to create and rate content, and to follow, bookmark, and share content with other members.
VMC Cal input power offset
Question asked by
on Oct 13, 2010
on Oct 14, 2010 by Dr_joel
Show 0 Likes
I ran a VMC cal and set the input power to -10 dBm. When I setup a VC21 measurement, I saw that I had -11.55 dBm at the end of the cable instead of -10 dBm. Isn't the VMC calibration supposed to take care of that loss? Thanks...
No one else has this question
Mark as assumed answered
This content has been marked as final.
Show 1 comment
(Required, will not be published)
Oct 14, 2010 7:21 AM
No, VMC takes care of the ratio measurements (b/r) so that the gain is corrected, but not the source power. You can also correct the source power by doing a source power cal separately. Notice that when you do a VMC cal you don't use a power meter.
SMC uses a power meter as a reference, and corrects for input and output loss and corrects source power at the same time. SMC gives the best results for amplitude response, VMC is needed to get phase response, but has more uncertainty in the amplitude response.
Show 0 Likes
Retrieving data ...
[WMV] 介紹CMOS OP放大器的DC, AC及Transient模擬
Two Types of Antennas You Can Design With ADS
How to draw structure in in Momentum and EMpro by paramters
Antenna Design Using Fully Integrated 3D EM in ADS
Adding a Port to an Antenna and Moving one antenna relative to another