Carrier to Interference Ratio (C/I)
Carrier to Interference Ratio (C/I) Measurement is a two-step process, first measuring the
carrier level and then, with the carrier turned off, measuring the remaining signals and noise
in the band of interest. After the two measurements are complete, the ratio of the carrier
level to the noise plus interference is displayed using three assumptions:
q
The interferer is a narrowband frequency hopping signal source (NB FHSS)
q
The interferer is a wideband frequency hopping signal source (WB FHSS)
q
The interferer is a broadband signal (BB)
The primary application for this type of measurement is determining the magnitude of inter
-
ference problems for 802.11b, 802.11g and 802.11a access points (hot spots).
Procedure
Step 1.
If necessary, press the MODE key and use the Up/Down arrow key to select the
Spectrum Analyzer mode. Press the ENTER key to select.
Step 2. Press the
Signal Standard soft key. Select the appropriate signal standard based
on the signal to be measured and press ENTER.
Step 3. Press the
Select Channel soft key, select the operating channel of the access
point being measured and press ENTER.
5-19
Chapter 5 Spectrum Analyzer Measurements
Figure 5-11. Signal Standard and Channel Selected
To Next Page
Loading...