Hello,
What is the correct CLI command to set min-antenna-gain value in 7.x?
Can’t find in official doc.
min-anrenna-gain is read-only parameter, set to non-zero value on all devices with non-changeable antennae.
In ROS 6.x it was possible to use the following CLI command to set current antenna-gain.
/interface wireless set antenna-gain=2
What is the way to do the same in ROS 7.x?
Parameters min-antenna-gain and antenna-gain are not the same.
I don’t know if it is still possible to set antenna gain in v7, but if what you want to do is to reduce Tx power of wifi AP, then you can simply set Tx power to desired value. @normis (Mikrotik support guy) explained Tx power strategy in this post.
I wanted to reduce antenna-gain to get more actual tx-power, because antenna-gain is substituted from tx-power.
“antenna gain” parameter in MT is the information you give to RouterOS, so that RouterOS can limit the TX-power so you comply with legislation on EIRP transmissions.
It is “information given”, not a setting of any operational antenna-part of the AP.
Since long, that information cannot be cheated (reduced) to have a higher EIRP (=TX-power+antenna gain+3dB for double chain) than the legal values, for devices with known built in antennae.
Reducing min-antenna-gain is illegal.
It has been used in the past to reduce the EIRP by providing a higher number than the real antenna gain, while ROS is missing another way to set a relative reduction in RF power emitted.