[Sephiroth]

Here's a sort of look ahead on this.

1/
If your downstream power levels on your modem are > -3 dBmv, your signal to the V+ box won't need boosting.

2/
If your modem downstream SNR is < 34.5dB, then you're potentially (but nt necessarily) at the edge of a trouble zone that the HDU cannot fix.

3/
If your upstream power (before the HDU was installed) is high - say above 50 dBmv, then the HDU isn't going to help that either, although it might be a necessary level due to your distance from the street cabinet. If your upstream power is 55 dBmv (you need to refresh the power screen a few times to see if it is moving in that direction), then there is an upstream problem that cannot be fixed by the HDU.

The typical application for an HDU is where you live at the end of the cable run from the street cabinet and you have a number of devices split off at the external wall box. The aim of the HDU is to ensure that there is no further powe level drop due to the length of cable around your house to the several devices.

The V+ box will tell you in the Settings menu what the power levels & SNR are. Would be useful to compare against the modem.

HTH