output level trim Ultralite AVB

[lacsapnoc]

Hi,

I want to set the main outputs of the Ultralite AVB to a level of about -20dBu.
In the tech specs of the Ultralite AVB it is mentioned that the analog outputs have a max level of +20dBu with a trim range of -4 to 20dB. If I go to Device -> Output Settings in the software mixer I can set the trim of the phones (-127 to 0), main out(-127 to 0) and analog outputs (-24 to 0).
I would now assume that a trim setting of 0dB results in the maximum output level of 20dBu. Setting the trim to -40dB on the mains should then result in a output of -20dBu, is this correct?