The "Scale" key in the "PPM Analog" section of the PPM menu is used to select the scale displayed in the PPM instrument. Depending on the individual scale selected, certain instrument parameters are switched as well. The most important parameters for each scale are listed below.
Standard: |
DIN |
Scale Range: |
+5 ... -50 dB |
Type: |
absolute |
Reference Level: |
+6 dBu for 0 dB (scale) with analog input reference set to +6 dBu (default) |
Integration Time: |
10 ms (for -1 dB display) (default) |
Red Area: |
+5 ... 0 dB |
Release Time: |
0 ... -20 dB: 1.5 s |
Standard: |
True Peak |
Scale Range: |
+3 ... -60 dBTP |
Reference Level: |
0 dBTP (scale) corresponding to common selected analog reference value in dBu with analog input reference set to +6 dBu (default) |
Integration Time: |
True Peak |
Headroom: |
0 dB (selectable in the range from 0 to -20 dB in steps of 1 dB) |
Release Time: |
0 ... -20 dB: 1,5 s |
Standard: |
True Peak |
Scale Range: |
+3 ... -20 dBTP |
Reference Level: |
0 dBTP (scale) corresponding to common selected analog reference value in dBu with analog input reference set to +6 dBu (default) |
Integration Time: |
True Peak |
Headroom: |
0 dB (selectable in the range from 0 to -20 dB in steps of 1 dB) |
Release Time: |
0 ... -20 dB: 1,5 s |
Standard: |
DIN |
Scale Range: |
+10 ... -50 dB |
Type: |
absolute |
Reference Level: |
+6 dBu for 0 dB (scale) with analog input reference set to +6 dBu (default) |
Integration Time: |
10 ms (for -1 dB display) (default) |
Red Area: |
+10 ... 0 dB |
Release Time: |
0 ... -20 dB: 1.5 s |
Standard: |
IEC 268-1 (Nordic) |
Scale Range: |
+12 ... -42 dB |
Type: |
absolute |
Reference Level: |
+6 dBu for +6 dB (scale) with analog input reference set to +6 dBu (default) |
Integration Time: |
10 ms (for 5 dB display) (default) |
Red Area: |
+12 ... +6 dB (default) |
Release Time: |
+6 ... -14 dB: 1.7 s |
Standard: |
IEC 268-IIa |
Scale Range: |
7 ... 1 |
Type: |
absolute |
Reference Level: |
+8 dBu for "6" (scale) with analog input reference set to +6 dBu (default) |
Integration Time: |
20 ms (for 5.75 display) (default) |
Red Area: |
7 ... 6 |
Release Time: |
7 ... 1: 2.8 s |
Standard: |
IEC 268-IIb |
Scale Range: |
+12 ... -12 dB |
Type: |
absolute |
Reference Level: |
+8 dBu for 8 dB (scale) with analog input reference set to +6 dBu (default) |
Integration Time: |
20 ms (for 7 dB display) (default) |
Red Area: |
+12 ... +8 dB |
Release Time: |
+12 ... -12 dB: 2.8 s |
Standard: |
none |
Scale Range: |
+10 ... -10 dB |
Type: |
absolute |
Reference Level: |
+6 dBu for 0 dB (scale) with analog input reference set to +6 dBu (default) |
Integration Time: |
10 ms (for -1 dB display) (default) |
Red Area: |
+10 ... 0 dB |
Release Time: |
+10 ... -10 dB: 1.5 s |
Standard: |
none |
Scale Range: |
+1 ... -1 dB |
Type: |
absolute |
Reference Level: |
+6 dBu for 0 dB (scale) with analog input reference set to +6 dBu (default) |
Integration Time: |
10 ms (for -1 dB display) (default) |
Red Area: |
+1 ... 0 dB |
Release Time: |
0 ... -1 dB: 1.0 s |
Standard: |
SMPTE |
Scale Range: |
+24 ... -30 dB |
Type: |
absolute |
Reference Level: |
+6 dBu for 6 dB (scale) with analog input reference set to +6 dBu (default) |
Integration Time: |
10 ms (for 5 dB display) (default) |
Headroom: |
+4 dBu (fixed) |
Release Time: |
0 ... -20 dB: 1.5 s |
Standard: |
SMPTE |
Scale Range: |
+20 ... -40 dB |
Type: |
absolute |
Reference Level: |
+6 dBu for 2 dB (scale) with analog input reference set to +6 dBu (default) |
Integration Time: |
10 ms (for 1 dB display) (default) |
Headroom: |
0 dBu (fixed) |
Release Time: |
0 ... -20 dB: 1.5 s |
Standard: |
NHK |
Scale Range: |
0 ... -60 dB |
Type: |
relative |
Reference Level: |
0 dB (scale) corresponding to selected "NHK Reference" value (Example: NHK Reference = 24 dBu, 0 dB scale = +24 dBu input with analog input reference set to +6 dBu) |
Integration Time: |
10 ms (for -1 dB display) (default) |
Headroom: |
0 dBu (fixed) |
Release Time: |
0 ... -20 dB: 1.5 s |