You can make some adjustments to your FX-4a. Please NOTE that when you open the FX-4a to make modifications, we do NOT warranty the product. Please exercise extreme caution so that you do not render your unit inoperable. With that said, if you wish to make some adjustments, we are supplying a few pictures to assist you. You need to use your analyzer to make sure that you do not over adjust to raise emissions above FCC requirements.
Click on Pictures for Higher Res View