Hi,
We've been performing some tests using the calibrator program. However the output power is not as expected - it is several dBm below the requested.
Please see the tests we performed below.
Please advice what we can do to achieve the expected output power.
# TONE ANT1
calibrator wlan0 plt power_mode off
calibrator wlan0 plt power_mode on
calibrator wlan0 wl18xx_plt tune_channel 6 0 1
calibrator wlan0 wl18xx_plt set_tx_power 16125 0 0 6 0 1 0 0 0 0 0 0
calibrator wlan0 wl18xx_plt tx_tone_start 2 0 1 0
# ANT1: 10.7 dBm + loss (~ 2 dBm in filter+stripline)
# ANT2: -34.0 dBm + loss (~ 2 dBm in filter+stripline)
# TONE ANT2
calibrator wlan0 plt power_mode off
calibrator wlan0 plt power_mode on
calibrator wlan0 wl18xx_plt tune_channel 6 0 1
calibrator wlan0 wl18xx_plt set_tx_power 16125 0 0 6 0 1 0 0 0 0 0 0
calibrator wlan0 wl18xx_plt tx_tone_start 2 0 2 0
# ANT1: -35.2 dBm + loss (~ 2 dBm in filter+stripline)
# ANT2: 8.7 dBm + loss (~ 2 dBm in filter+stripline)
# CONT TX ANT1
calibrator wlan0 wl18xx_plt stop_tx
calibrator wlan0 plt power_mode off
calibrator wlan0 plt power_mode on
calibrator wlan0 wl18xx_plt tune_channel 6 0 1
calibrator wlan0 wl18xx_plt set_tx_power 16125 0 0 6 0 1 0 0 0 0 0 0
calibrator wlan0 wl18xx_plt start_tx 200 19 1024 0 0 0 0 0 00:11:22:33:44:55 01:02:03:04:05:06 0
# ANT1: 7.3 dBm + loss (~ 2 dBm in filter+stripline)
# ANT2: -37.4 dBm + loss (~ 2 dBm in filter+stripline)
# CONT TX ANT1 (ALTERNATIVE)
calibrator wlan0 wl18xx_plt stop_tx
calibrator wlan0 plt power_mode off
calibrator wlan0 plt power_mode on
calibrator wlan0 wl18xx_plt tune_channel 6 0 1
calibrator wlan0 wl18xx_plt set_tx_power 16125 0 0 6 0 1 0 0 0 0 0 0
calibrator wlan0 wl18xx_plt start_tx 200 16 2000 0 0 1 0 0 00:11:22:33:44:55 01:02:03:04:05:06 0
# ANT1: 9.6 dBm + loss (~ 2 dBm in filter+stripline)
# ANT2: -35.2 dBm + loss (~ 2 dBm in filter+stripline)
The tests were performed using:
calibrator version 0.78
wl18xx driver that is part of the kernel pulled from https://git.ti.com/ti-linux-kernel/ti-linux-kernel/commits/linux-3.12.y
Firmware: ol_r8.a8.10
wlcore: wl18xx HW: 183x or 180x, PG 2.2 (ROM 0x11)
wlcore: loaded
wlcore: driver version: v3.12.24-1965-gd76e2b2
wlcore: compilation time: Mon Aug 4 14:23:56 2014
BR,
David
