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There is an antenna but it will not pickup any external signal. It is quite unusual receiver and setup.
I only want to know how to calculate input voltage from the numbers I read from spectrum analyzer.
I do not confuse things.. I think calling it sensitivity can confuse people (although it is technically a sensitivity level the way we define it in my company). I know, you would normally feed the signal to the input over a coax cable....but our receiver has no input connector and we cannot tell...
The receiver can work as AM or BPSK receiver. At each of the differential inputs we have a carrier and two sidebands. I have only a single ended probe so I have to measure each input separately. I have different criteria for sensitivity than S/N . Ok, calling it sensitivity can be confusing...
Ok, maybe I explained it wrong. It doesn't strictly follow the definition of sensitivity. But, I measure the sidebands the way I explained above at the minimum detectable signal according to our criteria. So how do I add all the numbers to get the result?
Hi, I have a differential input receiver and I want to calculate its sensitivity. So with a spectrum analyzer, peak detector, display units dBuV , I connect to each of the differential inputs. I see the center carrier and two sidebands (modulation signal). At each of the differential inputs I...
I have a signal, which is about 200kHz carrier AM modulated. I need to send it 500m and recover to the same form (200kHz AM). Are there on the market some radio modules that would accept 200KHz analogue input? I am thinking of similar radio modules that are used in remote control ISM bands i.e...
I have a high speed TX DAC that needs to be characterized for SNR, SFDR. The output bandwidth of the DAC is 1GHz. Does anyone know how to measure the above parameters with narrow band equipment?
Can anyone advise on how to build an RF front-end for GSM receiver?
We build GSM900 RX/TX device (base station side) and we do not want to use duplexer (small device, large cavity filters and duplexers are not an option here). Instead we want to have separate RX and TX antennas.
Without any...
I am looking for a solution for MIMO RF front-end.
Normal PLL will lock the RF to the reference but if you have several PLLs using the same reference the RF frequencies will have a random phase (RF to RF).
What I need is a PLL chip or a few of them that lock the RF frequency to the reference...
You still didn't tell the transistor type/package. look for example at package type sot1244B from NXP. The two narrow leads on the gate side are not connocted but can generate resonances depending on your board layout. In your case those dips can be caused by gate side matching and resonances...
I am not sure whether noise is introduced in the GHz range. I think it is more likely that this noise interference happens in the baseband frequency range. When I connect an antenna the noise floor rises and the spurs don't. I don't know whether the interference is with the fundamental freq of...
I have designed a board with a microcontroller (FX2) and 1.8GHz receive chain (LNA, I/Q downconverter, PLL, IF amplifier).
I was trying to follow all the guidelines for low EMI radiation but still I get a lot of noise at the output of my receiver, which I identified as coming from...
Hi, you didn't show your board. Transistor type would also help.
But I can tell you some issues I had in the past with my designs.
I had some dips (although not that many) in the gain when there was a parasitic resonance.
This can come from many sources. Your decoupling capacitors, board design...
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