Dear Forum!
The following wireless specifications are given for the RB951G-2HnD router:
2.4 GHz Transmit (dBm) Receive Sensitivity
6MBit/s 30 -96
54MBit/s 25 -80
MCS0 30 -96
MCS7 23 -78
My question:
Is it possible to reduce the transmit-values via RouterOS in order to be less exposed to radiation (e.g. to achieve values as they are specified for the RBwAP2nD:
2.4 GHz Transmit (dBm) Receive Sensitivity
1MBit/s 22 -96
11MBit/s 22 -89
6MBit/s 20 -93
54MBit/s 18 -74
MCS0 20 -93
MCS7 16 -71
Re: Wlan: Reduction of the transmission strength
Currently it is possible to set tx-power property of wireless interface. Actual Tx power might be lower than this, actually it is the lowest value of the following:
If you set this property to, say, 24 dBm, and your country regulation is, say, 25 dBm with antenna gain of 3dBi, then actual Tx power will be limited to 22 dBm due to country limit (25 dBm - 3 dBi) for all rates.
Another example: tx-power setting to 24 dBm, country regulation limit 30 dBm and antenna gain 3 dBi: actual Tx power will be 24 dBm for rates lower than MCS7 where Tx limit will be 23 dBm.
Some people argue that this kind of Tx power capping is not nice to client devices near to coverage edge as they receive almost full throughput at one moment and loose signal at next moment (not my own view).
In previous ROS versions it was possible to reduce Tx power by increasing configured value of antenna gain which made the first rule to kick in. In latest versions of ROS, however, it is not possible to change antenna gain on devices with built-in antennae.
- country regulation limit, reduced by amount of antenna gain
- maximum chipset capability (that's the table you posted)
- setting of property tx-power
If you set this property to, say, 24 dBm, and your country regulation is, say, 25 dBm with antenna gain of 3dBi, then actual Tx power will be limited to 22 dBm due to country limit (25 dBm - 3 dBi) for all rates.
Another example: tx-power setting to 24 dBm, country regulation limit 30 dBm and antenna gain 3 dBi: actual Tx power will be 24 dBm for rates lower than MCS7 where Tx limit will be 23 dBm.
Some people argue that this kind of Tx power capping is not nice to client devices near to coverage edge as they receive almost full throughput at one moment and loose signal at next moment (not my own view).
In previous ROS versions it was possible to reduce Tx power by increasing configured value of antenna gain which made the first rule to kick in. In latest versions of ROS, however, it is not possible to change antenna gain on devices with built-in antennae.