[Yaesu] What am I doing wrong?

[Charles Bibb]

Hi, all

I'm playing with my brand new FT-1000MP Mark V, trying to learn all the 
functions, but one thing has me puzzled.  I can only get the IDBT to come 
on in the LSB and USB modes.

For CW, I have the YF-114CN filter installed and activated in the 2nd IF, 
and the YF-115C filter installed and activated in the 3rd IF (still need to 
get the YF-110CN filter).  In CW mode the IDBT will not engage.

I tried de-activating both filters, but that did not help, and I can't find 
a menu function that addresses this.

Any help?

Charles - K5ZK