Application guide 89 – Lab.gruppen PLM 20000Q User Manual
Page 95
Application Guide
89
PLM Series Operation Manual rev 1.2.3
▸
Input Clip: 0 dBFS
▸
Amp Gain: 35 dB
▸
SNR: 114.2 dB
▸
Absolute Noise Floor: -71.3 dBu
-250,0
-200,0
-150,0
-100,0
-50,0
0,0
50,0
100,0
Analog
AES Input
Input Mixer
Module In
Module Out
Amp
Attenuation
Analog Ref
Amp Gain
ISVPL
Output
dB
/d
B
u
Clip
Nominal
Noise
Figure 10-2: Digital Input: Low Noise with Good Headroom (High Input / High SPL)
Figure 10-3 illustrates how to achieve the lowest possible output noise, although this is not a recommended
configuration.
▸
Input Clip: 0 dBFS
▸
Amp Gain: 22 dB
▸
SNR: 114.8 dB
▸
Absolute Noise Floor: -71.9 dBu
-250,0
-200,0
-150,0
-100,0
-50,0
0,0
50,0
100,0
Analog
AES Input
Input Mixer
Module In
Module Out
Amp
Attenuation
Analog Ref
Amp Gain
ISVPL
Output
dB
/d
B
u
Clip
Nominal
Noise
Figure 10-3: Digital Input Optimized for Minimum Noise - Not Recommended
The improvement in noise performance (at the cost of losing headroom and compression features) is only
0.6 dB; it is therefore not recommended to optimize performance in this manner.