ConvertingPower Spectral Density to Power. I have a vector signal analyzer which is measuring an OFDM signal with a bandwidth of 20MHz. The spectrum shows "Power Spectral Density [dBm/RBW per 100kHz]" on the Y-axis. The RBW is set for 100kHz. The average power (in time domain) is measured to be 10dBm. I am trying to understand how to convert Is20 MHz better than 40 MHz on 2.4 GHz? Yes you should leave it at 20MHz on 2.4Ghz otherwise you are just reducing the already limited non-overlapping channels within that frequency band. If you set it for 40, it will fall back to 20 during noisy operation. If you're going to use 2.4 already, which is really really bad compared to 5 GHz, then AResource Block (RB) uses 12 Sub-carriers. Assume 20MHz channel bandwidth (100 RBs), normal CP. The number of bits in a 1ms sub-frame is 100RBs x 12 sub-carriers x 2 slots x 7 modulation symbols x 6bits=100800 bits. So the data rate is 100.8 Mbps. For 4x4 MIMO the peak data rate is simply four time that, or 403Mbps. Ifyou have an 802.11n router, then you'll have the option of 20 Mhz or 40 Mhz. Choose 40 Mhz. If you have an 802.11ac router then you'll have the option of 20 Mhz, 40 Mhz, or 80 Mhz. If you're using the Virtual Desktop App, then choose 40 Mhz for compatibility reasons. This is another prioritization feature that can suck bandwidth away Case Power Supply, Fans. Power Supply. Video Cards. How To's. Reviews. Videos. Community. A 20MHz channel width is wide enough to span one channel. A 40 MHz channel width bonds two 20 MHz channels together, forming a 40 MHz channel width; therefore, Gp1f.

which is better bandwidth 20mhz or 40mhz