The chart shows the latest 60 seconds. Each label “<n>” on the x-axis means “n seconds ago”.

The y-axis has both dBm and percent scale marks.

RSSI: Received Signal Strength, equal to UTRA Carrier RSSI.

SIR: Signal-to-Interference Ratio (dB).

TxPower: UE Transmit Power (dBm).

TrCH BLER: Block Error Rate in percent, average taken over all downlink transport channels (DCH only).