilinx ise 8.2i.(vhdl)warning :physdesignrules:372 - gated clock. clock net clk_recov_op_obuf is sourced by a combinatorial p...
PLD, SPLD, GAL, CPLD, FPGA Design :: 03 Apr 2008 10:03 :: cherjier :: Replies: 5 :: Views: 990
regarding manchester coding and pulse position modulation
nication system you find that coding is followed by modulation . following this if i try to use the manchester coded wave to ppm modulator . you find that the modulator converts the manchester code d ...
Digital communication :: 03 Apr 2008 6:43 :: FvM :: Replies: 1 :: Views: 87
12f629 interupt
input on a 12f629 useing pbasic on my easy pic 4 .i was hopeing eventually to get the pic to sent a manchester code every 15 seconds but if the int pin is triggered it jumps to a routine that sends a...
Microcontrollers :: 14 Mar 2008 22:00 :: Yantob :: Replies: 0 :: Views: 127
manchester encoder
plz upload the vhdl code of manchester encoder....
PLD, SPLD, GAL, CPLD, FPGA Design :: 11 Mar 2008 12:30 :: master_picengineer :: Replies: 1 :: Views: 213
max 232
what is the function of max232? i know it will convert a input serial signal to manchester coding....
Microcontrollers :: 06 Mar 2008 4:17 :: H_D_R :: Replies: 10 :: Views: 2118
can you give an idea?
in my project (manchester code decoding) i succeeded to decode the manchester coded data. but im getting the data by directly wiring the line to the mcu, my aim is to make it with a wireless method. i...
RF, Microwave, Antennas and Optics :: 04 Mar 2008 0:36 :: mister_rf :: Replies: 1 :: Views: 170
rf & pic
from 1 receiver to 1 transmitter end?should i use uart?how should i encode the data? ive read about manchester encoding..but its rather complex. does anyone has the c source for it?...
Microcontrollers :: 02 Mar 2008 14:28 :: Zhane :: Replies: 4 :: Views: 273
please help!
hi everyoneim using cypress ez-usb fxlp2 to decode a manchester coded signal.my problem is that in my decoding code i tried to do something like that: org 0013h =====>t0isr mov ie,#10000...
PLD, SPLD, GAL, CPLD, FPGA Design :: 23 Feb 2008 11:15 :: volkantr :: Replies: 0 :: Views: 129
manchester coding
i am using pic18f452 microcontroller.i want to send data wirelessly.how do i send using manchester coding?anyone have any example or tutorial for me.i am new in this.thanks...
Microcontrollers :: 21 Feb 2008 14:36 :: s13v3n :: Replies: 0 :: Views: 231
how to convert sinewave to sqr wave from adc samples?
hi friends!, i need to convert the sine wave of a constant or variable frequency usually at the order of few mhz into a square wave so that i can process the frequency information in that square wave ...
PLD, SPLD, GAL, CPLD, FPGA Design :: 15 Feb 2008 6:51 :: xtcx :: Replies: 12 :: Views: 520
programming cy7c68013a in mcs51 assembly???
hi everybody i have a project about manchester decoding, i tried to make it with pic but i failed because pic was slower to do it. after that i decided to make it with 8051 and i already have a cy7c68...
PLD, SPLD, GAL, CPLD, FPGA Design :: 31 Jan 2008 23:43 :: FvM :: Replies: 2 :: Views: 360
programming cy7c68013a in mcs51 assembly???
hi everybody i have a project about manchester decoding, i tried to make it with pic but i failed because pic was slower to do it. after that i decided to make it with 8051 and i already have a cy7c68...
Microcontrollers :: 31 Jan 2008 10:12 :: volkantr :: Replies: 0 :: Views: 180
pic manchester decoding
hi everyonecan anyone help me about decoding this data stream.i found assembly codes on web but they have different protocols and for slower signals.my question is that is it possible to decode this s...
Microcontrollers :: 20 Jan 2008 9:18 :: btbass :: Replies: 1 :: Views: 726
a question about satellite
does anyone know about galileo satellite system?i want ask a question. for galileo system , how many bandwidth does a user segment antenna need?let the segment can receive galileo satellite signals.ju...
RF, Microwave, Antennas and Optics :: 16 Jan 2008 19:15 :: rfmw :: Replies: 3 :: Views: 214
why clock recovery???
can anybody tell me plz : what is the need of clock recovery in digital communication?? how randomization process is helpful in clock recovery and spectral shaping ???...
Digital communication :: 28 Dec 2007 10:11 :: master_picengineer :: Replies: 5 :: Views: 470
syncronisation problem
i modified the xilinx manchester decoder code (xapp339) in order to use command and data sync pulses in manchester enc/dec-oding. quick tutorial for manchester enc/dec.command sync pulse is 1.5 bit ti...
PLD, SPLD, GAL, CPLD, FPGA Design :: 27 Dec 2007 14:02 :: gloin :: Replies: 0 :: Views: 137
manchester decoding please help!
hi everyonecan anyone share assembly code for decoding manchester coded signals and displaying it with using pic microcontoller? the system i try to prove is that a serial bit stream (manchester coded...
Microcontrollers :: 24 Dec 2007 17:15 :: picnoobie :: Replies: 3 :: Views: 333
infrared communication ?
hi i want to connect two mirocontrollers together using infrared ,one circuit will be in a rotating cylinder by a way that it will be always in the same direction of the axis of transmission ,the othe...
Microcontrollers :: 18 Dec 2007 8:57 :: aar :: Replies: 11 :: Views: 768
about xilinx manchester enc. core
hello all,i m trying to run xilinx xapp339, but have a lot of difficulties, is it really working? i m trying to simulate it with modelsim but i couldnt run? in attachment you may see the encoder part ...
PLD, SPLD, GAL, CPLD, FPGA Design :: 05 Dec 2007 10:18 :: gloin :: Replies: 2 :: Views: 183
help: project related to wireless weather station
can somebody help me to do a project related to wireless weather station. the requirements are simply described as follows. function: wireless remote measurement system that communicates at 433mhz. th...
Microcontrollers :: 24 Oct 2007 15:22 :: akilpatrick :: Replies: 8 :: Views: 507
clock and data recovery
hi,any reference about clock and data recovery basics....
Analog IC Design & Layout :: 14 Oct 2007 10:50 :: dachuan315 :: Replies: 7 :: Views: 426
line code...
what is line code? suppose (8,10) means what it represent in linecode? in telecommunication , what is min distance for repeaters.. define skew rate and its value in op-amp......
Digital communication :: 09 Oct 2007 12:56 :: master_picengineer :: Replies: 2 :: Views: 138
clock recovery
hi,i think about designing a clock recovery module. how should i proceed ?...
PLD, SPLD, GAL, CPLD, FPGA Design :: 25 Sep 2007 8:55 :: master_picengineer :: Replies: 7 :: Views: 225
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