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Range will be short if: (a) transmitter is weak, or (b) receiver has low sensitivity. The antenna makes the most difference when sending or receiving. There is no easy way to make up for a poor antenna. What can we change in the router? about the only thing I've seen that I can change, is how secure is the antenna's threaded connector. I (...)
Nobody uses 1MHz wide AM. Are you talking about something like 64-QAM ?
You'll also think about receiver bandwidth, sensitivity, signal-to-noise ratio...
The super-regen works by by increasing the Q of the (one) tuned circuit. So gain and selectivity increase at the same time. I agree that the Q of the single tuned circuit is high. Then it has a bandwidth at its peak that is much too narrow and does not have steep slopes away from the peak which causes poor selectivit
at 2.4 GHz you would need a large dish in excess of 3 metres to get a narrow ( less than 5 degree) beamwidth conversely, at 24GHz, a 4 degree beamwidth is achieveable with a dish of ~ 1 metre Im sure some one here knows the maths for working that out You havent really given us all much to go on to try and help you. How about explaining your
Sounds VCO Pulling Effect because of Doubler. PLL may not pull-in the carrier in high pulling effects and therefore VCO signal can have some ringings about carrier. I guess an isolation amplifier should be used before doubler.
Hi all - I have been reading quite a few papers about optical communication and came across several different graphs/results on receiver sensitivity. One example is, , page # 3. Does any one know how to plot the graph shown in page#3 of the above paper? I can't seem to find this fe
Hi all - I have been reading quite a few papers about optical communication and came across several different graphs/results on receiver sensitivity. One example is, , page # 3. Does any one know how to plot the graph shown in page#3 of the above paper? I can't seem to find this featur
Most RF engineers are thinking about receiver noise in terms of sensitivity. It's not surprizing to me that you didn't get satisfying answers at TI forum, because it's essentially focussed on application rather than RF IC design problems. Transceiver chips are designed to achieve good performance with minimal external frequency selection (...)
We talk about receiver, so: 1. NF/sensitivity 2. Selectivity, Co-channel rejection, Blocking 3. Probably flatness too
Only an RF System analysis (including radiated TX power and antenna gain) it will tell you the answer. Is related to a lot of system requirements that the receiver should met. As: sensitivity, intermods, blocking, etc, factors that are influenced by the transmitter in a half or full duplex RF system. Generally a duplexer gives about 50dB (...)
This is a standard procedure to get the all-channel radiated sensitivity, using as a reference a quiet channel (Reference Channel). I don't know what wireless system is about, but I would prefer when doing radiated sensitivity to use BER (bit error rate) instead FER (frame error rate). BER is direct related to SNR of the (...)
It's not about the antenna. It is about receiver noise floor that depends on the bandwidth of the receive channel. Signal to Noise Ratio SNR ::
If you ad an LNA with gain about 15dB and NF below 1dB, followed by a good coax cable, definitely you will get better sensitivity. Use the freeware program AppCAD to see the effect on sensitivity when add an LNA and cable to your receiver. After installation go to System-Signals/ NoiseCalc AppCAD
Hi, all As the formula says, sensitivity=-174+NF(dB)+10log(BW)(Hz)+SNR(dB), the noise is integarted in the bandwidth, but, as to the sensitivity level, it's for one tone? or the power level spreaded in the bandwidth? thanks in advance
Hi all; I am a sophomore student at a university and we have a term project for the course: "Analog Electronics". We will be doing a transceiver at public band level (28.-29.7). We have learned some information about components of transceiver, but I could not understand something for receiver circuitry. First of all We have two IF Amplifiers. W
Take care about one important parameter that is the data rate/freq deviation (and the relative receiver bandwidth). Working with low data rates the RX sensitivity varies a lot, so the achievable range is very different if you have 1kbps or 250kbps. Which kind of application are you working on? Mazz
sir, i am using tsop 1738 for receiving the ir beam which was generated at 38khz and transmitted by ir led and the output of tsop is always maintaining high at 5v....i am not able to know whether it is receiving the beam or not...i cant understand the problem so pl help me...
Dear all friends, I want to talk with you about the active antenna. It is said that the active antenna could improve the sensitivity of GPS receiver or FM receiver. Could someone tell me why? I remember that I have read one post about the active antenna on . The friend said that because active antenna (...)
I am working on FM receiver IC and I have some questions about sensitivity I saw different datasheets and they mentioned differently in sensitivity. Basically, I can see several of them in the following (1) dbm (2) dbuVEMF (3) uVEMF Can anyone tell me what is uVEMF and how can I convert it back to dBm as I need (...)
Can somebody please tell me how a call is placed using a landline phone, and what signal is sent back to the calling party when the called party has picked up the phone? Please do not barge in and hyjack this thread about IR receivers. Please make your own thread about how a telephone system works or look in Google to see h
Here you can find a tutorial about a link analysis for an FSK system (the same as FM). To find the required RF transmitter power you have to know some other RF parameters as: receiver sensitivity, antenna gain (RX and TX), losses, frequency, fade margin, etc.
Hi, I do not know about UWB standard however the dynamic may be determined by the reference sensitivity (noise figure) from one side and by the maximun signal you can have at the input of the receiver with some margins taken for the envelope variation. Hope this helps. Regards.
Do you have some lit. about low frequency, high sensitivity receiver chains in CMOS?
I saw something like sensitivity ~ 2uV EMF selectivity Is there any standard international standard for civilian FM radio receiver? And what about GPS receiver? No formal test spec. yet?
Suggest me that how to calculate sensitivity of an receiver also give me the formula if any also explain about sensitivity
dear everybody , help me please i have some problem about transimpedance amplifier sensitivity. if the sensitivity=-29dbm than , how much value are the gain? i don't know how to calculate the TIA(transimpedance amplifier) 's sensitivity :cry::cry::cry::cry::idea:
i think due to the noisy eye; you cannot accurately perform BER testing or estimate sensitivity based on the eye diagram. i experienced the same situation about a year ago. first of all please confirm that the noise and jitter observed in the eye diagram is caused by design or layout issues and not by your test setup. secondly; understand
Hi.. You need to know about Enery per bit(E0), Data rate(DR), Noise power per Hertz (N0) besides bandwidth(BW) to find SNR.. No=kT where K=boltzmann constant T=temperature in kelvin Then you can use log((E0*DR)/(N0*BW)) to find SNR ... I hope it helps...
Hi all, I am looking at the USB 1.1 Spec, but I can't understand the input sensitivity of 200mv between D+ and D-. Does it mean that the data transition should be occured within 200mv of differencial voltage or when exceeding 200mV? Also, I don't know exactly about the common mode range. I just think that the input of the receiver can (...)
Hi all, i want to know when and why to include the processing gain Gp in CDMA in the following calculation: 1) noise figure 2) phase noise 3) ip3 thank you c.m.
Hi, I am looking for literature / material for the following question: For ~10 years, the GPS receiver sensitivity improved from ~-140 dBm to ~-160 dBm. The noise figure of RF receiver part remain similar < 1.5dB. And seems the difference is in DSP correlator part. To my knowledge, older GPS digital chip, say GP2021, deploys 12 (...)
Dear People, I have some queries here about Rx Optical sensitivity Measurement. The measurement for the sensitivity of a receiver is given by the formula according to Maxim datasheet :- sensitivity = 10 Log { in * SNR * (re + 1) } dBm (...)
No but you could use your transmitter and measure the received signal power with a spectrum analyser at the input of the receiver. Forget about about the network analyser, you need modulated data at a fix frequency which is not at all what's generated by network analyser. See ya