Re: TDS 1002 to read high voltage


"anirudh = DANGEROUS BLOODY IDIOT"



first of all,i've got to thank you.I learnt a lot by reseaching this
stuff after your colorful reply :)


** You are in no position to post ANY replies her.

Piss off !!!!!!!!!!


Plus 10 kohm resistors that can stand repeated 6 kV pulses are LARGE
expensive & not readily available.


So far as i know ,resistors DO NOT have a maximum voltage rating.They
ONLY have a MAXIMUM POWER rating.


** Nonsense - resistors have max voltage ratings.

Go look up the maker's data sheets.

For the common, 1/4 watt film types it is circa 250 volts.


** Will drastically load down the 6 kV pulse generator and totally
*****
the measurement.

A current of 0.5 milliamperes is unlikely to do that,though a current
of 0.5 amps might.


** You are a clueless IDIOT.


The resistance values are therefore to be
incresed.In this respect you were right.


** I was completely right.



He is talking about short duration pulses.I am not sure exactly how
short the duration is ,but if the input source is a car battery,its
got to be very short duration indeed.

** Complete DRIVEL !!!!!!!!!!

In such a case,the parasitic resistance of the 10 100pf capacitors
might prevent the final capcitor from charging fully.

** Absolute BOLLOCKS !!

Capacitors DO have parasitic resistances.And they DO take time to
charge and discharge,unlike resistors which respond to voltage changes
instantaneously.


** Irrelevant to the situation of a "capacitive voltage divider".

Do a Google on that phrase - fucking learn something.



Therefore for signals lasting for very short
durations ,capacitors are not the ideal solution .


** BOLLOCKS !!


Because of this
parasitic resistance there will always be a time delay between the
output and input of a capacitor network,which becomes significant for
input signals of very short duration.


** BOLLOCKS


And this is not "bollocks".It is basic circuit theory.


** Shame YOU do not know any.



** It won't work at all, you pig ignorant moron.

as shown above,it can very well work,after increasing the values of
the resistors appropriately.


** Shame how you are totally WRONG !!

A simple 1000:1 capacitive divider will have a very wide bandwidth and very
low circuit loading - plus cheap & easy to make yourself.

Perfect for the OP's application.



....... Phil




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