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I am using two bcm 43438A, the two devices are putted into a shield box, then I tested them in wifi mfg mode. One device sends 1000 package, the other one only receives around 960 packages.
Below is the wl version
# wl ver
6.37 RC32.0
wl0: Apr 23 2015 20:40:36 version 7.46.3 (r551729 WLTEST) FWID 01-af384561
/ #
THE SENDER COMMANDS
1. ifconfig wlan0 up
2. wl down
3. wl mpc 0
4. wl country ALL
5. wl up
6. wl scansuppress 1
7. wl band b
8. wl channel 7
9. wl nrate -r 11
10. wl txpwr1 -o -d 30
11. wl pkteng_start <MAC> tx 100 1000 1000
12. wl phy_forcecal
THEN RECEIVER COMMANDS
1. ifconfig wlan0 up
2. wl down
3. wl mpc 0
4. wl country ALL
5. wl up
6. wl scansuppress 1
7. wl band b
8. wl channel 7
9. wl nrate -r 11
10. wl frameburst 1
11. wl phy_watchdog 0
12. wl pkteng_start <MAC> rx
13. wl reset_cnts.
wait 1000 packages are transmitted.
14. wl counters | grep pktengrxdmcast
The result: only around 960 packages received. What may cause this problem.
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Manufacturing and Test
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hello:
What is the reason to use so big power setting?
wl txpwr1 -o -d 30