Speck Electronics Xtramix - Manual (Page 33)

These are the individual master level controls for the eight subgroup
outputs. Metering for the bus/subgroup outputs is provided by two LED
VU meters in selectable pairs (1/2, 3/4, 5/6, 7/8 ).
The optimum starting point for a Bus/Subgroup Master is the three
o'clock position. This should provide for the greatest range of
adjustment at the input channels and effects returns as well as the
Subgroup Master Control itself.
If a Subgroup Master Control is operated at a lower than normal setting,
it may be an indication that the input channels and/or effects returns
assigned to it are either adjusted to high or need to be set to a Low level
status (see Input channel “High/Low” Switch on the rear panel).
When the monitor channel Pre/Post Switch is set to the Pre position, the
operation of the Subgroup Master Control has no affect on the levels set
for the monitor channel. If the Pre/Post switch is set to Post, then any
level changes made to the Subgroup Master Control may be perceived as
a level change to its respective monitor channel.
This LED will illuminate green when the power is applied to the
Xtramix. When any solo is depressed, this LED will change from green
to red.
These 10 segment VU (volume units) meters indicate the relative levels
of the stereo program and 8 subgroup outputs, and are sensitive from -
20db to +3db.
Depending on the position of the meter sensitivity trim pots, a meter
reading of zero VU reflects a mixer output level of either +4dbu, the
industry professional standard, -10dbV, or virtually any reference level
you care to set. This VU meter circuit was designed to approximate the
ballistics of a "Taut Band" analog style VU meter.
This momentary switch selects the VU meters for the 8 subgroup
outputs and the program master feed. To select a pair of meters, depress
this switch until the desired pair is indicated on the lower LED's. The
left and right program master feeds are automatically selected when the
Xtramix is initially powered.
The 5 LED's indicate the selection of the respective VU meter pairs. The
L-R, indicates the left/right program master is being displayed. The 1-2,
3-4, 5-6, or 7-8 indicates that the respective subgroup output pairs are
being displayed.
Only one VU pair may be selected at a time.
32. Power/Master Solo LED
33. Dual VU Displays
34. VU Meter Select Switch
35. Meter Select Indicators
28
Master Section
31. Bus/Subgroup Masters 1-8
Refer to Figure 5 for location of items 31 thru 48.
Chapter 4 Operation Section