Specifications

Chapter 4 - Operation Menus and Parameters
BreezeNET B 86 System Manual
SNR_Memory_Factor = the Average SNR Memory Factor configurable parameter
(see Section 4.2.6.5.7).
The SNR_Memory_Factor can be -1 in this case the history is not used and the
Average RSSI is the RSSI of the current packet.
The same formula is used also for calculating Average SNR (SNR values are used
instead of RSSI values).
Click the Esc key to abort the test.
4.2.5.3.2 Continuous Noise Floor Display
The Continuous Noise Floor Display option displays continuously updated
information regarding the average noise floor in the wireless link. It also displays
continuously updated information about the Signal Interference Ratio. Signal
Interference Ratio (SIR) is the average SNR for all pulses and physical errors
received by the unit. The average has the same formula used for calculation of
SNR per unit.
Click the Esc key to abort the test.
4.2.5.3.3 Continuous UpLink Quality Indicator Display
The Continuous UpLink Quality Indicator Display option displays continuously
updated information regarding the average quality of the wireless link to the BU,
using the dynamically updated average modulation level measurements. The Link
Quality Indicator (LQI) calculation is performed using the formula:
LQI = (0.9 x "Previous LQI") + (0.1 x "Last Successful Modulation Level").
Each successful transmit will be included in this average, by using the
modulation level in which the frame was successfully transmitted as the "Last
Successful Modulation Level".
In order to receive quick and reliable LQI measurements, there should be
sufficient traffic between the RB and the BU. It is recommended to have traffic of
at least 100 packets per second. The traffic can be generated either by an external
utility (FTP session, ping generator, etc.) or by the Ping Test option in the Site
Survey menu with the appropriate settings (see Section 4.2.5.2).
Click the Esc key to abort the test.
NOTE
If Limited Test is indicated next to the LQI results, it means that the results may not indicate the true
quality as not all modulation levels from 1 to 8 are available. The limitation may be due to the
applicable parameters in the country code, or the configurable Maximum Modulation Level
parameter.