Products > Test Equipment

Micsig CP1003/CP503 100MHz/50MHz Current Probe

<< < (18/33) > >>

amar87:
For the bandwidth i have an 45W RF amplifier that can do 150kHz -250 Mhz , i need a high power terminator which i have to get my hands on i already asked arround to borow one ,  i will try to do it like this. I guess it could work if i remove the shielding from a coax and them solder a wire somehhow over the shielding so i can put the probe over the inner conductor + teflon  would work.
I can use my siglent scope on the FFT function (hope it has MAXHOLD) with the current probe plugged into it and then sweep the output of the RF Amp into a terminator and monitor the coax with the current probbe.

The above procedure should give a nice line and rolloff so we could see the bandwith i guess. Please correct me if you see something wrong in what i described above. 

Martin72:
Hi,


--- Quote ---I can use my siglent scope on the FFT function (hope it has MAXHOLD)
--- End quote ---

Has it:

https://www.eevblog.com/forum/testgear/siglent-sds2000x-hd-12bit-(published-for-chinese-domestic-market-only)/msg5213874/#msg5213874

Martin72:
Hi again,


--- Quote ---I guess it could work if i remove the shielding from a coax and them solder a wire somehhow over the shielding so i can put the probe over the inner conductor + teflon  would work.
--- End quote ---

This will also work, you may not even have to solder anything.
I have done this before and am doing it again.
At the moment the Bodeplot is running and the current clamp is the tektronix A6302/A501A combination.
I have set a 1Vrms and the load is simply the input resistance of the scope, as previously discussed and as you have already done.
The Bodeplot should have no problem with these low levels because the scope itself has no problem with them.
I had tested up to 100Mhz and am currently running it up to 50Mhz and maximum number of points, which takes a while.... ;)
Final then still with 20Mhz bandwidth limitation.
Pictures will follow soon.

Martin72:
Here are the results of the good old Tekprobe...
It has a bandwidth of 40Mhz (-3dB), the pictures show the bodeplot once with and without faded-in phase, then again only this time with active bandwidth filter of 20Mhz (switched on at AM501), plus finer resolution of 2dB/div.
That was the setup with external generator, "tomorrow" I will reproduce your first attempt 1:1 with the internal generator.

Martin72:
I have now also tried it with the internal AWG of our 2000X HD, without any problems.
Once with your settings, i.e. 10pts per decade, once with 50.
The finer you resolve the amplitude, the more "terrible" the transmission looks, but if the plot is between +/- 0.5dB, I think it's good.
If you take a resolution of 6dB, you will of course have a dash. ;)
Well, what does that tell us now?
That it works as you had previously thought, even without several windings through the core.
So something must have gone wrong with your attempt, check again.
Oh well:
And the course of the transmission as shown in the data sheet of the CP1003B can safely be regarded as an idealized plot, it will not be the truth.

Martin

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod