ART calibrated

Is ART (Atheros Radio Test) at Yun each individually calibrated (I mean Radio calibrated)?

I backup it for safe side anyway.

cat /proc/mtd
dev:    size   erasesize  name
mtd0: 00040000 00010000 "u-boot"
mtd1: 00010000 00010000 "u-boot-env"
mtd2: 00e50000 00010000 "rootfs"
mtd3: 00780000 00010000 "rootfs_data"
mtd4: 00140000 00010000 "kernel"
mtd5: 00010000 00010000 "nvram"
mtd6: 00010000 00010000 "art"
mtd7: 00f90000 00010000 "firmware"

dmesg  | grep -E ": \"u-boot\"|: \"u-boot-env\"|: \"kernel\"|: \"rootfs\"|: \"rootfs_data\"|: \"kernel\"|: \"nvram\"|: \"art\"|: \"firmware\""


[    0.650000] 0x000000000000-0x000000040000 : "u-boot"
[    0.650000] 0x000000040000-0x000000050000 : "u-boot-env"
[    0.660000] 0x000000050000-0x000000ea0000 : "rootfs"
[    0.660000] 0x000000720000-0x000000ea0000 : "rootfs_data"
[    0.670000] 0x000000ea0000-0x000000fe0000 : "kernel"
[    0.670000] 0x000000fe0000-0x000000ff0000 : "nvram"
[    0.680000] 0x000000ff0000-0x000001000000 : "art"
[    0.680000] 0x000000050000-0x000000fe0000 : "firmware"

dd if=/dev/mtd0 of=/tmp/boot.backup
dd if=/dev/mtd1 of=/tmp/u-boot-env.backup
...
dd if=/dev/mtd5 of=/tmp/nvram.backup
dd if=/dev/mtd6 of=/tmp/art.backup
...

make backup copy of art file. if Yun is not individually calibrated then art file should be inter-exchangeable.

One of the guys from DogHunter once said me they calibrate each board individually