6.4 Setting Bus Output Levels
The bus output level trim pots are located on the rear panel of the Digital Master Module.
Trims are available for Track buses 1–12 and Stereo Left and Right buses.
The following procedure assumes that your Input Module Tape input sensitivity is set to
+4 dBu (see
§6.2
). If not, substitute a -10 dBu signal for all +4 dBu references.
6.4.1 Calibrating Track Bus Outputs
To calibrate the Track bus out levels:
1.
Patch a +4 dBu 1 kHz sine wave into an Input module Tape input.
2.
Assign the Mix path of the module to all 12 Track buses. Set the console
meters to display Group levels.
3.
Pan the Mix path Pan Pot all the way Left. Raise the Mix path fader until the
“0” LED lights on all odd numbered meters.
When this happens, the fader
should be at the “0” mark on the fader panel.
4.
Patch a calibrated meter to the console’s Track outputs, set each odd
numbered Track bus output trim until the meter reads +4 dBu.
5.
Pan the Mix path Pan Pot all the way Right. Adjust the Mix path fader until the
“0” LED lights on all even numbered meters.
When this happens, the fader
should be at the “0” mark on the fader panel.
6.
Set each even numbered Track bus output trim until the meter reads +4 dBu.
6.4.2 Calibrating Stereo Bus Outputs
Calibrating the Stereo bus outputs requires adjusting trim pots on the rear panel of the
Digital Master module and the Analog Master PC board (Assy No. 181582 or PB-1GXA).
To access the Analog Master, remove the Auxiliary panel adjacent to the Digital Master
module.
To calibrate the Stereo bus out levels:
1.
Patch a +4 dBu 1 kHz sine wave into an Input module Tape input. Assign the
Mix path of the module to the Stereo Mix bus.
2.
Pan the Mix path Pan Pot all the way Left. Set the Mix path fader to the “0”
mark on the panel.
3.
Patch a calibrated meter to the console’s Left Stereo Insert Send. Set the Left
Stereo bus output trim on the rear panel of the Digital Master module until the
meter reads +4 dBu.
4.
Pan the Mix path Pan Pot all the way Right. Set the Mix path fader to the “0”
mark on the panel.
5.
Patch a calibrated meter to the console’s Right Stereo Insert Send. Set the
Right Stereo bus output trim on the rear panel of the Digital Master module
until the meter reads +4 dBu.
6.
Patch the +4 dBu tone into the Left Stereo Insert Return. Set the Stereo
Master fader to “0” (full up).
7.
Patch the calibrated meter to the console’s Left Stereo bus output. Set the
VR19 on the Analog Master board until the meter reads +4 dBu.
8.
Patch the +4 dBu tone into the Right Stereo Insert Return. Set the Stereo
Master fader to “0” (full up).
Section 6 - Alignment and Maintenance
STATUS 18R
Operation and Maintenance Manual
6 - 4
August 1999
Digital Master Rear Panel
Stereo
R
12/24
10/22
L
11/23
9/21
8/20
6/18
Track
4/16
2/14
Output Trim
7/19
5/17
3/15
1/13