HT extension channel is missing ROS 6.5

RouterOS Wireless Networking
1

Hi all,
I have some questions regarding my two SXT Lite5 (Winbox shows Rb SXT 5nD r2) wireless devices. Let’s start. I have updated my devices to ROS 6.5 (+upgrade firmware).

  1. I don’t see HT Extension Channels setting under HT Tab. More, There is no such command in console. There is no 40Mhz channel width setting in menu (I still see 40mhz-turbo in console but system does not allow me to setting it up with failure: incopatible band and channel-width). How can I use my 802.11n device with 40MHz width?
  2. Devices work in bridge mode. AP has band=5Ghz-only-N width=20Mhz frequency=5180Mhz. When client runs ‘scanning’ winbox shows this AP but it shows frequency 5Ghz-A or 5Ghz-A/n, but never 5Ghz-only-N. Is it normal behavior?
  3. Does this device (Atheros AR9300) support Spectral Analyzer? when I do >interface wireless info print it shows me under capabilities spectral-scan but I’m unlucky while running >interface wireless spectral-history (or spectral-scan) wlan1 and get an error failure: allowed ranges [4910; 6110]
2

I’m answering my questions (with help of mikrotik support) :slight_smile:

  1. 40Mhz equals 20/40mhz-ht-above | 20/40mhz-ht-below setting under Wireless tab. There is no more need in ht-extension-channel setting.
  2. (still has no ideas)
  3. Yes, it supports and works. Here is the right command to run analyzer:
/interface wireless spectral-scan wlan1 range=4910-6110

(of course you need to adjust range). Without range option it will fail.