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I alway thought that vector calculs in general was developed for the analysis of fluid flow. The concept of tourque induced on a paddle wheel in a fluid indicating that there is Curl in a region of flow was the first physical concept that brought all the vector calculus theory to reality for me...
Re: projectile problem
The problem does not invlve much math if you think about it. First you must make the assumption that the mass of the earth is much greater than the projectile.
Then the projectile simply follows an ellipse with the earth at the center. The height of the projectile will...
It could be the amplitude of the signal you are using for your simulation. When the amplitude is high it is possible for higher order IM to intefere with your measurment. IPs need to be measured at different power levels to insure that the reading is consistant. The calculated IP3 should be the...
If isolation is important, a non-reflective switch typically exceeds the the reflective. If the energy does not have a defined place to go, it will go somewhere else, some of that may be undesired.
C
Mazz is correct, but you can use the o-scope even if the Kv is high. The PLL will settle exponentially so if you capture the Vin you can predict settling to any desired accuracy.
To Wilson_yu_chen
To measure IM3 you must put two tones into youe device (DUT). One way to do this is to combine two signal generators with a wilkerson power divider. This divider has isolation between the ports of 15 - 30 dB. This means each sig generator is injecting a signal into the front...
If the signal is small then the IM3 will be very small. Are you sure you are getting an accurate measurement of the IM3 for a small input.
When using a SA to measure distortion, you must rmove the effects of the SA distortion and noise floor from your measurment. The SA will typically have its...
multistage wilkinson
I don't know of a good design paper off the top of my head, but the frequecy of each resonator will be the same. That frequency will be 4GHz. The multistage design will give you wider band width. It is similar to filter design.
The problem you will run into in this design...
There are numerous app notes on active loop filter design. You should be able to find them at national or analog. An active loop filter basically uses an opamp to amplify the loop filter voltage.
There are too many design elements to list here, but an active loop filter with an opamp is the...
adf4360 +programming examples
I have used this chip, It worked as designed. I did have difficulty soldering down the leadles package on my prototype. I used a 10 MHz ref. A 100MHz ref is high, are you sure the device is getting the required ref signal strength?
Are you driving it with the GUI...
Re: Which car is efficient
The spinning wheels store eenergy which will be dissapated upon breaking, so the smaller wheeled car would be more efficient in this regard.
C
Re: Noise Source ENR
NF is the ratio Sig_out/Noise_out over Sig_in/N_thermal.
If the amp input is terminated the output would be G*Noise_thermal+NF, by the above definition.
The hot cold method of NF measurment assumes you don' t know G so two levels of noise are injected to the DUT...
One is a method of locking a signal to a reference, the other is a library for Windows functionality.
Seriously, do you mean a DDS, Direct digital systhesis or DLL, Delay locked loop? To lock a frequency to a reference you must create an error for an offset. A PLL divides the output down to the...
Re: Noise Source ENR
Signals in the air can affect NF measurment. Is you test setup properly sheilded. I have had problems at 800MHz with NF measurments.
A 14dB ENR is plenty of ratio to make hot/cold NF measurments for an expected 2dB NF, but how much gain do you have? If your noise masurment...
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