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50 Threads found on edaboard.com: Frequency Calibration
Suitable calibration means have to be related to the intended accuracy and frequency range. For moderate accuracy requirements you may do everything with port extension. But you'll see losses of the thin SWG probe cable. My preferred solution would be a self-made SOL calibration adapter using a small chip resistor for 50 ohm load. I (...)
You can use Analog Satellite Tuner to cover 950MHz-2150MHz band but these tuners are almost not produced anymore (obsolete). But the most difficult thing in this project will probably be calibration.Because frequency response overall system will not be flat as desired and a calibration has to be done for each small fraction-at least-of this
Standard BNC Connectors don't work at 4GHz. Max. frequency for this type is 1GHz.
you need to have three lines, thru reflect and delay. yes, you need to design the line for centre frequency.
Hello! how a cable termination is employed with a planar antenna to perform the measurements ??! is there any specific characteristics of the cable in respect with the frequency band of the antenna? the dimensions of the cable/inner conductor? I highly appreciate any information about this mounting scheme ! thank you best regards!
Without a VNA? You need something to excite, receive, and analyze signals. If your frequency is low enough, you might be able to use an oscilloscope, but that would be one sizeable patch. I'm no MacGyver, but I think you're out of luck.
I have time series(magnetic field strength) in mV.I want to convert them to nT.The tutorial says I should perform FFT,than calibration and then inverse FFT.calibration formula is H=0.8V/nT*Fm*Ft*V Fm=jf/jf+4Hz, Ft=1591Hz/(1591Hz+jf) The company has provided calibration files,example frequency MAGNITUDE PHA
Setup: 1) PCB board with two parallel microstrip lines connected to power divider from one side and to two identical diode mixers from other side. One of lines have a gap for common source FET placement. Before placement gap is soldered with copper foil piece for calibration purposes. 2) frequency generator for frequency F goes to (...)
Hello! I tried doing the following: put autognd port on patch edge, run simulation, chose Zin graph. Problem is that Zin is around 50 Ohm at my frequency, wich differs from emtalks calculator that gives value of 200 Ohm ( ) As i understand, Zin is right what i need, but so huge difference makes me doubt thi
What currents are going to flow through this virtual resistor? at what frequency?. Milliohm resistance boxes have very expensive multileaf switch contacts. I would think the way to go is to use a 10W class B push pull audio amplifier and reduce its gain via the NFB loop to give you the output impedance you require. Your main enemy would be DC d
Dear all, I want to use vector network analyzer(VNA) to measure the coupling coefficient of two wired inductors which operated at low frequecny(1MHz). I have consult the user manual of VNA and the operation frequency at 1MHz is permissible. But I don't quie sure that the value is correct in such the low frequency operation. Does anyone
I think that the angular error is .057 degrees - not a lot! I was thinking of an exclusive or gate. If you feed this with two square waves, its output is the difference between them, i.e if they are co-incident there is no output, if they are 180 degrees out of phase there is a constant 5V DC. So with your figure there would be .057/180 X 5 = ~0 (
I am using a monopole antenna and trying to verify its resonant frequency using an HP8753D VNA. The process I am using is as explained below: 1. Calibrate the VNA using S11-1 port calibration method. 2. Connect the antenna using a co-axial cable to the VNA and check the S11 parameter graph over the frequency range. 3. For a length of (...)
If you refer to this document: There is a good description of the factory calibration process, and on page 4 there are plots of oscillator frequency versus temperature. The curve is quite steep. If you know the working limits of your design then you can easily calculate the baud rate change from the grap
I have gone through the ADE7768 datasheet. I have some uncertainties regarding calibration of ADE7768. I am designing a digital meter for 220V 20A. How to calculate frequency of CF to the micro controller and wht mode S0 and S1 to use? V1=30mv and V2=157mv Thanks in advance
If you VNA has 3.5mm connectors, your calibration kit will obviously support your 8720D up to 9GHz. Because 3.5mm connector is a industry standard and it can be used with any VNA brand.I think cal kit is not supported with recent models which have higher frequency of mesurements,that's why it's not been mentioned.
I am designing a multi band antenna and i use ADS to simulate it, i have some warning message when it simulating the S-parameters: inaccuate (high frequency ) calibration; electrically large via using lumped model; higher order modes at the ports; grouped strip-slot ports; mesh density is too coarse; can anyone tell me why did this happ
i have designed a rc osc (type: capacitor charging and discharging) used in a power IC (and i used binary-based calibration for charging current), when i tested the osc output frequency, i found the low frequency jitter is serious(about 5%), that is ,smaller than 50Hz, i'm very confused. what caused the low frequency jitter (...)
It depends on the RTC device. If it has the feature of a clock output as most do, divided down from the main crystal, the easiest solution is to compare it with an accurate frequency source and work out the calibration value based on the difference. For example, if it has a clock/4 output at 8192Hz, read that frequency and derive the (...)
It's always a good idea to press reset first. Set your start and stop frequency. Start as low as it goes, stop around 20 MHz. Sweep type will be linear frequency. Measure will be S21, display log mag. Connect coax cables to port 1 and port 2. Go to calibration menu. Since you're just measuring gain you can just do thru cal. Connect a (...)