LM 128P
Loudness and Peak Program Meter according to EBU R 128
16
SSB AUDIO GmbH * Sonnenweg 25 * 30827 Garbsen, Germany
Tel.: +49 5131 464272 * www.ssb-audio.com * [email protected]
The following commands, terminated by
CR/LF
, can be sent to the LM:
!RUN
Starts or resumes the integrated and range measurement
!HLT
Halts (pause) the integrated and range measurement
!RES
Resets the integrated and range measurement
!G00
No additional gain for PPM scale
!G20
20 dB additional gain for PPM scale
!MDL
Operation Mode Loudness Meter
!MDP
Operation Mode Peak Program Meter
8
Appendix
Table: Relations between dB values, gain and level in dBu
dB
Voltage and
Current Gain
Power Gain
dBu
Voltage (RMS)
0
1
1
0
0.77459667
1
1.12201846
1.25892542
1
0.86911176
2
1.25892542
1.5848932
2
0.97515943
3
1.41253756
1.99526237
3
1.09414689
4
1.5848932
2.51188647
4
1.227653
5
1.77827941
3.16227766
5
1.37744931
6
1.99526237
3.98107192
6
1.54552359
7
2.23872111
5.0118722
7
1.73410591
8
2.51188647
6.30957362
8
1.94569889
9
2.81838285
7.94328191
9
2.18310997
10
3.16227766
10
10
2.44948974
11
3.54813399
12.5892548
11
2.74837277
12
3.98107192
15.8489337
12
3.08372505
13
4.46683568
19.952621
13
3.45999604
14
5.0118722
25.1188629
14
3.88217951
15
5.62341325
31.6227766
15
4.35587717
16
6.30957362
39.8107192
16
4.88737471
17
7.07945823
50.1187289
17
5.48372477
18
7.94328191
63.0957275
18
6.15283971
19
8.91250914
79.4328191
19
6.90359989
20
10
100
20
7.74596669
