9/14/2023 0 Comments Rsrq signal strength![]() The LTE downlink graph comes from a Sprint site in the Kansas City area in late April, well before Sprint stopped blocking devices from live LTE sites. To illustrate, I captured this power vs frequency sweep with a spectrum analyzer. In other words, of the 300 subcarriers, 100 transmit periodic reference signals. And of those subcarriers, one in three carry LTE reference signals. A 5 MHz bandwidth downlink, which is the configuration that Sprint is deploying, contains 300 subcarriers. To understand why, we need to learn the differences between two types of signal measurement: Received Signal Strength Indicator (RSSI) and Reference Signal Received Power (RSRP).įirst, an LTE downlink is divided into subcarriers. But -102 dBm is actually relatively healthy LTE signal level. If this were measuring CDMA1X or EV-DO, then, yes, -102 dBm would be nearing the margin of usable signal.
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