Low throughput in Wifi mode (Controlled environment - Lab)


#1

Hi All

After long waiting, we finally got A5c & C5c !!
Before outdoor installation, we want to run some tests in the lab to understand the max performance (As reference) for link optimization.
So we built limited setup with 1xA5c + 1xC5c connected with 2 RF cable + 40 dB attenuators.
(We connected C5c RF ports 1&2 to A5c RF ports 3&4)

Link setting

  • RSS ~40dBm
  • SNR > 30dB
  • Stream 2x2
  • CBW 20/40/80Mhz
  • MCS 9
  • PER < 1%

The results we got doesn’t make any sense

Wifi Mode (1500 Bytes)
—20Mhz : 47Mbps full duplex (Tx/Rx:47 /47, aggregated throughout 94Mbps)
—40Mhz : 47Mbps full duplex (Tx/Rx:47 /47, aggregated throughout 94Mbps)
—80Mhz : 47Mbps full duplex (Tx/Rx:47 /47, aggregated throughout 94Mbps)

How throughput remains the same for all channel bandwidth ?

changing to SRS mode (tx/rx ratio is fixed to 50/50)

SRS Mode (1500 Bytes)
—80Mhz : 350Mbps full duplex (Tx/Rx:350 /350, aggregated throughout 700Mbps)

Please advise …

10x!