Hello,

I´ve got an p2p link with 2 rb500 (each a 23 dBi antenna).

Monitor on the rb500 configured as stations shows me following values:

------------------------------------------------------------------------
status: connected-to-ess
band: 5ghz
frequency: 5520MHz
tx-rate: 36Mbps
rx-rate: 36Mbps
ssid: "lonhoe001"
bssid: 00:0C:42:05:01:0B
radio-name: "000C4205010B"
signal-strength: -78dBm
tx-signal-strength: -86dBm
tx-ccq: 24%
rx-ccq: 21%
current-ack-timeout: 44
current-distance: 44
wds-link: no
nstreme: no
framing-mode: none
routeros-version: "2.9rc7"
last-ip: 10.22.1.6
-----------------------------------------------------------

Can somebody explain me, why "signal-strength" and "tx-signal-strength" are so different? What does "tx-signal-strength" mean?

Thank You.
Stefan.

I have been wondering about this as well.. shoulnt they be the same?

The signal strength is from the client. Tx signal is of course your signal strenght -- this is reported back to AP by the client. If your client is not RouterOS, you won't be able to see your tx signal strength.

John

to expand and simplify what john said,


signal-strength = rx-signal-strength

tx-signal strength is just that...

ok Ill bite on the explantion.. but can you explain why the signal is differnet?

If I have 13db radio and 14 db antenna conencting to a 14db antenna and a 113db radio.. shouldnt the signal be the same on both sides?

Different signal strengths sometimes indicate misalignment.

If you have a north-south link and the south end points (example) 15 degrees east, it (south) will hear the north side almost as good as it would have pointed exactly at each other. However north wont hear south as easily as much of the energy is going in the wrong direction.

but doesnt that make the south antenna have less gain in the way of the north antenna, making the south antenna hear equally less power as it is putting out?

because the gain pattern of the antenna affects how well it hears, and how well it talks.I thought...

You can have reflections that cancel signal power only at one end.

John