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Фильтры кварцевые и NanoVNA.

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Channel: Dromidont

#315: How to use the NanoVNA to measure a low-pass filter

#315: How to use the NanoVNA to measure a low-pass filter

Что обнаружил зонд «Паркер» на Солнце?

Что обнаружил зонд «Паркер» на Солнце?

Probe for LC measurements on NanoVNA

Зонд для измерений LC на NanoVNA

NanoVNA

цикл измерений с NanoVNA

UR3QQG

UR3QQJ

LaboratoryW

raxp

raxp2

raxp2.blogspot.com

зонд

измерение индуктивности на nanovna

измерение емкости на nanovna

laboratoryw

ur3qqj

lcr

nanovna

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[music]

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when dragging a

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transceiver hoon or input circuits into h

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or output dpf when independently

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manufacturing inductors,

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it becomes necessary to control their

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denomination obtained so as not to make a mistake

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and 10 times not to take out of the 6 main main

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board an

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existing inductance and

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impedance capacitance meter for small denominations is

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enough expensive ones right there and type D T71

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to solve this problem you can

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use the existing vector

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antenna analyzer, for example on

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Navina, in order to be able to

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conveniently connect and test

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components; it was made on the basis of an

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unnecessary connector; here’s an

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umbrella that

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includes spring contacts so that it does

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n’t spread vomit the native connector on the NK and

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one of the contacts of this probe is soldered

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directly into the central pin with

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protective insulation

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and the second contact is

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a potpan directly to the screen,

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this ensures a minimum installation capacity;

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in order to carry out the measurement you need to

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use a regular diorama face

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porridge Alberta Smith and for me

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it’s already set up in the settings

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as

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parameter 3

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I just do recall 3 I

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already have

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a diagram of the complex

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conductivity resistance displayed in order to

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set it manually if you do not have it

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enabled you need to do the following

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manipulations

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turn on the analyzer

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go to the trace display mode and

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turn off all graphs

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except the

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Smith chart

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all this is enough

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now if we remember

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the properties of the Smith chart, here we have 0 and

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pi dance active on the right side

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infinity of the central part of the writing volume of the

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lower part of this capacitive component of the

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upper reactant to inductive and the

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lowest point of the diorama admit once

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is minus one, that is, purely

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capacitive reactance

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and the upper part i admit once plus

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one, that is, purely inductive

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reactance to these properties and

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we will use it to measure well, for example,

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we have a

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capacitor of

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100 picofarads 101,

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connect it to our probe, now

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we move the marker to the

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central lower point where admit once

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minus one and

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count the

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readings of 102 peak farads,

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that's if we have another capacity of

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120 picofarads for testing because

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this is a percentage and

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again we shift

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to the lower section

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127 picofarads let's

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check what capacity this umbrella actually has,

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when we took it out

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we see Siobhan the axis has shifted

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almost to infinity, which means we

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need to raise the frequency high capacity has

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decreased significantly

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we take stimulus us stop and

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increase the purity, but let's say

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2 9 hundred

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megahertz is

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not enough, it means even higher, this is

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good, it means the capacitance is

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small, it

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also

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says 1300 megahertz,

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great, now let's determine what the

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capacitance of

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this probe

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note is as

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close as possible, on the

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order of

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2 and 8 peak farads,

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this is the so-called

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intrinsic capacitance of the probe which can be

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subtracted during measurements if we have very

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small denominations, they are checked

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well now we have a still

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unknown capacitance, the denomination is not

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indicated

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here, most likely the frequency was determined by the color, the

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frequency was too high, the graph went beyond the limits, let's

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set

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megahertz

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120 permissible,

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almost guessed

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29 picofarads 29 and 7 own capacitance

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2 and 8,

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therefore, the

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capacity is 27 picofarads

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from this capacitor,

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now we also have to adjust the

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inductance, I dropped it from the ADC

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converter puma mask d24 there, according to the

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characteristics according to the writing, they said that

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it changes its inductance from 50 to

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80 on henry,

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now we will connect it to the probe and

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check if this is the

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frequency we need more from we immediately see the

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inductive character the

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dough went here in Poland let's

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say

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180

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megahertz

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almost guessed and

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raise the maximum highest point

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here we have

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the intersection of admins a + 1

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we get 49 and 4 on henry and the strength is visible

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a Now let's try to screw in this ferrite

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core,

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let's see

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how the inductance changes,

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let's raise it above

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60 on Henry,

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let's turn on another

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78 on Henry, come on, closer to

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72 years Henry

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77 on Henry capa, more precisely

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76 on Henry until I

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still have to screw it in

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and it's already starting to decrease I've turned it

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the coil,

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in principle, was not deceived and there is

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from 50 to 78 on Henry

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or there is also a coil I

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don’t remember where I got it from, we

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beat it and we and

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64 on Henry

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how many turns are there one

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two three 4 5 5 turns

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here we also have an output coil dpf

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and

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to us at Tanaan on a frame with a diameter of 4

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millimeters,

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wires

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1 and 2 without insulation and

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with insulation

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1 and 3 to

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1 and 4 to 14 1 and 4 millimeters, the diameter of the

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wire is insulated and

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three turns,

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the coil is made with the expectation that an

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inductance of the order of magnitude will be obtained 33 on on

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henry

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the calculation of a single-layer coil is carried out

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according to the well-known formula

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this number of turns of such a coil

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is equal to

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3 and a half turns

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3 bound turns I wound 3 now let’s

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take measurements

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before that we need to loosen the springs a little

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connect the tested inductance

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so often it’s not

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enough

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let’s raise it let’s

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make it

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200

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not enough yet

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220

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megahertz

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is not enough,

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270 are

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almost out and

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we move the marker to the top point of the Smith chart,

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we get 33.9

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per henry, the

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calculations almost agreed with the result and

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this is pleasing, with

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such a simple method you can do

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and

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check

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unknown capacitances and inductances of

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very small values of the order of per henry

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and picofarad units

Description:

Зонд для вимiрювань LC на NanoVNA / Probe for LC measurements on NanoVNA

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