Hi Guys,
I am just wondering if you can answer this question.
What would cause the SNR to drop from 25/30 to 15 for a few seconds and for it then to jump up again?
The RSSI remains stable at around 50 but the SNR drops randomly by 50% from time to time? Surely if it were noise it would be more consistent?
@Wibernet wrote:Hi Guys,
I am just wondering if you can answer this question.
What would cause the SNR to drop from 25/30 to 15 for a few seconds and for it then to jump up again?The RSSI remains stable at around 50 but the SNR drops randomly by 50% from time to time? Surely if it were noise it would be more consistent?
Wibernet,
For 450 platform, the SNR is a measurement on the data that is based upon the receive modulation of the data. If the modulation of the data goes down, the SNR will as well. SNR for this reason SNR is not accurate on MIMO-A links. I'm guess you would see the modulation moving on the link as well. Also if there is only very little user data traffic that is small packets it can cause false low reading.
A Link Capacity Test with SNR Calculations enabled will force user data and give an accurate reading. You can also do Extrapolated Link Test not to flood the traffic on the link.
For these reasons we developed EVM, which is a more accurate stat and not dependent upon user data traffic for a reading. I recommend switching to monitoring EVM.
Charlie
Would it maybe a good idea to switch cnMaestro to use EVM then?
Terry
