hi

I am experiencing low bandwidth issue with my MikroTik NetBox5 AX pair, which is paired with MANT30 antennas. Despite using 80 MHz and 160 MHz channel widths, I am only achieving bandwidths of 400 to 450 Mbps on 80mhz and 400 Mbps on 160mhz, respectively, within a single room. This performance is significantly lower than expected for these configurations.

Here are the details of my setup:

Device Model: NetBox5 AX (Pair)
Antenna Model: MANT30
Channel Width: 80 MHz and 160 MHz
Observed Bandwidth: 400-450 Mbps on 80 MHz, 400 Mbps on 160 MHz
Environment: Single room with minimal physical obstructions
Could anyone please provide guidance on troubleshooting this issue? I have already verified the following:

Firmware is up-to-date 7.15.3 stable.
Channel settings are optimized and not overlapping with other devices.
Devices and antennas are within a close range of each other with minimal interference.

hear is config of ap
# 2024-09-07 16:27:06 by RouterOS 7.15.3
# software id =
#
# model = L11UG-5HaxD
#
/interface bridge
add admin-mac= auto-mac=no comment=defconf name=bridge
/interface wifi
set [ find default-name=wifi1 ] channel.band=5ghz-ax .skip-dfs-channels=all \
.width=80mhz configuration.country=Russia .distance=0 .mode=ap .ssid=\
"NETBOX 5AX" disabled=no security.authentication-types=wpa2-psk,wpa3-psk \
.ft=yes .ft-over-ds=yes
/interface list
add name=WAN
add name=LAN
/interface bridge port
add bridge=bridge comment=defconf interface=ether1
add bridge=bridge comment=defconf interface=wifi1
/interface list member
add interface=ether1 list=WAN
add interface=bridge list=LAN
/ip address
add address=10.11.10.1/24 interface=bridge network=10.11.10.0
/ip dhcp-client
add comment=defconf interface=bridge
# DHCP client can not run on slave or passthrough interface!
add interface=ether1
/system clock
set time-zone-name=Asia/Kolkata
/system note
set show-at-login=no

config of station

# 1970-01-02 00:05:39 by RouterOS 7.15.3
#
# model = L11UG-5HaxD
# serial number =
/interface bridge
add admin-mac=D4:01:C3:BA:1D:A6 auto-mac=no comment=defconf name=bridge
/interface wifi
set [ find default-name=wifi1 ] channel.band=5ghz-ax .skip-dfs-channels=all \
.width=20/40/80/160mhz configuration.country=Russia .mode=station-bridge \
.ssid="NETBOX 5AX" disabled=no security.authentication-types=\
wpa2-psk,wpa3-psk .ft=yes .ft-over-ds=yes
/interface bridge port
add bridge=bridge comment=defconf interface=ether1
add bridge=bridge comment=defconf interface=wifi1
/ip dhcp-client
add comment=defconf interface=bridge
/system note
set show-at-login=no

Can you post your config export?

Be sure you have your Country / Region set. What 5Ghz Frequency are you using? I believe 5220 is MikroTik "sweet spot". Lastly, since newer 7.13? release -- you have to manually configure distance value.

At what signal strength do the points see each other?
Most likely the problem is in incorrect experimental conditions

finaly romoved netbox5 ax and installed mimosa C5c devices now stable signal -59 distance is 25km and bandwidth is around 500 mbps.

finaly romoved netbox5 ax and installed mimosa C5c devices now stable signal -59 distance is 25km and bandwidth is around 500 mbps.

Exactly. Great job.