I've looked and so far have not found anything in Freescan's documentation, wiki or this category that provides information about the units that the RSSI column is with the data logger provided by Freescan (a great product, by the way!). I've heard that the acronym stands for Received Signal Strength Indication, and is a relative measurement of received RF signal strength. I've seen values ranging from 700-800 in Freescan for some scanning I've been doing. What are the units of measurement, or the calculation that provides the units based on the received RF energy?
RSSI units in Freescan
- Thread starter dawntreader
- Start date
-
- Tags
- data logging freescan rssi
- Status
- Joined
- Aug 17, 2010
- Messages
- 1,356
it is just a visual representation of the amount of signal you are getting. as to how much level this actually is, that would depend on the RX in use. i've never used Freescan, but for RSSI to accurately reflect a known level it must be calibrated to the RX in use. all it is is a voltage, the higher the voltage coming from the RX, the higher the level it shows.
for instance i have a program to monitor signal levels and if i use my Icom IC-R100 i get a full scale indicator but if i use one of my old RS scanners i only get half scale and i have to recal my RSSI.
for instance i have a program to monitor signal levels and if i use my Icom IC-R100 i get a full scale indicator but if i use one of my old RS scanners i only get half scale and i have to recal my RSSI.
Thanks for the explanation! I haven't found a way to calibrate the RSSI to a scanner receiver in Freescan, I guess that the units are some factor of the signal voltage that Freescan is provided through the USB to serial bus interface of my Uniden BC346XT. I am getting a "feel" for relative signal strengths between signals, but it sure would be nice to know that 740 was equivalent to 74 mV/m, or some standard signal strength measurement.
- Status
