Vu Meter "0" Calibration; Peak Led Trip Point Calibration; External Monitor Input Level; Cue Bus External Input Level - Radio Systems Millenium-A Analog Console Installation And Operation Manual

Radio Systems Millenium-A Console
4. Move the voltmeter, and adjust the right program output, followed by the left audition output, right audition
output and mono output.
4.5.2

VU Meter "0" Calibration

The console was calibrated at the factory for an output level of +4dBv, into 600 ohms, when the VU meters indicate "0".
To calibrate the VU meter "0" indication:
1. Perform output level calibration as detailed previously.
2. Adjust the VU meter calibrate trimmers, located on the Output Board for a "0" reading on each meter.
Note: Six channel consoles share the same meters for program and audition monitoring. The front panel VU meter
switch selects the signal to be displayed. Adjustment must be made with both switch settings.
4.5.3

Peak LED Trip Point Calibration

The console was calibrated at the factory for an output level of +4dBv, into 600 ohms, when the VU meters indicate "0",
and for a peak LED trip point of +2VU. To perform Peak LED Trip Point Calibration:
1. Perform output level calibration as detailed previously.
2. Perform VU meter "0" calibration as detailed previously.
3. Adjust oscillator to the desired peak LED trip point level (typically 0 to 3dB hotter).
4. Adjust the peak LED trip point trimmers to that the LEDs just illuminate.
Note: Six channel consoles share the same meters for program and audition monitoring. The front panel VU meter
switch selects the signal to be displayed. Adjustment must be made with both switch settings.
4.5.4

External Monitor Input Level

There is a separate adjustment, located on the Output Board for each of the four stereo external inputs.
1. Connect a high impedance voltmeter to the unmuted monitor output.
2. Select a high level input, and reproduce the nominal level from a test tape, record or CD.
3. Turn the mixing channel "on", select the program mix bus, and adjust the fader for "0" VU.
4. Depress the "program" monitor input switch.
5. Note the reading on the voltmeter.
6. Feed the nominal input level to any external input and select that monitor input switch.
7. Adjust the associated external input level trimmer until the voltmeter gives the same indication as in step 5.
8. Repeat steps 6 and 7 for all external inputs.
4.5.5

Cue Bus External Input Level

The level adjustment for the external cue bus input is located on the Output Board.
1. Connect a high impedance voltmeter to the external cue speaker terminals.
2. Select a high level input, and reproduce the nominal level from a test tape, record or CD.
3. Place the mixing channel into "cue", and adjust the cue level control VR2 for normal listening level.
4. Note the reading on the voltmeter.
5. Feed the nominal input level into the external cue input.
6. Adjust the external cue input level trimmer until the voltmeter gives the same indication as in step 4.
4.5.6

VCA Distortion Null Adjustments

These adjustments are factory set and should only require adjusting if a VCA is replaced. Consult the Theory of Opera-
tion and Troubleshooting Section for detailed directions.
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