NWA1123ACv3 Energy bursts accross 2.4GHz channel 1 and 11

ASGR

Hello Support,

Please can you tell me if this is normal behaviour?

The image shows a scan from the 2.400GHz to 2.433GHz, channel 1, taken from my TinySA Ultra+. I've isolated it to the wireless router and bursts change as I change channels. I get the same high energy bursts on channel 11. It is not continuous but changes through out the day. Usually, I observe a consistent diagonal dot pattern.

When I switch the router off, the burst disappear. What is more interesting is that when I leave it turned-on, connected to the switch, but disconnected from the firewall, the bursts also stop as if externally triggered.

I tried installing the latest firmware but the high energy bursts continue? Please advise…

Current set-up: Netgate 1100 → Zyxel GS1900-10HP → NWA1123ACv3

Output from Tiny SA Ultra+ 2.400GHz to 2.433GHz (1) and 2.441GHz to 2.483GHz (11):

SOURCES:

https://en.wikipedia.org/wiki/List_of_WLAN_channels

Zyxel_Melen

Hi @ASGR,

Before we check this issue, may I know some details first?

1. What makes you want to check it with the Tiny SA Ultra+? Is there any issue trigger you to check?
2. "I've isolated it to the wireless router and bursts change as I change channels" What do you mean change channels? The Wi-Fi radio channel? Or?

Thanks for sharing the information.

ASGR

Hello Melen,

I bought the TinySA to monitor other external factors in the 2.4GHz to 2.5GHz frequency range unrelated to the wireless router and then by chance I noticed these intermittent high energy burst. They are not consistent but somewhat random.

Initially, I assumed that the bursts were external to my environment but noticed that the bursts power levels were generally the same power level as the observed normal wireless router transmissions. I took readings from different locations (distanced/obstructions) and the power levels were generally aligned.

I use my Gigahertz Solutions HF-32D to scan my environment so I am aware of all the devices that eminate any supported radio frequencies and turned them off one by one to find the culprit. Through a process of elimination I identified the wireless router as the source. However, I will continue to collect data to confirm.

Yes, the radio channel. I see high energy bursts on channel 1 and 11 as I change configuration for the 2.4GHz radio.