Cambium Networks cnReach N500 Handleiding (253 Pagina's)

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cnReach N500 User Guide System Configuration

phn-4980_001v004 August 2019)

2-70

Tx Rate and Rx Rate are the instantaneous rates of how fast data is moving.

Cur Rx Percent is the current communications success rate.

The Freq column specifies the channel frequency. Refer to Hop Tables for channel frequencies per

modulation.

When assessing Noise, look at “Average” as opposed to “Max”. ISM Noise levels vary depending on how

many radio systems are in the vicinity and how their hopping pattern and timing parameters are

configured. ISM is License Free which makes it a popular choice and although most systems use

hopping technology to coexist in the same spectrum, noise can become an issue in high traffic areas

with multiple overlaid systems.

Sampling the noise floor at various locations on a prospective network is something that Cambium

Networks recommends as part of the link design process. The more the system designer knows about

the RF environment, the better engineered the system can be.

Attention

Installing radio systems without sampling the noise floor can, in some cases, lead to

unexpected performance. Cambium Networks recommends sampling the noise floor or at

least making an allowance for a higher than expected noise floor in the link budget.

When assessing Signal look at the “Average” as opposed to “Max”. Consult the RSSI scale to ensure

the signal isn’t too weak or too strong; see how to tune RSSI.

Fwd-Pwr is the output transmit power of the radio and should represent the transmit power setting

Radio/RF Settings.

Reverse Pwr is the reflected power coming back into the radio from the transmission system and

should be =<10% of Fwd-Pwr.

Attention

High Rev-Pwr indicates elevated VSWR, which usually means damaged coax, a faulty

connector or water ingress (either in the coax or connector).

Coaxial connectors, coaxial cables, antennas and then the radio should be checked.

% Occupancy indicates the % of the time the radio went to transmit on the specified frequency and the

noise measured was above the Diagnostic Threshold.

PA Current is the current being drawn by the Power Amplifier, in mA.

Diagnostics/RF Ping

The RF Ping Utility enables the direct testing of connectivity and signal quality between an Access Point and a

remote End Point. The test can be initiated from either side of the link.

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