Ageing wireless cards?
Posted: Thu Nov 26, 2020 12:33 pm
Hi to all users!
I got several links not working during all years I've been using Mikrotik devices, to avoid to waste time searching for trouble, I directly replaced both devices on PtP links.
Early radios I bought were using CM9 wireless cards.
I have several CM9 old boards I'm testing.
I got new (still unused) CM9 pair (for AP and client), 5GHz-A, 10MHz bandwidth, 2.4GHz panel antenna (to simulate path loss), test made in a cave (to avoid other RF signals).
Card power 15dB, data rate fixed to 6M, CCQ average value on 60 seconds, sample taken every second.
AP = RB433 with new CM9 wireless card
client = RB433 with new and old CM9 wireless cards
I made test twice, I also changed RouterBoard (RB433), I got same results: old CM9 boards are worse than new ones.
Any idea? CM9 really damaged (maybe lightnings) or simply hardware ageing?
Thanks.
I got several links not working during all years I've been using Mikrotik devices, to avoid to waste time searching for trouble, I directly replaced both devices on PtP links.
Early radios I bought were using CM9 wireless cards.
I have several CM9 old boards I'm testing.
I got new (still unused) CM9 pair (for AP and client), 5GHz-A, 10MHz bandwidth, 2.4GHz panel antenna (to simulate path loss), test made in a cave (to avoid other RF signals).
Card power 15dB, data rate fixed to 6M, CCQ average value on 60 seconds, sample taken every second.
AP = RB433 with new CM9 wireless card
client = RB433 with new and old CM9 wireless cards
Code: Select all
Frequency [MHz] CCQ [%] new CM9 CCQ [%] CM9 under test
5495 100 100
5500 100 76
5505 100 73
5510 100 95
5515 100 81
5520 100 68
5525 100 82
5530 95 71
5535 100 93
5540 95 82
5545 100 71
5550 100 95
5555 95 80
5560 100 70
5565 100 81
5570 100 95
5575 100 74
5580 100 71
5585 100 85
5590 100 85
5595 100 85
5600 100 82
5605 100 93
5610 100 82
5615 100 82
5620 100 71
5625 100 95
5630 100 95
5635 100 76
5640 100 77
5645 100 71
5650 100 95
5655 100 68
5660 100 85
5665 100 67
5670 100 73
5675 100 75
5680 100 82
5685 100 82
5690 100 78
5695 100 79
5700 100 78
5705 100 79Any idea? CM9 really damaged (maybe lightnings) or simply hardware ageing?
Thanks.