VC1QCS Studio Channel - User's guide
Turn the INPUT GAIN knob down to minimum then, If you are using a capacitor microphone, plug in the microphone, then switch on the phantom power by pressing in the 'Phantom' switch. (Do it in that order). NOTE. Some phantom powered microphones take several minutes to reach correct working conditions. Remember to switch on at least 5 minutes before using the microphone. Turn up the INPUT GAIN until sound registers on the VU meter (VU switch in). Do not let the VU needle hit the end stop too hard or overload may possibly happen. The meter electronics has been adjusted so that it is normal for the needle to move in the red area. OVERLOAD MARGIN AND THE VU. METER For steady tones, the '0' on the VU meter corresponds to 0dBu (Where 0dBu is 0.775v RMS on the line output with the output control set at '0'). This setting of '0' is to allow for the considerable under-read that occurs with all VU meters with music signals. It is normal for the peaks of signals to go to +10dBu while the VU meter reads only '0'. In practice, when the VU meter is peaking at or just above '0' the music signal will be well within normal limits and will have a significant overload margin. Even with the needle hitting the end stop, the signal will not be distorted; although the overload margin will be reduced. (The VU meter is connected before the output gain control)
