Fostex VM200 manual Inverting the Input Phase, Press the Exit key or the CHANNEL/METER key

Input Channels

Inverting the Input Phase

“Phase” concerns the timing of two different signals. A pair of stereo speakers can operate “in phase” or “out of phase.” If the drivers in the left and right speakers move in and out at the same time, in per- fect concert with one another, the speakers are “in phase.” If they are out of sync, they are “out of phase.” Out-of-phase speakers tend to produce a weak stereo image and low bass output.

Phase is often represented by this symbol: ∅.

On the VM200, you can invert the phase for channels 1–20. First you access the PHASE function page, then press an [EQ EDIT] key to turn phase inversion on or off. A light indicator on the display means phase is normal (off) for that channel; a dark (highlighted) indicator means phase is inverted (on).

You can use the phase inversion software switches to compensate for balanced cables or microphones that may have been wired incor- rectly, or at any time you wish to invert the phase of a channel to pre- vent signal cancellation.

1.Press the [ROUTING/PHASE] key repeatedly to display the 3:∅ PHASE function page.

The [ROUTING/PHASE] key and the [EQ EDIT] keys for all selectable channels start to flash (indicating their availability).

The 3:∅ PHASE function page includes a 1-by-20 matrix that indi- cates whether the phase is normal or reversed for each channel.

Indicates phase is normal. Indicates Phase is reversed.

2.Press a Page Select key to select the target channel layer, then press the [EQ EDIT] key for any channel to reverse its phase.

The [EQ EDIT] key lights up if you turn phase inversion on.

Even when channels are configured as stereo pairs, their phase switches can be set independently.

3.Press the [EXIT] key or the [CHANNEL/METER] key.

The VM200 displays the CHANNEL EDIT function page.

64 VM200 User’s Guide