Keysight M9383B Measurement Manual page 92

5G New Radio (NR) Measurements using X-Apps
5G Waveform, EVM, and ACP Analysis Using X-Applications
— Trace 5: shows the detected allocations of all channels/signals within the
— Trace 6: shows EVM, Power, and Number of RB of the individual
The Frame Summary table shows Num. RB for PDSCH of 1056 and 1016 for
TIP
PDSCH-DMRS. The signal configuration has only 66 RBs, so why the big
change in the measurement result?
The RB result in the Frame Summary Table is per Slot. In this example
procedure, we changed the measurement interval to 2 Subframes, which is
16 slots for 120 kHz numerology (8 slots/subframe). 66 * 16 = 1056. For
PDSCH-DMRS, the value is 1016 because two of the 16 slots overlap with the
SS Block which occupies 20 RBs resulting in 20 RBs being punctured from
DMRS in these two slots. Therefore, the total RB Number for DMRS is 1056 -
20 * 2 = 1016.
92
measurement interval (2 Subframes in this example).
channels/signals.
M9383B/84B Measurement Guide