[Elecraft] KX3 Programming Passband and Passband offset ?

[John Newgas]

My KX3 is often operated remotely via a Raspberry Pi and VNC - mainly for digital working with JS8Call and WSJT-X. 
I’ve set up a set of programmed instructions that I run before each session to make sure that everything is set up correctly such as Data Mode A, Power Output, Microphone and Audio Settings.

I can see how to set the Bandwidth (Passband Tuning ) using the BW Command but  I want to have a defined bandwidth of 500 to 2500 Hz,   Is the right way to use 
 BW 20 ; IS 1500 ;    ?  Or is there a better way to adjust the PassBand offset ?

John G7LTQ