This is regarding multi-carrier GSM measurement using PXA. In the SWT/EVM menu, have noticed an option “Carrier BPF Auto, Single and Multi”. Could you please explain this?. Noticed big improvement in muti-carrier SWT measurement with this carrier BPF enabled. For example 6C configuration with 7 MHz carrier spacing, GSMK SWT @1200 KJz showed an improvement of around 6 dB!! Wnat to know what is really happeneing with this option ?
Or, on the instrument, under the Multi Carrier menu, where the “ Carrier BPF” softkey is displayed. Press Help, then the “ Carrier BPF” softkey. This will pull up the information from the user’s guide.
This explains why you might want to use the multi carrier filter when there are carriers other than the signal of interest present. Turning on this filter allows partial or full rejection of the unwanted carriers. I do not have the particulars on the actual filter BW of “Multiple” filter.