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249 Threads found on edaboard.com: Frequency Meter
If you are measuring with LCR meter Supplier specified inductance value, test frequency and biasing current. normally the test voltage do not have major roll, Test voltage at 0.1V is the best practice
133701 It means the measurement in parallel or series. Normally high inductance at low frequency will consider as parallel measurement. Low inductance at high frequency will consider series measurement. See the chart for more clarity. Hope it is helpful
my antenna is in nano meter size... and got a frequency in 800 to 1000 thz. below -10 db of return loss.used Gold and silicon dioxide as matarial. got 4.81 dbi directivity.... but very very low minus scale efficiency... then i understood it was a port mistake... we can not simply generate the rectangular wave guide port for achiving thz (...)
I bought this 8 digit wide range frequency meter from Ebay at 10 $ but instructions came in Chinese and seller failed to give any instr in English Model PLJ-8LED-H please help
The LCR meter detects the voltage, current and phase angle of DUT. Thus, The DUT can be represented as L, C or R. But, why we have to match the frequency of LCR meter to the frequency that DUT is tuned for? When we change the test frequency, the reactance must be changed. Causes the voltage, current and (...)
hi, Typically for counting a frequency input, TMR0 is used for the Timing Gate and Tmr1 16 bit is used to count the input pulses/frequency. Tmr1 interrupt is used to increment a overflow counter. At the end of the TMR0 gate period, the overflow count and the contents of TMR1 are proportional to the frequency. E
Specifications(thus far): Excitation Signal frequency range: 50Hz(or 10Hz if there are any point in starting there) to 1MHz. Excitation Signal Amplitude: 1Vp-p to 20Vp-p. Excitation Signal Output Current: 1A(I suppose that would have to be ?1A). Reviewing the previous discussion, I guess you'll face serious difficulties to imp
Use an inductance meter. The VNA is useful for measuring the self resonant frequency not the inductance. The Q is easier to measure with a VNA. Resonate the inductor with two known high Q capacitors at the freq of interest and measure the -3dB bandwidth of the network. Then use the relation Q= Fc/BW and solve for BW. The caps should be connected i
Hello I would like to measure Voltage swing Vpp (or even Vmin and Vmax) in up to 50Mhz range with help od DC multimeter and a reasonably simple and cheap diy circuit. There is a lot of schematics on the net based on diode rectifiers, but these will not work at high frequency. I will be grateful for useful links Truffaldino
I need an instrument that can detect signal errors. A signal should be able to go from example 100Hz to 400Hz without error detection but if, say, an rising edge diffs more than 10% in time compared with the last rising edge then I will get a beep or a light. A mobile one would be nice. Anyone know about such a meter?
Dear All, I just bought my first LCR meter Applent AT825 and faced issue when testing it. I measured capacitance of 22 uf Panasonic NHG series aluminium electrolytic capacitor with this meter and same thing with Agilent U1252B multimeter. Well Applent is 4 wire meter and dedicated measure this but Agilent tells it has (...)
are we supposed to read your mind about what frequency you are using?
How did you measured that, by DVM or Scope meter ? It is important if you can determine if this noise has a fundamental frequency determinable, or if seems like a white noise. In addition, you could inform how the circuit was tested, if in a PCB properly coppered by ground plane, or if it was assembled at a breadboard.
Hi, There are dedicated "energy meter chips". Do you want to use one of them? --> if yes, then read their datasheet and application notes. If you want to use the PIC inside ADC: * there are a lot of examples and hobby solutions in the internet. Read through them. * in general you need a fixed and stable sample rate to read both voltage and curre
An LC filter at this frequency AND bandwidth it will not work properly mainly due to the low values of components, which will be in the range of fF and pH. Cavity or a SAW can give appropriate performance. For SAW filters check, Murata, TDK, Taiyo Yuden, Tai-saw
AD 8313 is a nice logarithmic detector that can be used over a wide frequency band. See data sheet for details. Due to the wide input power level range, a RF band-pass filter should be used before RF input, otherwise the output voltage resonds to any interference. I used it but I had no need for any simulation. What do you expect more than AD spe
For measuring the Q factor of RF Inductors at High Freguency, I know we should use a network analyzer and measure S parameters. However, I need to measure the Q factor of an Inductor at low frequency (100KHz to 1MHz). Do I use also a network analyzer or is there any other device? Is network analysis the only way to measure the quality factor of Ind
Hello. I am developing a LCR meter that will function on its own but can also be connected to a PC to communicate with Matlab, and on one hand I want it to be able to measure Impedance at 100Hz, 1kHz, 10kHz, 100kHz, 500kHz and 1MHz but I also want to perform a sweep over that range so I can plot(in matlab) impedance vs frequency. I am trying
Rocks are like a mixture of weak resistance and capacitance. They make great insulators unless moist with contamination ( clay) becuase water has a dielectric constant 60x greater than air. Since all insulators are capacitors between any two conducting points, there is a risk of charging current on capacitance giving a lfase reading unless stable,
I've just fried my Extech EX730 clamp meter while developing something that used a 230V-12V transformer in reverse, and 18V on its secondary. Given that the meter is rated to 600V, I figured there would be no problem! Now I have a meter on which only the temperature and frequency functions work - everything to do with (...)