User guide

821024: AMP1-DA/106 User Guide

AMP1-DA/106 User Guide

Rear Panel 6-Position DIP Settings for the Level Meters

Figure 1–8 AMP1-DA/106 Rear Panel DIP Switch

Settigns

Line Level (Auto) Calibration

The unit is calibrated at the factory. To recalibrate:

1. Turn on the power.

2. Apply the desired reference level (nominal 0) signal to all channels.

3. Make sure the Reference Level DIP sections (2 and 3) are set to the

nearest level of the input signal being applied for calibration (i.e., 0, +4,

+6 or +8). The user should make sure that the signal applied to all

four channels is within +/- 4 dB of the reference level selected by DIP

switch sections 2 and 3.

4. Place DIP section 1 in the down position.

5. Wait 10 seconds. The unit will remove the previous calibration and the

new calibration will be applied.

6. Place DIP section 1 in the up position and return unit to service.

Note:

For more accurate indication of signal levels, meters are

tuned to effect a “rounding” function, which occurs between

the thresholds of any two bargraph segments. This means

the level meter zero LED segment will turn on at one-half

the smallest spacing between LED segments (mid-scale

resolution) before that segment's scale indication.