I believe you can make adjustments via the menu software. Hold down the func button while powering on - then press rb, nb/anl, dw in order and it should take you into a function menu.
If will show some numbers by mode (AM,LSB,USB) and you can adj the freq by turning the channel knob. The numbers are arbitrary so make sure you mark down your starting point and then adjust up or down from there.
I messed around with this one day a while back so I think this is correct but I can't make any guarantees.