How to set Prism card tx power to 200mw ?

How to set Prism card tx power to 200mw ?
In older Prism package work fine, but in new 2.8.16 only 100mw.
set wlan1 tx-power=23 has no effect.

[admin@MikroTik] interface wireless> print
Flags: X - disabled, R - running
 0    name="wlan1" mtu=1500 mac-address=00:02:4F:90:B9:AA arp=enabled
      disable-running-check=no interface-type=Prism mode=ap-bridge
      ssid="MikroTik" frequency=2412 band=2.4GHz-B scan-list=default-ism
      supported-rates-b=1Mbps,2Mbps,5.5Mbps,11Mbps supported-rates-a/g=""
      basic-rates-b=1Mbps basic-rates-a/g="" max-station-count=2007
      fast-frames=no dfs-mode=none antenna-mode=ant-a wds-mode=dynamic
      wds-default-bridge=none wds-ignore-ssid=no default-authentication=yes
      default-forwarding=yes hide-ssid=no 802.1x-mode=none
[admin@MikroTik] interface wireless> info
[admin@MikroTik] interface wireless info> print
 0 interface-type=Prism firmware="1.1.1/1.7.4, compid 0x800c"
   tx-power-control=no ack-timeout-control=no alignment-mode=yes
   virtual-aps=no noise-floor-control=no scan-support=yes burst-support=no
   supported-bands=2GHz-B
   2GHz-B-channels=2412,2417,2422,2427,2432,2437,2442,2447,2452,2457,2462,2467,
                   2472,2484

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set wlan1 interface-type=

sorry, this properties is read only :frowning:

anyhing but default seems to reduce my signal strength on a netgear MA311 Prism 2.?

What is the maximal output of that netgear ma311?
And how?