Hi Xiang,<br>
<br>
All the commands are described in the programmer's manual: <a href="https://www.tek.com/en/sitewide-content/manuals/4/5/6/4-5-6-series-mso-programmer-manual">https://www.tek.com/en/sitewide-content/manuals/4/5/6/4-5-6-series-mso-programmer-manual</a><br>
<br>
To answer your questions:<br>
1) Channel labels can bet set by: <code><span dir=ltr role=presentation style="left:7.63%;top:25.75%;font-family:sans-serif;">CH<x>:<span class="highlight appended">LABel</span>:NAMe</span></code><br>
2) Channel bandwidth can be set by: <code><span dir=ltr role=presentation style="left:9.99%;top:37.64%;font-family:sans-serif;">CH<x>:BANdwidth</span></code>