Modes of operation

Threshold level

Unprocessed

level

 

 

 

 

 

Signal

 

 

 

 

 

signal

 

 

 

 

 

 

 

 

 

 

Threshold level

 

 

 

Limiting

level

 

 

 

 

 

Signal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 6: Compression - limiting signal level graphs

Time

Time

If a compression effect is required together with limiting of high level transients, two channels of the DN540 may be cascaded. The output of Channel 1 (compression) is fed to the input of Channel 2 (limiting), which gives powerful two stage control over gain.

 

+20

Output level (dB)

 

 

+10

 

 

 

 

 

Compressor 2 threshold

 

 

 

Compressor 1 threshold

 

 

 

 

 

Input level (dB)

-20

-10

+10

+20

 

1:1

 

 

 

-10

 

 

 

-20

 

 

Figure 7: Limiting and compression graph

Below the compression threshold, the signal is unaltered. In the example shown in Figure 7 “Limiting and compression graph”, the first threshold is compressed at a mild 2:1 ratio. Whereas, at the second threshold it is firmly limited at a ratio of 20:1.

DN540

 

Operator Manual

25

Page 37
Image 37
Klark Teknik DN540 specifications Modes of operation, Compression limiting signal level graphs