Specifications

Model AC1120A, AC1121A, AC1122A, AC1123A

Note about VU Meter Function

The front panel VU meter function is available on both the 16x16 and the

8x8 units with standard or Pro audio versions. However on the standard

version the

 and  buttons do not change the volume level. The user

can do that at the source and use the matrix to monitor the level.

3.1.8.1 Using the Front Panel VU meter

This function is useful for ensuring no noticeable volume difference among the

audio sources for models AC1121A and AC1123A.

All units with audio option have this feature. Enter the audio adjustment mode as

described above. The bottom row of LEDs (output channel row) indicates the

sound level. The indicated gain/attenuation is based on the matrix’s internal

reference level of -10dBV (standard line-level).

On a 16x16 matrix LED position 10 corresponds to 0 VU (desired peak level).

Position 1 corresponds to -20 VU and position 16 corresponds to +6 VU.

The bottom row of 8 or 16 LEDs indicate the sound level. Position 10 (or 5 for

8x8 matrix) is used to correspond to 0 VU (desired peak level).

Figure 11 –Comparison

with Analog VU meter on

16x16 Matrix