TC Electronic DB4 MKII - Manual (Page 81)

ATX / DX
English Manual 77
ATX / DX algorithm –
DTX Limit page
ATX / DX algorithm – DTX Limit page
Link Limiter
When Link is active, the same amount of peak
limiting is always applied to both channels.
Some broadcasters like the sound of operating
left and right limiting without stereo coupling be-
cause they feel that it maximizes loudness and
widens the stereo image. On dual mono sources,
of course you should always choose unlinked
Limiter operation.
The Configuration control on the Main page does
not affect the Link Limiter setting. This link is run-
ning individually from the selected configuration.
Softclip A/L and B/R
Range: -3 dB to Off
When active, Soft Clip applies a saturation ef-
fect on signals close to maximum Output level.
The threshold is relative to the Threshold of the
Brickwall Limiter.
This controlled distortion of transients works well
for adding loudness, but is not a desirable effect
with some data compression codecs. While the
Brickwall Limiter is extremely low distortion, Soft
Clip is not. Use your own judgement if you want
it or not.
Threshold A/L & Threshold B/R
Range: -12 to 0.0 dBFS
Sets the Threshold of the Brickwall Limiter.
The Threshold is relative to 0 dBFS, not to the
Reference Level set on the Main page.
The output limiter detects and protects against
true-peak signals as defined in ITU-R BS.1770
and in EBU R128. This precision limiter is based
on 48 bit processing and utilizes adaptive time
constant for low distortion operation.
Fader A & Fader B
Range: Off to 0 dB
Fader function on the Output. When Dual Mono
configuration is selected, individual Output fad-
ers are available.
ATX / DX algorithm –
ATX Limit page
ATX / DX algorithm – ATX Limit page
Parameters that are not described under DTX
Limit page:
Emphasis
Range: Off, 50 µs, 75 µs, J17
To pre-condition signal better for analog trans-
mission, the limiter in ATX can take downstream
emphasis into account. Note that the output
signal of DB4 or DB8 does not contain pre-em-
phasis, but is linear, so STL data reduction isn’t
compromised. When the Emphasis parameter is
set to Off, linear limiting (like in DTX) is available.
HF Offset
Range: -12 dB to 0 dB
When set to 0 dB, emphasis limiting precisely
follows the selected pre-emphasis curve. How-
ever, lack of peak conservation in the down-
stream signal path (DA converters, sample rate