Rupert Neve Designs Portico 5016, User Manual

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METER
An eight segment LED bar-graph meter is fitted for the mic pre, calibrated in dBu as follows:
SP, - 18dBu, - 12dBu, -6dBu,
+4 dBu, + 10dBu, + 16dBu, +22dBu
With reference to the balanced output signal level.
The input level can be determined by reading the Meter indication, then subtracting the Gain
settings of the Sensitivity switch and the Trim control. For example, if the meter is r 10
dBu, with the Trim control at, say, +2 and the main Gain switch is at 42, the level of the input
signal is 10 – 42 –2 = -34 dBu.
5016 MIC PRE/DI
7
DI CONTROLS
GAIN Controls the input level for either the DI or the LINE INPUT.
DI: +10dB to +30dB Line Input: 0dB to +20dB
TO BUSS Provides a resistive feed to the Portico™ Buss mix system.
GND LIFT Ground Isolation Push-Button switch
If hum or "buzz" should be heard, which might be caused when a separately
powered and grounded guitar or instrument is connected, a Push-Button on the
front panel lifts the Portico™ 5016 D.I. internal ground rail from the TRS
circuit to break a potential loop. Such Loops are formed when separate
grounded utility power outlets are used, for example on the stage for mixing or
amplifying equipment.
DI/LINE Selects the input source. DI is the TRS input on the front panel, and LINE is the
XLR line input on the back.
THRU An output "Jack", is provided on the front panel that replicates the D.I. input
signal, appearing as an unbalanced source. This "THRU" Output may be used
to feed an external loudspeaker amplifier. (Use a T.R.S. Tip-Ring-Sleeve or a
single pole "Plug")
PHASE ADJUST A continuously variable Rotary control that provides Phase Rotation between
0° and approximately 170° between approximately 75 Hz and 30 kHz. The
level is unnaffected.